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------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- S E M _ C H 1 0 --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNAT; see file COPYING3. If not, go to --
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-- http://www.gnu.org/licenses for a complete copy of the license. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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with Atree; use Atree;
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with Debug; use Debug;
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with Einfo; use Einfo;
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with Errout; use Errout;
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with Exp_Util; use Exp_Util;
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with Elists; use Elists;
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with Fname; use Fname;
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with Fname.UF; use Fname.UF;
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with Freeze; use Freeze;
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with Impunit; use Impunit;
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with Inline; use Inline;
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with Lib; use Lib;
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with Lib.Load; use Lib.Load;
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with Lib.Xref; use Lib.Xref;
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with Namet; use Namet;
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with Nlists; use Nlists;
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with Nmake; use Nmake;
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with Opt; use Opt;
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with Output; use Output;
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with Par_SCO; use Par_SCO;
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with Restrict; use Restrict;
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with Rident; use Rident;
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with Rtsfind; use Rtsfind;
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with Sem; use Sem;
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with Sem_Ch3; use Sem_Ch3;
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with Sem_Ch6; use Sem_Ch6;
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with Sem_Ch7; use Sem_Ch7;
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with Sem_Ch8; use Sem_Ch8;
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with Sem_Dist; use Sem_Dist;
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with Sem_Prag; use Sem_Prag;
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with Sem_Util; use Sem_Util;
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with Sem_Warn; use Sem_Warn;
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with Stand; use Stand;
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with Sinfo; use Sinfo;
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with Sinfo.CN; use Sinfo.CN;
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with Sinput; use Sinput;
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with Snames; use Snames;
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with Style; use Style;
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with Stylesw; use Stylesw;
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with Tbuild; use Tbuild;
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with Uname; use Uname;
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package body Sem_Ch10 is
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-----------------------
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-- Local Subprograms --
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-----------------------
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procedure Analyze_Context (N : Node_Id);
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-- Analyzes items in the context clause of compilation unit
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procedure Build_Limited_Views (N : Node_Id);
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-- Build and decorate the list of shadow entities for a package mentioned
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-- in a limited_with clause. If the package was not previously analyzed
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-- then it also performs a basic decoration of the real entities. This is
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-- required to do not pass non-decorated entities to the back-end.
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-- Implements Ada 2005 (AI-50217).
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procedure Check_Body_Needed_For_SAL (Unit_Name : Entity_Id);
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-- Check whether the source for the body of a compilation unit must be
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-- included in a standalone library.
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procedure Check_Private_Child_Unit (N : Node_Id);
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-- If a with_clause mentions a private child unit, the compilation
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-- unit must be a member of the same family, as described in 10.1.2.
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procedure Check_Stub_Level (N : Node_Id);
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-- Verify that a stub is declared immediately within a compilation unit,
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-- and not in an inner frame.
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procedure Expand_With_Clause (Item : Node_Id; Nam : Node_Id; N : Node_Id);
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-- When a child unit appears in a context clause, the implicit withs on
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-- parents are made explicit, and with clauses are inserted in the context
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-- clause before the one for the child. If a parent in the with_clause
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-- is a renaming, the implicit with_clause is on the renaming whose name
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-- is mentioned in the with_clause, and not on the package it renames.
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-- N is the compilation unit whose list of context items receives the
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-- implicit with_clauses.
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function Get_Parent_Entity (Unit : Node_Id) return Entity_Id;
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-- Get defining entity of parent unit of a child unit. In most cases this
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-- is the defining entity of the unit, but for a child instance whose
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-- parent needs a body for inlining, the instantiation node of the parent
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-- has not yet been rewritten as a package declaration, and the entity has
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-- to be retrieved from the Instance_Spec of the unit.
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function Has_With_Clause
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(C_Unit : Node_Id;
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Pack : Entity_Id;
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Is_Limited : Boolean := False) return Boolean;
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-- Determine whether compilation unit C_Unit contains a [limited] with
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-- clause for package Pack. Use the flag Is_Limited to designate desired
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-- clause kind.
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procedure Implicit_With_On_Parent (Child_Unit : Node_Id; N : Node_Id);
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-- If the main unit is a child unit, implicit withs are also added for
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-- all its ancestors.
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function In_Chain (E : Entity_Id) return Boolean;
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-- Check that the shadow entity is not already in the homonym chain, for
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-- example through a limited_with clause in a parent unit.
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procedure Install_Context_Clauses (N : Node_Id);
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-- Subsidiary to Install_Context and Install_Parents. Process only with_
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-- and use_clauses for current unit and its library unit if any.
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procedure Install_Limited_Context_Clauses (N : Node_Id);
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-- Subsidiary to Install_Context. Process only limited with_clauses for
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-- current unit. Implements Ada 2005 (AI-50217).
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procedure Install_Limited_Withed_Unit (N : Node_Id);
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-- Place shadow entities for a limited_with package in the visibility
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-- structures for the current compilation. Implements Ada 2005 (AI-50217).
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procedure Install_Withed_Unit
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(With_Clause : Node_Id;
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Private_With_OK : Boolean := False);
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-- If the unit is not a child unit, make unit immediately visible. The
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-- caller ensures that the unit is not already currently installed. The
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-- flag Private_With_OK is set true in Install_Private_With_Clauses, which
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-- is called when compiling the private part of a package, or installing
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-- the private declarations of a parent unit.
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procedure Install_Parents (Lib_Unit : Node_Id; Is_Private : Boolean);
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-- This procedure establishes the context for the compilation of a child
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-- unit. If Lib_Unit is a child library spec then the context of the parent
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-- is installed, and the parent itself made immediately visible, so that
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-- the child unit is processed in the declarative region of the parent.
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-- Install_Parents makes a recursive call to itself to ensure that all
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-- parents are loaded in the nested case. If Lib_Unit is a library body,
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-- the only effect of Install_Parents is to install the private decls of
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-- the parents, because the visible parent declarations will have been
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-- installed as part of the context of the corresponding spec.
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procedure Install_Siblings (U_Name : Entity_Id; N : Node_Id);
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-- In the compilation of a child unit, a child of any of the ancestor
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-- units is directly visible if it is visible, because the parent is in
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-- an enclosing scope. Iterate over context to find child units of U_Name
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-- or of some ancestor of it.
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function Is_Child_Spec (Lib_Unit : Node_Id) return Boolean;
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-- Lib_Unit is a library unit which may be a spec or a body. Is_Child_Spec
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-- returns True if Lib_Unit is a library spec which is a child spec, i.e.
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-- a library spec that has a parent. If the call to Is_Child_Spec returns
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-- True, then Parent_Spec (Lib_Unit) is non-Empty and points to the
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-- compilation unit for the parent spec.
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--
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-- Lib_Unit can also be a subprogram body that acts as its own spec. If the
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-- Parent_Spec is non-empty, this is also a child unit.
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procedure Remove_Context_Clauses (N : Node_Id);
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-- Subsidiary of previous one. Remove use_ and with_clauses
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procedure Remove_Limited_With_Clause (N : Node_Id);
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-- Remove from visibility the shadow entities introduced for a package
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-- mentioned in a limited_with clause. Implements Ada 2005 (AI-50217).
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procedure Remove_Parents (Lib_Unit : Node_Id);
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-- Remove_Parents checks if Lib_Unit is a child spec. If so then the parent
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-- contexts established by the corresponding call to Install_Parents are
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-- removed. Remove_Parents contains a recursive call to itself to ensure
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-- that all parents are removed in the nested case.
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procedure Remove_Unit_From_Visibility (Unit_Name : Entity_Id);
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-- Reset all visibility flags on unit after compiling it, either as a
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-- main unit or as a unit in the context.
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procedure Unchain (E : Entity_Id);
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-- Remove single entity from visibility list
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procedure Analyze_Proper_Body (N : Node_Id; Nam : Entity_Id);
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-- Common processing for all stubs (subprograms, tasks, packages, and
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-- protected cases). N is the stub to be analyzed. Once the subunit
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-- name is established, load and analyze. Nam is the non-overloadable
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-- entity for which the proper body provides a completion. Subprogram
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-- stubs are handled differently because they can be declarations.
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procedure sm;
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-- A dummy procedure, for debugging use, called just before analyzing the
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-- main unit (after dealing with any context clauses).
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--------------------------
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-- Limited_With_Clauses --
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--------------------------
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-- Limited_With clauses are the mechanism chosen for Ada05 to support
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-- mutually recursive types declared in different units. A limited_with
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-- clause that names package P in the context of unit U makes the types
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-- declared in the visible part of P available within U, but with the
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-- restriction that these types can only be used as incomplete types.
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-- The limited_with clause does not impose a semantic dependence on P,
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-- and it is possible for two packages to have limited_with_clauses on
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-- each other without creating an elaboration circularity.
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-- To support this feature, the analysis of a limited_with clause must
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-- create an abbreviated view of the package, without performing any
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-- semantic analysis on it. This "package abstract" contains shadow
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-- types that are in one-one correspondence with the real types in the
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-- package, and that have the properties of incomplete types.
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-- The implementation creates two element lists: one to chain the shadow
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-- entities, and one to chain the corresponding type entities in the tree
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-- of the package. Links between corresponding entities in both chains
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-- allow the compiler to select the proper view of a given type, depending
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-- on the context. Note that in contrast with the handling of private
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-- types, the limited view and the non-limited view of a type are treated
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-- as separate entities, and no entity exchange needs to take place, which
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-- makes the implementation must simpler than could be feared.
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------------------------------
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-- Analyze_Compilation_Unit --
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------------------------------
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procedure Analyze_Compilation_Unit (N : Node_Id) is
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Unit_Node : constant Node_Id := Unit (N);
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Lib_Unit : Node_Id := Library_Unit (N);
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Spec_Id : Entity_Id;
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Main_Cunit : constant Node_Id := Cunit (Main_Unit);
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Par_Spec_Name : Unit_Name_Type;
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Unum : Unit_Number_Type;
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procedure Check_Redundant_Withs
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(Context_Items : List_Id;
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Spec_Context_Items : List_Id := No_List);
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-- Determine whether the context list of a compilation unit contains
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-- redundant with clauses. When checking body clauses against spec
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-- clauses, set Context_Items to the context list of the body and
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-- Spec_Context_Items to that of the spec. Parent packages are not
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-- examined for documentation purposes.
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procedure Generate_Parent_References (N : Node_Id; P_Id : Entity_Id);
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-- Generate cross-reference information for the parents of child units.
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-- N is a defining_program_unit_name, and P_Id is the immediate parent.
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---------------------------
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-- Check_Redundant_Withs --
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---------------------------
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procedure Check_Redundant_Withs
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(Context_Items : List_Id;
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Spec_Context_Items : List_Id := No_List)
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is
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Clause : Node_Id;
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procedure Process_Body_Clauses
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(Context_List : List_Id;
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Clause : Node_Id;
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Used : in out Boolean;
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Used_Type_Or_Elab : in out Boolean);
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-- Examine the context clauses of a package body, trying to match
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-- the name entity of Clause with any list element. If the match
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-- occurs on a use package clause, set Used to True, for a use
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-- type clause, pragma Elaborate or pragma Elaborate_All, set
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-- Used_Type_Or_Elab to True.
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procedure Process_Spec_Clauses
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(Context_List : List_Id;
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Clause : Node_Id;
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Used : in out Boolean;
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Withed : in out Boolean;
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Exit_On_Self : Boolean := False);
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-- Examine the context clauses of a package spec, trying to match
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-- the name entity of Clause with any list element. If the match
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-- occurs on a use package clause, set Used to True, for a with
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-- package clause other than Clause, set Withed to True. Limited
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-- with clauses, implicitly generated with clauses and withs
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-- having pragmas Elaborate or Elaborate_All applied to them are
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-- skipped. Exit_On_Self is used to control the search loop and
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-- force an exit whenever Clause sees itself in the search.
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--------------------------
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-- Process_Body_Clauses --
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--------------------------
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procedure Process_Body_Clauses
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(Context_List : List_Id;
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Clause : Node_Id;
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Used : in out Boolean;
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Used_Type_Or_Elab : in out Boolean)
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is
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Nam_Ent : constant Entity_Id := Entity (Name (Clause));
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Cont_Item : Node_Id;
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Prag_Unit : Node_Id;
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Subt_Mark : Node_Id;
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Use_Item : Node_Id;
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function Same_Unit (N : Node_Id; P : Entity_Id) return Boolean;
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-- In an expanded name in a use clause, if the prefix is a
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-- renamed package, the entity is set to the original package
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-- as a result, when checking whether the package appears in a
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-- previous with_clause, the renaming has to be taken into
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-- account, to prevent spurious or incorrect warnings. The
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-- common case is the use of Text_IO.
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---------------
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-- Same_Unit --
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---------------
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function Same_Unit (N : Node_Id; P : Entity_Id) return Boolean is
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begin
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return Entity (N) = P
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or else
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(Present (Renamed_Object (P))
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|
|
and then Entity (N) = Renamed_Object (P));
|
330 |
|
|
end Same_Unit;
|
331 |
|
|
|
332 |
|
|
-- Start of processing for Process_Body_Clauses
|
333 |
|
|
|
334 |
|
|
begin
|
335 |
|
|
Used := False;
|
336 |
|
|
Used_Type_Or_Elab := False;
|
337 |
|
|
|
338 |
|
|
Cont_Item := First (Context_List);
|
339 |
|
|
while Present (Cont_Item) loop
|
340 |
|
|
|
341 |
|
|
-- Package use clause
|
342 |
|
|
|
343 |
|
|
if Nkind (Cont_Item) = N_Use_Package_Clause
|
344 |
|
|
and then not Used
|
345 |
|
|
then
|
346 |
|
|
-- Search through use clauses
|
347 |
|
|
|
348 |
|
|
Use_Item := First (Names (Cont_Item));
|
349 |
|
|
while Present (Use_Item) and then not Used loop
|
350 |
|
|
|
351 |
|
|
-- Case of a direct use of the one we are looking for
|
352 |
|
|
|
353 |
|
|
if Entity (Use_Item) = Nam_Ent then
|
354 |
|
|
Used := True;
|
355 |
|
|
|
356 |
|
|
-- Handle nested case, as in "with P; use P.Q.R"
|
357 |
|
|
|
358 |
|
|
else
|
359 |
|
|
declare
|
360 |
|
|
UE : Node_Id;
|
361 |
|
|
|
362 |
|
|
begin
|
363 |
|
|
-- Loop through prefixes looking for match
|
364 |
|
|
|
365 |
|
|
UE := Use_Item;
|
366 |
|
|
while Nkind (UE) = N_Expanded_Name loop
|
367 |
|
|
if Same_Unit (Prefix (UE), Nam_Ent) then
|
368 |
|
|
Used := True;
|
369 |
|
|
exit;
|
370 |
|
|
end if;
|
371 |
|
|
|
372 |
|
|
UE := Prefix (UE);
|
373 |
|
|
end loop;
|
374 |
|
|
end;
|
375 |
|
|
end if;
|
376 |
|
|
|
377 |
|
|
Next (Use_Item);
|
378 |
|
|
end loop;
|
379 |
|
|
|
380 |
|
|
-- USE TYPE clause
|
381 |
|
|
|
382 |
|
|
elsif Nkind (Cont_Item) = N_Use_Type_Clause
|
383 |
|
|
and then not Used_Type_Or_Elab
|
384 |
|
|
then
|
385 |
|
|
Subt_Mark := First (Subtype_Marks (Cont_Item));
|
386 |
|
|
while Present (Subt_Mark)
|
387 |
|
|
and then not Used_Type_Or_Elab
|
388 |
|
|
loop
|
389 |
|
|
if Same_Unit (Prefix (Subt_Mark), Nam_Ent) then
|
390 |
|
|
Used_Type_Or_Elab := True;
|
391 |
|
|
end if;
|
392 |
|
|
|
393 |
|
|
Next (Subt_Mark);
|
394 |
|
|
end loop;
|
395 |
|
|
|
396 |
|
|
-- Pragma Elaborate or Elaborate_All
|
397 |
|
|
|
398 |
|
|
elsif Nkind (Cont_Item) = N_Pragma
|
399 |
|
|
and then
|
400 |
|
|
(Pragma_Name (Cont_Item) = Name_Elaborate
|
401 |
|
|
or else
|
402 |
|
|
Pragma_Name (Cont_Item) = Name_Elaborate_All)
|
403 |
|
|
and then not Used_Type_Or_Elab
|
404 |
|
|
then
|
405 |
|
|
Prag_Unit :=
|
406 |
|
|
First (Pragma_Argument_Associations (Cont_Item));
|
407 |
|
|
while Present (Prag_Unit)
|
408 |
|
|
and then not Used_Type_Or_Elab
|
409 |
|
|
loop
|
410 |
|
|
if Entity (Expression (Prag_Unit)) = Nam_Ent then
|
411 |
|
|
Used_Type_Or_Elab := True;
|
412 |
|
|
end if;
|
413 |
|
|
|
414 |
|
|
Next (Prag_Unit);
|
415 |
|
|
end loop;
|
416 |
|
|
end if;
|
417 |
|
|
|
418 |
|
|
Next (Cont_Item);
|
419 |
|
|
end loop;
|
420 |
|
|
end Process_Body_Clauses;
|
421 |
|
|
|
422 |
|
|
--------------------------
|
423 |
|
|
-- Process_Spec_Clauses --
|
424 |
|
|
--------------------------
|
425 |
|
|
|
426 |
|
|
procedure Process_Spec_Clauses
|
427 |
|
|
(Context_List : List_Id;
|
428 |
|
|
Clause : Node_Id;
|
429 |
|
|
Used : in out Boolean;
|
430 |
|
|
Withed : in out Boolean;
|
431 |
|
|
Exit_On_Self : Boolean := False)
|
432 |
|
|
is
|
433 |
|
|
Nam_Ent : constant Entity_Id := Entity (Name (Clause));
|
434 |
|
|
Cont_Item : Node_Id;
|
435 |
|
|
Use_Item : Node_Id;
|
436 |
|
|
|
437 |
|
|
begin
|
438 |
|
|
Used := False;
|
439 |
|
|
Withed := False;
|
440 |
|
|
|
441 |
|
|
Cont_Item := First (Context_List);
|
442 |
|
|
while Present (Cont_Item) loop
|
443 |
|
|
|
444 |
|
|
-- Stop the search since the context items after Cont_Item
|
445 |
|
|
-- have already been examined in a previous iteration of
|
446 |
|
|
-- the reverse loop in Check_Redundant_Withs.
|
447 |
|
|
|
448 |
|
|
if Exit_On_Self
|
449 |
|
|
and Cont_Item = Clause
|
450 |
|
|
then
|
451 |
|
|
exit;
|
452 |
|
|
end if;
|
453 |
|
|
|
454 |
|
|
-- Package use clause
|
455 |
|
|
|
456 |
|
|
if Nkind (Cont_Item) = N_Use_Package_Clause
|
457 |
|
|
and then not Used
|
458 |
|
|
then
|
459 |
|
|
Use_Item := First (Names (Cont_Item));
|
460 |
|
|
while Present (Use_Item) and then not Used loop
|
461 |
|
|
if Entity (Use_Item) = Nam_Ent then
|
462 |
|
|
Used := True;
|
463 |
|
|
end if;
|
464 |
|
|
|
465 |
|
|
Next (Use_Item);
|
466 |
|
|
end loop;
|
467 |
|
|
|
468 |
|
|
-- Package with clause. Avoid processing self, implicitly
|
469 |
|
|
-- generated with clauses or limited with clauses. Note
|
470 |
|
|
-- that we examine with clauses having pragmas Elaborate
|
471 |
|
|
-- or Elaborate_All applied to them due to cases such as:
|
472 |
|
|
--
|
473 |
|
|
-- with Pack;
|
474 |
|
|
-- with Pack;
|
475 |
|
|
-- pragma Elaborate (Pack);
|
476 |
|
|
--
|
477 |
|
|
-- In this case, the second with clause is redundant since
|
478 |
|
|
-- the pragma applies only to the first "with Pack;".
|
479 |
|
|
|
480 |
|
|
elsif Nkind (Cont_Item) = N_With_Clause
|
481 |
|
|
and then not Implicit_With (Cont_Item)
|
482 |
|
|
and then not Limited_Present (Cont_Item)
|
483 |
|
|
and then Cont_Item /= Clause
|
484 |
|
|
and then Entity (Name (Cont_Item)) = Nam_Ent
|
485 |
|
|
then
|
486 |
|
|
Withed := True;
|
487 |
|
|
end if;
|
488 |
|
|
|
489 |
|
|
Next (Cont_Item);
|
490 |
|
|
end loop;
|
491 |
|
|
end Process_Spec_Clauses;
|
492 |
|
|
|
493 |
|
|
-- Start of processing for Check_Redundant_Withs
|
494 |
|
|
|
495 |
|
|
begin
|
496 |
|
|
Clause := Last (Context_Items);
|
497 |
|
|
while Present (Clause) loop
|
498 |
|
|
|
499 |
|
|
-- Avoid checking implicitly generated with clauses, limited
|
500 |
|
|
-- with clauses or withs that have pragma Elaborate or
|
501 |
|
|
-- Elaborate_All applied.
|
502 |
|
|
|
503 |
|
|
if Nkind (Clause) = N_With_Clause
|
504 |
|
|
and then not Implicit_With (Clause)
|
505 |
|
|
and then not Limited_Present (Clause)
|
506 |
|
|
and then not Elaborate_Present (Clause)
|
507 |
|
|
then
|
508 |
|
|
-- Package body-to-spec check
|
509 |
|
|
|
510 |
|
|
if Present (Spec_Context_Items) then
|
511 |
|
|
declare
|
512 |
|
|
Used_In_Body : Boolean := False;
|
513 |
|
|
Used_In_Spec : Boolean := False;
|
514 |
|
|
Used_Type_Or_Elab : Boolean := False;
|
515 |
|
|
Withed_In_Spec : Boolean := False;
|
516 |
|
|
|
517 |
|
|
begin
|
518 |
|
|
Process_Spec_Clauses
|
519 |
|
|
(Context_List => Spec_Context_Items,
|
520 |
|
|
Clause => Clause,
|
521 |
|
|
Used => Used_In_Spec,
|
522 |
|
|
Withed => Withed_In_Spec);
|
523 |
|
|
|
524 |
|
|
Process_Body_Clauses
|
525 |
|
|
(Context_List => Context_Items,
|
526 |
|
|
Clause => Clause,
|
527 |
|
|
Used => Used_In_Body,
|
528 |
|
|
Used_Type_Or_Elab => Used_Type_Or_Elab);
|
529 |
|
|
|
530 |
|
|
-- "Type Elab" refers to the presence of either a use
|
531 |
|
|
-- type clause, pragmas Elaborate or Elaborate_All.
|
532 |
|
|
|
533 |
|
|
-- +---------------+---------------------------+------+
|
534 |
|
|
-- | Spec | Body | Warn |
|
535 |
|
|
-- +--------+------+--------+------+-----------+------+
|
536 |
|
|
-- | Withed | Used | Withed | Used | Type Elab | |
|
537 |
|
|
-- | X | | X | | | X |
|
538 |
|
|
-- | X | | X | X | | |
|
539 |
|
|
-- | X | | X | | X | |
|
540 |
|
|
-- | X | | X | X | X | |
|
541 |
|
|
-- | X | X | X | | | X |
|
542 |
|
|
-- | X | X | X | | X | |
|
543 |
|
|
-- | X | X | X | X | | X |
|
544 |
|
|
-- | X | X | X | X | X | |
|
545 |
|
|
-- +--------+------+--------+------+-----------+------+
|
546 |
|
|
|
547 |
|
|
if (Withed_In_Spec
|
548 |
|
|
and then not Used_Type_Or_Elab)
|
549 |
|
|
and then
|
550 |
|
|
((not Used_In_Spec
|
551 |
|
|
and then not Used_In_Body)
|
552 |
|
|
or else
|
553 |
|
|
Used_In_Spec)
|
554 |
|
|
then
|
555 |
|
|
Error_Msg_N ("?redundant with clause in body", Clause);
|
556 |
|
|
end if;
|
557 |
|
|
|
558 |
|
|
Used_In_Body := False;
|
559 |
|
|
Used_In_Spec := False;
|
560 |
|
|
Used_Type_Or_Elab := False;
|
561 |
|
|
Withed_In_Spec := False;
|
562 |
|
|
end;
|
563 |
|
|
|
564 |
|
|
-- Standalone package spec or body check
|
565 |
|
|
|
566 |
|
|
else
|
567 |
|
|
declare
|
568 |
|
|
Dont_Care : Boolean := False;
|
569 |
|
|
Withed : Boolean := False;
|
570 |
|
|
|
571 |
|
|
begin
|
572 |
|
|
-- The mechanism for examining the context clauses of a
|
573 |
|
|
-- package spec can be applied to package body clauses.
|
574 |
|
|
|
575 |
|
|
Process_Spec_Clauses
|
576 |
|
|
(Context_List => Context_Items,
|
577 |
|
|
Clause => Clause,
|
578 |
|
|
Used => Dont_Care,
|
579 |
|
|
Withed => Withed,
|
580 |
|
|
Exit_On_Self => True);
|
581 |
|
|
|
582 |
|
|
if Withed then
|
583 |
|
|
Error_Msg_N ("?redundant with clause", Clause);
|
584 |
|
|
end if;
|
585 |
|
|
end;
|
586 |
|
|
end if;
|
587 |
|
|
end if;
|
588 |
|
|
|
589 |
|
|
Prev (Clause);
|
590 |
|
|
end loop;
|
591 |
|
|
end Check_Redundant_Withs;
|
592 |
|
|
|
593 |
|
|
--------------------------------
|
594 |
|
|
-- Generate_Parent_References --
|
595 |
|
|
--------------------------------
|
596 |
|
|
|
597 |
|
|
procedure Generate_Parent_References (N : Node_Id; P_Id : Entity_Id) is
|
598 |
|
|
Pref : Node_Id;
|
599 |
|
|
P_Name : Entity_Id := P_Id;
|
600 |
|
|
|
601 |
|
|
begin
|
602 |
|
|
Pref := Name (Parent (Defining_Entity (N)));
|
603 |
|
|
|
604 |
|
|
if Nkind (Pref) = N_Expanded_Name then
|
605 |
|
|
|
606 |
|
|
-- Done already, if the unit has been compiled indirectly as
|
607 |
|
|
-- part of the closure of its context because of inlining.
|
608 |
|
|
|
609 |
|
|
return;
|
610 |
|
|
end if;
|
611 |
|
|
|
612 |
|
|
while Nkind (Pref) = N_Selected_Component loop
|
613 |
|
|
Change_Selected_Component_To_Expanded_Name (Pref);
|
614 |
|
|
Set_Entity (Pref, P_Name);
|
615 |
|
|
Set_Etype (Pref, Etype (P_Name));
|
616 |
|
|
Generate_Reference (P_Name, Pref, 'r');
|
617 |
|
|
Pref := Prefix (Pref);
|
618 |
|
|
P_Name := Scope (P_Name);
|
619 |
|
|
end loop;
|
620 |
|
|
|
621 |
|
|
-- The guard here on P_Name is to handle the error condition where
|
622 |
|
|
-- the parent unit is missing because the file was not found.
|
623 |
|
|
|
624 |
|
|
if Present (P_Name) then
|
625 |
|
|
Set_Entity (Pref, P_Name);
|
626 |
|
|
Set_Etype (Pref, Etype (P_Name));
|
627 |
|
|
Generate_Reference (P_Name, Pref, 'r');
|
628 |
|
|
Style.Check_Identifier (Pref, P_Name);
|
629 |
|
|
end if;
|
630 |
|
|
end Generate_Parent_References;
|
631 |
|
|
|
632 |
|
|
-- Start of processing for Analyze_Compilation_Unit
|
633 |
|
|
|
634 |
|
|
begin
|
635 |
|
|
Process_Compilation_Unit_Pragmas (N);
|
636 |
|
|
|
637 |
|
|
-- If the unit is a subunit whose parent has not been analyzed (which
|
638 |
|
|
-- indicates that the main unit is a subunit, either the current one or
|
639 |
|
|
-- one of its descendents) then the subunit is compiled as part of the
|
640 |
|
|
-- analysis of the parent, which we proceed to do. Basically this gets
|
641 |
|
|
-- handled from the top down and we don't want to do anything at this
|
642 |
|
|
-- level (i.e. this subunit will be handled on the way down from the
|
643 |
|
|
-- parent), so at this level we immediately return. If the subunit
|
644 |
|
|
-- ends up not analyzed, it means that the parent did not contain a
|
645 |
|
|
-- stub for it, or that there errors were detected in some ancestor.
|
646 |
|
|
|
647 |
|
|
if Nkind (Unit_Node) = N_Subunit
|
648 |
|
|
and then not Analyzed (Lib_Unit)
|
649 |
|
|
then
|
650 |
|
|
Semantics (Lib_Unit);
|
651 |
|
|
|
652 |
|
|
if not Analyzed (Proper_Body (Unit_Node)) then
|
653 |
|
|
if Serious_Errors_Detected > 0 then
|
654 |
|
|
Error_Msg_N ("subunit not analyzed (errors in parent unit)", N);
|
655 |
|
|
else
|
656 |
|
|
Error_Msg_N ("missing stub for subunit", N);
|
657 |
|
|
end if;
|
658 |
|
|
end if;
|
659 |
|
|
|
660 |
|
|
return;
|
661 |
|
|
end if;
|
662 |
|
|
|
663 |
|
|
-- Analyze context (this will call Sem recursively for with'ed units)
|
664 |
|
|
-- To detect circularities among with-clauses that are not caught during
|
665 |
|
|
-- loading, we set the Context_Pending flag on the current unit. If the
|
666 |
|
|
-- flag is already set there is a potential circularity.
|
667 |
|
|
-- We exclude predefined units from this check because they are known
|
668 |
|
|
-- to be safe. We also exclude package bodies that are present because
|
669 |
|
|
-- circularities between bodies are harmless (and necessary).
|
670 |
|
|
|
671 |
|
|
if Context_Pending (N) then
|
672 |
|
|
declare
|
673 |
|
|
Circularity : Boolean := True;
|
674 |
|
|
|
675 |
|
|
begin
|
676 |
|
|
if Is_Predefined_File_Name
|
677 |
|
|
(Unit_File_Name (Get_Source_Unit (Unit (N))))
|
678 |
|
|
then
|
679 |
|
|
Circularity := False;
|
680 |
|
|
|
681 |
|
|
else
|
682 |
|
|
for U in Main_Unit + 1 .. Last_Unit loop
|
683 |
|
|
if Nkind (Unit (Cunit (U))) = N_Package_Body
|
684 |
|
|
and then not Analyzed (Cunit (U))
|
685 |
|
|
then
|
686 |
|
|
Circularity := False;
|
687 |
|
|
exit;
|
688 |
|
|
end if;
|
689 |
|
|
end loop;
|
690 |
|
|
end if;
|
691 |
|
|
|
692 |
|
|
if Circularity then
|
693 |
|
|
Error_Msg_N
|
694 |
|
|
("circular dependency caused by with_clauses", N);
|
695 |
|
|
Error_Msg_N
|
696 |
|
|
("\possibly missing limited_with clause"
|
697 |
|
|
& " in one of the following", N);
|
698 |
|
|
|
699 |
|
|
for U in Main_Unit .. Last_Unit loop
|
700 |
|
|
if Context_Pending (Cunit (U)) then
|
701 |
|
|
Error_Msg_Unit_1 := Get_Unit_Name (Unit (Cunit (U)));
|
702 |
|
|
Error_Msg_N ("\unit$", N);
|
703 |
|
|
end if;
|
704 |
|
|
end loop;
|
705 |
|
|
|
706 |
|
|
raise Unrecoverable_Error;
|
707 |
|
|
end if;
|
708 |
|
|
end;
|
709 |
|
|
else
|
710 |
|
|
Set_Context_Pending (N);
|
711 |
|
|
end if;
|
712 |
|
|
|
713 |
|
|
Analyze_Context (N);
|
714 |
|
|
|
715 |
|
|
Set_Context_Pending (N, False);
|
716 |
|
|
|
717 |
|
|
-- If the unit is a package body, the spec is already loaded and must be
|
718 |
|
|
-- analyzed first, before we analyze the body.
|
719 |
|
|
|
720 |
|
|
if Nkind (Unit_Node) = N_Package_Body then
|
721 |
|
|
|
722 |
|
|
-- If no Lib_Unit, then there was a serious previous error, so just
|
723 |
|
|
-- ignore the entire analysis effort
|
724 |
|
|
|
725 |
|
|
if No (Lib_Unit) then
|
726 |
|
|
return;
|
727 |
|
|
|
728 |
|
|
else
|
729 |
|
|
Semantics (Lib_Unit);
|
730 |
|
|
Check_Unused_Withs (Get_Cunit_Unit_Number (Lib_Unit));
|
731 |
|
|
|
732 |
|
|
-- Verify that the library unit is a package declaration
|
733 |
|
|
|
734 |
|
|
if not Nkind_In (Unit (Lib_Unit), N_Package_Declaration,
|
735 |
|
|
N_Generic_Package_Declaration)
|
736 |
|
|
then
|
737 |
|
|
Error_Msg_N
|
738 |
|
|
("no legal package declaration for package body", N);
|
739 |
|
|
return;
|
740 |
|
|
|
741 |
|
|
-- Otherwise, the entity in the declaration is visible. Update the
|
742 |
|
|
-- version to reflect dependence of this body on the spec.
|
743 |
|
|
|
744 |
|
|
else
|
745 |
|
|
Spec_Id := Defining_Entity (Unit (Lib_Unit));
|
746 |
|
|
Set_Is_Immediately_Visible (Spec_Id, True);
|
747 |
|
|
Version_Update (N, Lib_Unit);
|
748 |
|
|
|
749 |
|
|
if Nkind (Defining_Unit_Name (Unit_Node)) =
|
750 |
|
|
N_Defining_Program_Unit_Name
|
751 |
|
|
then
|
752 |
|
|
Generate_Parent_References (Unit_Node, Scope (Spec_Id));
|
753 |
|
|
end if;
|
754 |
|
|
end if;
|
755 |
|
|
end if;
|
756 |
|
|
|
757 |
|
|
-- If the unit is a subprogram body, then we similarly need to analyze
|
758 |
|
|
-- its spec. However, things are a little simpler in this case, because
|
759 |
|
|
-- here, this analysis is done only for error checking and consistency
|
760 |
|
|
-- purposes, so there's nothing else to be done.
|
761 |
|
|
|
762 |
|
|
elsif Nkind (Unit_Node) = N_Subprogram_Body then
|
763 |
|
|
if Acts_As_Spec (N) then
|
764 |
|
|
|
765 |
|
|
-- If the subprogram body is a child unit, we must create a
|
766 |
|
|
-- declaration for it, in order to properly load the parent(s).
|
767 |
|
|
-- After this, the original unit does not acts as a spec, because
|
768 |
|
|
-- there is an explicit one. If this unit appears in a context
|
769 |
|
|
-- clause, then an implicit with on the parent will be added when
|
770 |
|
|
-- installing the context. If this is the main unit, there is no
|
771 |
|
|
-- Unit_Table entry for the declaration (it has the unit number
|
772 |
|
|
-- of the main unit) and code generation is unaffected.
|
773 |
|
|
|
774 |
|
|
Unum := Get_Cunit_Unit_Number (N);
|
775 |
|
|
Par_Spec_Name := Get_Parent_Spec_Name (Unit_Name (Unum));
|
776 |
|
|
|
777 |
|
|
if Par_Spec_Name /= No_Unit_Name then
|
778 |
|
|
Unum :=
|
779 |
|
|
Load_Unit
|
780 |
|
|
(Load_Name => Par_Spec_Name,
|
781 |
|
|
Required => True,
|
782 |
|
|
Subunit => False,
|
783 |
|
|
Error_Node => N);
|
784 |
|
|
|
785 |
|
|
if Unum /= No_Unit then
|
786 |
|
|
|
787 |
|
|
-- Build subprogram declaration and attach parent unit to it
|
788 |
|
|
-- This subprogram declaration does not come from source,
|
789 |
|
|
-- Nevertheless the backend must generate debugging info for
|
790 |
|
|
-- it, and this must be indicated explicitly. We also mark
|
791 |
|
|
-- the body entity as a child unit now, to prevent a
|
792 |
|
|
-- cascaded error if the spec entity cannot be entered
|
793 |
|
|
-- in its scope. Finally we create a Units table entry for
|
794 |
|
|
-- the subprogram declaration, to maintain a one-to-one
|
795 |
|
|
-- correspondence with compilation unit nodes. This is
|
796 |
|
|
-- critical for the tree traversals performed by CodePeer.
|
797 |
|
|
|
798 |
|
|
declare
|
799 |
|
|
Loc : constant Source_Ptr := Sloc (N);
|
800 |
|
|
SCS : constant Boolean :=
|
801 |
|
|
Get_Comes_From_Source_Default;
|
802 |
|
|
|
803 |
|
|
begin
|
804 |
|
|
Set_Comes_From_Source_Default (False);
|
805 |
|
|
Lib_Unit :=
|
806 |
|
|
Make_Compilation_Unit (Loc,
|
807 |
|
|
Context_Items => New_Copy_List (Context_Items (N)),
|
808 |
|
|
Unit =>
|
809 |
|
|
Make_Subprogram_Declaration (Sloc (N),
|
810 |
|
|
Specification =>
|
811 |
|
|
Copy_Separate_Tree
|
812 |
|
|
(Specification (Unit_Node))),
|
813 |
|
|
Aux_Decls_Node =>
|
814 |
|
|
Make_Compilation_Unit_Aux (Loc));
|
815 |
|
|
|
816 |
|
|
Set_Library_Unit (N, Lib_Unit);
|
817 |
|
|
Set_Parent_Spec (Unit (Lib_Unit), Cunit (Unum));
|
818 |
|
|
Make_Child_Decl_Unit (N);
|
819 |
|
|
Semantics (Lib_Unit);
|
820 |
|
|
|
821 |
|
|
-- Now that a separate declaration exists, the body
|
822 |
|
|
-- of the child unit does not act as spec any longer.
|
823 |
|
|
|
824 |
|
|
Set_Acts_As_Spec (N, False);
|
825 |
|
|
Set_Is_Child_Unit (Defining_Entity (Unit_Node));
|
826 |
|
|
Set_Debug_Info_Needed (Defining_Entity (Unit (Lib_Unit)));
|
827 |
|
|
Set_Comes_From_Source_Default (SCS);
|
828 |
|
|
end;
|
829 |
|
|
end if;
|
830 |
|
|
end if;
|
831 |
|
|
|
832 |
|
|
-- Here for subprogram with separate declaration
|
833 |
|
|
|
834 |
|
|
else
|
835 |
|
|
Semantics (Lib_Unit);
|
836 |
|
|
Check_Unused_Withs (Get_Cunit_Unit_Number (Lib_Unit));
|
837 |
|
|
Version_Update (N, Lib_Unit);
|
838 |
|
|
end if;
|
839 |
|
|
|
840 |
|
|
-- If this is a child unit, generate references to the parents
|
841 |
|
|
|
842 |
|
|
if Nkind (Defining_Unit_Name (Specification (Unit_Node))) =
|
843 |
|
|
N_Defining_Program_Unit_Name
|
844 |
|
|
then
|
845 |
|
|
Generate_Parent_References (
|
846 |
|
|
Specification (Unit_Node),
|
847 |
|
|
Scope (Defining_Entity (Unit (Lib_Unit))));
|
848 |
|
|
end if;
|
849 |
|
|
end if;
|
850 |
|
|
|
851 |
|
|
-- If it is a child unit, the parent must be elaborated first and we
|
852 |
|
|
-- update version, since we are dependent on our parent.
|
853 |
|
|
|
854 |
|
|
if Is_Child_Spec (Unit_Node) then
|
855 |
|
|
|
856 |
|
|
-- The analysis of the parent is done with style checks off
|
857 |
|
|
|
858 |
|
|
declare
|
859 |
|
|
Save_Style_Check : constant Boolean := Style_Check;
|
860 |
|
|
Save_C_Restrict : constant Save_Cunit_Boolean_Restrictions :=
|
861 |
|
|
Cunit_Boolean_Restrictions_Save;
|
862 |
|
|
|
863 |
|
|
begin
|
864 |
|
|
if not GNAT_Mode then
|
865 |
|
|
Style_Check := False;
|
866 |
|
|
end if;
|
867 |
|
|
|
868 |
|
|
Semantics (Parent_Spec (Unit_Node));
|
869 |
|
|
Version_Update (N, Parent_Spec (Unit_Node));
|
870 |
|
|
Style_Check := Save_Style_Check;
|
871 |
|
|
Cunit_Boolean_Restrictions_Restore (Save_C_Restrict);
|
872 |
|
|
end;
|
873 |
|
|
end if;
|
874 |
|
|
|
875 |
|
|
-- With the analysis done, install the context. Note that we can't
|
876 |
|
|
-- install the context from the with clauses as we analyze them, because
|
877 |
|
|
-- each with clause must be analyzed in a clean visibility context, so
|
878 |
|
|
-- we have to wait and install them all at once.
|
879 |
|
|
|
880 |
|
|
Install_Context (N);
|
881 |
|
|
|
882 |
|
|
if Is_Child_Spec (Unit_Node) then
|
883 |
|
|
|
884 |
|
|
-- Set the entities of all parents in the program_unit_name
|
885 |
|
|
|
886 |
|
|
Generate_Parent_References (
|
887 |
|
|
Unit_Node, Get_Parent_Entity (Unit (Parent_Spec (Unit_Node))));
|
888 |
|
|
end if;
|
889 |
|
|
|
890 |
|
|
-- All components of the context: with-clauses, library unit, ancestors
|
891 |
|
|
-- if any, (and their context) are analyzed and installed.
|
892 |
|
|
|
893 |
|
|
-- Call special debug routine sm if this is the main unit
|
894 |
|
|
|
895 |
|
|
if Current_Sem_Unit = Main_Unit then
|
896 |
|
|
sm;
|
897 |
|
|
end if;
|
898 |
|
|
|
899 |
|
|
-- Now analyze the unit (package, subprogram spec, body) itself
|
900 |
|
|
|
901 |
|
|
Analyze (Unit_Node);
|
902 |
|
|
|
903 |
|
|
if Warn_On_Redundant_Constructs then
|
904 |
|
|
Check_Redundant_Withs (Context_Items (N));
|
905 |
|
|
|
906 |
|
|
if Nkind (Unit_Node) = N_Package_Body then
|
907 |
|
|
Check_Redundant_Withs
|
908 |
|
|
(Context_Items => Context_Items (N),
|
909 |
|
|
Spec_Context_Items => Context_Items (Lib_Unit));
|
910 |
|
|
end if;
|
911 |
|
|
end if;
|
912 |
|
|
|
913 |
|
|
-- The above call might have made Unit_Node an N_Subprogram_Body from
|
914 |
|
|
-- something else, so propagate any Acts_As_Spec flag.
|
915 |
|
|
|
916 |
|
|
if Nkind (Unit_Node) = N_Subprogram_Body
|
917 |
|
|
and then Acts_As_Spec (Unit_Node)
|
918 |
|
|
then
|
919 |
|
|
Set_Acts_As_Spec (N);
|
920 |
|
|
end if;
|
921 |
|
|
|
922 |
|
|
-- Register predefined units in Rtsfind
|
923 |
|
|
|
924 |
|
|
declare
|
925 |
|
|
Unum : constant Unit_Number_Type := Get_Source_Unit (Sloc (N));
|
926 |
|
|
begin
|
927 |
|
|
if Is_Predefined_File_Name (Unit_File_Name (Unum)) then
|
928 |
|
|
Set_RTU_Loaded (Unit_Node);
|
929 |
|
|
end if;
|
930 |
|
|
end;
|
931 |
|
|
|
932 |
|
|
-- Treat compilation unit pragmas that appear after the library unit
|
933 |
|
|
|
934 |
|
|
if Present (Pragmas_After (Aux_Decls_Node (N))) then
|
935 |
|
|
declare
|
936 |
|
|
Prag_Node : Node_Id := First (Pragmas_After (Aux_Decls_Node (N)));
|
937 |
|
|
begin
|
938 |
|
|
while Present (Prag_Node) loop
|
939 |
|
|
Analyze (Prag_Node);
|
940 |
|
|
Next (Prag_Node);
|
941 |
|
|
end loop;
|
942 |
|
|
end;
|
943 |
|
|
end if;
|
944 |
|
|
|
945 |
|
|
-- Generate distribution stubs if requested and no error
|
946 |
|
|
|
947 |
|
|
if N = Main_Cunit
|
948 |
|
|
and then (Distribution_Stub_Mode = Generate_Receiver_Stub_Body
|
949 |
|
|
or else
|
950 |
|
|
Distribution_Stub_Mode = Generate_Caller_Stub_Body)
|
951 |
|
|
and then not Fatal_Error (Main_Unit)
|
952 |
|
|
then
|
953 |
|
|
if Is_RCI_Pkg_Spec_Or_Body (N) then
|
954 |
|
|
|
955 |
|
|
-- Regular RCI package
|
956 |
|
|
|
957 |
|
|
Add_Stub_Constructs (N);
|
958 |
|
|
|
959 |
|
|
elsif (Nkind (Unit_Node) = N_Package_Declaration
|
960 |
|
|
and then Is_Shared_Passive (Defining_Entity
|
961 |
|
|
(Specification (Unit_Node))))
|
962 |
|
|
or else (Nkind (Unit_Node) = N_Package_Body
|
963 |
|
|
and then
|
964 |
|
|
Is_Shared_Passive (Corresponding_Spec (Unit_Node)))
|
965 |
|
|
then
|
966 |
|
|
-- Shared passive package
|
967 |
|
|
|
968 |
|
|
Add_Stub_Constructs (N);
|
969 |
|
|
|
970 |
|
|
elsif Nkind (Unit_Node) = N_Package_Instantiation
|
971 |
|
|
and then
|
972 |
|
|
Is_Remote_Call_Interface
|
973 |
|
|
(Defining_Entity (Specification (Instance_Spec (Unit_Node))))
|
974 |
|
|
then
|
975 |
|
|
-- Instantiation of a RCI generic package
|
976 |
|
|
|
977 |
|
|
Add_Stub_Constructs (N);
|
978 |
|
|
end if;
|
979 |
|
|
end if;
|
980 |
|
|
|
981 |
|
|
-- Remove unit from visibility, so that environment is clean for
|
982 |
|
|
-- the next compilation, which is either the main unit or some
|
983 |
|
|
-- other unit in the context.
|
984 |
|
|
|
985 |
|
|
if Nkind_In (Unit_Node, N_Package_Declaration,
|
986 |
|
|
N_Package_Renaming_Declaration,
|
987 |
|
|
N_Subprogram_Declaration)
|
988 |
|
|
or else Nkind (Unit_Node) in N_Generic_Declaration
|
989 |
|
|
or else
|
990 |
|
|
(Nkind (Unit_Node) = N_Subprogram_Body
|
991 |
|
|
and then Acts_As_Spec (Unit_Node))
|
992 |
|
|
then
|
993 |
|
|
Remove_Unit_From_Visibility (Defining_Entity (Unit_Node));
|
994 |
|
|
|
995 |
|
|
-- If the unit is an instantiation whose body will be elaborated for
|
996 |
|
|
-- inlining purposes, use the proper entity of the instance. The
|
997 |
|
|
-- entity may be missing if the instantiation was illegal.
|
998 |
|
|
|
999 |
|
|
elsif Nkind (Unit_Node) = N_Package_Instantiation
|
1000 |
|
|
and then not Error_Posted (Unit_Node)
|
1001 |
|
|
and then Present (Instance_Spec (Unit_Node))
|
1002 |
|
|
then
|
1003 |
|
|
Remove_Unit_From_Visibility
|
1004 |
|
|
(Defining_Entity (Instance_Spec (Unit_Node)));
|
1005 |
|
|
|
1006 |
|
|
elsif Nkind (Unit_Node) = N_Package_Body
|
1007 |
|
|
or else (Nkind (Unit_Node) = N_Subprogram_Body
|
1008 |
|
|
and then not Acts_As_Spec (Unit_Node))
|
1009 |
|
|
then
|
1010 |
|
|
-- Bodies that are not the main unit are compiled if they are generic
|
1011 |
|
|
-- or contain generic or inlined units. Their analysis brings in the
|
1012 |
|
|
-- context of the corresponding spec (unit declaration) which must be
|
1013 |
|
|
-- removed as well, to return the compilation environment to its
|
1014 |
|
|
-- proper state.
|
1015 |
|
|
|
1016 |
|
|
Remove_Context (Lib_Unit);
|
1017 |
|
|
Set_Is_Immediately_Visible (Defining_Entity (Unit (Lib_Unit)), False);
|
1018 |
|
|
end if;
|
1019 |
|
|
|
1020 |
|
|
-- Last step is to deinstall the context we just installed as well as
|
1021 |
|
|
-- the unit just compiled.
|
1022 |
|
|
|
1023 |
|
|
Remove_Context (N);
|
1024 |
|
|
|
1025 |
|
|
-- If this is the main unit and we are generating code, we must check
|
1026 |
|
|
-- that all generic units in the context have a body if they need it,
|
1027 |
|
|
-- even if they have not been instantiated. In the absence of .ali files
|
1028 |
|
|
-- for generic units, we must force the load of the body, just to
|
1029 |
|
|
-- produce the proper error if the body is absent. We skip this
|
1030 |
|
|
-- verification if the main unit itself is generic.
|
1031 |
|
|
|
1032 |
|
|
if Get_Cunit_Unit_Number (N) = Main_Unit
|
1033 |
|
|
and then Operating_Mode = Generate_Code
|
1034 |
|
|
and then Expander_Active
|
1035 |
|
|
then
|
1036 |
|
|
-- Check whether the source for the body of the unit must be included
|
1037 |
|
|
-- in a standalone library.
|
1038 |
|
|
|
1039 |
|
|
Check_Body_Needed_For_SAL (Cunit_Entity (Main_Unit));
|
1040 |
|
|
|
1041 |
|
|
-- Indicate that the main unit is now analyzed, to catch possible
|
1042 |
|
|
-- circularities between it and generic bodies. Remove main unit from
|
1043 |
|
|
-- visibility. This might seem superfluous, but the main unit must
|
1044 |
|
|
-- not be visible in the generic body expansions that follow.
|
1045 |
|
|
|
1046 |
|
|
Set_Analyzed (N, True);
|
1047 |
|
|
Set_Is_Immediately_Visible (Cunit_Entity (Main_Unit), False);
|
1048 |
|
|
|
1049 |
|
|
declare
|
1050 |
|
|
Item : Node_Id;
|
1051 |
|
|
Nam : Entity_Id;
|
1052 |
|
|
Un : Unit_Number_Type;
|
1053 |
|
|
|
1054 |
|
|
Save_Style_Check : constant Boolean := Style_Check;
|
1055 |
|
|
Save_C_Restrict : constant Save_Cunit_Boolean_Restrictions :=
|
1056 |
|
|
Cunit_Boolean_Restrictions_Save;
|
1057 |
|
|
|
1058 |
|
|
begin
|
1059 |
|
|
Item := First (Context_Items (N));
|
1060 |
|
|
while Present (Item) loop
|
1061 |
|
|
|
1062 |
|
|
-- Check for explicit with clause
|
1063 |
|
|
|
1064 |
|
|
if Nkind (Item) = N_With_Clause
|
1065 |
|
|
and then not Implicit_With (Item)
|
1066 |
|
|
|
1067 |
|
|
-- Ada 2005 (AI-50217): Ignore limited-withed units
|
1068 |
|
|
|
1069 |
|
|
and then not Limited_Present (Item)
|
1070 |
|
|
then
|
1071 |
|
|
Nam := Entity (Name (Item));
|
1072 |
|
|
|
1073 |
|
|
-- Compile generic subprogram, unless it is intrinsic or
|
1074 |
|
|
-- imported so no body is required, or generic package body
|
1075 |
|
|
-- if the package spec requires a body.
|
1076 |
|
|
|
1077 |
|
|
if (Is_Generic_Subprogram (Nam)
|
1078 |
|
|
and then not Is_Intrinsic_Subprogram (Nam)
|
1079 |
|
|
and then not Is_Imported (Nam))
|
1080 |
|
|
or else (Ekind (Nam) = E_Generic_Package
|
1081 |
|
|
and then Unit_Requires_Body (Nam))
|
1082 |
|
|
then
|
1083 |
|
|
Style_Check := False;
|
1084 |
|
|
|
1085 |
|
|
if Present (Renamed_Object (Nam)) then
|
1086 |
|
|
Un :=
|
1087 |
|
|
Load_Unit
|
1088 |
|
|
(Load_Name => Get_Body_Name
|
1089 |
|
|
(Get_Unit_Name
|
1090 |
|
|
(Unit_Declaration_Node
|
1091 |
|
|
(Renamed_Object (Nam)))),
|
1092 |
|
|
Required => False,
|
1093 |
|
|
Subunit => False,
|
1094 |
|
|
Error_Node => N,
|
1095 |
|
|
Renamings => True);
|
1096 |
|
|
else
|
1097 |
|
|
Un :=
|
1098 |
|
|
Load_Unit
|
1099 |
|
|
(Load_Name => Get_Body_Name
|
1100 |
|
|
(Get_Unit_Name (Item)),
|
1101 |
|
|
Required => False,
|
1102 |
|
|
Subunit => False,
|
1103 |
|
|
Error_Node => N,
|
1104 |
|
|
Renamings => True);
|
1105 |
|
|
end if;
|
1106 |
|
|
|
1107 |
|
|
if Un = No_Unit then
|
1108 |
|
|
Error_Msg_NE
|
1109 |
|
|
("body of generic unit& not found", Item, Nam);
|
1110 |
|
|
exit;
|
1111 |
|
|
|
1112 |
|
|
elsif not Analyzed (Cunit (Un))
|
1113 |
|
|
and then Un /= Main_Unit
|
1114 |
|
|
and then not Fatal_Error (Un)
|
1115 |
|
|
then
|
1116 |
|
|
Style_Check := False;
|
1117 |
|
|
Semantics (Cunit (Un));
|
1118 |
|
|
end if;
|
1119 |
|
|
end if;
|
1120 |
|
|
end if;
|
1121 |
|
|
|
1122 |
|
|
Next (Item);
|
1123 |
|
|
end loop;
|
1124 |
|
|
|
1125 |
|
|
Style_Check := Save_Style_Check;
|
1126 |
|
|
Cunit_Boolean_Restrictions_Restore (Save_C_Restrict);
|
1127 |
|
|
end;
|
1128 |
|
|
end if;
|
1129 |
|
|
|
1130 |
|
|
-- Deal with creating elaboration Boolean if needed. We create an
|
1131 |
|
|
-- elaboration boolean only for units that come from source since
|
1132 |
|
|
-- units manufactured by the compiler never need elab checks.
|
1133 |
|
|
|
1134 |
|
|
if Comes_From_Source (N)
|
1135 |
|
|
and then Nkind_In (Unit_Node, N_Package_Declaration,
|
1136 |
|
|
N_Generic_Package_Declaration,
|
1137 |
|
|
N_Subprogram_Declaration,
|
1138 |
|
|
N_Generic_Subprogram_Declaration)
|
1139 |
|
|
then
|
1140 |
|
|
declare
|
1141 |
|
|
Loc : constant Source_Ptr := Sloc (N);
|
1142 |
|
|
Unum : constant Unit_Number_Type := Get_Source_Unit (Loc);
|
1143 |
|
|
|
1144 |
|
|
begin
|
1145 |
|
|
Spec_Id := Defining_Entity (Unit_Node);
|
1146 |
|
|
Generate_Definition (Spec_Id);
|
1147 |
|
|
|
1148 |
|
|
-- See if an elaboration entity is required for possible access
|
1149 |
|
|
-- before elaboration checking. Note that we must allow for this
|
1150 |
|
|
-- even if -gnatE is not set, since a client may be compiled in
|
1151 |
|
|
-- -gnatE mode and reference the entity.
|
1152 |
|
|
|
1153 |
|
|
-- These entities are also used by the binder to prevent multiple
|
1154 |
|
|
-- attempts to execute the elaboration code for the library case
|
1155 |
|
|
-- where the elaboration routine might otherwise be called more
|
1156 |
|
|
-- than once.
|
1157 |
|
|
|
1158 |
|
|
-- Case of units which do not require elaboration checks
|
1159 |
|
|
|
1160 |
|
|
if
|
1161 |
|
|
-- Pure units do not need checks
|
1162 |
|
|
|
1163 |
|
|
Is_Pure (Spec_Id)
|
1164 |
|
|
|
1165 |
|
|
-- Preelaborated units do not need checks
|
1166 |
|
|
|
1167 |
|
|
or else Is_Preelaborated (Spec_Id)
|
1168 |
|
|
|
1169 |
|
|
-- No checks needed if pragma Elaborate_Body present
|
1170 |
|
|
|
1171 |
|
|
or else Has_Pragma_Elaborate_Body (Spec_Id)
|
1172 |
|
|
|
1173 |
|
|
-- No checks needed if unit does not require a body
|
1174 |
|
|
|
1175 |
|
|
or else not Unit_Requires_Body (Spec_Id)
|
1176 |
|
|
|
1177 |
|
|
-- No checks needed for predefined files
|
1178 |
|
|
|
1179 |
|
|
or else Is_Predefined_File_Name (Unit_File_Name (Unum))
|
1180 |
|
|
|
1181 |
|
|
-- No checks required if no separate spec
|
1182 |
|
|
|
1183 |
|
|
or else Acts_As_Spec (N)
|
1184 |
|
|
then
|
1185 |
|
|
-- This is a case where we only need the entity for
|
1186 |
|
|
-- checking to prevent multiple elaboration checks.
|
1187 |
|
|
|
1188 |
|
|
Set_Elaboration_Entity_Required (Spec_Id, False);
|
1189 |
|
|
|
1190 |
|
|
-- Case of elaboration entity is required for access before
|
1191 |
|
|
-- elaboration checking (so certainly we must build it!)
|
1192 |
|
|
|
1193 |
|
|
else
|
1194 |
|
|
Set_Elaboration_Entity_Required (Spec_Id, True);
|
1195 |
|
|
end if;
|
1196 |
|
|
|
1197 |
|
|
Build_Elaboration_Entity (N, Spec_Id);
|
1198 |
|
|
end;
|
1199 |
|
|
end if;
|
1200 |
|
|
|
1201 |
|
|
-- Freeze the compilation unit entity. This for sure is needed because
|
1202 |
|
|
-- of some warnings that can be output (see Freeze_Subprogram), but may
|
1203 |
|
|
-- in general be required. If freezing actions result, place them in the
|
1204 |
|
|
-- compilation unit actions list, and analyze them.
|
1205 |
|
|
|
1206 |
|
|
declare
|
1207 |
|
|
Loc : constant Source_Ptr := Sloc (N);
|
1208 |
|
|
L : constant List_Id :=
|
1209 |
|
|
Freeze_Entity (Cunit_Entity (Current_Sem_Unit), Loc);
|
1210 |
|
|
begin
|
1211 |
|
|
while Is_Non_Empty_List (L) loop
|
1212 |
|
|
Insert_Library_Level_Action (Remove_Head (L));
|
1213 |
|
|
end loop;
|
1214 |
|
|
end;
|
1215 |
|
|
|
1216 |
|
|
Set_Analyzed (N);
|
1217 |
|
|
|
1218 |
|
|
if Nkind (Unit_Node) = N_Package_Declaration
|
1219 |
|
|
and then Get_Cunit_Unit_Number (N) /= Main_Unit
|
1220 |
|
|
and then Expander_Active
|
1221 |
|
|
then
|
1222 |
|
|
declare
|
1223 |
|
|
Save_Style_Check : constant Boolean := Style_Check;
|
1224 |
|
|
Save_Warning : constant Warning_Mode_Type := Warning_Mode;
|
1225 |
|
|
Options : Style_Check_Options;
|
1226 |
|
|
|
1227 |
|
|
begin
|
1228 |
|
|
Save_Style_Check_Options (Options);
|
1229 |
|
|
Reset_Style_Check_Options;
|
1230 |
|
|
Opt.Warning_Mode := Suppress;
|
1231 |
|
|
Check_Body_For_Inlining (N, Defining_Entity (Unit_Node));
|
1232 |
|
|
|
1233 |
|
|
Reset_Style_Check_Options;
|
1234 |
|
|
Set_Style_Check_Options (Options);
|
1235 |
|
|
Style_Check := Save_Style_Check;
|
1236 |
|
|
Warning_Mode := Save_Warning;
|
1237 |
|
|
end;
|
1238 |
|
|
end if;
|
1239 |
|
|
|
1240 |
|
|
-- If we are generating obsolescent warnings, then here is where we
|
1241 |
|
|
-- generate them for the with'ed items. The reason for this special
|
1242 |
|
|
-- processing is that the normal mechanism of generating the warnings
|
1243 |
|
|
-- for referenced entities does not work for context clause references.
|
1244 |
|
|
-- That's because when we first analyze the context, it is too early to
|
1245 |
|
|
-- know if the with'ing unit is itself obsolescent (which suppresses
|
1246 |
|
|
-- the warnings).
|
1247 |
|
|
|
1248 |
|
|
if not GNAT_Mode and then Warn_On_Obsolescent_Feature then
|
1249 |
|
|
|
1250 |
|
|
-- Push current compilation unit as scope, so that the test for
|
1251 |
|
|
-- being within an obsolescent unit will work correctly.
|
1252 |
|
|
|
1253 |
|
|
Push_Scope (Defining_Entity (Unit_Node));
|
1254 |
|
|
|
1255 |
|
|
-- Loop through context items to deal with with clauses
|
1256 |
|
|
|
1257 |
|
|
declare
|
1258 |
|
|
Item : Node_Id;
|
1259 |
|
|
Nam : Node_Id;
|
1260 |
|
|
Ent : Entity_Id;
|
1261 |
|
|
|
1262 |
|
|
begin
|
1263 |
|
|
Item := First (Context_Items (N));
|
1264 |
|
|
while Present (Item) loop
|
1265 |
|
|
if Nkind (Item) = N_With_Clause
|
1266 |
|
|
|
1267 |
|
|
-- Suppress this check in limited-withed units. Further work
|
1268 |
|
|
-- needed here if we decide to incorporate this check on
|
1269 |
|
|
-- limited-withed units.
|
1270 |
|
|
|
1271 |
|
|
and then not Limited_Present (Item)
|
1272 |
|
|
then
|
1273 |
|
|
Nam := Name (Item);
|
1274 |
|
|
Ent := Entity (Nam);
|
1275 |
|
|
|
1276 |
|
|
if Is_Obsolescent (Ent) then
|
1277 |
|
|
Output_Obsolescent_Entity_Warnings (Nam, Ent);
|
1278 |
|
|
end if;
|
1279 |
|
|
end if;
|
1280 |
|
|
|
1281 |
|
|
Next (Item);
|
1282 |
|
|
end loop;
|
1283 |
|
|
end;
|
1284 |
|
|
|
1285 |
|
|
-- Remove temporary install of current unit as scope
|
1286 |
|
|
|
1287 |
|
|
Pop_Scope;
|
1288 |
|
|
end if;
|
1289 |
|
|
end Analyze_Compilation_Unit;
|
1290 |
|
|
|
1291 |
|
|
---------------------
|
1292 |
|
|
-- Analyze_Context --
|
1293 |
|
|
---------------------
|
1294 |
|
|
|
1295 |
|
|
procedure Analyze_Context (N : Node_Id) is
|
1296 |
|
|
Ukind : constant Node_Kind := Nkind (Unit (N));
|
1297 |
|
|
Item : Node_Id;
|
1298 |
|
|
|
1299 |
|
|
begin
|
1300 |
|
|
-- First process all configuration pragmas at the start of the context
|
1301 |
|
|
-- items. Strictly these are not part of the context clause, but that
|
1302 |
|
|
-- is where the parser puts them. In any case for sure we must analyze
|
1303 |
|
|
-- these before analyzing the actual context items, since they can have
|
1304 |
|
|
-- an effect on that analysis (e.g. pragma Ada_2005 may allow a unit to
|
1305 |
|
|
-- be with'ed as a result of changing categorizations in Ada 2005).
|
1306 |
|
|
|
1307 |
|
|
Item := First (Context_Items (N));
|
1308 |
|
|
while Present (Item)
|
1309 |
|
|
and then Nkind (Item) = N_Pragma
|
1310 |
|
|
and then Pragma_Name (Item) in Configuration_Pragma_Names
|
1311 |
|
|
loop
|
1312 |
|
|
Analyze (Item);
|
1313 |
|
|
Next (Item);
|
1314 |
|
|
end loop;
|
1315 |
|
|
|
1316 |
|
|
-- This is the point at which we capture the configuration settings
|
1317 |
|
|
-- for the unit. At the moment only the Optimize_Alignment setting
|
1318 |
|
|
-- needs to be captured. Probably more later ???
|
1319 |
|
|
|
1320 |
|
|
if Optimize_Alignment_Local then
|
1321 |
|
|
Set_OA_Setting (Current_Sem_Unit, 'L');
|
1322 |
|
|
else
|
1323 |
|
|
Set_OA_Setting (Current_Sem_Unit, Optimize_Alignment);
|
1324 |
|
|
end if;
|
1325 |
|
|
|
1326 |
|
|
-- Loop through actual context items. This is done in two passes:
|
1327 |
|
|
|
1328 |
|
|
-- a) The first pass analyzes non-limited with-clauses and also any
|
1329 |
|
|
-- configuration pragmas (we need to get the latter analyzed right
|
1330 |
|
|
-- away, since they can affect processing of subsequent items.
|
1331 |
|
|
|
1332 |
|
|
-- b) The second pass analyzes limited_with clauses (Ada 2005: AI-50217)
|
1333 |
|
|
|
1334 |
|
|
while Present (Item) loop
|
1335 |
|
|
|
1336 |
|
|
-- For with clause, analyze the with clause, and then update the
|
1337 |
|
|
-- version, since we are dependent on a unit that we with.
|
1338 |
|
|
|
1339 |
|
|
if Nkind (Item) = N_With_Clause
|
1340 |
|
|
and then not Limited_Present (Item)
|
1341 |
|
|
then
|
1342 |
|
|
-- Skip analyzing with clause if no unit, nothing to do (this
|
1343 |
|
|
-- happens for a with that references a non-existent unit). Skip
|
1344 |
|
|
-- as well if this is a with_clause for the main unit, which
|
1345 |
|
|
-- happens if a subunit has a useless with_clause on its parent.
|
1346 |
|
|
|
1347 |
|
|
if Present (Library_Unit (Item)) then
|
1348 |
|
|
if Library_Unit (Item) /= Cunit (Current_Sem_Unit) then
|
1349 |
|
|
Analyze (Item);
|
1350 |
|
|
|
1351 |
|
|
else
|
1352 |
|
|
Set_Entity (Name (Item), Cunit_Entity (Current_Sem_Unit));
|
1353 |
|
|
end if;
|
1354 |
|
|
end if;
|
1355 |
|
|
|
1356 |
|
|
if not Implicit_With (Item) then
|
1357 |
|
|
Version_Update (N, Library_Unit (Item));
|
1358 |
|
|
end if;
|
1359 |
|
|
|
1360 |
|
|
-- Skip pragmas. Configuration pragmas at the start were handled in
|
1361 |
|
|
-- the loop above, and remaining pragmas are not processed until we
|
1362 |
|
|
-- actually install the context (see Install_Context). We delay the
|
1363 |
|
|
-- analysis of these pragmas to make sure that we have installed all
|
1364 |
|
|
-- the implicit with's on parent units.
|
1365 |
|
|
|
1366 |
|
|
-- Skip use clauses at this stage, since we don't want to do any
|
1367 |
|
|
-- installing of potentially use-visible entities until we
|
1368 |
|
|
-- actually install the complete context (in Install_Context).
|
1369 |
|
|
-- Otherwise things can get installed in the wrong context.
|
1370 |
|
|
|
1371 |
|
|
else
|
1372 |
|
|
null;
|
1373 |
|
|
end if;
|
1374 |
|
|
|
1375 |
|
|
Next (Item);
|
1376 |
|
|
end loop;
|
1377 |
|
|
|
1378 |
|
|
-- Second pass: examine all limited_with clauses. All other context
|
1379 |
|
|
-- items are ignored in this pass.
|
1380 |
|
|
|
1381 |
|
|
Item := First (Context_Items (N));
|
1382 |
|
|
while Present (Item) loop
|
1383 |
|
|
if Nkind (Item) = N_With_Clause
|
1384 |
|
|
and then Limited_Present (Item)
|
1385 |
|
|
then
|
1386 |
|
|
-- No need to check errors on implicitly generated limited-with
|
1387 |
|
|
-- clauses.
|
1388 |
|
|
|
1389 |
|
|
if not Implicit_With (Item) then
|
1390 |
|
|
|
1391 |
|
|
-- Verify that the illegal contexts given in 10.1.2 (18/2) are
|
1392 |
|
|
-- properly rejected, including renaming declarations.
|
1393 |
|
|
|
1394 |
|
|
if not Nkind_In (Ukind, N_Package_Declaration,
|
1395 |
|
|
N_Subprogram_Declaration)
|
1396 |
|
|
and then Ukind not in N_Generic_Declaration
|
1397 |
|
|
and then Ukind not in N_Generic_Instantiation
|
1398 |
|
|
then
|
1399 |
|
|
Error_Msg_N ("limited with_clause not allowed here", Item);
|
1400 |
|
|
|
1401 |
|
|
-- Check wrong use of a limited with clause applied to the
|
1402 |
|
|
-- compilation unit containing the limited-with clause.
|
1403 |
|
|
|
1404 |
|
|
-- limited with P.Q;
|
1405 |
|
|
-- package P.Q is ...
|
1406 |
|
|
|
1407 |
|
|
elsif Unit (Library_Unit (Item)) = Unit (N) then
|
1408 |
|
|
Error_Msg_N ("wrong use of limited-with clause", Item);
|
1409 |
|
|
|
1410 |
|
|
-- Check wrong use of limited-with clause applied to some
|
1411 |
|
|
-- immediate ancestor.
|
1412 |
|
|
|
1413 |
|
|
elsif Is_Child_Spec (Unit (N)) then
|
1414 |
|
|
declare
|
1415 |
|
|
Lib_U : constant Entity_Id := Unit (Library_Unit (Item));
|
1416 |
|
|
P : Node_Id;
|
1417 |
|
|
|
1418 |
|
|
begin
|
1419 |
|
|
P := Parent_Spec (Unit (N));
|
1420 |
|
|
loop
|
1421 |
|
|
if Unit (P) = Lib_U then
|
1422 |
|
|
Error_Msg_N ("limited with_clause of immediate "
|
1423 |
|
|
& "ancestor not allowed", Item);
|
1424 |
|
|
exit;
|
1425 |
|
|
end if;
|
1426 |
|
|
|
1427 |
|
|
exit when not Is_Child_Spec (Unit (P));
|
1428 |
|
|
P := Parent_Spec (Unit (P));
|
1429 |
|
|
end loop;
|
1430 |
|
|
end;
|
1431 |
|
|
end if;
|
1432 |
|
|
|
1433 |
|
|
-- Check if the limited-withed unit is already visible through
|
1434 |
|
|
-- some context clause of the current compilation unit or some
|
1435 |
|
|
-- ancestor of the current compilation unit.
|
1436 |
|
|
|
1437 |
|
|
declare
|
1438 |
|
|
Lim_Unit_Name : constant Node_Id := Name (Item);
|
1439 |
|
|
Comp_Unit : Node_Id;
|
1440 |
|
|
It : Node_Id;
|
1441 |
|
|
Unit_Name : Node_Id;
|
1442 |
|
|
|
1443 |
|
|
begin
|
1444 |
|
|
Comp_Unit := N;
|
1445 |
|
|
loop
|
1446 |
|
|
It := First (Context_Items (Comp_Unit));
|
1447 |
|
|
while Present (It) loop
|
1448 |
|
|
if Item /= It
|
1449 |
|
|
and then Nkind (It) = N_With_Clause
|
1450 |
|
|
and then not Limited_Present (It)
|
1451 |
|
|
and then
|
1452 |
|
|
Nkind_In (Unit (Library_Unit (It)),
|
1453 |
|
|
N_Package_Declaration,
|
1454 |
|
|
N_Package_Renaming_Declaration)
|
1455 |
|
|
then
|
1456 |
|
|
if Nkind (Unit (Library_Unit (It))) =
|
1457 |
|
|
N_Package_Declaration
|
1458 |
|
|
then
|
1459 |
|
|
Unit_Name := Name (It);
|
1460 |
|
|
else
|
1461 |
|
|
Unit_Name := Name (Unit (Library_Unit (It)));
|
1462 |
|
|
end if;
|
1463 |
|
|
|
1464 |
|
|
-- Check if the named package (or some ancestor)
|
1465 |
|
|
-- leaves visible the full-view of the unit given
|
1466 |
|
|
-- in the limited-with clause
|
1467 |
|
|
|
1468 |
|
|
loop
|
1469 |
|
|
if Designate_Same_Unit (Lim_Unit_Name,
|
1470 |
|
|
Unit_Name)
|
1471 |
|
|
then
|
1472 |
|
|
Error_Msg_Sloc := Sloc (It);
|
1473 |
|
|
Error_Msg_N
|
1474 |
|
|
("simultaneous visibility of limited "
|
1475 |
|
|
& "and unlimited views not allowed",
|
1476 |
|
|
Item);
|
1477 |
|
|
Error_Msg_NE
|
1478 |
|
|
("\unlimited view visible through "
|
1479 |
|
|
& "context clause #",
|
1480 |
|
|
Item, It);
|
1481 |
|
|
exit;
|
1482 |
|
|
|
1483 |
|
|
elsif Nkind (Unit_Name) = N_Identifier then
|
1484 |
|
|
exit;
|
1485 |
|
|
end if;
|
1486 |
|
|
|
1487 |
|
|
Unit_Name := Prefix (Unit_Name);
|
1488 |
|
|
end loop;
|
1489 |
|
|
end if;
|
1490 |
|
|
|
1491 |
|
|
Next (It);
|
1492 |
|
|
end loop;
|
1493 |
|
|
|
1494 |
|
|
exit when not Is_Child_Spec (Unit (Comp_Unit));
|
1495 |
|
|
|
1496 |
|
|
Comp_Unit := Parent_Spec (Unit (Comp_Unit));
|
1497 |
|
|
end loop;
|
1498 |
|
|
end;
|
1499 |
|
|
end if;
|
1500 |
|
|
|
1501 |
|
|
-- Skip analyzing with clause if no unit, see above
|
1502 |
|
|
|
1503 |
|
|
if Present (Library_Unit (Item)) then
|
1504 |
|
|
Analyze (Item);
|
1505 |
|
|
end if;
|
1506 |
|
|
|
1507 |
|
|
-- A limited_with does not impose an elaboration order, but
|
1508 |
|
|
-- there is a semantic dependency for recompilation purposes.
|
1509 |
|
|
|
1510 |
|
|
if not Implicit_With (Item) then
|
1511 |
|
|
Version_Update (N, Library_Unit (Item));
|
1512 |
|
|
end if;
|
1513 |
|
|
|
1514 |
|
|
-- Pragmas and use clauses and with clauses other than limited
|
1515 |
|
|
-- with's are ignored in this pass through the context items.
|
1516 |
|
|
|
1517 |
|
|
else
|
1518 |
|
|
null;
|
1519 |
|
|
end if;
|
1520 |
|
|
|
1521 |
|
|
Next (Item);
|
1522 |
|
|
end loop;
|
1523 |
|
|
end Analyze_Context;
|
1524 |
|
|
|
1525 |
|
|
-------------------------------
|
1526 |
|
|
-- Analyze_Package_Body_Stub --
|
1527 |
|
|
-------------------------------
|
1528 |
|
|
|
1529 |
|
|
procedure Analyze_Package_Body_Stub (N : Node_Id) is
|
1530 |
|
|
Id : constant Entity_Id := Defining_Identifier (N);
|
1531 |
|
|
Nam : Entity_Id;
|
1532 |
|
|
|
1533 |
|
|
begin
|
1534 |
|
|
-- The package declaration must be in the current declarative part
|
1535 |
|
|
|
1536 |
|
|
Check_Stub_Level (N);
|
1537 |
|
|
Nam := Current_Entity_In_Scope (Id);
|
1538 |
|
|
|
1539 |
|
|
if No (Nam) or else not Is_Package_Or_Generic_Package (Nam) then
|
1540 |
|
|
Error_Msg_N ("missing specification for package stub", N);
|
1541 |
|
|
|
1542 |
|
|
elsif Has_Completion (Nam)
|
1543 |
|
|
and then Present (Corresponding_Body (Unit_Declaration_Node (Nam)))
|
1544 |
|
|
then
|
1545 |
|
|
Error_Msg_N ("duplicate or redundant stub for package", N);
|
1546 |
|
|
|
1547 |
|
|
else
|
1548 |
|
|
-- Indicate that the body of the package exists. If we are doing
|
1549 |
|
|
-- only semantic analysis, the stub stands for the body. If we are
|
1550 |
|
|
-- generating code, the existence of the body will be confirmed
|
1551 |
|
|
-- when we load the proper body.
|
1552 |
|
|
|
1553 |
|
|
Set_Has_Completion (Nam);
|
1554 |
|
|
Set_Scope (Defining_Entity (N), Current_Scope);
|
1555 |
|
|
Generate_Reference (Nam, Id, 'b');
|
1556 |
|
|
Analyze_Proper_Body (N, Nam);
|
1557 |
|
|
end if;
|
1558 |
|
|
end Analyze_Package_Body_Stub;
|
1559 |
|
|
|
1560 |
|
|
-------------------------
|
1561 |
|
|
-- Analyze_Proper_Body --
|
1562 |
|
|
-------------------------
|
1563 |
|
|
|
1564 |
|
|
procedure Analyze_Proper_Body (N : Node_Id; Nam : Entity_Id) is
|
1565 |
|
|
Subunit_Name : constant Unit_Name_Type := Get_Unit_Name (N);
|
1566 |
|
|
Unum : Unit_Number_Type;
|
1567 |
|
|
|
1568 |
|
|
procedure Optional_Subunit;
|
1569 |
|
|
-- This procedure is called when the main unit is a stub, or when we
|
1570 |
|
|
-- are not generating code. In such a case, we analyze the subunit if
|
1571 |
|
|
-- present, which is user-friendly and in fact required for ASIS, but
|
1572 |
|
|
-- we don't complain if the subunit is missing.
|
1573 |
|
|
|
1574 |
|
|
----------------------
|
1575 |
|
|
-- Optional_Subunit --
|
1576 |
|
|
----------------------
|
1577 |
|
|
|
1578 |
|
|
procedure Optional_Subunit is
|
1579 |
|
|
Comp_Unit : Node_Id;
|
1580 |
|
|
|
1581 |
|
|
begin
|
1582 |
|
|
-- Try to load subunit, but ignore any errors that occur during
|
1583 |
|
|
-- the loading of the subunit, by using the special feature in
|
1584 |
|
|
-- Errout to ignore all errors. Note that Fatal_Error will still
|
1585 |
|
|
-- be set, so we will be able to check for this case below.
|
1586 |
|
|
|
1587 |
|
|
if not ASIS_Mode then
|
1588 |
|
|
Ignore_Errors_Enable := Ignore_Errors_Enable + 1;
|
1589 |
|
|
end if;
|
1590 |
|
|
|
1591 |
|
|
Unum :=
|
1592 |
|
|
Load_Unit
|
1593 |
|
|
(Load_Name => Subunit_Name,
|
1594 |
|
|
Required => False,
|
1595 |
|
|
Subunit => True,
|
1596 |
|
|
Error_Node => N);
|
1597 |
|
|
|
1598 |
|
|
if not ASIS_Mode then
|
1599 |
|
|
Ignore_Errors_Enable := Ignore_Errors_Enable - 1;
|
1600 |
|
|
end if;
|
1601 |
|
|
|
1602 |
|
|
-- All done if we successfully loaded the subunit
|
1603 |
|
|
|
1604 |
|
|
if Unum /= No_Unit
|
1605 |
|
|
and then (not Fatal_Error (Unum) or else Try_Semantics)
|
1606 |
|
|
then
|
1607 |
|
|
Comp_Unit := Cunit (Unum);
|
1608 |
|
|
|
1609 |
|
|
-- If the file was empty or seriously mangled, the unit itself may
|
1610 |
|
|
-- be missing.
|
1611 |
|
|
|
1612 |
|
|
if No (Unit (Comp_Unit)) then
|
1613 |
|
|
Error_Msg_N
|
1614 |
|
|
("subunit does not contain expected proper body", N);
|
1615 |
|
|
|
1616 |
|
|
elsif Nkind (Unit (Comp_Unit)) /= N_Subunit then
|
1617 |
|
|
Error_Msg_N
|
1618 |
|
|
("expected SEPARATE subunit, found child unit",
|
1619 |
|
|
Cunit_Entity (Unum));
|
1620 |
|
|
else
|
1621 |
|
|
Set_Corresponding_Stub (Unit (Comp_Unit), N);
|
1622 |
|
|
Analyze_Subunit (Comp_Unit);
|
1623 |
|
|
Set_Library_Unit (N, Comp_Unit);
|
1624 |
|
|
end if;
|
1625 |
|
|
|
1626 |
|
|
elsif Unum = No_Unit
|
1627 |
|
|
and then Present (Nam)
|
1628 |
|
|
then
|
1629 |
|
|
if Is_Protected_Type (Nam) then
|
1630 |
|
|
Set_Corresponding_Body (Parent (Nam), Defining_Identifier (N));
|
1631 |
|
|
else
|
1632 |
|
|
Set_Corresponding_Body (
|
1633 |
|
|
Unit_Declaration_Node (Nam), Defining_Identifier (N));
|
1634 |
|
|
end if;
|
1635 |
|
|
end if;
|
1636 |
|
|
end Optional_Subunit;
|
1637 |
|
|
|
1638 |
|
|
-- Start of processing for Analyze_Proper_Body
|
1639 |
|
|
|
1640 |
|
|
begin
|
1641 |
|
|
-- If the subunit is already loaded, it means that the main unit is a
|
1642 |
|
|
-- subunit, and that the current unit is one of its parents which was
|
1643 |
|
|
-- being analyzed to provide the needed context for the analysis of the
|
1644 |
|
|
-- subunit. In this case we analyze the subunit and continue with the
|
1645 |
|
|
-- parent, without looking a subsequent subunits.
|
1646 |
|
|
|
1647 |
|
|
if Is_Loaded (Subunit_Name) then
|
1648 |
|
|
|
1649 |
|
|
-- If the proper body is already linked to the stub node, the stub is
|
1650 |
|
|
-- in a generic unit and just needs analyzing.
|
1651 |
|
|
|
1652 |
|
|
if Present (Library_Unit (N)) then
|
1653 |
|
|
Set_Corresponding_Stub (Unit (Library_Unit (N)), N);
|
1654 |
|
|
Analyze_Subunit (Library_Unit (N));
|
1655 |
|
|
|
1656 |
|
|
-- Otherwise we must load the subunit and link to it
|
1657 |
|
|
|
1658 |
|
|
else
|
1659 |
|
|
-- Load the subunit, this must work, since we originally loaded
|
1660 |
|
|
-- the subunit earlier on. So this will not really load it, just
|
1661 |
|
|
-- give access to it.
|
1662 |
|
|
|
1663 |
|
|
Unum :=
|
1664 |
|
|
Load_Unit
|
1665 |
|
|
(Load_Name => Subunit_Name,
|
1666 |
|
|
Required => True,
|
1667 |
|
|
Subunit => False,
|
1668 |
|
|
Error_Node => N);
|
1669 |
|
|
|
1670 |
|
|
-- And analyze the subunit in the parent context (note that we
|
1671 |
|
|
-- do not call Semantics, since that would remove the parent
|
1672 |
|
|
-- context). Because of this, we have to manually reset the
|
1673 |
|
|
-- compiler state to Analyzing since it got destroyed by Load.
|
1674 |
|
|
|
1675 |
|
|
if Unum /= No_Unit then
|
1676 |
|
|
Compiler_State := Analyzing;
|
1677 |
|
|
|
1678 |
|
|
-- Check that the proper body is a subunit and not a child
|
1679 |
|
|
-- unit. If the unit was previously loaded, the error will
|
1680 |
|
|
-- have been emitted when copying the generic node, so we
|
1681 |
|
|
-- just return to avoid cascaded errors.
|
1682 |
|
|
|
1683 |
|
|
if Nkind (Unit (Cunit (Unum))) /= N_Subunit then
|
1684 |
|
|
return;
|
1685 |
|
|
end if;
|
1686 |
|
|
|
1687 |
|
|
Set_Corresponding_Stub (Unit (Cunit (Unum)), N);
|
1688 |
|
|
Analyze_Subunit (Cunit (Unum));
|
1689 |
|
|
Set_Library_Unit (N, Cunit (Unum));
|
1690 |
|
|
end if;
|
1691 |
|
|
end if;
|
1692 |
|
|
|
1693 |
|
|
-- If the main unit is a subunit, then we are just performing semantic
|
1694 |
|
|
-- analysis on that subunit, and any other subunits of any parent unit
|
1695 |
|
|
-- should be ignored, except that if we are building trees for ASIS
|
1696 |
|
|
-- usage we want to annotate the stub properly.
|
1697 |
|
|
|
1698 |
|
|
elsif Nkind (Unit (Cunit (Main_Unit))) = N_Subunit
|
1699 |
|
|
and then Subunit_Name /= Unit_Name (Main_Unit)
|
1700 |
|
|
then
|
1701 |
|
|
if ASIS_Mode then
|
1702 |
|
|
Optional_Subunit;
|
1703 |
|
|
end if;
|
1704 |
|
|
|
1705 |
|
|
-- But before we return, set the flag for unloaded subunits. This
|
1706 |
|
|
-- will suppress junk warnings of variables in the same declarative
|
1707 |
|
|
-- part (or a higher level one) that are in danger of looking unused
|
1708 |
|
|
-- when in fact there might be a declaration in the subunit that we
|
1709 |
|
|
-- do not intend to load.
|
1710 |
|
|
|
1711 |
|
|
Unloaded_Subunits := True;
|
1712 |
|
|
return;
|
1713 |
|
|
|
1714 |
|
|
-- If the subunit is not already loaded, and we are generating code,
|
1715 |
|
|
-- then this is the case where compilation started from the parent,
|
1716 |
|
|
-- and we are generating code for an entire subunit tree. In that
|
1717 |
|
|
-- case we definitely need to load the subunit.
|
1718 |
|
|
|
1719 |
|
|
-- In order to continue the analysis with the rest of the parent,
|
1720 |
|
|
-- and other subunits, we load the unit without requiring its
|
1721 |
|
|
-- presence, and emit a warning if not found, rather than terminating
|
1722 |
|
|
-- the compilation abruptly, as for other missing file problems.
|
1723 |
|
|
|
1724 |
|
|
elsif Original_Operating_Mode = Generate_Code then
|
1725 |
|
|
|
1726 |
|
|
-- If the proper body is already linked to the stub node,
|
1727 |
|
|
-- the stub is in a generic unit and just needs analyzing.
|
1728 |
|
|
|
1729 |
|
|
-- We update the version. Although we are not technically
|
1730 |
|
|
-- semantically dependent on the subunit, given our approach
|
1731 |
|
|
-- of macro substitution of subunits, it makes sense to
|
1732 |
|
|
-- include it in the version identification.
|
1733 |
|
|
|
1734 |
|
|
if Present (Library_Unit (N)) then
|
1735 |
|
|
Set_Corresponding_Stub (Unit (Library_Unit (N)), N);
|
1736 |
|
|
Analyze_Subunit (Library_Unit (N));
|
1737 |
|
|
Version_Update (Cunit (Main_Unit), Library_Unit (N));
|
1738 |
|
|
|
1739 |
|
|
-- Otherwise we must load the subunit and link to it
|
1740 |
|
|
|
1741 |
|
|
else
|
1742 |
|
|
Unum :=
|
1743 |
|
|
Load_Unit
|
1744 |
|
|
(Load_Name => Subunit_Name,
|
1745 |
|
|
Required => False,
|
1746 |
|
|
Subunit => True,
|
1747 |
|
|
Error_Node => N);
|
1748 |
|
|
|
1749 |
|
|
-- Give message if we did not get the unit
|
1750 |
|
|
-- Emit warning even if missing subunit is not
|
1751 |
|
|
-- within main unit, to simplify debugging.
|
1752 |
|
|
|
1753 |
|
|
if Original_Operating_Mode = Generate_Code
|
1754 |
|
|
and then Unum = No_Unit
|
1755 |
|
|
then
|
1756 |
|
|
Error_Msg_Unit_1 := Subunit_Name;
|
1757 |
|
|
Error_Msg_File_1 :=
|
1758 |
|
|
Get_File_Name (Subunit_Name, Subunit => True);
|
1759 |
|
|
Error_Msg_N
|
1760 |
|
|
("subunit$$ in file{ not found?!!", N);
|
1761 |
|
|
Subunits_Missing := True;
|
1762 |
|
|
end if;
|
1763 |
|
|
|
1764 |
|
|
-- Load_Unit may reset Compiler_State, since it may have been
|
1765 |
|
|
-- necessary to parse an additional units, so we make sure
|
1766 |
|
|
-- that we reset it to the Analyzing state.
|
1767 |
|
|
|
1768 |
|
|
Compiler_State := Analyzing;
|
1769 |
|
|
|
1770 |
|
|
if Unum /= No_Unit then
|
1771 |
|
|
if Debug_Flag_L then
|
1772 |
|
|
Write_Str ("*** Loaded subunit from stub. Analyze");
|
1773 |
|
|
Write_Eol;
|
1774 |
|
|
end if;
|
1775 |
|
|
|
1776 |
|
|
declare
|
1777 |
|
|
Comp_Unit : constant Node_Id := Cunit (Unum);
|
1778 |
|
|
|
1779 |
|
|
begin
|
1780 |
|
|
-- Check for child unit instead of subunit
|
1781 |
|
|
|
1782 |
|
|
if Nkind (Unit (Comp_Unit)) /= N_Subunit then
|
1783 |
|
|
Error_Msg_N
|
1784 |
|
|
("expected SEPARATE subunit, found child unit",
|
1785 |
|
|
Cunit_Entity (Unum));
|
1786 |
|
|
|
1787 |
|
|
-- OK, we have a subunit
|
1788 |
|
|
|
1789 |
|
|
else
|
1790 |
|
|
-- Set corresponding stub (even if errors)
|
1791 |
|
|
|
1792 |
|
|
Set_Corresponding_Stub (Unit (Comp_Unit), N);
|
1793 |
|
|
|
1794 |
|
|
-- Collect SCO information for loaded subunit if we are
|
1795 |
|
|
-- in the main unit).
|
1796 |
|
|
|
1797 |
|
|
if Generate_SCO
|
1798 |
|
|
and then
|
1799 |
|
|
In_Extended_Main_Source_Unit
|
1800 |
|
|
(Cunit_Entity (Current_Sem_Unit))
|
1801 |
|
|
then
|
1802 |
|
|
SCO_Record (Unum);
|
1803 |
|
|
end if;
|
1804 |
|
|
|
1805 |
|
|
-- Analyze the unit if semantics active
|
1806 |
|
|
|
1807 |
|
|
if not Fatal_Error (Unum) or else Try_Semantics then
|
1808 |
|
|
Analyze_Subunit (Comp_Unit);
|
1809 |
|
|
end if;
|
1810 |
|
|
|
1811 |
|
|
-- Set the library unit pointer in any case
|
1812 |
|
|
|
1813 |
|
|
Set_Library_Unit (N, Comp_Unit);
|
1814 |
|
|
|
1815 |
|
|
-- We update the version. Although we are not technically
|
1816 |
|
|
-- semantically dependent on the subunit, given our
|
1817 |
|
|
-- approach of macro substitution of subunits, it makes
|
1818 |
|
|
-- sense to include it in the version identification.
|
1819 |
|
|
|
1820 |
|
|
Version_Update (Cunit (Main_Unit), Comp_Unit);
|
1821 |
|
|
end if;
|
1822 |
|
|
end;
|
1823 |
|
|
end if;
|
1824 |
|
|
end if;
|
1825 |
|
|
|
1826 |
|
|
-- The remaining case is when the subunit is not already loaded and
|
1827 |
|
|
-- we are not generating code. In this case we are just performing
|
1828 |
|
|
-- semantic analysis on the parent, and we are not interested in
|
1829 |
|
|
-- the subunit. For subprograms, analyze the stub as a body. For
|
1830 |
|
|
-- other entities the stub has already been marked as completed.
|
1831 |
|
|
|
1832 |
|
|
else
|
1833 |
|
|
Optional_Subunit;
|
1834 |
|
|
end if;
|
1835 |
|
|
end Analyze_Proper_Body;
|
1836 |
|
|
|
1837 |
|
|
----------------------------------
|
1838 |
|
|
-- Analyze_Protected_Body_Stub --
|
1839 |
|
|
----------------------------------
|
1840 |
|
|
|
1841 |
|
|
procedure Analyze_Protected_Body_Stub (N : Node_Id) is
|
1842 |
|
|
Nam : Entity_Id := Current_Entity_In_Scope (Defining_Identifier (N));
|
1843 |
|
|
|
1844 |
|
|
begin
|
1845 |
|
|
Check_Stub_Level (N);
|
1846 |
|
|
|
1847 |
|
|
-- First occurrence of name may have been as an incomplete type
|
1848 |
|
|
|
1849 |
|
|
if Present (Nam) and then Ekind (Nam) = E_Incomplete_Type then
|
1850 |
|
|
Nam := Full_View (Nam);
|
1851 |
|
|
end if;
|
1852 |
|
|
|
1853 |
|
|
if No (Nam)
|
1854 |
|
|
or else not Is_Protected_Type (Etype (Nam))
|
1855 |
|
|
then
|
1856 |
|
|
Error_Msg_N ("missing specification for Protected body", N);
|
1857 |
|
|
else
|
1858 |
|
|
Set_Scope (Defining_Entity (N), Current_Scope);
|
1859 |
|
|
Set_Has_Completion (Etype (Nam));
|
1860 |
|
|
Generate_Reference (Nam, Defining_Identifier (N), 'b');
|
1861 |
|
|
Analyze_Proper_Body (N, Etype (Nam));
|
1862 |
|
|
end if;
|
1863 |
|
|
end Analyze_Protected_Body_Stub;
|
1864 |
|
|
|
1865 |
|
|
----------------------------------
|
1866 |
|
|
-- Analyze_Subprogram_Body_Stub --
|
1867 |
|
|
----------------------------------
|
1868 |
|
|
|
1869 |
|
|
-- A subprogram body stub can appear with or without a previous spec. If
|
1870 |
|
|
-- there is one, then the analysis of the body will find it and verify
|
1871 |
|
|
-- conformance. The formals appearing in the specification of the stub play
|
1872 |
|
|
-- no role, except for requiring an additional conformance check. If there
|
1873 |
|
|
-- is no previous subprogram declaration, the stub acts as a spec, and
|
1874 |
|
|
-- provides the defining entity for the subprogram.
|
1875 |
|
|
|
1876 |
|
|
procedure Analyze_Subprogram_Body_Stub (N : Node_Id) is
|
1877 |
|
|
Decl : Node_Id;
|
1878 |
|
|
|
1879 |
|
|
begin
|
1880 |
|
|
Check_Stub_Level (N);
|
1881 |
|
|
|
1882 |
|
|
-- Verify that the identifier for the stub is unique within this
|
1883 |
|
|
-- declarative part.
|
1884 |
|
|
|
1885 |
|
|
if Nkind_In (Parent (N), N_Block_Statement,
|
1886 |
|
|
N_Package_Body,
|
1887 |
|
|
N_Subprogram_Body)
|
1888 |
|
|
then
|
1889 |
|
|
Decl := First (Declarations (Parent (N)));
|
1890 |
|
|
while Present (Decl)
|
1891 |
|
|
and then Decl /= N
|
1892 |
|
|
loop
|
1893 |
|
|
if Nkind (Decl) = N_Subprogram_Body_Stub
|
1894 |
|
|
and then (Chars (Defining_Unit_Name (Specification (Decl))) =
|
1895 |
|
|
Chars (Defining_Unit_Name (Specification (N))))
|
1896 |
|
|
then
|
1897 |
|
|
Error_Msg_N ("identifier for stub is not unique", N);
|
1898 |
|
|
end if;
|
1899 |
|
|
|
1900 |
|
|
Next (Decl);
|
1901 |
|
|
end loop;
|
1902 |
|
|
end if;
|
1903 |
|
|
|
1904 |
|
|
-- Treat stub as a body, which checks conformance if there is a previous
|
1905 |
|
|
-- declaration, or else introduces entity and its signature.
|
1906 |
|
|
|
1907 |
|
|
Analyze_Subprogram_Body (N);
|
1908 |
|
|
Analyze_Proper_Body (N, Empty);
|
1909 |
|
|
end Analyze_Subprogram_Body_Stub;
|
1910 |
|
|
|
1911 |
|
|
---------------------
|
1912 |
|
|
-- Analyze_Subunit --
|
1913 |
|
|
---------------------
|
1914 |
|
|
|
1915 |
|
|
-- A subunit is compiled either by itself (for semantic checking) or as
|
1916 |
|
|
-- part of compiling the parent (for code generation). In either case, by
|
1917 |
|
|
-- the time we actually process the subunit, the parent has already been
|
1918 |
|
|
-- installed and analyzed. The node N is a compilation unit, whose context
|
1919 |
|
|
-- needs to be treated here, because we come directly here from the parent
|
1920 |
|
|
-- without calling Analyze_Compilation_Unit.
|
1921 |
|
|
|
1922 |
|
|
-- The compilation context includes the explicit context of the subunit,
|
1923 |
|
|
-- and the context of the parent, together with the parent itself. In order
|
1924 |
|
|
-- to compile the current context, we remove the one inherited from the
|
1925 |
|
|
-- parent, in order to have a clean visibility table. We restore the parent
|
1926 |
|
|
-- context before analyzing the proper body itself. On exit, we remove only
|
1927 |
|
|
-- the explicit context of the subunit.
|
1928 |
|
|
|
1929 |
|
|
procedure Analyze_Subunit (N : Node_Id) is
|
1930 |
|
|
Lib_Unit : constant Node_Id := Library_Unit (N);
|
1931 |
|
|
Par_Unit : constant Entity_Id := Current_Scope;
|
1932 |
|
|
|
1933 |
|
|
Lib_Spec : Node_Id := Library_Unit (Lib_Unit);
|
1934 |
|
|
Num_Scopes : Int := 0;
|
1935 |
|
|
Use_Clauses : array (1 .. Scope_Stack.Last) of Node_Id;
|
1936 |
|
|
Enclosing_Child : Entity_Id := Empty;
|
1937 |
|
|
Svg : constant Suppress_Array := Scope_Suppress;
|
1938 |
|
|
|
1939 |
|
|
procedure Analyze_Subunit_Context;
|
1940 |
|
|
-- Capture names in use clauses of the subunit. This must be done before
|
1941 |
|
|
-- re-installing parent declarations, because items in the context must
|
1942 |
|
|
-- not be hidden by declarations local to the parent.
|
1943 |
|
|
|
1944 |
|
|
procedure Re_Install_Parents (L : Node_Id; Scop : Entity_Id);
|
1945 |
|
|
-- Recursive procedure to restore scope of all ancestors of subunit,
|
1946 |
|
|
-- from outermost in. If parent is not a subunit, the call to install
|
1947 |
|
|
-- context installs context of spec and (if parent is a child unit) the
|
1948 |
|
|
-- context of its parents as well. It is confusing that parents should
|
1949 |
|
|
-- be treated differently in both cases, but the semantics are just not
|
1950 |
|
|
-- identical.
|
1951 |
|
|
|
1952 |
|
|
procedure Re_Install_Use_Clauses;
|
1953 |
|
|
-- As part of the removal of the parent scope, the use clauses are
|
1954 |
|
|
-- removed, to be reinstalled when the context of the subunit has been
|
1955 |
|
|
-- analyzed. Use clauses may also have been affected by the analysis of
|
1956 |
|
|
-- the context of the subunit, so they have to be applied again, to
|
1957 |
|
|
-- insure that the compilation environment of the rest of the parent
|
1958 |
|
|
-- unit is identical.
|
1959 |
|
|
|
1960 |
|
|
procedure Remove_Scope;
|
1961 |
|
|
-- Remove current scope from scope stack, and preserve the list of use
|
1962 |
|
|
-- clauses in it, to be reinstalled after context is analyzed.
|
1963 |
|
|
|
1964 |
|
|
-----------------------------
|
1965 |
|
|
-- Analyze_Subunit_Context --
|
1966 |
|
|
-----------------------------
|
1967 |
|
|
|
1968 |
|
|
procedure Analyze_Subunit_Context is
|
1969 |
|
|
Item : Node_Id;
|
1970 |
|
|
Nam : Node_Id;
|
1971 |
|
|
Unit_Name : Entity_Id;
|
1972 |
|
|
|
1973 |
|
|
begin
|
1974 |
|
|
Analyze_Context (N);
|
1975 |
|
|
|
1976 |
|
|
-- Make withed units immediately visible. If child unit, make the
|
1977 |
|
|
-- ultimate parent immediately visible.
|
1978 |
|
|
|
1979 |
|
|
Item := First (Context_Items (N));
|
1980 |
|
|
while Present (Item) loop
|
1981 |
|
|
if Nkind (Item) = N_With_Clause then
|
1982 |
|
|
|
1983 |
|
|
-- Protect frontend against previous errors in context clauses
|
1984 |
|
|
|
1985 |
|
|
if Nkind (Name (Item)) /= N_Selected_Component then
|
1986 |
|
|
if Error_Posted (Item) then
|
1987 |
|
|
null;
|
1988 |
|
|
|
1989 |
|
|
else
|
1990 |
|
|
Unit_Name := Entity (Name (Item));
|
1991 |
|
|
while Is_Child_Unit (Unit_Name) loop
|
1992 |
|
|
Set_Is_Visible_Child_Unit (Unit_Name);
|
1993 |
|
|
Unit_Name := Scope (Unit_Name);
|
1994 |
|
|
end loop;
|
1995 |
|
|
|
1996 |
|
|
if not Is_Immediately_Visible (Unit_Name) then
|
1997 |
|
|
Set_Is_Immediately_Visible (Unit_Name);
|
1998 |
|
|
Set_Context_Installed (Item);
|
1999 |
|
|
end if;
|
2000 |
|
|
end if;
|
2001 |
|
|
end if;
|
2002 |
|
|
|
2003 |
|
|
elsif Nkind (Item) = N_Use_Package_Clause then
|
2004 |
|
|
Nam := First (Names (Item));
|
2005 |
|
|
while Present (Nam) loop
|
2006 |
|
|
Analyze (Nam);
|
2007 |
|
|
Next (Nam);
|
2008 |
|
|
end loop;
|
2009 |
|
|
|
2010 |
|
|
elsif Nkind (Item) = N_Use_Type_Clause then
|
2011 |
|
|
Nam := First (Subtype_Marks (Item));
|
2012 |
|
|
while Present (Nam) loop
|
2013 |
|
|
Analyze (Nam);
|
2014 |
|
|
Next (Nam);
|
2015 |
|
|
end loop;
|
2016 |
|
|
end if;
|
2017 |
|
|
|
2018 |
|
|
Next (Item);
|
2019 |
|
|
end loop;
|
2020 |
|
|
|
2021 |
|
|
-- Reset visibility of withed units. They will be made visible again
|
2022 |
|
|
-- when we install the subunit context.
|
2023 |
|
|
|
2024 |
|
|
Item := First (Context_Items (N));
|
2025 |
|
|
while Present (Item) loop
|
2026 |
|
|
if Nkind (Item) = N_With_Clause
|
2027 |
|
|
|
2028 |
|
|
-- Protect frontend against previous errors in context clauses
|
2029 |
|
|
|
2030 |
|
|
and then Nkind (Name (Item)) /= N_Selected_Component
|
2031 |
|
|
and then not Error_Posted (Item)
|
2032 |
|
|
then
|
2033 |
|
|
Unit_Name := Entity (Name (Item));
|
2034 |
|
|
while Is_Child_Unit (Unit_Name) loop
|
2035 |
|
|
Set_Is_Visible_Child_Unit (Unit_Name, False);
|
2036 |
|
|
Unit_Name := Scope (Unit_Name);
|
2037 |
|
|
end loop;
|
2038 |
|
|
|
2039 |
|
|
if Context_Installed (Item) then
|
2040 |
|
|
Set_Is_Immediately_Visible (Unit_Name, False);
|
2041 |
|
|
Set_Context_Installed (Item, False);
|
2042 |
|
|
end if;
|
2043 |
|
|
end if;
|
2044 |
|
|
|
2045 |
|
|
Next (Item);
|
2046 |
|
|
end loop;
|
2047 |
|
|
end Analyze_Subunit_Context;
|
2048 |
|
|
|
2049 |
|
|
------------------------
|
2050 |
|
|
-- Re_Install_Parents --
|
2051 |
|
|
------------------------
|
2052 |
|
|
|
2053 |
|
|
procedure Re_Install_Parents (L : Node_Id; Scop : Entity_Id) is
|
2054 |
|
|
E : Entity_Id;
|
2055 |
|
|
|
2056 |
|
|
begin
|
2057 |
|
|
if Nkind (Unit (L)) = N_Subunit then
|
2058 |
|
|
Re_Install_Parents (Library_Unit (L), Scope (Scop));
|
2059 |
|
|
end if;
|
2060 |
|
|
|
2061 |
|
|
Install_Context (L);
|
2062 |
|
|
|
2063 |
|
|
-- If the subunit occurs within a child unit, we must restore the
|
2064 |
|
|
-- immediate visibility of any siblings that may occur in context.
|
2065 |
|
|
|
2066 |
|
|
if Present (Enclosing_Child) then
|
2067 |
|
|
Install_Siblings (Enclosing_Child, L);
|
2068 |
|
|
end if;
|
2069 |
|
|
|
2070 |
|
|
Push_Scope (Scop);
|
2071 |
|
|
|
2072 |
|
|
if Scop /= Par_Unit then
|
2073 |
|
|
Set_Is_Immediately_Visible (Scop);
|
2074 |
|
|
end if;
|
2075 |
|
|
|
2076 |
|
|
-- Make entities in scope visible again. For child units, restore
|
2077 |
|
|
-- visibility only if they are actually in context.
|
2078 |
|
|
|
2079 |
|
|
E := First_Entity (Current_Scope);
|
2080 |
|
|
while Present (E) loop
|
2081 |
|
|
if not Is_Child_Unit (E)
|
2082 |
|
|
or else Is_Visible_Child_Unit (E)
|
2083 |
|
|
then
|
2084 |
|
|
Set_Is_Immediately_Visible (E);
|
2085 |
|
|
end if;
|
2086 |
|
|
|
2087 |
|
|
Next_Entity (E);
|
2088 |
|
|
end loop;
|
2089 |
|
|
|
2090 |
|
|
-- A subunit appears within a body, and for a nested subunits all the
|
2091 |
|
|
-- parents are bodies. Restore full visibility of their private
|
2092 |
|
|
-- entities.
|
2093 |
|
|
|
2094 |
|
|
if Is_Package_Or_Generic_Package (Scop) then
|
2095 |
|
|
Set_In_Package_Body (Scop);
|
2096 |
|
|
Install_Private_Declarations (Scop);
|
2097 |
|
|
end if;
|
2098 |
|
|
end Re_Install_Parents;
|
2099 |
|
|
|
2100 |
|
|
----------------------------
|
2101 |
|
|
-- Re_Install_Use_Clauses --
|
2102 |
|
|
----------------------------
|
2103 |
|
|
|
2104 |
|
|
procedure Re_Install_Use_Clauses is
|
2105 |
|
|
U : Node_Id;
|
2106 |
|
|
begin
|
2107 |
|
|
for J in reverse 1 .. Num_Scopes loop
|
2108 |
|
|
U := Use_Clauses (J);
|
2109 |
|
|
Scope_Stack.Table (Scope_Stack.Last - J + 1).First_Use_Clause := U;
|
2110 |
|
|
Install_Use_Clauses (U, Force_Installation => True);
|
2111 |
|
|
end loop;
|
2112 |
|
|
end Re_Install_Use_Clauses;
|
2113 |
|
|
|
2114 |
|
|
------------------
|
2115 |
|
|
-- Remove_Scope --
|
2116 |
|
|
------------------
|
2117 |
|
|
|
2118 |
|
|
procedure Remove_Scope is
|
2119 |
|
|
E : Entity_Id;
|
2120 |
|
|
|
2121 |
|
|
begin
|
2122 |
|
|
Num_Scopes := Num_Scopes + 1;
|
2123 |
|
|
Use_Clauses (Num_Scopes) :=
|
2124 |
|
|
Scope_Stack.Table (Scope_Stack.Last).First_Use_Clause;
|
2125 |
|
|
|
2126 |
|
|
E := First_Entity (Current_Scope);
|
2127 |
|
|
while Present (E) loop
|
2128 |
|
|
Set_Is_Immediately_Visible (E, False);
|
2129 |
|
|
Next_Entity (E);
|
2130 |
|
|
end loop;
|
2131 |
|
|
|
2132 |
|
|
if Is_Child_Unit (Current_Scope) then
|
2133 |
|
|
Enclosing_Child := Current_Scope;
|
2134 |
|
|
end if;
|
2135 |
|
|
|
2136 |
|
|
Pop_Scope;
|
2137 |
|
|
end Remove_Scope;
|
2138 |
|
|
|
2139 |
|
|
-- Start of processing for Analyze_Subunit
|
2140 |
|
|
|
2141 |
|
|
begin
|
2142 |
|
|
if not Is_Empty_List (Context_Items (N)) then
|
2143 |
|
|
|
2144 |
|
|
-- Save current use clauses
|
2145 |
|
|
|
2146 |
|
|
Remove_Scope;
|
2147 |
|
|
Remove_Context (Lib_Unit);
|
2148 |
|
|
|
2149 |
|
|
-- Now remove parents and their context, including enclosing subunits
|
2150 |
|
|
-- and the outer parent body which is not a subunit.
|
2151 |
|
|
|
2152 |
|
|
if Present (Lib_Spec) then
|
2153 |
|
|
Remove_Context (Lib_Spec);
|
2154 |
|
|
|
2155 |
|
|
while Nkind (Unit (Lib_Spec)) = N_Subunit loop
|
2156 |
|
|
Lib_Spec := Library_Unit (Lib_Spec);
|
2157 |
|
|
Remove_Scope;
|
2158 |
|
|
Remove_Context (Lib_Spec);
|
2159 |
|
|
end loop;
|
2160 |
|
|
|
2161 |
|
|
if Nkind (Unit (Lib_Unit)) = N_Subunit then
|
2162 |
|
|
Remove_Scope;
|
2163 |
|
|
end if;
|
2164 |
|
|
|
2165 |
|
|
if Nkind (Unit (Lib_Spec)) = N_Package_Body then
|
2166 |
|
|
Remove_Context (Library_Unit (Lib_Spec));
|
2167 |
|
|
end if;
|
2168 |
|
|
end if;
|
2169 |
|
|
|
2170 |
|
|
Set_Is_Immediately_Visible (Par_Unit, False);
|
2171 |
|
|
|
2172 |
|
|
Analyze_Subunit_Context;
|
2173 |
|
|
|
2174 |
|
|
Re_Install_Parents (Lib_Unit, Par_Unit);
|
2175 |
|
|
Set_Is_Immediately_Visible (Par_Unit);
|
2176 |
|
|
|
2177 |
|
|
-- If the context includes a child unit of the parent of the subunit,
|
2178 |
|
|
-- the parent will have been removed from visibility, after compiling
|
2179 |
|
|
-- that cousin in the context. The visibility of the parent must be
|
2180 |
|
|
-- restored now. This also applies if the context includes another
|
2181 |
|
|
-- subunit of the same parent which in turn includes a child unit in
|
2182 |
|
|
-- its context.
|
2183 |
|
|
|
2184 |
|
|
if Is_Package_Or_Generic_Package (Par_Unit) then
|
2185 |
|
|
if not Is_Immediately_Visible (Par_Unit)
|
2186 |
|
|
or else (Present (First_Entity (Par_Unit))
|
2187 |
|
|
and then not Is_Immediately_Visible
|
2188 |
|
|
(First_Entity (Par_Unit)))
|
2189 |
|
|
then
|
2190 |
|
|
Set_Is_Immediately_Visible (Par_Unit);
|
2191 |
|
|
Install_Visible_Declarations (Par_Unit);
|
2192 |
|
|
Install_Private_Declarations (Par_Unit);
|
2193 |
|
|
end if;
|
2194 |
|
|
end if;
|
2195 |
|
|
|
2196 |
|
|
Re_Install_Use_Clauses;
|
2197 |
|
|
Install_Context (N);
|
2198 |
|
|
|
2199 |
|
|
-- Restore state of suppress flags for current body
|
2200 |
|
|
|
2201 |
|
|
Scope_Suppress := Svg;
|
2202 |
|
|
|
2203 |
|
|
-- If the subunit is within a child unit, then siblings of any parent
|
2204 |
|
|
-- unit that appear in the context clause of the subunit must also be
|
2205 |
|
|
-- made immediately visible.
|
2206 |
|
|
|
2207 |
|
|
if Present (Enclosing_Child) then
|
2208 |
|
|
Install_Siblings (Enclosing_Child, N);
|
2209 |
|
|
end if;
|
2210 |
|
|
|
2211 |
|
|
end if;
|
2212 |
|
|
|
2213 |
|
|
Analyze (Proper_Body (Unit (N)));
|
2214 |
|
|
Remove_Context (N);
|
2215 |
|
|
|
2216 |
|
|
-- The subunit may contain a with_clause on a sibling of some ancestor.
|
2217 |
|
|
-- Removing the context will remove from visibility those ancestor child
|
2218 |
|
|
-- units, which must be restored to the visibility they have in the
|
2219 |
|
|
-- enclosing body.
|
2220 |
|
|
|
2221 |
|
|
if Present (Enclosing_Child) then
|
2222 |
|
|
declare
|
2223 |
|
|
C : Entity_Id;
|
2224 |
|
|
begin
|
2225 |
|
|
C := Current_Scope;
|
2226 |
|
|
while Present (C)
|
2227 |
|
|
and then Is_Child_Unit (C)
|
2228 |
|
|
loop
|
2229 |
|
|
Set_Is_Immediately_Visible (C);
|
2230 |
|
|
Set_Is_Visible_Child_Unit (C);
|
2231 |
|
|
C := Scope (C);
|
2232 |
|
|
end loop;
|
2233 |
|
|
end;
|
2234 |
|
|
end if;
|
2235 |
|
|
end Analyze_Subunit;
|
2236 |
|
|
|
2237 |
|
|
----------------------------
|
2238 |
|
|
-- Analyze_Task_Body_Stub --
|
2239 |
|
|
----------------------------
|
2240 |
|
|
|
2241 |
|
|
procedure Analyze_Task_Body_Stub (N : Node_Id) is
|
2242 |
|
|
Nam : Entity_Id := Current_Entity_In_Scope (Defining_Identifier (N));
|
2243 |
|
|
Loc : constant Source_Ptr := Sloc (N);
|
2244 |
|
|
|
2245 |
|
|
begin
|
2246 |
|
|
Check_Stub_Level (N);
|
2247 |
|
|
|
2248 |
|
|
-- First occurrence of name may have been as an incomplete type
|
2249 |
|
|
|
2250 |
|
|
if Present (Nam) and then Ekind (Nam) = E_Incomplete_Type then
|
2251 |
|
|
Nam := Full_View (Nam);
|
2252 |
|
|
end if;
|
2253 |
|
|
|
2254 |
|
|
if No (Nam) or else not Is_Task_Type (Etype (Nam)) then
|
2255 |
|
|
Error_Msg_N ("missing specification for task body", N);
|
2256 |
|
|
else
|
2257 |
|
|
Set_Scope (Defining_Entity (N), Current_Scope);
|
2258 |
|
|
Generate_Reference (Nam, Defining_Identifier (N), 'b');
|
2259 |
|
|
Set_Has_Completion (Etype (Nam));
|
2260 |
|
|
Analyze_Proper_Body (N, Etype (Nam));
|
2261 |
|
|
|
2262 |
|
|
-- Set elaboration flag to indicate that entity is callable. This
|
2263 |
|
|
-- cannot be done in the expansion of the body itself, because the
|
2264 |
|
|
-- proper body is not in a declarative part. This is only done if
|
2265 |
|
|
-- expansion is active, because the context may be generic and the
|
2266 |
|
|
-- flag not defined yet.
|
2267 |
|
|
|
2268 |
|
|
if Expander_Active then
|
2269 |
|
|
Insert_After (N,
|
2270 |
|
|
Make_Assignment_Statement (Loc,
|
2271 |
|
|
Name =>
|
2272 |
|
|
Make_Identifier (Loc,
|
2273 |
|
|
New_External_Name (Chars (Etype (Nam)), 'E')),
|
2274 |
|
|
Expression => New_Reference_To (Standard_True, Loc)));
|
2275 |
|
|
end if;
|
2276 |
|
|
end if;
|
2277 |
|
|
end Analyze_Task_Body_Stub;
|
2278 |
|
|
|
2279 |
|
|
-------------------------
|
2280 |
|
|
-- Analyze_With_Clause --
|
2281 |
|
|
-------------------------
|
2282 |
|
|
|
2283 |
|
|
-- Analyze the declaration of a unit in a with clause. At end, label the
|
2284 |
|
|
-- with clause with the defining entity for the unit.
|
2285 |
|
|
|
2286 |
|
|
procedure Analyze_With_Clause (N : Node_Id) is
|
2287 |
|
|
|
2288 |
|
|
-- Retrieve the original kind of the unit node, before analysis. If it
|
2289 |
|
|
-- is a subprogram instantiation, its analysis below will rewrite the
|
2290 |
|
|
-- node as the declaration of the wrapper package. If the same
|
2291 |
|
|
-- instantiation appears indirectly elsewhere in the context, it will
|
2292 |
|
|
-- have been analyzed already.
|
2293 |
|
|
|
2294 |
|
|
Unit_Kind : constant Node_Kind :=
|
2295 |
|
|
Nkind (Original_Node (Unit (Library_Unit (N))));
|
2296 |
|
|
Nam : constant Node_Id := Name (N);
|
2297 |
|
|
E_Name : Entity_Id;
|
2298 |
|
|
Par_Name : Entity_Id;
|
2299 |
|
|
Pref : Node_Id;
|
2300 |
|
|
U : Node_Id;
|
2301 |
|
|
|
2302 |
|
|
Intunit : Boolean;
|
2303 |
|
|
-- Set True if the unit currently being compiled is an internal unit
|
2304 |
|
|
|
2305 |
|
|
Save_Style_Check : constant Boolean := Opt.Style_Check;
|
2306 |
|
|
Save_C_Restrict : constant Save_Cunit_Boolean_Restrictions :=
|
2307 |
|
|
Cunit_Boolean_Restrictions_Save;
|
2308 |
|
|
|
2309 |
|
|
begin
|
2310 |
|
|
U := Unit (Library_Unit (N));
|
2311 |
|
|
|
2312 |
|
|
-- Several actions are skipped for dummy packages (those supplied for
|
2313 |
|
|
-- with's where no matching file could be found). Such packages are
|
2314 |
|
|
-- identified by the Sloc value being set to No_Location.
|
2315 |
|
|
|
2316 |
|
|
if Limited_Present (N) then
|
2317 |
|
|
|
2318 |
|
|
-- Ada 2005 (AI-50217): Build visibility structures but do not
|
2319 |
|
|
-- analyze the unit.
|
2320 |
|
|
|
2321 |
|
|
if Sloc (U) /= No_Location then
|
2322 |
|
|
Build_Limited_Views (N);
|
2323 |
|
|
end if;
|
2324 |
|
|
|
2325 |
|
|
return;
|
2326 |
|
|
end if;
|
2327 |
|
|
|
2328 |
|
|
-- We reset ordinary style checking during the analysis of a with'ed
|
2329 |
|
|
-- unit, but we do NOT reset GNAT special analysis mode (the latter
|
2330 |
|
|
-- definitely *does* apply to with'ed units).
|
2331 |
|
|
|
2332 |
|
|
if not GNAT_Mode then
|
2333 |
|
|
Style_Check := False;
|
2334 |
|
|
end if;
|
2335 |
|
|
|
2336 |
|
|
-- If the library unit is a predefined unit, and we are in high
|
2337 |
|
|
-- integrity mode, then temporarily reset Configurable_Run_Time_Mode
|
2338 |
|
|
-- for the analysis of the with'ed unit. This mode does not prevent
|
2339 |
|
|
-- explicit with'ing of run-time units.
|
2340 |
|
|
|
2341 |
|
|
if Configurable_Run_Time_Mode
|
2342 |
|
|
and then
|
2343 |
|
|
Is_Predefined_File_Name
|
2344 |
|
|
(Unit_File_Name (Get_Source_Unit (Unit (Library_Unit (N)))))
|
2345 |
|
|
then
|
2346 |
|
|
Configurable_Run_Time_Mode := False;
|
2347 |
|
|
Semantics (Library_Unit (N));
|
2348 |
|
|
Configurable_Run_Time_Mode := True;
|
2349 |
|
|
|
2350 |
|
|
else
|
2351 |
|
|
Semantics (Library_Unit (N));
|
2352 |
|
|
end if;
|
2353 |
|
|
|
2354 |
|
|
Intunit := Is_Internal_File_Name (Unit_File_Name (Current_Sem_Unit));
|
2355 |
|
|
|
2356 |
|
|
if Sloc (U) /= No_Location then
|
2357 |
|
|
|
2358 |
|
|
-- Check restrictions, except that we skip the check if this is an
|
2359 |
|
|
-- internal unit unless we are compiling the internal unit as the
|
2360 |
|
|
-- main unit. We also skip this for dummy packages.
|
2361 |
|
|
|
2362 |
|
|
Check_Restriction_No_Dependence (Nam, N);
|
2363 |
|
|
|
2364 |
|
|
if not Intunit or else Current_Sem_Unit = Main_Unit then
|
2365 |
|
|
Check_Restricted_Unit (Unit_Name (Get_Source_Unit (U)), N);
|
2366 |
|
|
end if;
|
2367 |
|
|
|
2368 |
|
|
-- Deal with special case of GNAT.Current_Exceptions which interacts
|
2369 |
|
|
-- with the optimization of local raise statements into gotos.
|
2370 |
|
|
|
2371 |
|
|
if Nkind (Nam) = N_Selected_Component
|
2372 |
|
|
and then Nkind (Prefix (Nam)) = N_Identifier
|
2373 |
|
|
and then Chars (Prefix (Nam)) = Name_Gnat
|
2374 |
|
|
and then (Chars (Selector_Name (Nam)) = Name_Most_Recent_Exception
|
2375 |
|
|
or else
|
2376 |
|
|
Chars (Selector_Name (Nam)) = Name_Exception_Traces)
|
2377 |
|
|
then
|
2378 |
|
|
Check_Restriction (No_Exception_Propagation, N);
|
2379 |
|
|
Special_Exception_Package_Used := True;
|
2380 |
|
|
end if;
|
2381 |
|
|
|
2382 |
|
|
-- Check for inappropriate with of internal implementation unit if we
|
2383 |
|
|
-- are not compiling an internal unit. We do not issue this message
|
2384 |
|
|
-- for implicit with's generated by the compiler itself.
|
2385 |
|
|
|
2386 |
|
|
if Implementation_Unit_Warnings
|
2387 |
|
|
and then not Intunit
|
2388 |
|
|
and then not Implicit_With (N)
|
2389 |
|
|
then
|
2390 |
|
|
declare
|
2391 |
|
|
U_Kind : constant Kind_Of_Unit :=
|
2392 |
|
|
Get_Kind_Of_Unit (Get_Source_Unit (U));
|
2393 |
|
|
|
2394 |
|
|
begin
|
2395 |
|
|
if U_Kind = Implementation_Unit then
|
2396 |
|
|
Error_Msg_F ("& is an internal 'G'N'A'T unit?", Name (N));
|
2397 |
|
|
|
2398 |
|
|
-- Add alternative name if available, otherwise issue a
|
2399 |
|
|
-- general warning message.
|
2400 |
|
|
|
2401 |
|
|
if Error_Msg_Strlen /= 0 then
|
2402 |
|
|
Error_Msg_F ("\use ""~"" instead", Name (N));
|
2403 |
|
|
else
|
2404 |
|
|
Error_Msg_F
|
2405 |
|
|
("\use of this unit is non-portable " &
|
2406 |
|
|
"and version-dependent?", Name (N));
|
2407 |
|
|
end if;
|
2408 |
|
|
|
2409 |
|
|
elsif U_Kind = Ada_05_Unit
|
2410 |
|
|
and then Ada_Version < Ada_05
|
2411 |
|
|
and then Warn_On_Ada_2005_Compatibility
|
2412 |
|
|
then
|
2413 |
|
|
Error_Msg_N ("& is an Ada 2005 unit?", Name (N));
|
2414 |
|
|
end if;
|
2415 |
|
|
end;
|
2416 |
|
|
end if;
|
2417 |
|
|
end if;
|
2418 |
|
|
|
2419 |
|
|
-- Semantic analysis of a generic unit is performed on a copy of
|
2420 |
|
|
-- the original tree. Retrieve the entity on which semantic info
|
2421 |
|
|
-- actually appears.
|
2422 |
|
|
|
2423 |
|
|
if Unit_Kind in N_Generic_Declaration then
|
2424 |
|
|
E_Name := Defining_Entity (U);
|
2425 |
|
|
|
2426 |
|
|
-- Note: in the following test, Unit_Kind is the original Nkind, but in
|
2427 |
|
|
-- the case of an instantiation, semantic analysis above will have
|
2428 |
|
|
-- replaced the unit by its instantiated version. If the instance body
|
2429 |
|
|
-- has been generated, the instance now denotes the body entity. For
|
2430 |
|
|
-- visibility purposes we need the entity of its spec.
|
2431 |
|
|
|
2432 |
|
|
elsif (Unit_Kind = N_Package_Instantiation
|
2433 |
|
|
or else Nkind (Original_Node (Unit (Library_Unit (N)))) =
|
2434 |
|
|
N_Package_Instantiation)
|
2435 |
|
|
and then Nkind (U) = N_Package_Body
|
2436 |
|
|
then
|
2437 |
|
|
E_Name := Corresponding_Spec (U);
|
2438 |
|
|
|
2439 |
|
|
elsif Unit_Kind = N_Package_Instantiation
|
2440 |
|
|
and then Nkind (U) = N_Package_Instantiation
|
2441 |
|
|
then
|
2442 |
|
|
-- If the instance has not been rewritten as a package declaration,
|
2443 |
|
|
-- then it appeared already in a previous with clause. Retrieve
|
2444 |
|
|
-- the entity from the previous instance.
|
2445 |
|
|
|
2446 |
|
|
E_Name := Defining_Entity (Specification (Instance_Spec (U)));
|
2447 |
|
|
|
2448 |
|
|
elsif Unit_Kind in N_Subprogram_Instantiation then
|
2449 |
|
|
|
2450 |
|
|
-- The visible subprogram is created during instantiation, and is
|
2451 |
|
|
-- an attribute of the wrapper package. We retrieve the wrapper
|
2452 |
|
|
-- package directly from the instantiation node. If the instance
|
2453 |
|
|
-- is inlined the unit is still an instantiation. Otherwise it has
|
2454 |
|
|
-- been rewritten as the declaration of the wrapper itself.
|
2455 |
|
|
|
2456 |
|
|
if Nkind (U) in N_Subprogram_Instantiation then
|
2457 |
|
|
E_Name :=
|
2458 |
|
|
Related_Instance
|
2459 |
|
|
(Defining_Entity (Specification (Instance_Spec (U))));
|
2460 |
|
|
else
|
2461 |
|
|
E_Name := Related_Instance (Defining_Entity (U));
|
2462 |
|
|
end if;
|
2463 |
|
|
|
2464 |
|
|
elsif Unit_Kind = N_Package_Renaming_Declaration
|
2465 |
|
|
or else Unit_Kind in N_Generic_Renaming_Declaration
|
2466 |
|
|
then
|
2467 |
|
|
E_Name := Defining_Entity (U);
|
2468 |
|
|
|
2469 |
|
|
elsif Unit_Kind = N_Subprogram_Body
|
2470 |
|
|
and then Nkind (Name (N)) = N_Selected_Component
|
2471 |
|
|
and then not Acts_As_Spec (Library_Unit (N))
|
2472 |
|
|
then
|
2473 |
|
|
-- For a child unit that has no spec, one has been created and
|
2474 |
|
|
-- analyzed. The entity required is that of the spec.
|
2475 |
|
|
|
2476 |
|
|
E_Name := Corresponding_Spec (U);
|
2477 |
|
|
|
2478 |
|
|
else
|
2479 |
|
|
E_Name := Defining_Entity (U);
|
2480 |
|
|
end if;
|
2481 |
|
|
|
2482 |
|
|
if Nkind (Name (N)) = N_Selected_Component then
|
2483 |
|
|
|
2484 |
|
|
-- Child unit in a with clause
|
2485 |
|
|
|
2486 |
|
|
Change_Selected_Component_To_Expanded_Name (Name (N));
|
2487 |
|
|
end if;
|
2488 |
|
|
|
2489 |
|
|
-- Restore style checks and restrictions
|
2490 |
|
|
|
2491 |
|
|
Style_Check := Save_Style_Check;
|
2492 |
|
|
Cunit_Boolean_Restrictions_Restore (Save_C_Restrict);
|
2493 |
|
|
|
2494 |
|
|
-- Record the reference, but do NOT set the unit as referenced, we want
|
2495 |
|
|
-- to consider the unit as unreferenced if this is the only reference
|
2496 |
|
|
-- that occurs.
|
2497 |
|
|
|
2498 |
|
|
Set_Entity_With_Style_Check (Name (N), E_Name);
|
2499 |
|
|
Generate_Reference (E_Name, Name (N), 'w', Set_Ref => False);
|
2500 |
|
|
|
2501 |
|
|
-- Generate references and check No_Dependence restriction for parents
|
2502 |
|
|
|
2503 |
|
|
if Is_Child_Unit (E_Name) then
|
2504 |
|
|
Pref := Prefix (Name (N));
|
2505 |
|
|
Par_Name := Scope (E_Name);
|
2506 |
|
|
while Nkind (Pref) = N_Selected_Component loop
|
2507 |
|
|
Change_Selected_Component_To_Expanded_Name (Pref);
|
2508 |
|
|
Set_Entity_With_Style_Check (Pref, Par_Name);
|
2509 |
|
|
|
2510 |
|
|
Generate_Reference (Par_Name, Pref);
|
2511 |
|
|
Check_Restriction_No_Dependence (Pref, N);
|
2512 |
|
|
Pref := Prefix (Pref);
|
2513 |
|
|
|
2514 |
|
|
-- If E_Name is the dummy entity for a nonexistent unit, its scope
|
2515 |
|
|
-- is set to Standard_Standard, and no attempt should be made to
|
2516 |
|
|
-- further unwind scopes.
|
2517 |
|
|
|
2518 |
|
|
if Par_Name /= Standard_Standard then
|
2519 |
|
|
Par_Name := Scope (Par_Name);
|
2520 |
|
|
end if;
|
2521 |
|
|
end loop;
|
2522 |
|
|
|
2523 |
|
|
if Present (Entity (Pref))
|
2524 |
|
|
and then not Analyzed (Parent (Parent (Entity (Pref))))
|
2525 |
|
|
then
|
2526 |
|
|
-- If the entity is set without its unit being compiled, the
|
2527 |
|
|
-- original parent is a renaming, and Par_Name is the renamed
|
2528 |
|
|
-- entity. For visibility purposes, we need the original entity,
|
2529 |
|
|
-- which must be analyzed now because Load_Unit directly retrieves
|
2530 |
|
|
-- the renamed unit, and the renaming declaration itself has not
|
2531 |
|
|
-- been analyzed.
|
2532 |
|
|
|
2533 |
|
|
Analyze (Parent (Parent (Entity (Pref))));
|
2534 |
|
|
pragma Assert (Renamed_Object (Entity (Pref)) = Par_Name);
|
2535 |
|
|
Par_Name := Entity (Pref);
|
2536 |
|
|
end if;
|
2537 |
|
|
|
2538 |
|
|
Set_Entity_With_Style_Check (Pref, Par_Name);
|
2539 |
|
|
Generate_Reference (Par_Name, Pref);
|
2540 |
|
|
end if;
|
2541 |
|
|
|
2542 |
|
|
-- If the withed unit is System, and a system extension pragma is
|
2543 |
|
|
-- present, compile the extension now, rather than waiting for a
|
2544 |
|
|
-- visibility check on a specific entity.
|
2545 |
|
|
|
2546 |
|
|
if Chars (E_Name) = Name_System
|
2547 |
|
|
and then Scope (E_Name) = Standard_Standard
|
2548 |
|
|
and then Present (System_Extend_Unit)
|
2549 |
|
|
and then Present_System_Aux (N)
|
2550 |
|
|
then
|
2551 |
|
|
-- If the extension is not present, an error will have been emitted
|
2552 |
|
|
|
2553 |
|
|
null;
|
2554 |
|
|
end if;
|
2555 |
|
|
|
2556 |
|
|
-- Ada 2005 (AI-262): Remove from visibility the entity corresponding
|
2557 |
|
|
-- to private_with units; they will be made visible later (just before
|
2558 |
|
|
-- the private part is analyzed)
|
2559 |
|
|
|
2560 |
|
|
if Private_Present (N) then
|
2561 |
|
|
Set_Is_Immediately_Visible (E_Name, False);
|
2562 |
|
|
end if;
|
2563 |
|
|
end Analyze_With_Clause;
|
2564 |
|
|
|
2565 |
|
|
------------------------------
|
2566 |
|
|
-- Check_Private_Child_Unit --
|
2567 |
|
|
------------------------------
|
2568 |
|
|
|
2569 |
|
|
procedure Check_Private_Child_Unit (N : Node_Id) is
|
2570 |
|
|
Lib_Unit : constant Node_Id := Unit (N);
|
2571 |
|
|
Item : Node_Id;
|
2572 |
|
|
Curr_Unit : Entity_Id;
|
2573 |
|
|
Sub_Parent : Node_Id;
|
2574 |
|
|
Priv_Child : Entity_Id;
|
2575 |
|
|
Par_Lib : Entity_Id;
|
2576 |
|
|
Par_Spec : Node_Id;
|
2577 |
|
|
|
2578 |
|
|
function Is_Private_Library_Unit (Unit : Entity_Id) return Boolean;
|
2579 |
|
|
-- Returns true if and only if the library unit is declared with
|
2580 |
|
|
-- an explicit designation of private.
|
2581 |
|
|
|
2582 |
|
|
-----------------------------
|
2583 |
|
|
-- Is_Private_Library_Unit --
|
2584 |
|
|
-----------------------------
|
2585 |
|
|
|
2586 |
|
|
function Is_Private_Library_Unit (Unit : Entity_Id) return Boolean is
|
2587 |
|
|
Comp_Unit : constant Node_Id := Parent (Unit_Declaration_Node (Unit));
|
2588 |
|
|
|
2589 |
|
|
begin
|
2590 |
|
|
return Private_Present (Comp_Unit);
|
2591 |
|
|
end Is_Private_Library_Unit;
|
2592 |
|
|
|
2593 |
|
|
-- Start of processing for Check_Private_Child_Unit
|
2594 |
|
|
|
2595 |
|
|
begin
|
2596 |
|
|
if Nkind_In (Lib_Unit, N_Package_Body, N_Subprogram_Body) then
|
2597 |
|
|
Curr_Unit := Defining_Entity (Unit (Library_Unit (N)));
|
2598 |
|
|
Par_Lib := Curr_Unit;
|
2599 |
|
|
|
2600 |
|
|
elsif Nkind (Lib_Unit) = N_Subunit then
|
2601 |
|
|
|
2602 |
|
|
-- The parent is itself a body. The parent entity is to be found in
|
2603 |
|
|
-- the corresponding spec.
|
2604 |
|
|
|
2605 |
|
|
Sub_Parent := Library_Unit (N);
|
2606 |
|
|
Curr_Unit := Defining_Entity (Unit (Library_Unit (Sub_Parent)));
|
2607 |
|
|
|
2608 |
|
|
-- If the parent itself is a subunit, Curr_Unit is the entity
|
2609 |
|
|
-- of the enclosing body, retrieve the spec entity which is
|
2610 |
|
|
-- the proper ancestor we need for the following tests.
|
2611 |
|
|
|
2612 |
|
|
if Ekind (Curr_Unit) = E_Package_Body then
|
2613 |
|
|
Curr_Unit := Spec_Entity (Curr_Unit);
|
2614 |
|
|
end if;
|
2615 |
|
|
|
2616 |
|
|
Par_Lib := Curr_Unit;
|
2617 |
|
|
|
2618 |
|
|
else
|
2619 |
|
|
Curr_Unit := Defining_Entity (Lib_Unit);
|
2620 |
|
|
|
2621 |
|
|
Par_Lib := Curr_Unit;
|
2622 |
|
|
Par_Spec := Parent_Spec (Lib_Unit);
|
2623 |
|
|
|
2624 |
|
|
if No (Par_Spec) then
|
2625 |
|
|
Par_Lib := Empty;
|
2626 |
|
|
else
|
2627 |
|
|
Par_Lib := Defining_Entity (Unit (Par_Spec));
|
2628 |
|
|
end if;
|
2629 |
|
|
end if;
|
2630 |
|
|
|
2631 |
|
|
-- Loop through context items
|
2632 |
|
|
|
2633 |
|
|
Item := First (Context_Items (N));
|
2634 |
|
|
while Present (Item) loop
|
2635 |
|
|
|
2636 |
|
|
-- Ada 2005 (AI-262): Allow private_with of a private child package
|
2637 |
|
|
-- in public siblings
|
2638 |
|
|
|
2639 |
|
|
if Nkind (Item) = N_With_Clause
|
2640 |
|
|
and then not Implicit_With (Item)
|
2641 |
|
|
and then not Limited_Present (Item)
|
2642 |
|
|
and then Is_Private_Descendant (Entity (Name (Item)))
|
2643 |
|
|
then
|
2644 |
|
|
Priv_Child := Entity (Name (Item));
|
2645 |
|
|
|
2646 |
|
|
declare
|
2647 |
|
|
Curr_Parent : Entity_Id := Par_Lib;
|
2648 |
|
|
Child_Parent : Entity_Id := Scope (Priv_Child);
|
2649 |
|
|
Prv_Ancestor : Entity_Id := Child_Parent;
|
2650 |
|
|
Curr_Private : Boolean := Is_Private_Library_Unit (Curr_Unit);
|
2651 |
|
|
|
2652 |
|
|
begin
|
2653 |
|
|
-- If the child unit is a public child then locate the nearest
|
2654 |
|
|
-- private ancestor. Child_Parent will then be set to the
|
2655 |
|
|
-- parent of that ancestor.
|
2656 |
|
|
|
2657 |
|
|
if not Is_Private_Library_Unit (Priv_Child) then
|
2658 |
|
|
while Present (Prv_Ancestor)
|
2659 |
|
|
and then not Is_Private_Library_Unit (Prv_Ancestor)
|
2660 |
|
|
loop
|
2661 |
|
|
Prv_Ancestor := Scope (Prv_Ancestor);
|
2662 |
|
|
end loop;
|
2663 |
|
|
|
2664 |
|
|
if Present (Prv_Ancestor) then
|
2665 |
|
|
Child_Parent := Scope (Prv_Ancestor);
|
2666 |
|
|
end if;
|
2667 |
|
|
end if;
|
2668 |
|
|
|
2669 |
|
|
while Present (Curr_Parent)
|
2670 |
|
|
and then Curr_Parent /= Standard_Standard
|
2671 |
|
|
and then Curr_Parent /= Child_Parent
|
2672 |
|
|
loop
|
2673 |
|
|
Curr_Private :=
|
2674 |
|
|
Curr_Private or else Is_Private_Library_Unit (Curr_Parent);
|
2675 |
|
|
Curr_Parent := Scope (Curr_Parent);
|
2676 |
|
|
end loop;
|
2677 |
|
|
|
2678 |
|
|
if No (Curr_Parent) then
|
2679 |
|
|
Curr_Parent := Standard_Standard;
|
2680 |
|
|
end if;
|
2681 |
|
|
|
2682 |
|
|
if Curr_Parent /= Child_Parent then
|
2683 |
|
|
if Ekind (Priv_Child) = E_Generic_Package
|
2684 |
|
|
and then Chars (Priv_Child) in Text_IO_Package_Name
|
2685 |
|
|
and then Chars (Scope (Scope (Priv_Child))) = Name_Ada
|
2686 |
|
|
then
|
2687 |
|
|
Error_Msg_NE
|
2688 |
|
|
("& is a nested package, not a compilation unit",
|
2689 |
|
|
Name (Item), Priv_Child);
|
2690 |
|
|
|
2691 |
|
|
else
|
2692 |
|
|
Error_Msg_N
|
2693 |
|
|
("unit in with clause is private child unit!", Item);
|
2694 |
|
|
Error_Msg_NE
|
2695 |
|
|
("\current unit must also have parent&!",
|
2696 |
|
|
Item, Child_Parent);
|
2697 |
|
|
end if;
|
2698 |
|
|
|
2699 |
|
|
elsif Curr_Private
|
2700 |
|
|
or else Private_Present (Item)
|
2701 |
|
|
or else Nkind_In (Lib_Unit, N_Package_Body, N_Subunit)
|
2702 |
|
|
or else (Nkind (Lib_Unit) = N_Subprogram_Body
|
2703 |
|
|
and then not Acts_As_Spec (Parent (Lib_Unit)))
|
2704 |
|
|
then
|
2705 |
|
|
null;
|
2706 |
|
|
|
2707 |
|
|
else
|
2708 |
|
|
Error_Msg_NE
|
2709 |
|
|
("current unit must also be private descendant of&",
|
2710 |
|
|
Item, Child_Parent);
|
2711 |
|
|
end if;
|
2712 |
|
|
end;
|
2713 |
|
|
end if;
|
2714 |
|
|
|
2715 |
|
|
Next (Item);
|
2716 |
|
|
end loop;
|
2717 |
|
|
|
2718 |
|
|
end Check_Private_Child_Unit;
|
2719 |
|
|
|
2720 |
|
|
----------------------
|
2721 |
|
|
-- Check_Stub_Level --
|
2722 |
|
|
----------------------
|
2723 |
|
|
|
2724 |
|
|
procedure Check_Stub_Level (N : Node_Id) is
|
2725 |
|
|
Par : constant Node_Id := Parent (N);
|
2726 |
|
|
Kind : constant Node_Kind := Nkind (Par);
|
2727 |
|
|
|
2728 |
|
|
begin
|
2729 |
|
|
if Nkind_In (Kind, N_Package_Body,
|
2730 |
|
|
N_Subprogram_Body,
|
2731 |
|
|
N_Task_Body,
|
2732 |
|
|
N_Protected_Body)
|
2733 |
|
|
and then Nkind_In (Parent (Par), N_Compilation_Unit, N_Subunit)
|
2734 |
|
|
then
|
2735 |
|
|
null;
|
2736 |
|
|
|
2737 |
|
|
-- In an instance, a missing stub appears at any level. A warning
|
2738 |
|
|
-- message will have been emitted already for the missing file.
|
2739 |
|
|
|
2740 |
|
|
elsif not In_Instance then
|
2741 |
|
|
Error_Msg_N ("stub cannot appear in an inner scope", N);
|
2742 |
|
|
|
2743 |
|
|
elsif Expander_Active then
|
2744 |
|
|
Error_Msg_N ("missing proper body", N);
|
2745 |
|
|
end if;
|
2746 |
|
|
end Check_Stub_Level;
|
2747 |
|
|
|
2748 |
|
|
------------------------
|
2749 |
|
|
-- Expand_With_Clause --
|
2750 |
|
|
------------------------
|
2751 |
|
|
|
2752 |
|
|
procedure Expand_With_Clause (Item : Node_Id; Nam : Node_Id; N : Node_Id) is
|
2753 |
|
|
Loc : constant Source_Ptr := Sloc (Nam);
|
2754 |
|
|
Ent : constant Entity_Id := Entity (Nam);
|
2755 |
|
|
Withn : Node_Id;
|
2756 |
|
|
P : Node_Id;
|
2757 |
|
|
|
2758 |
|
|
function Build_Unit_Name (Nam : Node_Id) return Node_Id;
|
2759 |
|
|
-- Build name to be used in implicit with_clause. In most cases this
|
2760 |
|
|
-- is the source name, but if renamings are present we must make the
|
2761 |
|
|
-- original unit visible, not the one it renames. The entity in the
|
2762 |
|
|
-- with clause is the renamed unit, but the identifier is the one from
|
2763 |
|
|
-- the source, which allows us to recover the unit renaming.
|
2764 |
|
|
|
2765 |
|
|
---------------------
|
2766 |
|
|
-- Build_Unit_Name --
|
2767 |
|
|
---------------------
|
2768 |
|
|
|
2769 |
|
|
function Build_Unit_Name (Nam : Node_Id) return Node_Id is
|
2770 |
|
|
Ent : Entity_Id;
|
2771 |
|
|
Renaming : Entity_Id;
|
2772 |
|
|
Result : Node_Id;
|
2773 |
|
|
|
2774 |
|
|
begin
|
2775 |
|
|
if Nkind (Nam) = N_Identifier then
|
2776 |
|
|
|
2777 |
|
|
-- If the parent unit P in the name of the with_clause for P.Q
|
2778 |
|
|
-- is a renaming of package R, then the entity of the parent is
|
2779 |
|
|
-- set to R, but the identifier retains Chars (P) to be consistent
|
2780 |
|
|
-- with the source (see details in lib-load). However, the
|
2781 |
|
|
-- implicit_with_clause for the parent must make the entity for
|
2782 |
|
|
-- P visible, because P.Q may be used as a prefix within the
|
2783 |
|
|
-- current unit. The entity for P is the current_entity with that
|
2784 |
|
|
-- name, because the package renaming declaration for it has just
|
2785 |
|
|
-- been analyzed. Note that this case can only happen if P.Q has
|
2786 |
|
|
-- already appeared in a previous with_clause in a related unit,
|
2787 |
|
|
-- such as the library body of the current unit.
|
2788 |
|
|
|
2789 |
|
|
if Chars (Nam) /= Chars (Entity (Nam)) then
|
2790 |
|
|
Renaming := Current_Entity (Nam);
|
2791 |
|
|
pragma Assert (Renamed_Entity (Renaming) = Entity (Nam));
|
2792 |
|
|
return New_Occurrence_Of (Renaming, Loc);
|
2793 |
|
|
|
2794 |
|
|
else
|
2795 |
|
|
return New_Occurrence_Of (Entity (Nam), Loc);
|
2796 |
|
|
end if;
|
2797 |
|
|
|
2798 |
|
|
else
|
2799 |
|
|
Ent := Entity (Nam);
|
2800 |
|
|
|
2801 |
|
|
if Present (Entity (Selector_Name (Nam)))
|
2802 |
|
|
and then Chars (Entity (Selector_Name (Nam))) /= Chars (Ent)
|
2803 |
|
|
and then
|
2804 |
|
|
Nkind (Unit_Declaration_Node (Entity (Selector_Name (Nam))))
|
2805 |
|
|
= N_Package_Renaming_Declaration
|
2806 |
|
|
then
|
2807 |
|
|
-- The name in the with_clause is of the form A.B.C, and B
|
2808 |
|
|
-- is given by a renaming declaration. In that case we may
|
2809 |
|
|
-- not have analyzed the unit for B, but replaced it directly
|
2810 |
|
|
-- in lib-load with the unit it renames. We have to make A.B
|
2811 |
|
|
-- visible, so analyze the declaration for B now, in case it
|
2812 |
|
|
-- has not been done yet.
|
2813 |
|
|
|
2814 |
|
|
Ent := Entity (Selector_Name (Nam));
|
2815 |
|
|
Analyze
|
2816 |
|
|
(Parent
|
2817 |
|
|
(Unit_Declaration_Node (Entity (Selector_Name (Nam)))));
|
2818 |
|
|
end if;
|
2819 |
|
|
|
2820 |
|
|
Result :=
|
2821 |
|
|
Make_Expanded_Name (Loc,
|
2822 |
|
|
Chars => Chars (Entity (Nam)),
|
2823 |
|
|
Prefix => Build_Unit_Name (Prefix (Nam)),
|
2824 |
|
|
Selector_Name => New_Occurrence_Of (Ent, Loc));
|
2825 |
|
|
Set_Entity (Result, Ent);
|
2826 |
|
|
return Result;
|
2827 |
|
|
end if;
|
2828 |
|
|
end Build_Unit_Name;
|
2829 |
|
|
|
2830 |
|
|
-- Start of processing for Expand_With_Clause
|
2831 |
|
|
|
2832 |
|
|
begin
|
2833 |
|
|
New_Nodes_OK := New_Nodes_OK + 1;
|
2834 |
|
|
Withn :=
|
2835 |
|
|
Make_With_Clause (Loc,
|
2836 |
|
|
Name => Build_Unit_Name (Nam));
|
2837 |
|
|
|
2838 |
|
|
P := Parent (Unit_Declaration_Node (Ent));
|
2839 |
|
|
Set_Library_Unit (Withn, P);
|
2840 |
|
|
Set_Corresponding_Spec (Withn, Ent);
|
2841 |
|
|
Set_First_Name (Withn, True);
|
2842 |
|
|
Set_Implicit_With (Withn, True);
|
2843 |
|
|
|
2844 |
|
|
-- If the unit is a package declaration, a private_with_clause on a
|
2845 |
|
|
-- child unit implies the implicit with on the parent is also private.
|
2846 |
|
|
|
2847 |
|
|
if Nkind (Unit (N)) = N_Package_Declaration then
|
2848 |
|
|
Set_Private_Present (Withn, Private_Present (Item));
|
2849 |
|
|
end if;
|
2850 |
|
|
|
2851 |
|
|
Prepend (Withn, Context_Items (N));
|
2852 |
|
|
Mark_Rewrite_Insertion (Withn);
|
2853 |
|
|
Install_Withed_Unit (Withn);
|
2854 |
|
|
|
2855 |
|
|
if Nkind (Nam) = N_Expanded_Name then
|
2856 |
|
|
Expand_With_Clause (Item, Prefix (Nam), N);
|
2857 |
|
|
end if;
|
2858 |
|
|
|
2859 |
|
|
New_Nodes_OK := New_Nodes_OK - 1;
|
2860 |
|
|
end Expand_With_Clause;
|
2861 |
|
|
|
2862 |
|
|
-----------------------
|
2863 |
|
|
-- Get_Parent_Entity --
|
2864 |
|
|
-----------------------
|
2865 |
|
|
|
2866 |
|
|
function Get_Parent_Entity (Unit : Node_Id) return Entity_Id is
|
2867 |
|
|
begin
|
2868 |
|
|
if Nkind (Unit) = N_Package_Body
|
2869 |
|
|
and then Nkind (Original_Node (Unit)) = N_Package_Instantiation
|
2870 |
|
|
then
|
2871 |
|
|
return Defining_Entity
|
2872 |
|
|
(Specification (Instance_Spec (Original_Node (Unit))));
|
2873 |
|
|
elsif Nkind (Unit) = N_Package_Instantiation then
|
2874 |
|
|
return Defining_Entity (Specification (Instance_Spec (Unit)));
|
2875 |
|
|
else
|
2876 |
|
|
return Defining_Entity (Unit);
|
2877 |
|
|
end if;
|
2878 |
|
|
end Get_Parent_Entity;
|
2879 |
|
|
|
2880 |
|
|
---------------------
|
2881 |
|
|
-- Has_With_Clause --
|
2882 |
|
|
---------------------
|
2883 |
|
|
|
2884 |
|
|
function Has_With_Clause
|
2885 |
|
|
(C_Unit : Node_Id;
|
2886 |
|
|
Pack : Entity_Id;
|
2887 |
|
|
Is_Limited : Boolean := False) return Boolean
|
2888 |
|
|
is
|
2889 |
|
|
Item : Node_Id;
|
2890 |
|
|
|
2891 |
|
|
function Named_Unit (Clause : Node_Id) return Entity_Id;
|
2892 |
|
|
-- Return the entity for the unit named in a [limited] with clause
|
2893 |
|
|
|
2894 |
|
|
----------------
|
2895 |
|
|
-- Named_Unit --
|
2896 |
|
|
----------------
|
2897 |
|
|
|
2898 |
|
|
function Named_Unit (Clause : Node_Id) return Entity_Id is
|
2899 |
|
|
begin
|
2900 |
|
|
if Nkind (Name (Clause)) = N_Selected_Component then
|
2901 |
|
|
return Entity (Selector_Name (Name (Clause)));
|
2902 |
|
|
else
|
2903 |
|
|
return Entity (Name (Clause));
|
2904 |
|
|
end if;
|
2905 |
|
|
end Named_Unit;
|
2906 |
|
|
|
2907 |
|
|
-- Start of processing for Has_With_Clause
|
2908 |
|
|
|
2909 |
|
|
begin
|
2910 |
|
|
if Present (Context_Items (C_Unit)) then
|
2911 |
|
|
Item := First (Context_Items (C_Unit));
|
2912 |
|
|
while Present (Item) loop
|
2913 |
|
|
if Nkind (Item) = N_With_Clause
|
2914 |
|
|
and then Limited_Present (Item) = Is_Limited
|
2915 |
|
|
and then Named_Unit (Item) = Pack
|
2916 |
|
|
then
|
2917 |
|
|
return True;
|
2918 |
|
|
end if;
|
2919 |
|
|
|
2920 |
|
|
Next (Item);
|
2921 |
|
|
end loop;
|
2922 |
|
|
end if;
|
2923 |
|
|
|
2924 |
|
|
return False;
|
2925 |
|
|
end Has_With_Clause;
|
2926 |
|
|
|
2927 |
|
|
-----------------------------
|
2928 |
|
|
-- Implicit_With_On_Parent --
|
2929 |
|
|
-----------------------------
|
2930 |
|
|
|
2931 |
|
|
procedure Implicit_With_On_Parent
|
2932 |
|
|
(Child_Unit : Node_Id;
|
2933 |
|
|
N : Node_Id)
|
2934 |
|
|
is
|
2935 |
|
|
Loc : constant Source_Ptr := Sloc (N);
|
2936 |
|
|
P : constant Node_Id := Parent_Spec (Child_Unit);
|
2937 |
|
|
P_Unit : Node_Id := Unit (P);
|
2938 |
|
|
P_Name : constant Entity_Id := Get_Parent_Entity (P_Unit);
|
2939 |
|
|
Withn : Node_Id;
|
2940 |
|
|
|
2941 |
|
|
function Build_Ancestor_Name (P : Node_Id) return Node_Id;
|
2942 |
|
|
-- Build prefix of child unit name. Recurse if needed
|
2943 |
|
|
|
2944 |
|
|
function Build_Unit_Name return Node_Id;
|
2945 |
|
|
-- If the unit is a child unit, build qualified name with all ancestors
|
2946 |
|
|
|
2947 |
|
|
-------------------------
|
2948 |
|
|
-- Build_Ancestor_Name --
|
2949 |
|
|
-------------------------
|
2950 |
|
|
|
2951 |
|
|
function Build_Ancestor_Name (P : Node_Id) return Node_Id is
|
2952 |
|
|
P_Ref : constant Node_Id :=
|
2953 |
|
|
New_Reference_To (Defining_Entity (P), Loc);
|
2954 |
|
|
P_Spec : Node_Id := P;
|
2955 |
|
|
|
2956 |
|
|
begin
|
2957 |
|
|
-- Ancestor may have been rewritten as a package body. Retrieve
|
2958 |
|
|
-- the original spec to trace earlier ancestors.
|
2959 |
|
|
|
2960 |
|
|
if Nkind (P) = N_Package_Body
|
2961 |
|
|
and then Nkind (Original_Node (P)) = N_Package_Instantiation
|
2962 |
|
|
then
|
2963 |
|
|
P_Spec := Original_Node (P);
|
2964 |
|
|
end if;
|
2965 |
|
|
|
2966 |
|
|
if No (Parent_Spec (P_Spec)) then
|
2967 |
|
|
return P_Ref;
|
2968 |
|
|
else
|
2969 |
|
|
return
|
2970 |
|
|
Make_Selected_Component (Loc,
|
2971 |
|
|
Prefix => Build_Ancestor_Name (Unit (Parent_Spec (P_Spec))),
|
2972 |
|
|
Selector_Name => P_Ref);
|
2973 |
|
|
end if;
|
2974 |
|
|
end Build_Ancestor_Name;
|
2975 |
|
|
|
2976 |
|
|
---------------------
|
2977 |
|
|
-- Build_Unit_Name --
|
2978 |
|
|
---------------------
|
2979 |
|
|
|
2980 |
|
|
function Build_Unit_Name return Node_Id is
|
2981 |
|
|
Result : Node_Id;
|
2982 |
|
|
|
2983 |
|
|
begin
|
2984 |
|
|
if No (Parent_Spec (P_Unit)) then
|
2985 |
|
|
return New_Reference_To (P_Name, Loc);
|
2986 |
|
|
|
2987 |
|
|
else
|
2988 |
|
|
Result :=
|
2989 |
|
|
Make_Expanded_Name (Loc,
|
2990 |
|
|
Chars => Chars (P_Name),
|
2991 |
|
|
Prefix => Build_Ancestor_Name (Unit (Parent_Spec (P_Unit))),
|
2992 |
|
|
Selector_Name => New_Reference_To (P_Name, Loc));
|
2993 |
|
|
Set_Entity (Result, P_Name);
|
2994 |
|
|
return Result;
|
2995 |
|
|
end if;
|
2996 |
|
|
end Build_Unit_Name;
|
2997 |
|
|
|
2998 |
|
|
-- Start of processing for Implicit_With_On_Parent
|
2999 |
|
|
|
3000 |
|
|
begin
|
3001 |
|
|
-- The unit of the current compilation may be a package body that
|
3002 |
|
|
-- replaces an instance node. In this case we need the original instance
|
3003 |
|
|
-- node to construct the proper parent name.
|
3004 |
|
|
|
3005 |
|
|
if Nkind (P_Unit) = N_Package_Body
|
3006 |
|
|
and then Nkind (Original_Node (P_Unit)) = N_Package_Instantiation
|
3007 |
|
|
then
|
3008 |
|
|
P_Unit := Original_Node (P_Unit);
|
3009 |
|
|
end if;
|
3010 |
|
|
|
3011 |
|
|
-- We add the implicit with if the child unit is the current unit being
|
3012 |
|
|
-- compiled. If the current unit is a body, we do not want to add an
|
3013 |
|
|
-- implicit_with a second time to the corresponding spec.
|
3014 |
|
|
|
3015 |
|
|
if Nkind (Child_Unit) = N_Package_Declaration
|
3016 |
|
|
and then Child_Unit /= Unit (Cunit (Current_Sem_Unit))
|
3017 |
|
|
then
|
3018 |
|
|
return;
|
3019 |
|
|
end if;
|
3020 |
|
|
|
3021 |
|
|
New_Nodes_OK := New_Nodes_OK + 1;
|
3022 |
|
|
Withn := Make_With_Clause (Loc, Name => Build_Unit_Name);
|
3023 |
|
|
|
3024 |
|
|
Set_Library_Unit (Withn, P);
|
3025 |
|
|
Set_Corresponding_Spec (Withn, P_Name);
|
3026 |
|
|
Set_First_Name (Withn, True);
|
3027 |
|
|
Set_Implicit_With (Withn, True);
|
3028 |
|
|
|
3029 |
|
|
-- Node is placed at the beginning of the context items, so that
|
3030 |
|
|
-- subsequent use clauses on the parent can be validated.
|
3031 |
|
|
|
3032 |
|
|
Prepend (Withn, Context_Items (N));
|
3033 |
|
|
Mark_Rewrite_Insertion (Withn);
|
3034 |
|
|
Install_Withed_Unit (Withn);
|
3035 |
|
|
|
3036 |
|
|
if Is_Child_Spec (P_Unit) then
|
3037 |
|
|
Implicit_With_On_Parent (P_Unit, N);
|
3038 |
|
|
end if;
|
3039 |
|
|
|
3040 |
|
|
New_Nodes_OK := New_Nodes_OK - 1;
|
3041 |
|
|
end Implicit_With_On_Parent;
|
3042 |
|
|
|
3043 |
|
|
--------------
|
3044 |
|
|
-- In_Chain --
|
3045 |
|
|
--------------
|
3046 |
|
|
|
3047 |
|
|
function In_Chain (E : Entity_Id) return Boolean is
|
3048 |
|
|
H : Entity_Id;
|
3049 |
|
|
|
3050 |
|
|
begin
|
3051 |
|
|
H := Current_Entity (E);
|
3052 |
|
|
while Present (H) loop
|
3053 |
|
|
if H = E then
|
3054 |
|
|
return True;
|
3055 |
|
|
else
|
3056 |
|
|
H := Homonym (H);
|
3057 |
|
|
end if;
|
3058 |
|
|
end loop;
|
3059 |
|
|
|
3060 |
|
|
return False;
|
3061 |
|
|
end In_Chain;
|
3062 |
|
|
|
3063 |
|
|
---------------------
|
3064 |
|
|
-- Install_Context --
|
3065 |
|
|
---------------------
|
3066 |
|
|
|
3067 |
|
|
procedure Install_Context (N : Node_Id) is
|
3068 |
|
|
Lib_Unit : constant Node_Id := Unit (N);
|
3069 |
|
|
|
3070 |
|
|
begin
|
3071 |
|
|
Install_Context_Clauses (N);
|
3072 |
|
|
|
3073 |
|
|
if Is_Child_Spec (Lib_Unit) then
|
3074 |
|
|
Install_Parents (Lib_Unit, Private_Present (Parent (Lib_Unit)));
|
3075 |
|
|
end if;
|
3076 |
|
|
|
3077 |
|
|
Install_Limited_Context_Clauses (N);
|
3078 |
|
|
end Install_Context;
|
3079 |
|
|
|
3080 |
|
|
-----------------------------
|
3081 |
|
|
-- Install_Context_Clauses --
|
3082 |
|
|
-----------------------------
|
3083 |
|
|
|
3084 |
|
|
procedure Install_Context_Clauses (N : Node_Id) is
|
3085 |
|
|
Lib_Unit : constant Node_Id := Unit (N);
|
3086 |
|
|
Item : Node_Id;
|
3087 |
|
|
Uname_Node : Entity_Id;
|
3088 |
|
|
Check_Private : Boolean := False;
|
3089 |
|
|
Decl_Node : Node_Id;
|
3090 |
|
|
Lib_Parent : Entity_Id;
|
3091 |
|
|
|
3092 |
|
|
begin
|
3093 |
|
|
-- First skip configuration pragmas at the start of the context. They
|
3094 |
|
|
-- are not technically part of the context clause, but that's where the
|
3095 |
|
|
-- parser puts them. Note they were analyzed in Analyze_Context.
|
3096 |
|
|
|
3097 |
|
|
Item := First (Context_Items (N));
|
3098 |
|
|
while Present (Item)
|
3099 |
|
|
and then Nkind (Item) = N_Pragma
|
3100 |
|
|
and then Pragma_Name (Item) in Configuration_Pragma_Names
|
3101 |
|
|
loop
|
3102 |
|
|
Next (Item);
|
3103 |
|
|
end loop;
|
3104 |
|
|
|
3105 |
|
|
-- Loop through the actual context clause items. We process everything
|
3106 |
|
|
-- except Limited_With clauses in this routine. Limited_With clauses
|
3107 |
|
|
-- are separately installed (see Install_Limited_Context_Clauses).
|
3108 |
|
|
|
3109 |
|
|
while Present (Item) loop
|
3110 |
|
|
|
3111 |
|
|
-- Case of explicit WITH clause
|
3112 |
|
|
|
3113 |
|
|
if Nkind (Item) = N_With_Clause
|
3114 |
|
|
and then not Implicit_With (Item)
|
3115 |
|
|
then
|
3116 |
|
|
if Limited_Present (Item) then
|
3117 |
|
|
|
3118 |
|
|
-- Limited withed units will be installed later
|
3119 |
|
|
|
3120 |
|
|
goto Continue;
|
3121 |
|
|
|
3122 |
|
|
-- If Name (Item) is not an entity name, something is wrong, and
|
3123 |
|
|
-- this will be detected in due course, for now ignore the item
|
3124 |
|
|
|
3125 |
|
|
elsif not Is_Entity_Name (Name (Item)) then
|
3126 |
|
|
goto Continue;
|
3127 |
|
|
|
3128 |
|
|
elsif No (Entity (Name (Item))) then
|
3129 |
|
|
Set_Entity (Name (Item), Any_Id);
|
3130 |
|
|
goto Continue;
|
3131 |
|
|
end if;
|
3132 |
|
|
|
3133 |
|
|
Uname_Node := Entity (Name (Item));
|
3134 |
|
|
|
3135 |
|
|
if Is_Private_Descendant (Uname_Node) then
|
3136 |
|
|
Check_Private := True;
|
3137 |
|
|
end if;
|
3138 |
|
|
|
3139 |
|
|
Install_Withed_Unit (Item);
|
3140 |
|
|
|
3141 |
|
|
Decl_Node := Unit_Declaration_Node (Uname_Node);
|
3142 |
|
|
|
3143 |
|
|
-- If the unit is a subprogram instance, it appears nested within
|
3144 |
|
|
-- a package that carries the parent information.
|
3145 |
|
|
|
3146 |
|
|
if Is_Generic_Instance (Uname_Node)
|
3147 |
|
|
and then Ekind (Uname_Node) /= E_Package
|
3148 |
|
|
then
|
3149 |
|
|
Decl_Node := Parent (Parent (Decl_Node));
|
3150 |
|
|
end if;
|
3151 |
|
|
|
3152 |
|
|
if Is_Child_Spec (Decl_Node) then
|
3153 |
|
|
if Nkind (Name (Item)) = N_Expanded_Name then
|
3154 |
|
|
Expand_With_Clause (Item, Prefix (Name (Item)), N);
|
3155 |
|
|
else
|
3156 |
|
|
-- If not an expanded name, the child unit must be a
|
3157 |
|
|
-- renaming, nothing to do.
|
3158 |
|
|
|
3159 |
|
|
null;
|
3160 |
|
|
end if;
|
3161 |
|
|
|
3162 |
|
|
elsif Nkind (Decl_Node) = N_Subprogram_Body
|
3163 |
|
|
and then not Acts_As_Spec (Parent (Decl_Node))
|
3164 |
|
|
and then Is_Child_Spec (Unit (Library_Unit (Parent (Decl_Node))))
|
3165 |
|
|
then
|
3166 |
|
|
Implicit_With_On_Parent
|
3167 |
|
|
(Unit (Library_Unit (Parent (Decl_Node))), N);
|
3168 |
|
|
end if;
|
3169 |
|
|
|
3170 |
|
|
-- Check license conditions unless this is a dummy unit
|
3171 |
|
|
|
3172 |
|
|
if Sloc (Library_Unit (Item)) /= No_Location then
|
3173 |
|
|
License_Check : declare
|
3174 |
|
|
Withu : constant Unit_Number_Type :=
|
3175 |
|
|
Get_Source_Unit (Library_Unit (Item));
|
3176 |
|
|
Withl : constant License_Type :=
|
3177 |
|
|
License (Source_Index (Withu));
|
3178 |
|
|
Unitl : constant License_Type :=
|
3179 |
|
|
License (Source_Index (Current_Sem_Unit));
|
3180 |
|
|
|
3181 |
|
|
procedure License_Error;
|
3182 |
|
|
-- Signal error of bad license
|
3183 |
|
|
|
3184 |
|
|
-------------------
|
3185 |
|
|
-- License_Error --
|
3186 |
|
|
-------------------
|
3187 |
|
|
|
3188 |
|
|
procedure License_Error is
|
3189 |
|
|
begin
|
3190 |
|
|
Error_Msg_N
|
3191 |
|
|
("?license of with'ed unit & may be inconsistent",
|
3192 |
|
|
Name (Item));
|
3193 |
|
|
end License_Error;
|
3194 |
|
|
|
3195 |
|
|
-- Start of processing for License_Check
|
3196 |
|
|
|
3197 |
|
|
begin
|
3198 |
|
|
-- Exclude license check if withed unit is an internal unit.
|
3199 |
|
|
-- This situation arises e.g. with the GPL version of GNAT.
|
3200 |
|
|
|
3201 |
|
|
if Is_Internal_File_Name (Unit_File_Name (Withu)) then
|
3202 |
|
|
null;
|
3203 |
|
|
|
3204 |
|
|
-- Otherwise check various cases
|
3205 |
|
|
else
|
3206 |
|
|
case Unitl is
|
3207 |
|
|
when Unknown =>
|
3208 |
|
|
null;
|
3209 |
|
|
|
3210 |
|
|
when Restricted =>
|
3211 |
|
|
if Withl = GPL then
|
3212 |
|
|
License_Error;
|
3213 |
|
|
end if;
|
3214 |
|
|
|
3215 |
|
|
when GPL =>
|
3216 |
|
|
if Withl = Restricted then
|
3217 |
|
|
License_Error;
|
3218 |
|
|
end if;
|
3219 |
|
|
|
3220 |
|
|
when Modified_GPL =>
|
3221 |
|
|
if Withl = Restricted or else Withl = GPL then
|
3222 |
|
|
License_Error;
|
3223 |
|
|
end if;
|
3224 |
|
|
|
3225 |
|
|
when Unrestricted =>
|
3226 |
|
|
null;
|
3227 |
|
|
end case;
|
3228 |
|
|
end if;
|
3229 |
|
|
end License_Check;
|
3230 |
|
|
end if;
|
3231 |
|
|
|
3232 |
|
|
-- Case of USE PACKAGE clause
|
3233 |
|
|
|
3234 |
|
|
elsif Nkind (Item) = N_Use_Package_Clause then
|
3235 |
|
|
Analyze_Use_Package (Item);
|
3236 |
|
|
|
3237 |
|
|
-- Case of USE TYPE clause
|
3238 |
|
|
|
3239 |
|
|
elsif Nkind (Item) = N_Use_Type_Clause then
|
3240 |
|
|
Analyze_Use_Type (Item);
|
3241 |
|
|
|
3242 |
|
|
-- case of PRAGMA
|
3243 |
|
|
|
3244 |
|
|
elsif Nkind (Item) = N_Pragma then
|
3245 |
|
|
Analyze (Item);
|
3246 |
|
|
end if;
|
3247 |
|
|
|
3248 |
|
|
<<Continue>>
|
3249 |
|
|
Next (Item);
|
3250 |
|
|
end loop;
|
3251 |
|
|
|
3252 |
|
|
if Is_Child_Spec (Lib_Unit) then
|
3253 |
|
|
|
3254 |
|
|
-- The unit also has implicit with_clauses on its own parents
|
3255 |
|
|
|
3256 |
|
|
if No (Context_Items (N)) then
|
3257 |
|
|
Set_Context_Items (N, New_List);
|
3258 |
|
|
end if;
|
3259 |
|
|
|
3260 |
|
|
Implicit_With_On_Parent (Lib_Unit, N);
|
3261 |
|
|
end if;
|
3262 |
|
|
|
3263 |
|
|
-- If the unit is a body, the context of the specification must also
|
3264 |
|
|
-- be installed. That includes private with_clauses in that context.
|
3265 |
|
|
|
3266 |
|
|
if Nkind (Lib_Unit) = N_Package_Body
|
3267 |
|
|
or else (Nkind (Lib_Unit) = N_Subprogram_Body
|
3268 |
|
|
and then not Acts_As_Spec (N))
|
3269 |
|
|
then
|
3270 |
|
|
Install_Context (Library_Unit (N));
|
3271 |
|
|
|
3272 |
|
|
-- Only install private with-clauses of a spec that comes from
|
3273 |
|
|
-- source, excluding specs created for a subprogram body that is
|
3274 |
|
|
-- a child unit.
|
3275 |
|
|
|
3276 |
|
|
if Comes_From_Source (Library_Unit (N)) then
|
3277 |
|
|
Install_Private_With_Clauses
|
3278 |
|
|
(Defining_Entity (Unit (Library_Unit (N))));
|
3279 |
|
|
end if;
|
3280 |
|
|
|
3281 |
|
|
if Is_Child_Spec (Unit (Library_Unit (N))) then
|
3282 |
|
|
|
3283 |
|
|
-- If the unit is the body of a public child unit, the private
|
3284 |
|
|
-- declarations of the parent must be made visible. If the child
|
3285 |
|
|
-- unit is private, the private declarations have been installed
|
3286 |
|
|
-- already in the call to Install_Parents for the spec. Installing
|
3287 |
|
|
-- private declarations must be done for all ancestors of public
|
3288 |
|
|
-- child units. In addition, sibling units mentioned in the
|
3289 |
|
|
-- context clause of the body are directly visible.
|
3290 |
|
|
|
3291 |
|
|
declare
|
3292 |
|
|
Lib_Spec : Node_Id;
|
3293 |
|
|
P : Node_Id;
|
3294 |
|
|
P_Name : Entity_Id;
|
3295 |
|
|
|
3296 |
|
|
begin
|
3297 |
|
|
Lib_Spec := Unit (Library_Unit (N));
|
3298 |
|
|
while Is_Child_Spec (Lib_Spec) loop
|
3299 |
|
|
P := Unit (Parent_Spec (Lib_Spec));
|
3300 |
|
|
P_Name := Defining_Entity (P);
|
3301 |
|
|
|
3302 |
|
|
if not (Private_Present (Parent (Lib_Spec)))
|
3303 |
|
|
and then not In_Private_Part (P_Name)
|
3304 |
|
|
then
|
3305 |
|
|
Install_Private_Declarations (P_Name);
|
3306 |
|
|
Install_Private_With_Clauses (P_Name);
|
3307 |
|
|
Set_Use (Private_Declarations (Specification (P)));
|
3308 |
|
|
end if;
|
3309 |
|
|
|
3310 |
|
|
Lib_Spec := P;
|
3311 |
|
|
end loop;
|
3312 |
|
|
end;
|
3313 |
|
|
end if;
|
3314 |
|
|
|
3315 |
|
|
-- For a package body, children in context are immediately visible
|
3316 |
|
|
|
3317 |
|
|
Install_Siblings (Defining_Entity (Unit (Library_Unit (N))), N);
|
3318 |
|
|
end if;
|
3319 |
|
|
|
3320 |
|
|
if Nkind_In (Lib_Unit, N_Generic_Package_Declaration,
|
3321 |
|
|
N_Generic_Subprogram_Declaration,
|
3322 |
|
|
N_Package_Declaration,
|
3323 |
|
|
N_Subprogram_Declaration)
|
3324 |
|
|
then
|
3325 |
|
|
if Is_Child_Spec (Lib_Unit) then
|
3326 |
|
|
Lib_Parent := Defining_Entity (Unit (Parent_Spec (Lib_Unit)));
|
3327 |
|
|
Set_Is_Private_Descendant
|
3328 |
|
|
(Defining_Entity (Lib_Unit),
|
3329 |
|
|
Is_Private_Descendant (Lib_Parent)
|
3330 |
|
|
or else Private_Present (Parent (Lib_Unit)));
|
3331 |
|
|
|
3332 |
|
|
else
|
3333 |
|
|
Set_Is_Private_Descendant
|
3334 |
|
|
(Defining_Entity (Lib_Unit),
|
3335 |
|
|
Private_Present (Parent (Lib_Unit)));
|
3336 |
|
|
end if;
|
3337 |
|
|
end if;
|
3338 |
|
|
|
3339 |
|
|
if Check_Private then
|
3340 |
|
|
Check_Private_Child_Unit (N);
|
3341 |
|
|
end if;
|
3342 |
|
|
end Install_Context_Clauses;
|
3343 |
|
|
|
3344 |
|
|
-------------------------------------
|
3345 |
|
|
-- Install_Limited_Context_Clauses --
|
3346 |
|
|
-------------------------------------
|
3347 |
|
|
|
3348 |
|
|
procedure Install_Limited_Context_Clauses (N : Node_Id) is
|
3349 |
|
|
Item : Node_Id;
|
3350 |
|
|
|
3351 |
|
|
procedure Check_Renamings (P : Node_Id; W : Node_Id);
|
3352 |
|
|
-- Check that the unlimited view of a given compilation_unit is not
|
3353 |
|
|
-- already visible through "use + renamings".
|
3354 |
|
|
|
3355 |
|
|
procedure Check_Private_Limited_Withed_Unit (Item : Node_Id);
|
3356 |
|
|
-- Check that if a limited_with clause of a given compilation_unit
|
3357 |
|
|
-- mentions a descendant of a private child of some library unit, then
|
3358 |
|
|
-- the given compilation_unit shall be the declaration of a private
|
3359 |
|
|
-- descendant of that library unit, or a public descendant of such. The
|
3360 |
|
|
-- code is analogous to that of Check_Private_Child_Unit but we cannot
|
3361 |
|
|
-- use entities on the limited with_clauses because their units have not
|
3362 |
|
|
-- been analyzed, so we have to climb the tree of ancestors looking for
|
3363 |
|
|
-- private keywords.
|
3364 |
|
|
|
3365 |
|
|
procedure Expand_Limited_With_Clause
|
3366 |
|
|
(Comp_Unit : Node_Id;
|
3367 |
|
|
Nam : Node_Id;
|
3368 |
|
|
N : Node_Id);
|
3369 |
|
|
-- If a child unit appears in a limited_with clause, there are implicit
|
3370 |
|
|
-- limited_with clauses on all parents that are not already visible
|
3371 |
|
|
-- through a regular with clause. This procedure creates the implicit
|
3372 |
|
|
-- limited with_clauses for the parents and loads the corresponding
|
3373 |
|
|
-- units. The shadow entities are created when the inserted clause is
|
3374 |
|
|
-- analyzed. Implements Ada 2005 (AI-50217).
|
3375 |
|
|
|
3376 |
|
|
---------------------
|
3377 |
|
|
-- Check_Renamings --
|
3378 |
|
|
---------------------
|
3379 |
|
|
|
3380 |
|
|
procedure Check_Renamings (P : Node_Id; W : Node_Id) is
|
3381 |
|
|
Item : Node_Id;
|
3382 |
|
|
Spec : Node_Id;
|
3383 |
|
|
WEnt : Entity_Id;
|
3384 |
|
|
Nam : Node_Id;
|
3385 |
|
|
E : Entity_Id;
|
3386 |
|
|
E2 : Entity_Id;
|
3387 |
|
|
|
3388 |
|
|
begin
|
3389 |
|
|
pragma Assert (Nkind (W) = N_With_Clause);
|
3390 |
|
|
|
3391 |
|
|
-- Protect the frontend against previous critical errors
|
3392 |
|
|
|
3393 |
|
|
case Nkind (Unit (Library_Unit (W))) is
|
3394 |
|
|
when N_Subprogram_Declaration |
|
3395 |
|
|
N_Package_Declaration |
|
3396 |
|
|
N_Generic_Subprogram_Declaration |
|
3397 |
|
|
N_Generic_Package_Declaration =>
|
3398 |
|
|
null;
|
3399 |
|
|
|
3400 |
|
|
when others =>
|
3401 |
|
|
return;
|
3402 |
|
|
end case;
|
3403 |
|
|
|
3404 |
|
|
-- Check "use + renamings"
|
3405 |
|
|
|
3406 |
|
|
WEnt := Defining_Unit_Name (Specification (Unit (Library_Unit (W))));
|
3407 |
|
|
Spec := Specification (Unit (P));
|
3408 |
|
|
|
3409 |
|
|
Item := First (Visible_Declarations (Spec));
|
3410 |
|
|
while Present (Item) loop
|
3411 |
|
|
|
3412 |
|
|
-- Look only at use package clauses
|
3413 |
|
|
|
3414 |
|
|
if Nkind (Item) = N_Use_Package_Clause then
|
3415 |
|
|
|
3416 |
|
|
-- Traverse the list of packages
|
3417 |
|
|
|
3418 |
|
|
Nam := First (Names (Item));
|
3419 |
|
|
while Present (Nam) loop
|
3420 |
|
|
E := Entity (Nam);
|
3421 |
|
|
|
3422 |
|
|
pragma Assert (Present (Parent (E)));
|
3423 |
|
|
|
3424 |
|
|
if Nkind (Parent (E)) = N_Package_Renaming_Declaration
|
3425 |
|
|
and then Renamed_Entity (E) = WEnt
|
3426 |
|
|
then
|
3427 |
|
|
-- The unlimited view is visible through use clause and
|
3428 |
|
|
-- renamings. There is no need to generate the error
|
3429 |
|
|
-- message here because Is_Visible_Through_Renamings
|
3430 |
|
|
-- takes care of generating the precise error message.
|
3431 |
|
|
|
3432 |
|
|
return;
|
3433 |
|
|
|
3434 |
|
|
elsif Nkind (Parent (E)) = N_Package_Specification then
|
3435 |
|
|
|
3436 |
|
|
-- The use clause may refer to a local package.
|
3437 |
|
|
-- Check all the enclosing scopes.
|
3438 |
|
|
|
3439 |
|
|
E2 := E;
|
3440 |
|
|
while E2 /= Standard_Standard
|
3441 |
|
|
and then E2 /= WEnt
|
3442 |
|
|
loop
|
3443 |
|
|
E2 := Scope (E2);
|
3444 |
|
|
end loop;
|
3445 |
|
|
|
3446 |
|
|
if E2 = WEnt then
|
3447 |
|
|
Error_Msg_N
|
3448 |
|
|
("unlimited view visible through use clause ", W);
|
3449 |
|
|
return;
|
3450 |
|
|
end if;
|
3451 |
|
|
end if;
|
3452 |
|
|
|
3453 |
|
|
Next (Nam);
|
3454 |
|
|
end loop;
|
3455 |
|
|
end if;
|
3456 |
|
|
|
3457 |
|
|
Next (Item);
|
3458 |
|
|
end loop;
|
3459 |
|
|
|
3460 |
|
|
-- Recursive call to check all the ancestors
|
3461 |
|
|
|
3462 |
|
|
if Is_Child_Spec (Unit (P)) then
|
3463 |
|
|
Check_Renamings (P => Parent_Spec (Unit (P)), W => W);
|
3464 |
|
|
end if;
|
3465 |
|
|
end Check_Renamings;
|
3466 |
|
|
|
3467 |
|
|
---------------------------------------
|
3468 |
|
|
-- Check_Private_Limited_Withed_Unit --
|
3469 |
|
|
---------------------------------------
|
3470 |
|
|
|
3471 |
|
|
procedure Check_Private_Limited_Withed_Unit (Item : Node_Id) is
|
3472 |
|
|
Curr_Parent : Node_Id;
|
3473 |
|
|
Child_Parent : Node_Id;
|
3474 |
|
|
Curr_Private : Boolean;
|
3475 |
|
|
|
3476 |
|
|
begin
|
3477 |
|
|
-- Compilation unit of the parent of the withed library unit
|
3478 |
|
|
|
3479 |
|
|
Child_Parent := Library_Unit (Item);
|
3480 |
|
|
|
3481 |
|
|
-- If the child unit is a public child, then locate its nearest
|
3482 |
|
|
-- private ancestor, if any, then Child_Parent will then be set to
|
3483 |
|
|
-- the parent of that ancestor.
|
3484 |
|
|
|
3485 |
|
|
if not Private_Present (Library_Unit (Item)) then
|
3486 |
|
|
while Present (Child_Parent)
|
3487 |
|
|
and then not Private_Present (Child_Parent)
|
3488 |
|
|
loop
|
3489 |
|
|
Child_Parent := Parent_Spec (Unit (Child_Parent));
|
3490 |
|
|
end loop;
|
3491 |
|
|
|
3492 |
|
|
if No (Child_Parent) then
|
3493 |
|
|
return;
|
3494 |
|
|
end if;
|
3495 |
|
|
end if;
|
3496 |
|
|
|
3497 |
|
|
Child_Parent := Parent_Spec (Unit (Child_Parent));
|
3498 |
|
|
|
3499 |
|
|
-- Traverse all the ancestors of the current compilation unit to
|
3500 |
|
|
-- check if it is a descendant of named library unit.
|
3501 |
|
|
|
3502 |
|
|
Curr_Parent := Parent (Item);
|
3503 |
|
|
Curr_Private := Private_Present (Curr_Parent);
|
3504 |
|
|
|
3505 |
|
|
while Present (Parent_Spec (Unit (Curr_Parent)))
|
3506 |
|
|
and then Curr_Parent /= Child_Parent
|
3507 |
|
|
loop
|
3508 |
|
|
Curr_Parent := Parent_Spec (Unit (Curr_Parent));
|
3509 |
|
|
Curr_Private := Curr_Private or else Private_Present (Curr_Parent);
|
3510 |
|
|
end loop;
|
3511 |
|
|
|
3512 |
|
|
if Curr_Parent /= Child_Parent then
|
3513 |
|
|
Error_Msg_N
|
3514 |
|
|
("unit in with clause is private child unit!", Item);
|
3515 |
|
|
Error_Msg_NE
|
3516 |
|
|
("\current unit must also have parent&!",
|
3517 |
|
|
Item, Defining_Unit_Name (Specification (Unit (Child_Parent))));
|
3518 |
|
|
|
3519 |
|
|
elsif Private_Present (Parent (Item))
|
3520 |
|
|
or else Curr_Private
|
3521 |
|
|
or else Private_Present (Item)
|
3522 |
|
|
or else Nkind_In (Unit (Parent (Item)), N_Package_Body,
|
3523 |
|
|
N_Subprogram_Body,
|
3524 |
|
|
N_Subunit)
|
3525 |
|
|
then
|
3526 |
|
|
-- Current unit is private, of descendant of a private unit
|
3527 |
|
|
|
3528 |
|
|
null;
|
3529 |
|
|
|
3530 |
|
|
else
|
3531 |
|
|
Error_Msg_NE
|
3532 |
|
|
("current unit must also be private descendant of&",
|
3533 |
|
|
Item, Defining_Unit_Name (Specification (Unit (Child_Parent))));
|
3534 |
|
|
end if;
|
3535 |
|
|
end Check_Private_Limited_Withed_Unit;
|
3536 |
|
|
|
3537 |
|
|
--------------------------------
|
3538 |
|
|
-- Expand_Limited_With_Clause --
|
3539 |
|
|
--------------------------------
|
3540 |
|
|
|
3541 |
|
|
procedure Expand_Limited_With_Clause
|
3542 |
|
|
(Comp_Unit : Node_Id;
|
3543 |
|
|
Nam : Node_Id;
|
3544 |
|
|
N : Node_Id)
|
3545 |
|
|
is
|
3546 |
|
|
Loc : constant Source_Ptr := Sloc (Nam);
|
3547 |
|
|
Unum : Unit_Number_Type;
|
3548 |
|
|
Withn : Node_Id;
|
3549 |
|
|
|
3550 |
|
|
function Previous_Withed_Unit (W : Node_Id) return Boolean;
|
3551 |
|
|
-- Returns true if the context already includes a with_clause for
|
3552 |
|
|
-- this unit. If the with_clause is non-limited, the unit is fully
|
3553 |
|
|
-- visible and an implicit limited_with should not be created. If
|
3554 |
|
|
-- there is already a limited_with clause for W, a second one is
|
3555 |
|
|
-- simply redundant.
|
3556 |
|
|
|
3557 |
|
|
--------------------------
|
3558 |
|
|
-- Previous_Withed_Unit --
|
3559 |
|
|
--------------------------
|
3560 |
|
|
|
3561 |
|
|
function Previous_Withed_Unit (W : Node_Id) return Boolean is
|
3562 |
|
|
Item : Node_Id;
|
3563 |
|
|
|
3564 |
|
|
begin
|
3565 |
|
|
-- A limited with_clause cannot appear in the same context_clause
|
3566 |
|
|
-- as a nonlimited with_clause which mentions the same library.
|
3567 |
|
|
|
3568 |
|
|
Item := First (Context_Items (Comp_Unit));
|
3569 |
|
|
while Present (Item) loop
|
3570 |
|
|
if Nkind (Item) = N_With_Clause
|
3571 |
|
|
and then Library_Unit (Item) = Library_Unit (W)
|
3572 |
|
|
then
|
3573 |
|
|
return True;
|
3574 |
|
|
end if;
|
3575 |
|
|
|
3576 |
|
|
Next (Item);
|
3577 |
|
|
end loop;
|
3578 |
|
|
|
3579 |
|
|
return False;
|
3580 |
|
|
end Previous_Withed_Unit;
|
3581 |
|
|
|
3582 |
|
|
-- Start of processing for Expand_Limited_With_Clause
|
3583 |
|
|
|
3584 |
|
|
begin
|
3585 |
|
|
New_Nodes_OK := New_Nodes_OK + 1;
|
3586 |
|
|
|
3587 |
|
|
if Nkind (Nam) = N_Identifier then
|
3588 |
|
|
|
3589 |
|
|
-- Create node for name of withed unit
|
3590 |
|
|
|
3591 |
|
|
Withn :=
|
3592 |
|
|
Make_With_Clause (Loc,
|
3593 |
|
|
Name => New_Copy (Nam));
|
3594 |
|
|
|
3595 |
|
|
else pragma Assert (Nkind (Nam) = N_Selected_Component);
|
3596 |
|
|
Withn :=
|
3597 |
|
|
Make_With_Clause (Loc,
|
3598 |
|
|
Name => Make_Selected_Component (Loc,
|
3599 |
|
|
Prefix => New_Copy_Tree (Prefix (Nam)),
|
3600 |
|
|
Selector_Name => New_Copy (Selector_Name (Nam))));
|
3601 |
|
|
Set_Parent (Withn, Parent (N));
|
3602 |
|
|
end if;
|
3603 |
|
|
|
3604 |
|
|
Set_Limited_Present (Withn);
|
3605 |
|
|
Set_First_Name (Withn);
|
3606 |
|
|
Set_Implicit_With (Withn);
|
3607 |
|
|
|
3608 |
|
|
Unum :=
|
3609 |
|
|
Load_Unit
|
3610 |
|
|
(Load_Name => Get_Spec_Name (Get_Unit_Name (Nam)),
|
3611 |
|
|
Required => True,
|
3612 |
|
|
Subunit => False,
|
3613 |
|
|
Error_Node => Nam);
|
3614 |
|
|
|
3615 |
|
|
-- Do not generate a limited_with_clause on the current unit.
|
3616 |
|
|
-- This path is taken when a unit has a limited_with clause on
|
3617 |
|
|
-- one of its child units.
|
3618 |
|
|
|
3619 |
|
|
if Unum = Current_Sem_Unit then
|
3620 |
|
|
return;
|
3621 |
|
|
end if;
|
3622 |
|
|
|
3623 |
|
|
Set_Library_Unit (Withn, Cunit (Unum));
|
3624 |
|
|
Set_Corresponding_Spec
|
3625 |
|
|
(Withn, Specification (Unit (Cunit (Unum))));
|
3626 |
|
|
|
3627 |
|
|
if not Previous_Withed_Unit (Withn) then
|
3628 |
|
|
Prepend (Withn, Context_Items (Parent (N)));
|
3629 |
|
|
Mark_Rewrite_Insertion (Withn);
|
3630 |
|
|
|
3631 |
|
|
-- Add implicit limited_with_clauses for parents of child units
|
3632 |
|
|
-- mentioned in limited_with clauses.
|
3633 |
|
|
|
3634 |
|
|
if Nkind (Nam) = N_Selected_Component then
|
3635 |
|
|
Expand_Limited_With_Clause (Comp_Unit, Prefix (Nam), N);
|
3636 |
|
|
end if;
|
3637 |
|
|
|
3638 |
|
|
Analyze (Withn);
|
3639 |
|
|
|
3640 |
|
|
if not Limited_View_Installed (Withn) then
|
3641 |
|
|
Install_Limited_Withed_Unit (Withn);
|
3642 |
|
|
end if;
|
3643 |
|
|
end if;
|
3644 |
|
|
|
3645 |
|
|
New_Nodes_OK := New_Nodes_OK - 1;
|
3646 |
|
|
end Expand_Limited_With_Clause;
|
3647 |
|
|
|
3648 |
|
|
-- Start of processing for Install_Limited_Context_Clauses
|
3649 |
|
|
|
3650 |
|
|
begin
|
3651 |
|
|
Item := First (Context_Items (N));
|
3652 |
|
|
while Present (Item) loop
|
3653 |
|
|
if Nkind (Item) = N_With_Clause
|
3654 |
|
|
and then Limited_Present (Item)
|
3655 |
|
|
then
|
3656 |
|
|
if Nkind (Name (Item)) = N_Selected_Component then
|
3657 |
|
|
Expand_Limited_With_Clause
|
3658 |
|
|
(Comp_Unit => N, Nam => Prefix (Name (Item)), N => Item);
|
3659 |
|
|
end if;
|
3660 |
|
|
|
3661 |
|
|
Check_Private_Limited_Withed_Unit (Item);
|
3662 |
|
|
|
3663 |
|
|
if not Implicit_With (Item)
|
3664 |
|
|
and then Is_Child_Spec (Unit (N))
|
3665 |
|
|
then
|
3666 |
|
|
Check_Renamings (Parent_Spec (Unit (N)), Item);
|
3667 |
|
|
end if;
|
3668 |
|
|
|
3669 |
|
|
-- A unit may have a limited with on itself if it has a limited
|
3670 |
|
|
-- with_clause on one of its child units. In that case it is
|
3671 |
|
|
-- already being compiled and it makes no sense to install its
|
3672 |
|
|
-- limited view.
|
3673 |
|
|
|
3674 |
|
|
-- If the item is a limited_private_with_clause, install it if the
|
3675 |
|
|
-- current unit is a body or if it is a private child. Otherwise
|
3676 |
|
|
-- the private clause is installed before analyzing the private
|
3677 |
|
|
-- part of the current unit.
|
3678 |
|
|
|
3679 |
|
|
if Library_Unit (Item) /= Cunit (Current_Sem_Unit)
|
3680 |
|
|
and then not Limited_View_Installed (Item)
|
3681 |
|
|
then
|
3682 |
|
|
if not Private_Present (Item)
|
3683 |
|
|
or else Private_Present (N)
|
3684 |
|
|
or else Nkind_In (Unit (N), N_Package_Body,
|
3685 |
|
|
N_Subprogram_Body,
|
3686 |
|
|
N_Subunit)
|
3687 |
|
|
then
|
3688 |
|
|
Install_Limited_Withed_Unit (Item);
|
3689 |
|
|
end if;
|
3690 |
|
|
end if;
|
3691 |
|
|
end if;
|
3692 |
|
|
|
3693 |
|
|
Next (Item);
|
3694 |
|
|
end loop;
|
3695 |
|
|
|
3696 |
|
|
-- Ada 2005 (AI-412): Examine the visible declarations of a package
|
3697 |
|
|
-- spec, looking for incomplete subtype declarations of incomplete types
|
3698 |
|
|
-- visible through a limited with clause.
|
3699 |
|
|
|
3700 |
|
|
if Ada_Version >= Ada_05
|
3701 |
|
|
and then Analyzed (N)
|
3702 |
|
|
and then Nkind (Unit (N)) = N_Package_Declaration
|
3703 |
|
|
then
|
3704 |
|
|
declare
|
3705 |
|
|
Decl : Node_Id;
|
3706 |
|
|
Def_Id : Entity_Id;
|
3707 |
|
|
Non_Lim_View : Entity_Id;
|
3708 |
|
|
|
3709 |
|
|
begin
|
3710 |
|
|
Decl := First (Visible_Declarations (Specification (Unit (N))));
|
3711 |
|
|
while Present (Decl) loop
|
3712 |
|
|
if Nkind (Decl) = N_Subtype_Declaration
|
3713 |
|
|
and then
|
3714 |
|
|
Ekind (Defining_Identifier (Decl)) = E_Incomplete_Subtype
|
3715 |
|
|
and then
|
3716 |
|
|
From_With_Type (Defining_Identifier (Decl))
|
3717 |
|
|
then
|
3718 |
|
|
Def_Id := Defining_Identifier (Decl);
|
3719 |
|
|
Non_Lim_View := Non_Limited_View (Def_Id);
|
3720 |
|
|
|
3721 |
|
|
if not Is_Incomplete_Type (Non_Lim_View) then
|
3722 |
|
|
|
3723 |
|
|
-- Convert an incomplete subtype declaration into a
|
3724 |
|
|
-- corresponding non-limited view subtype declaration.
|
3725 |
|
|
-- This is usually the case when analyzing a body that
|
3726 |
|
|
-- has regular with-clauses, when the spec has limited
|
3727 |
|
|
-- ones.
|
3728 |
|
|
|
3729 |
|
|
-- If the non-limited view is still incomplete, it is
|
3730 |
|
|
-- the dummy entry already created, and the declaration
|
3731 |
|
|
-- cannot be reanalyzed. This is the case when installing
|
3732 |
|
|
-- a parent unit that has limited with-clauses.
|
3733 |
|
|
|
3734 |
|
|
Set_Subtype_Indication (Decl,
|
3735 |
|
|
New_Reference_To (Non_Lim_View, Sloc (Def_Id)));
|
3736 |
|
|
Set_Etype (Def_Id, Non_Lim_View);
|
3737 |
|
|
Set_Ekind (Def_Id, Subtype_Kind (Ekind (Non_Lim_View)));
|
3738 |
|
|
Set_Analyzed (Decl, False);
|
3739 |
|
|
|
3740 |
|
|
-- Reanalyze the declaration, suppressing the call to
|
3741 |
|
|
-- Enter_Name to avoid duplicate names.
|
3742 |
|
|
|
3743 |
|
|
Analyze_Subtype_Declaration
|
3744 |
|
|
(N => Decl,
|
3745 |
|
|
Skip => True);
|
3746 |
|
|
end if;
|
3747 |
|
|
end if;
|
3748 |
|
|
|
3749 |
|
|
Next (Decl);
|
3750 |
|
|
end loop;
|
3751 |
|
|
end;
|
3752 |
|
|
end if;
|
3753 |
|
|
end Install_Limited_Context_Clauses;
|
3754 |
|
|
|
3755 |
|
|
---------------------
|
3756 |
|
|
-- Install_Parents --
|
3757 |
|
|
---------------------
|
3758 |
|
|
|
3759 |
|
|
procedure Install_Parents (Lib_Unit : Node_Id; Is_Private : Boolean) is
|
3760 |
|
|
P : Node_Id;
|
3761 |
|
|
E_Name : Entity_Id;
|
3762 |
|
|
P_Name : Entity_Id;
|
3763 |
|
|
P_Spec : Node_Id;
|
3764 |
|
|
|
3765 |
|
|
begin
|
3766 |
|
|
P := Unit (Parent_Spec (Lib_Unit));
|
3767 |
|
|
P_Name := Get_Parent_Entity (P);
|
3768 |
|
|
|
3769 |
|
|
if Etype (P_Name) = Any_Type then
|
3770 |
|
|
return;
|
3771 |
|
|
end if;
|
3772 |
|
|
|
3773 |
|
|
if Ekind (P_Name) = E_Generic_Package
|
3774 |
|
|
and then not Nkind_In (Lib_Unit, N_Generic_Subprogram_Declaration,
|
3775 |
|
|
N_Generic_Package_Declaration)
|
3776 |
|
|
and then Nkind (Lib_Unit) not in N_Generic_Renaming_Declaration
|
3777 |
|
|
then
|
3778 |
|
|
Error_Msg_N
|
3779 |
|
|
("child of a generic package must be a generic unit", Lib_Unit);
|
3780 |
|
|
|
3781 |
|
|
elsif not Is_Package_Or_Generic_Package (P_Name) then
|
3782 |
|
|
Error_Msg_N
|
3783 |
|
|
("parent unit must be package or generic package", Lib_Unit);
|
3784 |
|
|
raise Unrecoverable_Error;
|
3785 |
|
|
|
3786 |
|
|
elsif Present (Renamed_Object (P_Name)) then
|
3787 |
|
|
Error_Msg_N ("parent unit cannot be a renaming", Lib_Unit);
|
3788 |
|
|
raise Unrecoverable_Error;
|
3789 |
|
|
|
3790 |
|
|
-- Verify that a child of an instance is itself an instance, or the
|
3791 |
|
|
-- renaming of one. Given that an instance that is a unit is replaced
|
3792 |
|
|
-- with a package declaration, check against the original node. The
|
3793 |
|
|
-- parent may be currently being instantiated, in which case it appears
|
3794 |
|
|
-- as a declaration, but the generic_parent is already established
|
3795 |
|
|
-- indicating that we deal with an instance.
|
3796 |
|
|
|
3797 |
|
|
elsif Nkind (Original_Node (P)) = N_Package_Instantiation then
|
3798 |
|
|
if Nkind (Lib_Unit) in N_Renaming_Declaration
|
3799 |
|
|
or else Nkind (Original_Node (Lib_Unit)) in N_Generic_Instantiation
|
3800 |
|
|
or else
|
3801 |
|
|
(Nkind (Lib_Unit) = N_Package_Declaration
|
3802 |
|
|
and then Present (Generic_Parent (Specification (Lib_Unit))))
|
3803 |
|
|
then
|
3804 |
|
|
null;
|
3805 |
|
|
else
|
3806 |
|
|
Error_Msg_N
|
3807 |
|
|
("child of an instance must be an instance or renaming",
|
3808 |
|
|
Lib_Unit);
|
3809 |
|
|
end if;
|
3810 |
|
|
end if;
|
3811 |
|
|
|
3812 |
|
|
-- This is the recursive call that ensures all parents are loaded
|
3813 |
|
|
|
3814 |
|
|
if Is_Child_Spec (P) then
|
3815 |
|
|
Install_Parents (P,
|
3816 |
|
|
Is_Private or else Private_Present (Parent (Lib_Unit)));
|
3817 |
|
|
end if;
|
3818 |
|
|
|
3819 |
|
|
-- Now we can install the context for this parent
|
3820 |
|
|
|
3821 |
|
|
Install_Context_Clauses (Parent_Spec (Lib_Unit));
|
3822 |
|
|
Install_Limited_Context_Clauses (Parent_Spec (Lib_Unit));
|
3823 |
|
|
Install_Siblings (P_Name, Parent (Lib_Unit));
|
3824 |
|
|
|
3825 |
|
|
-- The child unit is in the declarative region of the parent. The parent
|
3826 |
|
|
-- must therefore appear in the scope stack and be visible, as when
|
3827 |
|
|
-- compiling the corresponding body. If the child unit is private or it
|
3828 |
|
|
-- is a package body, private declarations must be accessible as well.
|
3829 |
|
|
-- Use declarations in the parent must also be installed. Finally, other
|
3830 |
|
|
-- child units of the same parent that are in the context are
|
3831 |
|
|
-- immediately visible.
|
3832 |
|
|
|
3833 |
|
|
-- Find entity for compilation unit, and set its private descendant
|
3834 |
|
|
-- status as needed. Indicate that it is a compilation unit, which is
|
3835 |
|
|
-- redundant in general, but needed if this is a generated child spec
|
3836 |
|
|
-- for a child body without previous spec.
|
3837 |
|
|
|
3838 |
|
|
E_Name := Defining_Entity (Lib_Unit);
|
3839 |
|
|
|
3840 |
|
|
Set_Is_Child_Unit (E_Name);
|
3841 |
|
|
Set_Is_Compilation_Unit (E_Name);
|
3842 |
|
|
|
3843 |
|
|
Set_Is_Private_Descendant (E_Name,
|
3844 |
|
|
Is_Private_Descendant (P_Name)
|
3845 |
|
|
or else Private_Present (Parent (Lib_Unit)));
|
3846 |
|
|
|
3847 |
|
|
P_Spec := Specification (Unit_Declaration_Node (P_Name));
|
3848 |
|
|
Push_Scope (P_Name);
|
3849 |
|
|
|
3850 |
|
|
-- Save current visibility of unit
|
3851 |
|
|
|
3852 |
|
|
Scope_Stack.Table (Scope_Stack.Last).Previous_Visibility :=
|
3853 |
|
|
Is_Immediately_Visible (P_Name);
|
3854 |
|
|
Set_Is_Immediately_Visible (P_Name);
|
3855 |
|
|
Install_Visible_Declarations (P_Name);
|
3856 |
|
|
Set_Use (Visible_Declarations (P_Spec));
|
3857 |
|
|
|
3858 |
|
|
-- If the parent is a generic unit, its formal part may contain formal
|
3859 |
|
|
-- packages and use clauses for them.
|
3860 |
|
|
|
3861 |
|
|
if Ekind (P_Name) = E_Generic_Package then
|
3862 |
|
|
Set_Use (Generic_Formal_Declarations (Parent (P_Spec)));
|
3863 |
|
|
end if;
|
3864 |
|
|
|
3865 |
|
|
if Is_Private
|
3866 |
|
|
or else Private_Present (Parent (Lib_Unit))
|
3867 |
|
|
then
|
3868 |
|
|
Install_Private_Declarations (P_Name);
|
3869 |
|
|
Install_Private_With_Clauses (P_Name);
|
3870 |
|
|
Set_Use (Private_Declarations (P_Spec));
|
3871 |
|
|
end if;
|
3872 |
|
|
end Install_Parents;
|
3873 |
|
|
|
3874 |
|
|
----------------------------------
|
3875 |
|
|
-- Install_Private_With_Clauses --
|
3876 |
|
|
----------------------------------
|
3877 |
|
|
|
3878 |
|
|
procedure Install_Private_With_Clauses (P : Entity_Id) is
|
3879 |
|
|
Decl : constant Node_Id := Unit_Declaration_Node (P);
|
3880 |
|
|
Item : Node_Id;
|
3881 |
|
|
|
3882 |
|
|
begin
|
3883 |
|
|
if Debug_Flag_I then
|
3884 |
|
|
Write_Str ("install private with clauses of ");
|
3885 |
|
|
Write_Name (Chars (P));
|
3886 |
|
|
Write_Eol;
|
3887 |
|
|
end if;
|
3888 |
|
|
|
3889 |
|
|
if Nkind (Parent (Decl)) = N_Compilation_Unit then
|
3890 |
|
|
Item := First (Context_Items (Parent (Decl)));
|
3891 |
|
|
while Present (Item) loop
|
3892 |
|
|
if Nkind (Item) = N_With_Clause
|
3893 |
|
|
and then Private_Present (Item)
|
3894 |
|
|
then
|
3895 |
|
|
if Limited_Present (Item) then
|
3896 |
|
|
if not Limited_View_Installed (Item) then
|
3897 |
|
|
Install_Limited_Withed_Unit (Item);
|
3898 |
|
|
end if;
|
3899 |
|
|
else
|
3900 |
|
|
Install_Withed_Unit (Item, Private_With_OK => True);
|
3901 |
|
|
end if;
|
3902 |
|
|
end if;
|
3903 |
|
|
|
3904 |
|
|
Next (Item);
|
3905 |
|
|
end loop;
|
3906 |
|
|
end if;
|
3907 |
|
|
end Install_Private_With_Clauses;
|
3908 |
|
|
|
3909 |
|
|
----------------------
|
3910 |
|
|
-- Install_Siblings --
|
3911 |
|
|
----------------------
|
3912 |
|
|
|
3913 |
|
|
procedure Install_Siblings (U_Name : Entity_Id; N : Node_Id) is
|
3914 |
|
|
Item : Node_Id;
|
3915 |
|
|
Id : Entity_Id;
|
3916 |
|
|
Prev : Entity_Id;
|
3917 |
|
|
|
3918 |
|
|
begin
|
3919 |
|
|
-- Iterate over explicit with clauses, and check whether the scope of
|
3920 |
|
|
-- each entity is an ancestor of the current unit, in which case it is
|
3921 |
|
|
-- immediately visible.
|
3922 |
|
|
|
3923 |
|
|
Item := First (Context_Items (N));
|
3924 |
|
|
while Present (Item) loop
|
3925 |
|
|
|
3926 |
|
|
-- Do not install private_with_clauses declaration, unless unit
|
3927 |
|
|
-- is itself a private child unit, or is a body. Note that for a
|
3928 |
|
|
-- subprogram body the private_with_clause does not take effect until
|
3929 |
|
|
-- after the specification.
|
3930 |
|
|
|
3931 |
|
|
if Nkind (Item) /= N_With_Clause
|
3932 |
|
|
or else Implicit_With (Item)
|
3933 |
|
|
or else Limited_Present (Item)
|
3934 |
|
|
then
|
3935 |
|
|
null;
|
3936 |
|
|
|
3937 |
|
|
elsif not Private_Present (Item)
|
3938 |
|
|
or else Private_Present (N)
|
3939 |
|
|
or else Nkind (Unit (N)) = N_Package_Body
|
3940 |
|
|
then
|
3941 |
|
|
Id := Entity (Name (Item));
|
3942 |
|
|
|
3943 |
|
|
if Is_Child_Unit (Id)
|
3944 |
|
|
and then Is_Ancestor_Package (Scope (Id), U_Name)
|
3945 |
|
|
then
|
3946 |
|
|
Set_Is_Immediately_Visible (Id);
|
3947 |
|
|
|
3948 |
|
|
-- Check for the presence of another unit in the context that
|
3949 |
|
|
-- may be inadvertently hidden by the child.
|
3950 |
|
|
|
3951 |
|
|
Prev := Current_Entity (Id);
|
3952 |
|
|
|
3953 |
|
|
if Present (Prev)
|
3954 |
|
|
and then Is_Immediately_Visible (Prev)
|
3955 |
|
|
and then not Is_Child_Unit (Prev)
|
3956 |
|
|
then
|
3957 |
|
|
declare
|
3958 |
|
|
Clause : Node_Id;
|
3959 |
|
|
|
3960 |
|
|
begin
|
3961 |
|
|
Clause := First (Context_Items (N));
|
3962 |
|
|
while Present (Clause) loop
|
3963 |
|
|
if Nkind (Clause) = N_With_Clause
|
3964 |
|
|
and then Entity (Name (Clause)) = Prev
|
3965 |
|
|
then
|
3966 |
|
|
Error_Msg_NE
|
3967 |
|
|
("child unit& hides compilation unit " &
|
3968 |
|
|
"with the same name?",
|
3969 |
|
|
Name (Item), Id);
|
3970 |
|
|
exit;
|
3971 |
|
|
end if;
|
3972 |
|
|
|
3973 |
|
|
Next (Clause);
|
3974 |
|
|
end loop;
|
3975 |
|
|
end;
|
3976 |
|
|
end if;
|
3977 |
|
|
|
3978 |
|
|
-- The With_Clause may be on a grand-child or one of its further
|
3979 |
|
|
-- descendants, which makes a child immediately visible. Examine
|
3980 |
|
|
-- ancestry to determine whether such a child exists. For example,
|
3981 |
|
|
-- if current unit is A.C, and with_clause is on A.X.Y.Z, then X
|
3982 |
|
|
-- is immediately visible.
|
3983 |
|
|
|
3984 |
|
|
elsif Is_Child_Unit (Id) then
|
3985 |
|
|
declare
|
3986 |
|
|
Par : Entity_Id;
|
3987 |
|
|
|
3988 |
|
|
begin
|
3989 |
|
|
Par := Scope (Id);
|
3990 |
|
|
while Is_Child_Unit (Par) loop
|
3991 |
|
|
if Is_Ancestor_Package (Scope (Par), U_Name) then
|
3992 |
|
|
Set_Is_Immediately_Visible (Par);
|
3993 |
|
|
exit;
|
3994 |
|
|
end if;
|
3995 |
|
|
|
3996 |
|
|
Par := Scope (Par);
|
3997 |
|
|
end loop;
|
3998 |
|
|
end;
|
3999 |
|
|
end if;
|
4000 |
|
|
|
4001 |
|
|
-- If the item is a private with-clause on a child unit, the parent
|
4002 |
|
|
-- may have been installed already, but the child unit must remain
|
4003 |
|
|
-- invisible until installed in a private part or body, unless there
|
4004 |
|
|
-- is already a regular with_clause for it in the current unit.
|
4005 |
|
|
|
4006 |
|
|
elsif Private_Present (Item) then
|
4007 |
|
|
Id := Entity (Name (Item));
|
4008 |
|
|
|
4009 |
|
|
if Is_Child_Unit (Id) then
|
4010 |
|
|
declare
|
4011 |
|
|
Clause : Node_Id;
|
4012 |
|
|
|
4013 |
|
|
function In_Context return Boolean;
|
4014 |
|
|
-- Scan context of current unit, to check whether there is
|
4015 |
|
|
-- a with_clause on the same unit as a private with-clause
|
4016 |
|
|
-- on a parent, in which case child unit is visible.
|
4017 |
|
|
|
4018 |
|
|
----------------
|
4019 |
|
|
-- In_Context --
|
4020 |
|
|
----------------
|
4021 |
|
|
|
4022 |
|
|
function In_Context return Boolean is
|
4023 |
|
|
begin
|
4024 |
|
|
Clause :=
|
4025 |
|
|
First (Context_Items (Cunit (Current_Sem_Unit)));
|
4026 |
|
|
while Present (Clause) loop
|
4027 |
|
|
if Nkind (Clause) = N_With_Clause
|
4028 |
|
|
and then Comes_From_Source (Clause)
|
4029 |
|
|
and then Is_Entity_Name (Name (Clause))
|
4030 |
|
|
and then Entity (Name (Clause)) = Id
|
4031 |
|
|
and then not Private_Present (Clause)
|
4032 |
|
|
then
|
4033 |
|
|
return True;
|
4034 |
|
|
end if;
|
4035 |
|
|
|
4036 |
|
|
Next (Clause);
|
4037 |
|
|
end loop;
|
4038 |
|
|
|
4039 |
|
|
return False;
|
4040 |
|
|
end In_Context;
|
4041 |
|
|
|
4042 |
|
|
begin
|
4043 |
|
|
Set_Is_Visible_Child_Unit (Id, In_Context);
|
4044 |
|
|
end;
|
4045 |
|
|
end if;
|
4046 |
|
|
end if;
|
4047 |
|
|
|
4048 |
|
|
Next (Item);
|
4049 |
|
|
end loop;
|
4050 |
|
|
end Install_Siblings;
|
4051 |
|
|
|
4052 |
|
|
---------------------------------
|
4053 |
|
|
-- Install_Limited_Withed_Unit --
|
4054 |
|
|
---------------------------------
|
4055 |
|
|
|
4056 |
|
|
procedure Install_Limited_Withed_Unit (N : Node_Id) is
|
4057 |
|
|
P_Unit : constant Entity_Id := Unit (Library_Unit (N));
|
4058 |
|
|
E : Entity_Id;
|
4059 |
|
|
P : Entity_Id;
|
4060 |
|
|
Is_Child_Package : Boolean := False;
|
4061 |
|
|
Lim_Header : Entity_Id;
|
4062 |
|
|
Lim_Typ : Entity_Id;
|
4063 |
|
|
|
4064 |
|
|
procedure Check_Body_Required;
|
4065 |
|
|
-- A unit mentioned in a limited with_clause may not be mentioned in
|
4066 |
|
|
-- a regular with_clause, but must still be included in the current
|
4067 |
|
|
-- partition. We need to determine whether the unit needs a body, so
|
4068 |
|
|
-- that the binder can determine the name of the file to be compiled.
|
4069 |
|
|
-- Checking whether a unit needs a body can be done without semantic
|
4070 |
|
|
-- analysis, by examining the nature of the declarations in the package.
|
4071 |
|
|
|
4072 |
|
|
function Has_Limited_With_Clause
|
4073 |
|
|
(C_Unit : Entity_Id;
|
4074 |
|
|
Pack : Entity_Id) return Boolean;
|
4075 |
|
|
-- Determine whether any package in the ancestor chain starting with
|
4076 |
|
|
-- C_Unit has a limited with clause for package Pack.
|
4077 |
|
|
|
4078 |
|
|
function Is_Visible_Through_Renamings (P : Entity_Id) return Boolean;
|
4079 |
|
|
-- Check if some package installed though normal with-clauses has a
|
4080 |
|
|
-- renaming declaration of package P. AARM 10.1.2(21/2).
|
4081 |
|
|
|
4082 |
|
|
-------------------------
|
4083 |
|
|
-- Check_Body_Required --
|
4084 |
|
|
-------------------------
|
4085 |
|
|
|
4086 |
|
|
procedure Check_Body_Required is
|
4087 |
|
|
PA : constant List_Id :=
|
4088 |
|
|
Pragmas_After (Aux_Decls_Node (Parent (P_Unit)));
|
4089 |
|
|
|
4090 |
|
|
procedure Check_Declarations (Spec : Node_Id);
|
4091 |
|
|
-- Recursive procedure that does the work and checks nested packages
|
4092 |
|
|
|
4093 |
|
|
------------------------
|
4094 |
|
|
-- Check_Declarations --
|
4095 |
|
|
------------------------
|
4096 |
|
|
|
4097 |
|
|
procedure Check_Declarations (Spec : Node_Id) is
|
4098 |
|
|
Decl : Node_Id;
|
4099 |
|
|
Incomplete_Decls : constant Elist_Id := New_Elmt_List;
|
4100 |
|
|
|
4101 |
|
|
Subp_List : constant Elist_Id := New_Elmt_List;
|
4102 |
|
|
|
4103 |
|
|
procedure Check_Pragma_Import (P : Node_Id);
|
4104 |
|
|
-- If a pragma import applies to a previous subprogram, the
|
4105 |
|
|
-- enclosing unit may not need a body. The processing is syntactic
|
4106 |
|
|
-- and does not require a declaration to be analyzed. The code
|
4107 |
|
|
-- below also handles pragma Import when applied to a subprogram
|
4108 |
|
|
-- that renames another. In this case the pragma applies to the
|
4109 |
|
|
-- renamed entity.
|
4110 |
|
|
--
|
4111 |
|
|
-- Chains of multiple renames are not handled by the code below.
|
4112 |
|
|
-- It is probably impossible to handle all cases without proper
|
4113 |
|
|
-- name resolution. In such cases the algorithm is conservative
|
4114 |
|
|
-- and will indicate that a body is needed???
|
4115 |
|
|
|
4116 |
|
|
-------------------------
|
4117 |
|
|
-- Check_Pragma_Import --
|
4118 |
|
|
-------------------------
|
4119 |
|
|
|
4120 |
|
|
procedure Check_Pragma_Import (P : Node_Id) is
|
4121 |
|
|
Arg : Node_Id;
|
4122 |
|
|
Prev_Id : Elmt_Id;
|
4123 |
|
|
Subp_Id : Elmt_Id;
|
4124 |
|
|
Imported : Node_Id;
|
4125 |
|
|
|
4126 |
|
|
procedure Remove_Homonyms (E : Node_Id);
|
4127 |
|
|
-- Make one pass over list of subprograms. Called again if
|
4128 |
|
|
-- subprogram is a renaming. E is known to be an identifier.
|
4129 |
|
|
|
4130 |
|
|
---------------------
|
4131 |
|
|
-- Remove_Homonyms --
|
4132 |
|
|
---------------------
|
4133 |
|
|
|
4134 |
|
|
procedure Remove_Homonyms (E : Node_Id) is
|
4135 |
|
|
R : Entity_Id := Empty;
|
4136 |
|
|
-- Name of renamed entity, if any
|
4137 |
|
|
|
4138 |
|
|
begin
|
4139 |
|
|
Subp_Id := First_Elmt (Subp_List);
|
4140 |
|
|
while Present (Subp_Id) loop
|
4141 |
|
|
if Chars (Node (Subp_Id)) = Chars (E) then
|
4142 |
|
|
if Nkind (Parent (Parent (Node (Subp_Id))))
|
4143 |
|
|
/= N_Subprogram_Renaming_Declaration
|
4144 |
|
|
then
|
4145 |
|
|
Prev_Id := Subp_Id;
|
4146 |
|
|
Next_Elmt (Subp_Id);
|
4147 |
|
|
Remove_Elmt (Subp_List, Prev_Id);
|
4148 |
|
|
else
|
4149 |
|
|
R := Name (Parent (Parent (Node (Subp_Id))));
|
4150 |
|
|
exit;
|
4151 |
|
|
end if;
|
4152 |
|
|
else
|
4153 |
|
|
Next_Elmt (Subp_Id);
|
4154 |
|
|
end if;
|
4155 |
|
|
end loop;
|
4156 |
|
|
|
4157 |
|
|
if Present (R) then
|
4158 |
|
|
if Nkind (R) = N_Identifier then
|
4159 |
|
|
Remove_Homonyms (R);
|
4160 |
|
|
|
4161 |
|
|
elsif Nkind (R) = N_Selected_Component then
|
4162 |
|
|
Remove_Homonyms (Selector_Name (R));
|
4163 |
|
|
|
4164 |
|
|
-- Renaming of attribute
|
4165 |
|
|
|
4166 |
|
|
else
|
4167 |
|
|
null;
|
4168 |
|
|
end if;
|
4169 |
|
|
end if;
|
4170 |
|
|
end Remove_Homonyms;
|
4171 |
|
|
|
4172 |
|
|
-- Start of processing for Check_Pragma_Import
|
4173 |
|
|
|
4174 |
|
|
begin
|
4175 |
|
|
-- Find name of entity in Import pragma. We have not analyzed
|
4176 |
|
|
-- the construct, so we must guard against syntax errors.
|
4177 |
|
|
|
4178 |
|
|
Arg := Next (First (Pragma_Argument_Associations (P)));
|
4179 |
|
|
|
4180 |
|
|
if No (Arg)
|
4181 |
|
|
or else Nkind (Expression (Arg)) /= N_Identifier
|
4182 |
|
|
then
|
4183 |
|
|
return;
|
4184 |
|
|
else
|
4185 |
|
|
Imported := Expression (Arg);
|
4186 |
|
|
end if;
|
4187 |
|
|
|
4188 |
|
|
Remove_Homonyms (Imported);
|
4189 |
|
|
end Check_Pragma_Import;
|
4190 |
|
|
|
4191 |
|
|
-- Start of processing for Check_Declarations
|
4192 |
|
|
|
4193 |
|
|
begin
|
4194 |
|
|
-- Search for Elaborate Body pragma
|
4195 |
|
|
|
4196 |
|
|
Decl := First (Visible_Declarations (Spec));
|
4197 |
|
|
while Present (Decl)
|
4198 |
|
|
and then Nkind (Decl) = N_Pragma
|
4199 |
|
|
loop
|
4200 |
|
|
if Get_Pragma_Id (Decl) = Pragma_Elaborate_Body then
|
4201 |
|
|
Set_Body_Required (Library_Unit (N));
|
4202 |
|
|
return;
|
4203 |
|
|
end if;
|
4204 |
|
|
|
4205 |
|
|
Next (Decl);
|
4206 |
|
|
end loop;
|
4207 |
|
|
|
4208 |
|
|
-- Look for declarations that require the presence of a body. We
|
4209 |
|
|
-- have already skipped pragmas at the start of the list.
|
4210 |
|
|
|
4211 |
|
|
while Present (Decl) loop
|
4212 |
|
|
|
4213 |
|
|
-- Subprogram that comes from source means body may be needed.
|
4214 |
|
|
-- Save for subsequent examination of import pragmas.
|
4215 |
|
|
|
4216 |
|
|
if Comes_From_Source (Decl)
|
4217 |
|
|
and then (Nkind_In (Decl, N_Subprogram_Declaration,
|
4218 |
|
|
N_Subprogram_Renaming_Declaration,
|
4219 |
|
|
N_Generic_Subprogram_Declaration))
|
4220 |
|
|
then
|
4221 |
|
|
Append_Elmt (Defining_Entity (Decl), Subp_List);
|
4222 |
|
|
|
4223 |
|
|
-- Package declaration of generic package declaration. We need
|
4224 |
|
|
-- to recursively examine nested declarations.
|
4225 |
|
|
|
4226 |
|
|
elsif Nkind_In (Decl, N_Package_Declaration,
|
4227 |
|
|
N_Generic_Package_Declaration)
|
4228 |
|
|
then
|
4229 |
|
|
Check_Declarations (Specification (Decl));
|
4230 |
|
|
|
4231 |
|
|
elsif Nkind (Decl) = N_Pragma
|
4232 |
|
|
and then Pragma_Name (Decl) = Name_Import
|
4233 |
|
|
then
|
4234 |
|
|
Check_Pragma_Import (Decl);
|
4235 |
|
|
end if;
|
4236 |
|
|
|
4237 |
|
|
Next (Decl);
|
4238 |
|
|
end loop;
|
4239 |
|
|
|
4240 |
|
|
-- Same set of tests for private part. In addition to subprograms
|
4241 |
|
|
-- detect the presence of Taft Amendment types (incomplete types
|
4242 |
|
|
-- completed in the body).
|
4243 |
|
|
|
4244 |
|
|
Decl := First (Private_Declarations (Spec));
|
4245 |
|
|
while Present (Decl) loop
|
4246 |
|
|
if Comes_From_Source (Decl)
|
4247 |
|
|
and then (Nkind_In (Decl, N_Subprogram_Declaration,
|
4248 |
|
|
N_Subprogram_Renaming_Declaration,
|
4249 |
|
|
N_Generic_Subprogram_Declaration))
|
4250 |
|
|
then
|
4251 |
|
|
Append_Elmt (Defining_Entity (Decl), Subp_List);
|
4252 |
|
|
|
4253 |
|
|
elsif Nkind_In (Decl, N_Package_Declaration,
|
4254 |
|
|
N_Generic_Package_Declaration)
|
4255 |
|
|
then
|
4256 |
|
|
Check_Declarations (Specification (Decl));
|
4257 |
|
|
|
4258 |
|
|
-- Collect incomplete type declarations for separate pass
|
4259 |
|
|
|
4260 |
|
|
elsif Nkind (Decl) = N_Incomplete_Type_Declaration then
|
4261 |
|
|
Append_Elmt (Decl, Incomplete_Decls);
|
4262 |
|
|
|
4263 |
|
|
elsif Nkind (Decl) = N_Pragma
|
4264 |
|
|
and then Pragma_Name (Decl) = Name_Import
|
4265 |
|
|
then
|
4266 |
|
|
Check_Pragma_Import (Decl);
|
4267 |
|
|
end if;
|
4268 |
|
|
|
4269 |
|
|
Next (Decl);
|
4270 |
|
|
end loop;
|
4271 |
|
|
|
4272 |
|
|
-- Now check incomplete declarations to locate Taft amendment
|
4273 |
|
|
-- types. This can be done by examining the defining identifiers
|
4274 |
|
|
-- of type declarations without real semantic analysis.
|
4275 |
|
|
|
4276 |
|
|
declare
|
4277 |
|
|
Inc : Elmt_Id;
|
4278 |
|
|
|
4279 |
|
|
begin
|
4280 |
|
|
Inc := First_Elmt (Incomplete_Decls);
|
4281 |
|
|
while Present (Inc) loop
|
4282 |
|
|
Decl := Next (Node (Inc));
|
4283 |
|
|
while Present (Decl) loop
|
4284 |
|
|
if Nkind (Decl) = N_Full_Type_Declaration
|
4285 |
|
|
and then Chars (Defining_Identifier (Decl)) =
|
4286 |
|
|
Chars (Defining_Identifier (Node (Inc)))
|
4287 |
|
|
then
|
4288 |
|
|
exit;
|
4289 |
|
|
end if;
|
4290 |
|
|
|
4291 |
|
|
Next (Decl);
|
4292 |
|
|
end loop;
|
4293 |
|
|
|
4294 |
|
|
-- If no completion, this is a TAT, and a body is needed
|
4295 |
|
|
|
4296 |
|
|
if No (Decl) then
|
4297 |
|
|
Set_Body_Required (Library_Unit (N));
|
4298 |
|
|
return;
|
4299 |
|
|
end if;
|
4300 |
|
|
|
4301 |
|
|
Next_Elmt (Inc);
|
4302 |
|
|
end loop;
|
4303 |
|
|
end;
|
4304 |
|
|
|
4305 |
|
|
-- Finally, check whether there are subprograms that still
|
4306 |
|
|
-- require a body, i.e. are not renamings or null.
|
4307 |
|
|
|
4308 |
|
|
if not Is_Empty_Elmt_List (Subp_List) then
|
4309 |
|
|
declare
|
4310 |
|
|
Subp_Id : Elmt_Id;
|
4311 |
|
|
Spec : Node_Id;
|
4312 |
|
|
|
4313 |
|
|
begin
|
4314 |
|
|
Subp_Id := First_Elmt (Subp_List);
|
4315 |
|
|
Spec := Parent (Node (Subp_Id));
|
4316 |
|
|
|
4317 |
|
|
while Present (Subp_Id) loop
|
4318 |
|
|
if Nkind (Parent (Spec))
|
4319 |
|
|
= N_Subprogram_Renaming_Declaration
|
4320 |
|
|
then
|
4321 |
|
|
null;
|
4322 |
|
|
|
4323 |
|
|
elsif Nkind (Spec) = N_Procedure_Specification
|
4324 |
|
|
and then Null_Present (Spec)
|
4325 |
|
|
then
|
4326 |
|
|
null;
|
4327 |
|
|
|
4328 |
|
|
else
|
4329 |
|
|
Set_Body_Required (Library_Unit (N));
|
4330 |
|
|
return;
|
4331 |
|
|
end if;
|
4332 |
|
|
|
4333 |
|
|
Next_Elmt (Subp_Id);
|
4334 |
|
|
end loop;
|
4335 |
|
|
end;
|
4336 |
|
|
end if;
|
4337 |
|
|
end Check_Declarations;
|
4338 |
|
|
|
4339 |
|
|
-- Start of processing for Check_Body_Required
|
4340 |
|
|
|
4341 |
|
|
begin
|
4342 |
|
|
-- If this is an imported package (Java and CIL usage) no body is
|
4343 |
|
|
-- needed. Scan list of pragmas that may follow a compilation unit
|
4344 |
|
|
-- to look for a relevant pragma Import.
|
4345 |
|
|
|
4346 |
|
|
if Present (PA) then
|
4347 |
|
|
declare
|
4348 |
|
|
Prag : Node_Id;
|
4349 |
|
|
|
4350 |
|
|
begin
|
4351 |
|
|
Prag := First (PA);
|
4352 |
|
|
while Present (Prag) loop
|
4353 |
|
|
if Nkind (Prag) = N_Pragma
|
4354 |
|
|
and then Get_Pragma_Id (Prag) = Pragma_Import
|
4355 |
|
|
then
|
4356 |
|
|
return;
|
4357 |
|
|
end if;
|
4358 |
|
|
|
4359 |
|
|
Next (Prag);
|
4360 |
|
|
end loop;
|
4361 |
|
|
end;
|
4362 |
|
|
end if;
|
4363 |
|
|
|
4364 |
|
|
Check_Declarations (Specification (P_Unit));
|
4365 |
|
|
end Check_Body_Required;
|
4366 |
|
|
|
4367 |
|
|
-----------------------------
|
4368 |
|
|
-- Has_Limited_With_Clause --
|
4369 |
|
|
-----------------------------
|
4370 |
|
|
|
4371 |
|
|
function Has_Limited_With_Clause
|
4372 |
|
|
(C_Unit : Entity_Id;
|
4373 |
|
|
Pack : Entity_Id) return Boolean
|
4374 |
|
|
is
|
4375 |
|
|
Par : Entity_Id;
|
4376 |
|
|
Par_Unit : Node_Id;
|
4377 |
|
|
|
4378 |
|
|
begin
|
4379 |
|
|
Par := C_Unit;
|
4380 |
|
|
while Present (Par) loop
|
4381 |
|
|
if Ekind (Par) /= E_Package then
|
4382 |
|
|
exit;
|
4383 |
|
|
end if;
|
4384 |
|
|
|
4385 |
|
|
-- Retrieve the Compilation_Unit node for Par and determine if
|
4386 |
|
|
-- its context clauses contain a limited with for Pack.
|
4387 |
|
|
|
4388 |
|
|
Par_Unit := Parent (Parent (Parent (Par)));
|
4389 |
|
|
|
4390 |
|
|
if Nkind (Par_Unit) = N_Package_Declaration then
|
4391 |
|
|
Par_Unit := Parent (Par_Unit);
|
4392 |
|
|
end if;
|
4393 |
|
|
|
4394 |
|
|
if Has_With_Clause (Par_Unit, Pack, True) then
|
4395 |
|
|
return True;
|
4396 |
|
|
end if;
|
4397 |
|
|
|
4398 |
|
|
-- If there are more ancestors, climb up the tree, otherwise
|
4399 |
|
|
-- we are done.
|
4400 |
|
|
|
4401 |
|
|
if Is_Child_Unit (Par) then
|
4402 |
|
|
Par := Scope (Par);
|
4403 |
|
|
else
|
4404 |
|
|
exit;
|
4405 |
|
|
end if;
|
4406 |
|
|
end loop;
|
4407 |
|
|
|
4408 |
|
|
return False;
|
4409 |
|
|
end Has_Limited_With_Clause;
|
4410 |
|
|
|
4411 |
|
|
----------------------------------
|
4412 |
|
|
-- Is_Visible_Through_Renamings --
|
4413 |
|
|
----------------------------------
|
4414 |
|
|
|
4415 |
|
|
function Is_Visible_Through_Renamings (P : Entity_Id) return Boolean is
|
4416 |
|
|
Kind : constant Node_Kind :=
|
4417 |
|
|
Nkind (Unit (Cunit (Current_Sem_Unit)));
|
4418 |
|
|
Aux_Unit : Node_Id;
|
4419 |
|
|
Item : Node_Id;
|
4420 |
|
|
Decl : Entity_Id;
|
4421 |
|
|
|
4422 |
|
|
begin
|
4423 |
|
|
-- Example of the error detected by this subprogram:
|
4424 |
|
|
|
4425 |
|
|
-- package P is
|
4426 |
|
|
-- type T is ...
|
4427 |
|
|
-- end P;
|
4428 |
|
|
|
4429 |
|
|
-- with P;
|
4430 |
|
|
-- package Q is
|
4431 |
|
|
-- package Ren_P renames P;
|
4432 |
|
|
-- end Q;
|
4433 |
|
|
|
4434 |
|
|
-- with Q;
|
4435 |
|
|
-- package R is ...
|
4436 |
|
|
|
4437 |
|
|
-- limited with P; -- ERROR
|
4438 |
|
|
-- package R.C is ...
|
4439 |
|
|
|
4440 |
|
|
Aux_Unit := Cunit (Current_Sem_Unit);
|
4441 |
|
|
|
4442 |
|
|
loop
|
4443 |
|
|
Item := First (Context_Items (Aux_Unit));
|
4444 |
|
|
while Present (Item) loop
|
4445 |
|
|
if Nkind (Item) = N_With_Clause
|
4446 |
|
|
and then not Limited_Present (Item)
|
4447 |
|
|
and then Nkind (Unit (Library_Unit (Item))) =
|
4448 |
|
|
N_Package_Declaration
|
4449 |
|
|
then
|
4450 |
|
|
Decl :=
|
4451 |
|
|
First (Visible_Declarations
|
4452 |
|
|
(Specification (Unit (Library_Unit (Item)))));
|
4453 |
|
|
while Present (Decl) loop
|
4454 |
|
|
if Nkind (Decl) = N_Package_Renaming_Declaration
|
4455 |
|
|
and then Entity (Name (Decl)) = P
|
4456 |
|
|
then
|
4457 |
|
|
-- Generate the error message only if the current unit
|
4458 |
|
|
-- is a package declaration; in case of subprogram
|
4459 |
|
|
-- bodies and package bodies we just return True to
|
4460 |
|
|
-- indicate that the limited view must not be
|
4461 |
|
|
-- installed.
|
4462 |
|
|
|
4463 |
|
|
if Kind = N_Package_Declaration then
|
4464 |
|
|
Error_Msg_N
|
4465 |
|
|
("simultaneous visibility of the limited and " &
|
4466 |
|
|
"unlimited views not allowed", N);
|
4467 |
|
|
Error_Msg_Sloc := Sloc (Item);
|
4468 |
|
|
Error_Msg_NE
|
4469 |
|
|
("\\ unlimited view of & visible through the " &
|
4470 |
|
|
"context clause #", N, P);
|
4471 |
|
|
Error_Msg_Sloc := Sloc (Decl);
|
4472 |
|
|
Error_Msg_NE ("\\ and the renaming #", N, P);
|
4473 |
|
|
end if;
|
4474 |
|
|
|
4475 |
|
|
return True;
|
4476 |
|
|
end if;
|
4477 |
|
|
|
4478 |
|
|
Next (Decl);
|
4479 |
|
|
end loop;
|
4480 |
|
|
end if;
|
4481 |
|
|
|
4482 |
|
|
Next (Item);
|
4483 |
|
|
end loop;
|
4484 |
|
|
|
4485 |
|
|
-- If it is a body not acting as spec, follow pointer to the
|
4486 |
|
|
-- corresponding spec, otherwise follow pointer to parent spec.
|
4487 |
|
|
|
4488 |
|
|
if Present (Library_Unit (Aux_Unit))
|
4489 |
|
|
and then Nkind_In (Unit (Aux_Unit),
|
4490 |
|
|
N_Package_Body, N_Subprogram_Body)
|
4491 |
|
|
then
|
4492 |
|
|
if Aux_Unit = Library_Unit (Aux_Unit) then
|
4493 |
|
|
|
4494 |
|
|
-- Aux_Unit is a body that acts as a spec. Clause has
|
4495 |
|
|
-- already been flagged as illegal.
|
4496 |
|
|
|
4497 |
|
|
return False;
|
4498 |
|
|
|
4499 |
|
|
else
|
4500 |
|
|
Aux_Unit := Library_Unit (Aux_Unit);
|
4501 |
|
|
end if;
|
4502 |
|
|
|
4503 |
|
|
else
|
4504 |
|
|
Aux_Unit := Parent_Spec (Unit (Aux_Unit));
|
4505 |
|
|
end if;
|
4506 |
|
|
|
4507 |
|
|
exit when No (Aux_Unit);
|
4508 |
|
|
end loop;
|
4509 |
|
|
|
4510 |
|
|
return False;
|
4511 |
|
|
end Is_Visible_Through_Renamings;
|
4512 |
|
|
|
4513 |
|
|
-- Start of processing for Install_Limited_Withed_Unit
|
4514 |
|
|
|
4515 |
|
|
begin
|
4516 |
|
|
pragma Assert (not Limited_View_Installed (N));
|
4517 |
|
|
|
4518 |
|
|
-- In case of limited with_clause on subprograms, generics, instances,
|
4519 |
|
|
-- or renamings, the corresponding error was previously posted and we
|
4520 |
|
|
-- have nothing to do here. If the file is missing altogether, it has
|
4521 |
|
|
-- no source location.
|
4522 |
|
|
|
4523 |
|
|
if Nkind (P_Unit) /= N_Package_Declaration
|
4524 |
|
|
or else Sloc (P_Unit) = No_Location
|
4525 |
|
|
then
|
4526 |
|
|
return;
|
4527 |
|
|
end if;
|
4528 |
|
|
|
4529 |
|
|
P := Defining_Unit_Name (Specification (P_Unit));
|
4530 |
|
|
|
4531 |
|
|
-- Handle child packages
|
4532 |
|
|
|
4533 |
|
|
if Nkind (P) = N_Defining_Program_Unit_Name then
|
4534 |
|
|
Is_Child_Package := True;
|
4535 |
|
|
P := Defining_Identifier (P);
|
4536 |
|
|
end if;
|
4537 |
|
|
|
4538 |
|
|
-- Do not install the limited-view if the context of the unit is already
|
4539 |
|
|
-- available through a regular with clause.
|
4540 |
|
|
|
4541 |
|
|
if Nkind (Unit (Cunit (Current_Sem_Unit))) = N_Package_Body
|
4542 |
|
|
and then Has_With_Clause (Cunit (Current_Sem_Unit), P)
|
4543 |
|
|
then
|
4544 |
|
|
return;
|
4545 |
|
|
end if;
|
4546 |
|
|
|
4547 |
|
|
-- Do not install the limited-view if the full-view is already visible
|
4548 |
|
|
-- through renaming declarations.
|
4549 |
|
|
|
4550 |
|
|
if Is_Visible_Through_Renamings (P) then
|
4551 |
|
|
return;
|
4552 |
|
|
end if;
|
4553 |
|
|
|
4554 |
|
|
-- Do not install the limited view if this is the unit being analyzed.
|
4555 |
|
|
-- This unusual case will happen when a unit has a limited_with clause
|
4556 |
|
|
-- on one of its children. The compilation of the child forces the
|
4557 |
|
|
-- load of the parent which tries to install the limited view of the
|
4558 |
|
|
-- child again. Installing the limited view must also be disabled
|
4559 |
|
|
-- when compiling the body of the child unit.
|
4560 |
|
|
|
4561 |
|
|
if P = Cunit_Entity (Current_Sem_Unit)
|
4562 |
|
|
or else
|
4563 |
|
|
(Nkind (Unit (Cunit (Current_Sem_Unit))) = N_Package_Body
|
4564 |
|
|
and then P = Main_Unit_Entity)
|
4565 |
|
|
then
|
4566 |
|
|
return;
|
4567 |
|
|
end if;
|
4568 |
|
|
|
4569 |
|
|
-- This scenario is similar to the one above, the difference is that
|
4570 |
|
|
-- the compilation of sibling Par.Sib forces the load of parent Par
|
4571 |
|
|
-- which tries to install the limited view of Lim_Pack [1]. However
|
4572 |
|
|
-- Par.Sib has a with clause for Lim_Pack [2] in its body, and thus
|
4573 |
|
|
-- needs the non-limited views of all entities from Lim_Pack.
|
4574 |
|
|
|
4575 |
|
|
-- limited with Lim_Pack; -- [1]
|
4576 |
|
|
-- package Par is ... package Lim_Pack is ...
|
4577 |
|
|
|
4578 |
|
|
-- with Lim_Pack; -- [2]
|
4579 |
|
|
-- package Par.Sib is ... package body Par.Sib is ...
|
4580 |
|
|
|
4581 |
|
|
-- In this case Main_Unit_Entity is the spec of Par.Sib and Current_
|
4582 |
|
|
-- Sem_Unit is the body of Par.Sib.
|
4583 |
|
|
|
4584 |
|
|
if Ekind (P) = E_Package
|
4585 |
|
|
and then Ekind (Main_Unit_Entity) = E_Package
|
4586 |
|
|
and then Is_Child_Unit (Main_Unit_Entity)
|
4587 |
|
|
|
4588 |
|
|
-- The body has a regular with clause
|
4589 |
|
|
|
4590 |
|
|
and then Nkind (Unit (Cunit (Current_Sem_Unit))) = N_Package_Body
|
4591 |
|
|
and then Has_With_Clause (Cunit (Current_Sem_Unit), P)
|
4592 |
|
|
|
4593 |
|
|
-- One of the ancestors has a limited with clause
|
4594 |
|
|
|
4595 |
|
|
and then Nkind (Parent (Parent (Main_Unit_Entity))) =
|
4596 |
|
|
N_Package_Specification
|
4597 |
|
|
and then Has_Limited_With_Clause (Scope (Main_Unit_Entity), P)
|
4598 |
|
|
then
|
4599 |
|
|
return;
|
4600 |
|
|
end if;
|
4601 |
|
|
|
4602 |
|
|
-- A common use of the limited-with is to have a limited-with
|
4603 |
|
|
-- in the package spec, and a normal with in its package body.
|
4604 |
|
|
-- For example:
|
4605 |
|
|
|
4606 |
|
|
-- limited with X; -- [1]
|
4607 |
|
|
-- package A is ...
|
4608 |
|
|
|
4609 |
|
|
-- with X; -- [2]
|
4610 |
|
|
-- package body A is ...
|
4611 |
|
|
|
4612 |
|
|
-- The compilation of A's body installs the context clauses found at [2]
|
4613 |
|
|
-- and then the context clauses of its specification (found at [1]). As
|
4614 |
|
|
-- a consequence, at [1] the specification of X has been analyzed and it
|
4615 |
|
|
-- is immediately visible. According to the semantics of limited-with
|
4616 |
|
|
-- context clauses we don't install the limited view because the full
|
4617 |
|
|
-- view of X supersedes its limited view.
|
4618 |
|
|
|
4619 |
|
|
if Analyzed (P_Unit)
|
4620 |
|
|
and then
|
4621 |
|
|
(Is_Immediately_Visible (P)
|
4622 |
|
|
or else (Is_Child_Package and then Is_Visible_Child_Unit (P)))
|
4623 |
|
|
then
|
4624 |
|
|
return;
|
4625 |
|
|
end if;
|
4626 |
|
|
|
4627 |
|
|
if Debug_Flag_I then
|
4628 |
|
|
Write_Str ("install limited view of ");
|
4629 |
|
|
Write_Name (Chars (P));
|
4630 |
|
|
Write_Eol;
|
4631 |
|
|
end if;
|
4632 |
|
|
|
4633 |
|
|
-- If the unit has not been analyzed and the limited view has not been
|
4634 |
|
|
-- already installed then we install it.
|
4635 |
|
|
|
4636 |
|
|
if not Analyzed (P_Unit) then
|
4637 |
|
|
if not In_Chain (P) then
|
4638 |
|
|
|
4639 |
|
|
-- Minimum decoration
|
4640 |
|
|
|
4641 |
|
|
Set_Ekind (P, E_Package);
|
4642 |
|
|
Set_Etype (P, Standard_Void_Type);
|
4643 |
|
|
Set_Scope (P, Standard_Standard);
|
4644 |
|
|
|
4645 |
|
|
if Is_Child_Package then
|
4646 |
|
|
Set_Is_Child_Unit (P);
|
4647 |
|
|
Set_Is_Visible_Child_Unit (P);
|
4648 |
|
|
Set_Scope (P, Defining_Entity (Unit (Parent_Spec (P_Unit))));
|
4649 |
|
|
end if;
|
4650 |
|
|
|
4651 |
|
|
-- Place entity on visibility structure
|
4652 |
|
|
|
4653 |
|
|
Set_Homonym (P, Current_Entity (P));
|
4654 |
|
|
Set_Current_Entity (P);
|
4655 |
|
|
|
4656 |
|
|
if Debug_Flag_I then
|
4657 |
|
|
Write_Str (" (homonym) chain ");
|
4658 |
|
|
Write_Name (Chars (P));
|
4659 |
|
|
Write_Eol;
|
4660 |
|
|
end if;
|
4661 |
|
|
|
4662 |
|
|
-- Install the incomplete view. The first element of the limited
|
4663 |
|
|
-- view is a header (an E_Package entity) used to reference the
|
4664 |
|
|
-- first shadow entity in the private part of the package.
|
4665 |
|
|
|
4666 |
|
|
Lim_Header := Limited_View (P);
|
4667 |
|
|
Lim_Typ := First_Entity (Lim_Header);
|
4668 |
|
|
|
4669 |
|
|
while Present (Lim_Typ)
|
4670 |
|
|
and then Lim_Typ /= First_Private_Entity (Lim_Header)
|
4671 |
|
|
loop
|
4672 |
|
|
Set_Homonym (Lim_Typ, Current_Entity (Lim_Typ));
|
4673 |
|
|
Set_Current_Entity (Lim_Typ);
|
4674 |
|
|
|
4675 |
|
|
if Debug_Flag_I then
|
4676 |
|
|
Write_Str (" (homonym) chain ");
|
4677 |
|
|
Write_Name (Chars (Lim_Typ));
|
4678 |
|
|
Write_Eol;
|
4679 |
|
|
end if;
|
4680 |
|
|
|
4681 |
|
|
Next_Entity (Lim_Typ);
|
4682 |
|
|
end loop;
|
4683 |
|
|
end if;
|
4684 |
|
|
|
4685 |
|
|
-- If the unit appears in a previous regular with_clause, the regular
|
4686 |
|
|
-- entities of the public part of the withed package must be replaced
|
4687 |
|
|
-- by the shadow ones.
|
4688 |
|
|
|
4689 |
|
|
-- This code must be kept synchronized with the code that replaces the
|
4690 |
|
|
-- shadow entities by the real entities (see body of Remove_Limited
|
4691 |
|
|
-- With_Clause); otherwise the contents of the homonym chains are not
|
4692 |
|
|
-- consistent.
|
4693 |
|
|
|
4694 |
|
|
else
|
4695 |
|
|
-- Hide all the type entities of the public part of the package to
|
4696 |
|
|
-- avoid its usage. This is needed to cover all the subtype decla-
|
4697 |
|
|
-- rations because we do not remove them from the homonym chain.
|
4698 |
|
|
|
4699 |
|
|
E := First_Entity (P);
|
4700 |
|
|
while Present (E) and then E /= First_Private_Entity (P) loop
|
4701 |
|
|
if Is_Type (E) then
|
4702 |
|
|
Set_Was_Hidden (E, Is_Hidden (E));
|
4703 |
|
|
Set_Is_Hidden (E);
|
4704 |
|
|
end if;
|
4705 |
|
|
|
4706 |
|
|
Next_Entity (E);
|
4707 |
|
|
end loop;
|
4708 |
|
|
|
4709 |
|
|
-- Replace the real entities by the shadow entities of the limited
|
4710 |
|
|
-- view. The first element of the limited view is a header that is
|
4711 |
|
|
-- used to reference the first shadow entity in the private part
|
4712 |
|
|
-- of the package. Successive elements are the limited views of the
|
4713 |
|
|
-- type (including regular incomplete types) declared in the package.
|
4714 |
|
|
|
4715 |
|
|
Lim_Header := Limited_View (P);
|
4716 |
|
|
|
4717 |
|
|
Lim_Typ := First_Entity (Lim_Header);
|
4718 |
|
|
while Present (Lim_Typ)
|
4719 |
|
|
and then Lim_Typ /= First_Private_Entity (Lim_Header)
|
4720 |
|
|
loop
|
4721 |
|
|
pragma Assert (not In_Chain (Lim_Typ));
|
4722 |
|
|
|
4723 |
|
|
-- Do not unchain nested packages and child units
|
4724 |
|
|
|
4725 |
|
|
if Ekind (Lim_Typ) /= E_Package
|
4726 |
|
|
and then not Is_Child_Unit (Lim_Typ)
|
4727 |
|
|
then
|
4728 |
|
|
declare
|
4729 |
|
|
Prev : Entity_Id;
|
4730 |
|
|
|
4731 |
|
|
begin
|
4732 |
|
|
Prev := Current_Entity (Lim_Typ);
|
4733 |
|
|
E := Prev;
|
4734 |
|
|
|
4735 |
|
|
-- Replace E in the homonyms list, so that the limited
|
4736 |
|
|
-- view becomes available.
|
4737 |
|
|
|
4738 |
|
|
if E = Non_Limited_View (Lim_Typ) then
|
4739 |
|
|
Set_Homonym (Lim_Typ, Homonym (Prev));
|
4740 |
|
|
Set_Current_Entity (Lim_Typ);
|
4741 |
|
|
|
4742 |
|
|
else
|
4743 |
|
|
loop
|
4744 |
|
|
E := Homonym (Prev);
|
4745 |
|
|
|
4746 |
|
|
-- E may have been removed when installing a
|
4747 |
|
|
-- previous limited_with_clause.
|
4748 |
|
|
|
4749 |
|
|
exit when No (E);
|
4750 |
|
|
|
4751 |
|
|
exit when E = Non_Limited_View (Lim_Typ);
|
4752 |
|
|
|
4753 |
|
|
Prev := Homonym (Prev);
|
4754 |
|
|
end loop;
|
4755 |
|
|
|
4756 |
|
|
if Present (E) then
|
4757 |
|
|
Set_Homonym (Lim_Typ, Homonym (Homonym (Prev)));
|
4758 |
|
|
Set_Homonym (Prev, Lim_Typ);
|
4759 |
|
|
end if;
|
4760 |
|
|
end if;
|
4761 |
|
|
end;
|
4762 |
|
|
|
4763 |
|
|
if Debug_Flag_I then
|
4764 |
|
|
Write_Str (" (homonym) chain ");
|
4765 |
|
|
Write_Name (Chars (Lim_Typ));
|
4766 |
|
|
Write_Eol;
|
4767 |
|
|
end if;
|
4768 |
|
|
end if;
|
4769 |
|
|
|
4770 |
|
|
Next_Entity (Lim_Typ);
|
4771 |
|
|
end loop;
|
4772 |
|
|
end if;
|
4773 |
|
|
|
4774 |
|
|
-- The package must be visible while the limited-with clause is active
|
4775 |
|
|
-- because references to the type P.T must resolve in the usual way.
|
4776 |
|
|
-- In addition, we remember that the limited-view has been installed to
|
4777 |
|
|
-- uninstall it at the point of context removal.
|
4778 |
|
|
|
4779 |
|
|
Set_Is_Immediately_Visible (P);
|
4780 |
|
|
Set_Limited_View_Installed (N);
|
4781 |
|
|
|
4782 |
|
|
-- If unit has not been analyzed in some previous context, check
|
4783 |
|
|
-- (imperfectly ???) whether it might need a body.
|
4784 |
|
|
|
4785 |
|
|
if not Analyzed (P_Unit) then
|
4786 |
|
|
Check_Body_Required;
|
4787 |
|
|
end if;
|
4788 |
|
|
|
4789 |
|
|
-- If the package in the limited_with clause is a child unit, the
|
4790 |
|
|
-- clause is unanalyzed and appears as a selected component. Recast
|
4791 |
|
|
-- it as an expanded name so that the entity can be properly set. Use
|
4792 |
|
|
-- entity of parent, if available, for higher ancestors in the name.
|
4793 |
|
|
|
4794 |
|
|
if Nkind (Name (N)) = N_Selected_Component then
|
4795 |
|
|
declare
|
4796 |
|
|
Nam : Node_Id;
|
4797 |
|
|
Ent : Entity_Id;
|
4798 |
|
|
|
4799 |
|
|
begin
|
4800 |
|
|
Nam := Name (N);
|
4801 |
|
|
Ent := P;
|
4802 |
|
|
while Nkind (Nam) = N_Selected_Component
|
4803 |
|
|
and then Present (Ent)
|
4804 |
|
|
loop
|
4805 |
|
|
Change_Selected_Component_To_Expanded_Name (Nam);
|
4806 |
|
|
|
4807 |
|
|
-- Set entity of parent identifiers if the unit is a child
|
4808 |
|
|
-- unit. This ensures that the tree is properly formed from
|
4809 |
|
|
-- semantic point of view (e.g. for ASIS queries).
|
4810 |
|
|
|
4811 |
|
|
Set_Entity (Nam, Ent);
|
4812 |
|
|
|
4813 |
|
|
Nam := Prefix (Nam);
|
4814 |
|
|
Ent := Scope (Ent);
|
4815 |
|
|
|
4816 |
|
|
-- Set entity of last ancestor
|
4817 |
|
|
|
4818 |
|
|
if Nkind (Nam) = N_Identifier then
|
4819 |
|
|
Set_Entity (Nam, Ent);
|
4820 |
|
|
end if;
|
4821 |
|
|
end loop;
|
4822 |
|
|
end;
|
4823 |
|
|
end if;
|
4824 |
|
|
|
4825 |
|
|
Set_Entity (Name (N), P);
|
4826 |
|
|
Set_From_With_Type (P);
|
4827 |
|
|
end Install_Limited_Withed_Unit;
|
4828 |
|
|
|
4829 |
|
|
-------------------------
|
4830 |
|
|
-- Install_Withed_Unit --
|
4831 |
|
|
-------------------------
|
4832 |
|
|
|
4833 |
|
|
procedure Install_Withed_Unit
|
4834 |
|
|
(With_Clause : Node_Id;
|
4835 |
|
|
Private_With_OK : Boolean := False)
|
4836 |
|
|
is
|
4837 |
|
|
Uname : constant Entity_Id := Entity (Name (With_Clause));
|
4838 |
|
|
P : constant Entity_Id := Scope (Uname);
|
4839 |
|
|
|
4840 |
|
|
begin
|
4841 |
|
|
-- Ada 2005 (AI-262): Do not install the private withed unit if we are
|
4842 |
|
|
-- compiling a package declaration and the Private_With_OK flag was not
|
4843 |
|
|
-- set by the caller. These declarations will be installed later (before
|
4844 |
|
|
-- analyzing the private part of the package).
|
4845 |
|
|
|
4846 |
|
|
if Private_Present (With_Clause)
|
4847 |
|
|
and then Nkind (Unit (Parent (With_Clause))) = N_Package_Declaration
|
4848 |
|
|
and then not (Private_With_OK)
|
4849 |
|
|
then
|
4850 |
|
|
return;
|
4851 |
|
|
end if;
|
4852 |
|
|
|
4853 |
|
|
if Debug_Flag_I then
|
4854 |
|
|
if Private_Present (With_Clause) then
|
4855 |
|
|
Write_Str ("install private withed unit ");
|
4856 |
|
|
else
|
4857 |
|
|
Write_Str ("install withed unit ");
|
4858 |
|
|
end if;
|
4859 |
|
|
|
4860 |
|
|
Write_Name (Chars (Uname));
|
4861 |
|
|
Write_Eol;
|
4862 |
|
|
end if;
|
4863 |
|
|
|
4864 |
|
|
-- We do not apply the restrictions to an internal unit unless we are
|
4865 |
|
|
-- compiling the internal unit as a main unit. This check is also
|
4866 |
|
|
-- skipped for dummy units (for missing packages).
|
4867 |
|
|
|
4868 |
|
|
if Sloc (Uname) /= No_Location
|
4869 |
|
|
and then (not Is_Internal_File_Name (Unit_File_Name (Current_Sem_Unit))
|
4870 |
|
|
or else Current_Sem_Unit = Main_Unit)
|
4871 |
|
|
then
|
4872 |
|
|
Check_Restricted_Unit
|
4873 |
|
|
(Unit_Name (Get_Source_Unit (Uname)), With_Clause);
|
4874 |
|
|
end if;
|
4875 |
|
|
|
4876 |
|
|
if P /= Standard_Standard then
|
4877 |
|
|
|
4878 |
|
|
-- If the unit is not analyzed after analysis of the with clause and
|
4879 |
|
|
-- it is an instantiation then it awaits a body and is the main unit.
|
4880 |
|
|
-- Its appearance in the context of some other unit indicates a
|
4881 |
|
|
-- circular dependency (DEC suite perversity).
|
4882 |
|
|
|
4883 |
|
|
if not Analyzed (Uname)
|
4884 |
|
|
and then Nkind (Parent (Uname)) = N_Package_Instantiation
|
4885 |
|
|
then
|
4886 |
|
|
Error_Msg_N
|
4887 |
|
|
("instantiation depends on itself", Name (With_Clause));
|
4888 |
|
|
|
4889 |
|
|
elsif not Is_Visible_Child_Unit (Uname) then
|
4890 |
|
|
Set_Is_Visible_Child_Unit (Uname);
|
4891 |
|
|
|
4892 |
|
|
-- If the child unit appears in the context of its parent, it is
|
4893 |
|
|
-- immediately visible.
|
4894 |
|
|
|
4895 |
|
|
if In_Open_Scopes (Scope (Uname)) then
|
4896 |
|
|
Set_Is_Immediately_Visible (Uname);
|
4897 |
|
|
end if;
|
4898 |
|
|
|
4899 |
|
|
if Is_Generic_Instance (Uname)
|
4900 |
|
|
and then Ekind (Uname) in Subprogram_Kind
|
4901 |
|
|
then
|
4902 |
|
|
-- Set flag as well on the visible entity that denotes the
|
4903 |
|
|
-- instance, which renames the current one.
|
4904 |
|
|
|
4905 |
|
|
Set_Is_Visible_Child_Unit
|
4906 |
|
|
(Related_Instance
|
4907 |
|
|
(Defining_Entity (Unit (Library_Unit (With_Clause)))));
|
4908 |
|
|
end if;
|
4909 |
|
|
|
4910 |
|
|
-- The parent unit may have been installed already, and may have
|
4911 |
|
|
-- appeared in a use clause.
|
4912 |
|
|
|
4913 |
|
|
if In_Use (Scope (Uname)) then
|
4914 |
|
|
Set_Is_Potentially_Use_Visible (Uname);
|
4915 |
|
|
end if;
|
4916 |
|
|
|
4917 |
|
|
Set_Context_Installed (With_Clause);
|
4918 |
|
|
end if;
|
4919 |
|
|
|
4920 |
|
|
elsif not Is_Immediately_Visible (Uname) then
|
4921 |
|
|
if not Private_Present (With_Clause)
|
4922 |
|
|
or else Private_With_OK
|
4923 |
|
|
then
|
4924 |
|
|
Set_Is_Immediately_Visible (Uname);
|
4925 |
|
|
end if;
|
4926 |
|
|
|
4927 |
|
|
Set_Context_Installed (With_Clause);
|
4928 |
|
|
end if;
|
4929 |
|
|
|
4930 |
|
|
-- A with-clause overrides a with-type clause: there are no restric-
|
4931 |
|
|
-- tions on the use of package entities.
|
4932 |
|
|
|
4933 |
|
|
if Ekind (Uname) = E_Package then
|
4934 |
|
|
Set_From_With_Type (Uname, False);
|
4935 |
|
|
end if;
|
4936 |
|
|
|
4937 |
|
|
-- Ada 2005 (AI-377): it is illegal for a with_clause to name a child
|
4938 |
|
|
-- unit if there is a visible homograph for it declared in the same
|
4939 |
|
|
-- declarative region. This pathological case can only arise when an
|
4940 |
|
|
-- instance I1 of a generic unit G1 has an explicit child unit I1.G2,
|
4941 |
|
|
-- G1 has a generic child also named G2, and the context includes with_
|
4942 |
|
|
-- clauses for both I1.G2 and for G1.G2, making an implicit declaration
|
4943 |
|
|
-- of I1.G2 visible as well. If the child unit is named Standard, do
|
4944 |
|
|
-- not apply the check to the Standard package itself.
|
4945 |
|
|
|
4946 |
|
|
if Is_Child_Unit (Uname)
|
4947 |
|
|
and then Is_Visible_Child_Unit (Uname)
|
4948 |
|
|
and then Ada_Version >= Ada_05
|
4949 |
|
|
then
|
4950 |
|
|
declare
|
4951 |
|
|
Decl1 : constant Node_Id := Unit_Declaration_Node (P);
|
4952 |
|
|
Decl2 : Node_Id;
|
4953 |
|
|
P2 : Entity_Id;
|
4954 |
|
|
U2 : Entity_Id;
|
4955 |
|
|
|
4956 |
|
|
begin
|
4957 |
|
|
U2 := Homonym (Uname);
|
4958 |
|
|
while Present (U2)
|
4959 |
|
|
and then U2 /= Standard_Standard
|
4960 |
|
|
loop
|
4961 |
|
|
P2 := Scope (U2);
|
4962 |
|
|
Decl2 := Unit_Declaration_Node (P2);
|
4963 |
|
|
|
4964 |
|
|
if Is_Child_Unit (U2)
|
4965 |
|
|
and then Is_Visible_Child_Unit (U2)
|
4966 |
|
|
then
|
4967 |
|
|
if Is_Generic_Instance (P)
|
4968 |
|
|
and then Nkind (Decl1) = N_Package_Declaration
|
4969 |
|
|
and then Generic_Parent (Specification (Decl1)) = P2
|
4970 |
|
|
then
|
4971 |
|
|
Error_Msg_N ("illegal with_clause", With_Clause);
|
4972 |
|
|
Error_Msg_N
|
4973 |
|
|
("\child unit has visible homograph" &
|
4974 |
|
|
" (RM 8.3(26), 10.1.1(19))",
|
4975 |
|
|
With_Clause);
|
4976 |
|
|
exit;
|
4977 |
|
|
|
4978 |
|
|
elsif Is_Generic_Instance (P2)
|
4979 |
|
|
and then Nkind (Decl2) = N_Package_Declaration
|
4980 |
|
|
and then Generic_Parent (Specification (Decl2)) = P
|
4981 |
|
|
then
|
4982 |
|
|
-- With_clause for child unit of instance appears before
|
4983 |
|
|
-- in the context. We want to place the error message on
|
4984 |
|
|
-- it, not on the generic child unit itself.
|
4985 |
|
|
|
4986 |
|
|
declare
|
4987 |
|
|
Prev_Clause : Node_Id;
|
4988 |
|
|
|
4989 |
|
|
begin
|
4990 |
|
|
Prev_Clause := First (List_Containing (With_Clause));
|
4991 |
|
|
while Entity (Name (Prev_Clause)) /= U2 loop
|
4992 |
|
|
Next (Prev_Clause);
|
4993 |
|
|
end loop;
|
4994 |
|
|
|
4995 |
|
|
pragma Assert (Present (Prev_Clause));
|
4996 |
|
|
Error_Msg_N ("illegal with_clause", Prev_Clause);
|
4997 |
|
|
Error_Msg_N
|
4998 |
|
|
("\child unit has visible homograph" &
|
4999 |
|
|
" (RM 8.3(26), 10.1.1(19))",
|
5000 |
|
|
Prev_Clause);
|
5001 |
|
|
exit;
|
5002 |
|
|
end;
|
5003 |
|
|
end if;
|
5004 |
|
|
end if;
|
5005 |
|
|
|
5006 |
|
|
U2 := Homonym (U2);
|
5007 |
|
|
end loop;
|
5008 |
|
|
end;
|
5009 |
|
|
end if;
|
5010 |
|
|
end Install_Withed_Unit;
|
5011 |
|
|
|
5012 |
|
|
-------------------
|
5013 |
|
|
-- Is_Child_Spec --
|
5014 |
|
|
-------------------
|
5015 |
|
|
|
5016 |
|
|
function Is_Child_Spec (Lib_Unit : Node_Id) return Boolean is
|
5017 |
|
|
K : constant Node_Kind := Nkind (Lib_Unit);
|
5018 |
|
|
|
5019 |
|
|
begin
|
5020 |
|
|
return (K in N_Generic_Declaration or else
|
5021 |
|
|
K in N_Generic_Instantiation or else
|
5022 |
|
|
K in N_Generic_Renaming_Declaration or else
|
5023 |
|
|
K = N_Package_Declaration or else
|
5024 |
|
|
K = N_Package_Renaming_Declaration or else
|
5025 |
|
|
K = N_Subprogram_Declaration or else
|
5026 |
|
|
K = N_Subprogram_Renaming_Declaration)
|
5027 |
|
|
and then Present (Parent_Spec (Lib_Unit));
|
5028 |
|
|
end Is_Child_Spec;
|
5029 |
|
|
|
5030 |
|
|
------------------------------------
|
5031 |
|
|
-- Is_Legal_Shadow_Entity_In_Body --
|
5032 |
|
|
------------------------------------
|
5033 |
|
|
|
5034 |
|
|
function Is_Legal_Shadow_Entity_In_Body (T : Entity_Id) return Boolean is
|
5035 |
|
|
C_Unit : constant Node_Id := Cunit (Current_Sem_Unit);
|
5036 |
|
|
begin
|
5037 |
|
|
return Nkind (Unit (C_Unit)) = N_Package_Body
|
5038 |
|
|
and then
|
5039 |
|
|
Has_With_Clause
|
5040 |
|
|
(C_Unit, Cunit_Entity (Get_Source_Unit (Non_Limited_View (T))));
|
5041 |
|
|
end Is_Legal_Shadow_Entity_In_Body;
|
5042 |
|
|
|
5043 |
|
|
-----------------------
|
5044 |
|
|
-- Load_Needed_Body --
|
5045 |
|
|
-----------------------
|
5046 |
|
|
|
5047 |
|
|
-- N is a generic unit named in a with clause, or else it is a unit that
|
5048 |
|
|
-- contains a generic unit or an inlined function. In order to perform an
|
5049 |
|
|
-- instantiation, the body of the unit must be present. If the unit itself
|
5050 |
|
|
-- is generic, we assume that an instantiation follows, and load & analyze
|
5051 |
|
|
-- the body unconditionally. This forces analysis of the spec as well.
|
5052 |
|
|
|
5053 |
|
|
-- If the unit is not generic, but contains a generic unit, it is loaded on
|
5054 |
|
|
-- demand, at the point of instantiation (see ch12).
|
5055 |
|
|
|
5056 |
|
|
procedure Load_Needed_Body (N : Node_Id; OK : out Boolean) is
|
5057 |
|
|
Body_Name : Unit_Name_Type;
|
5058 |
|
|
Unum : Unit_Number_Type;
|
5059 |
|
|
|
5060 |
|
|
Save_Style_Check : constant Boolean := Opt.Style_Check;
|
5061 |
|
|
-- The loading and analysis is done with style checks off
|
5062 |
|
|
|
5063 |
|
|
begin
|
5064 |
|
|
if not GNAT_Mode then
|
5065 |
|
|
Style_Check := False;
|
5066 |
|
|
end if;
|
5067 |
|
|
|
5068 |
|
|
Body_Name := Get_Body_Name (Get_Unit_Name (Unit (N)));
|
5069 |
|
|
Unum :=
|
5070 |
|
|
Load_Unit
|
5071 |
|
|
(Load_Name => Body_Name,
|
5072 |
|
|
Required => False,
|
5073 |
|
|
Subunit => False,
|
5074 |
|
|
Error_Node => N,
|
5075 |
|
|
Renamings => True);
|
5076 |
|
|
|
5077 |
|
|
if Unum = No_Unit then
|
5078 |
|
|
OK := False;
|
5079 |
|
|
|
5080 |
|
|
else
|
5081 |
|
|
Compiler_State := Analyzing; -- reset after load
|
5082 |
|
|
|
5083 |
|
|
if not Fatal_Error (Unum) or else Try_Semantics then
|
5084 |
|
|
if Debug_Flag_L then
|
5085 |
|
|
Write_Str ("*** Loaded generic body");
|
5086 |
|
|
Write_Eol;
|
5087 |
|
|
end if;
|
5088 |
|
|
|
5089 |
|
|
Semantics (Cunit (Unum));
|
5090 |
|
|
end if;
|
5091 |
|
|
|
5092 |
|
|
OK := True;
|
5093 |
|
|
end if;
|
5094 |
|
|
|
5095 |
|
|
Style_Check := Save_Style_Check;
|
5096 |
|
|
end Load_Needed_Body;
|
5097 |
|
|
|
5098 |
|
|
-------------------------
|
5099 |
|
|
-- Build_Limited_Views --
|
5100 |
|
|
-------------------------
|
5101 |
|
|
|
5102 |
|
|
procedure Build_Limited_Views (N : Node_Id) is
|
5103 |
|
|
Unum : constant Unit_Number_Type := Get_Source_Unit (Library_Unit (N));
|
5104 |
|
|
P : constant Entity_Id := Cunit_Entity (Unum);
|
5105 |
|
|
|
5106 |
|
|
Spec : Node_Id; -- To denote a package specification
|
5107 |
|
|
Lim_Typ : Entity_Id; -- To denote shadow entities
|
5108 |
|
|
Comp_Typ : Entity_Id; -- To denote real entities
|
5109 |
|
|
|
5110 |
|
|
Lim_Header : Entity_Id; -- Package entity
|
5111 |
|
|
Last_Lim_E : Entity_Id := Empty; -- Last limited entity built
|
5112 |
|
|
Last_Pub_Lim_E : Entity_Id; -- To set the first private entity
|
5113 |
|
|
|
5114 |
|
|
procedure Decorate_Incomplete_Type (E : Entity_Id; Scop : Entity_Id);
|
5115 |
|
|
-- Add attributes of an incomplete type to a shadow entity. The same
|
5116 |
|
|
-- attributes are placed on the real entity, so that gigi receives
|
5117 |
|
|
-- a consistent view.
|
5118 |
|
|
|
5119 |
|
|
procedure Decorate_Package_Specification (P : Entity_Id);
|
5120 |
|
|
-- Add attributes of a package entity to the entity in a package
|
5121 |
|
|
-- declaration
|
5122 |
|
|
|
5123 |
|
|
procedure Decorate_Tagged_Type
|
5124 |
|
|
(Loc : Source_Ptr;
|
5125 |
|
|
T : Entity_Id;
|
5126 |
|
|
Scop : Entity_Id);
|
5127 |
|
|
-- Set basic attributes of tagged type T, including its class_wide type.
|
5128 |
|
|
-- The parameters Loc, Scope are used to decorate the class_wide type.
|
5129 |
|
|
|
5130 |
|
|
procedure Build_Chain (Scope : Entity_Id; First_Decl : Node_Id);
|
5131 |
|
|
-- Construct list of shadow entities and attach it to entity of
|
5132 |
|
|
-- package that is mentioned in a limited_with clause.
|
5133 |
|
|
|
5134 |
|
|
function New_Internal_Shadow_Entity
|
5135 |
|
|
(Kind : Entity_Kind;
|
5136 |
|
|
Sloc_Value : Source_Ptr;
|
5137 |
|
|
Id_Char : Character) return Entity_Id;
|
5138 |
|
|
-- Build a new internal entity and append it to the list of shadow
|
5139 |
|
|
-- entities available through the limited-header
|
5140 |
|
|
|
5141 |
|
|
-----------------
|
5142 |
|
|
-- Build_Chain --
|
5143 |
|
|
-----------------
|
5144 |
|
|
|
5145 |
|
|
procedure Build_Chain (Scope : Entity_Id; First_Decl : Node_Id) is
|
5146 |
|
|
Analyzed_Unit : constant Boolean := Analyzed (Cunit (Unum));
|
5147 |
|
|
Is_Tagged : Boolean;
|
5148 |
|
|
Decl : Node_Id;
|
5149 |
|
|
|
5150 |
|
|
begin
|
5151 |
|
|
Decl := First_Decl;
|
5152 |
|
|
while Present (Decl) loop
|
5153 |
|
|
|
5154 |
|
|
-- For each library_package_declaration in the environment, there
|
5155 |
|
|
-- is an implicit declaration of a *limited view* of that library
|
5156 |
|
|
-- package. The limited view of a package contains:
|
5157 |
|
|
|
5158 |
|
|
-- * For each nested package_declaration, a declaration of the
|
5159 |
|
|
-- limited view of that package, with the same defining-
|
5160 |
|
|
-- program-unit name.
|
5161 |
|
|
|
5162 |
|
|
-- * For each type_declaration in the visible part, an incomplete
|
5163 |
|
|
-- type-declaration with the same defining_identifier, whose
|
5164 |
|
|
-- completion is the type_declaration. If the type_declaration
|
5165 |
|
|
-- is tagged, then the incomplete_type_declaration is tagged
|
5166 |
|
|
-- incomplete.
|
5167 |
|
|
|
5168 |
|
|
-- The partial view is tagged if the declaration has the
|
5169 |
|
|
-- explicit keyword, or else if it is a type extension, both
|
5170 |
|
|
-- of which can be ascertained syntactically.
|
5171 |
|
|
|
5172 |
|
|
if Nkind (Decl) = N_Full_Type_Declaration then
|
5173 |
|
|
Is_Tagged :=
|
5174 |
|
|
(Nkind (Type_Definition (Decl)) = N_Record_Definition
|
5175 |
|
|
and then Tagged_Present (Type_Definition (Decl)))
|
5176 |
|
|
or else
|
5177 |
|
|
(Nkind (Type_Definition (Decl)) = N_Derived_Type_Definition
|
5178 |
|
|
and then
|
5179 |
|
|
Present
|
5180 |
|
|
(Record_Extension_Part (Type_Definition (Decl))));
|
5181 |
|
|
|
5182 |
|
|
Comp_Typ := Defining_Identifier (Decl);
|
5183 |
|
|
|
5184 |
|
|
if not Analyzed_Unit then
|
5185 |
|
|
if Is_Tagged then
|
5186 |
|
|
Decorate_Tagged_Type (Sloc (Decl), Comp_Typ, Scope);
|
5187 |
|
|
else
|
5188 |
|
|
Decorate_Incomplete_Type (Comp_Typ, Scope);
|
5189 |
|
|
end if;
|
5190 |
|
|
end if;
|
5191 |
|
|
|
5192 |
|
|
-- Create shadow entity for type
|
5193 |
|
|
|
5194 |
|
|
Lim_Typ :=
|
5195 |
|
|
New_Internal_Shadow_Entity
|
5196 |
|
|
(Kind => Ekind (Comp_Typ),
|
5197 |
|
|
Sloc_Value => Sloc (Comp_Typ),
|
5198 |
|
|
Id_Char => 'Z');
|
5199 |
|
|
|
5200 |
|
|
Set_Chars (Lim_Typ, Chars (Comp_Typ));
|
5201 |
|
|
Set_Parent (Lim_Typ, Parent (Comp_Typ));
|
5202 |
|
|
Set_From_With_Type (Lim_Typ);
|
5203 |
|
|
|
5204 |
|
|
if Is_Tagged then
|
5205 |
|
|
Decorate_Tagged_Type (Sloc (Decl), Lim_Typ, Scope);
|
5206 |
|
|
else
|
5207 |
|
|
Decorate_Incomplete_Type (Lim_Typ, Scope);
|
5208 |
|
|
end if;
|
5209 |
|
|
|
5210 |
|
|
Set_Non_Limited_View (Lim_Typ, Comp_Typ);
|
5211 |
|
|
|
5212 |
|
|
elsif Nkind_In (Decl, N_Private_Type_Declaration,
|
5213 |
|
|
N_Incomplete_Type_Declaration,
|
5214 |
|
|
N_Task_Type_Declaration,
|
5215 |
|
|
N_Protected_Type_Declaration)
|
5216 |
|
|
then
|
5217 |
|
|
Comp_Typ := Defining_Identifier (Decl);
|
5218 |
|
|
|
5219 |
|
|
Is_Tagged :=
|
5220 |
|
|
Nkind_In (Decl, N_Private_Type_Declaration,
|
5221 |
|
|
N_Incomplete_Type_Declaration)
|
5222 |
|
|
and then Tagged_Present (Decl);
|
5223 |
|
|
|
5224 |
|
|
if not Analyzed_Unit then
|
5225 |
|
|
if Is_Tagged then
|
5226 |
|
|
Decorate_Tagged_Type (Sloc (Decl), Comp_Typ, Scope);
|
5227 |
|
|
else
|
5228 |
|
|
Decorate_Incomplete_Type (Comp_Typ, Scope);
|
5229 |
|
|
end if;
|
5230 |
|
|
end if;
|
5231 |
|
|
|
5232 |
|
|
Lim_Typ :=
|
5233 |
|
|
New_Internal_Shadow_Entity
|
5234 |
|
|
(Kind => Ekind (Comp_Typ),
|
5235 |
|
|
Sloc_Value => Sloc (Comp_Typ),
|
5236 |
|
|
Id_Char => 'Z');
|
5237 |
|
|
|
5238 |
|
|
Set_Chars (Lim_Typ, Chars (Comp_Typ));
|
5239 |
|
|
Set_Parent (Lim_Typ, Parent (Comp_Typ));
|
5240 |
|
|
Set_From_With_Type (Lim_Typ);
|
5241 |
|
|
|
5242 |
|
|
if Is_Tagged then
|
5243 |
|
|
Decorate_Tagged_Type (Sloc (Decl), Lim_Typ, Scope);
|
5244 |
|
|
else
|
5245 |
|
|
Decorate_Incomplete_Type (Lim_Typ, Scope);
|
5246 |
|
|
end if;
|
5247 |
|
|
|
5248 |
|
|
Set_Non_Limited_View (Lim_Typ, Comp_Typ);
|
5249 |
|
|
|
5250 |
|
|
elsif Nkind (Decl) = N_Private_Extension_Declaration then
|
5251 |
|
|
Comp_Typ := Defining_Identifier (Decl);
|
5252 |
|
|
|
5253 |
|
|
if not Analyzed_Unit then
|
5254 |
|
|
Decorate_Tagged_Type (Sloc (Decl), Comp_Typ, Scope);
|
5255 |
|
|
end if;
|
5256 |
|
|
|
5257 |
|
|
-- Create shadow entity for type
|
5258 |
|
|
|
5259 |
|
|
Lim_Typ :=
|
5260 |
|
|
New_Internal_Shadow_Entity
|
5261 |
|
|
(Kind => Ekind (Comp_Typ),
|
5262 |
|
|
Sloc_Value => Sloc (Comp_Typ),
|
5263 |
|
|
Id_Char => 'Z');
|
5264 |
|
|
|
5265 |
|
|
Set_Chars (Lim_Typ, Chars (Comp_Typ));
|
5266 |
|
|
Set_Parent (Lim_Typ, Parent (Comp_Typ));
|
5267 |
|
|
Set_From_With_Type (Lim_Typ);
|
5268 |
|
|
|
5269 |
|
|
Decorate_Tagged_Type (Sloc (Decl), Lim_Typ, Scope);
|
5270 |
|
|
Set_Non_Limited_View (Lim_Typ, Comp_Typ);
|
5271 |
|
|
|
5272 |
|
|
elsif Nkind (Decl) = N_Package_Declaration then
|
5273 |
|
|
|
5274 |
|
|
-- Local package
|
5275 |
|
|
|
5276 |
|
|
declare
|
5277 |
|
|
Spec : constant Node_Id := Specification (Decl);
|
5278 |
|
|
|
5279 |
|
|
begin
|
5280 |
|
|
Comp_Typ := Defining_Unit_Name (Spec);
|
5281 |
|
|
|
5282 |
|
|
if not Analyzed (Cunit (Unum)) then
|
5283 |
|
|
Decorate_Package_Specification (Comp_Typ);
|
5284 |
|
|
Set_Scope (Comp_Typ, Scope);
|
5285 |
|
|
end if;
|
5286 |
|
|
|
5287 |
|
|
Lim_Typ :=
|
5288 |
|
|
New_Internal_Shadow_Entity
|
5289 |
|
|
(Kind => Ekind (Comp_Typ),
|
5290 |
|
|
Sloc_Value => Sloc (Comp_Typ),
|
5291 |
|
|
Id_Char => 'Z');
|
5292 |
|
|
|
5293 |
|
|
Decorate_Package_Specification (Lim_Typ);
|
5294 |
|
|
Set_Scope (Lim_Typ, Scope);
|
5295 |
|
|
|
5296 |
|
|
Set_Chars (Lim_Typ, Chars (Comp_Typ));
|
5297 |
|
|
Set_Parent (Lim_Typ, Parent (Comp_Typ));
|
5298 |
|
|
Set_From_With_Type (Lim_Typ);
|
5299 |
|
|
|
5300 |
|
|
-- Note: The non_limited_view attribute is not used
|
5301 |
|
|
-- for local packages.
|
5302 |
|
|
|
5303 |
|
|
Build_Chain
|
5304 |
|
|
(Scope => Lim_Typ,
|
5305 |
|
|
First_Decl => First (Visible_Declarations (Spec)));
|
5306 |
|
|
end;
|
5307 |
|
|
end if;
|
5308 |
|
|
|
5309 |
|
|
Next (Decl);
|
5310 |
|
|
end loop;
|
5311 |
|
|
end Build_Chain;
|
5312 |
|
|
|
5313 |
|
|
------------------------------
|
5314 |
|
|
-- Decorate_Incomplete_Type --
|
5315 |
|
|
------------------------------
|
5316 |
|
|
|
5317 |
|
|
procedure Decorate_Incomplete_Type (E : Entity_Id; Scop : Entity_Id) is
|
5318 |
|
|
begin
|
5319 |
|
|
Set_Ekind (E, E_Incomplete_Type);
|
5320 |
|
|
Set_Scope (E, Scop);
|
5321 |
|
|
Set_Etype (E, E);
|
5322 |
|
|
Set_Is_First_Subtype (E, True);
|
5323 |
|
|
Set_Stored_Constraint (E, No_Elist);
|
5324 |
|
|
Set_Full_View (E, Empty);
|
5325 |
|
|
Init_Size_Align (E);
|
5326 |
|
|
end Decorate_Incomplete_Type;
|
5327 |
|
|
|
5328 |
|
|
--------------------------
|
5329 |
|
|
-- Decorate_Tagged_Type --
|
5330 |
|
|
--------------------------
|
5331 |
|
|
|
5332 |
|
|
procedure Decorate_Tagged_Type
|
5333 |
|
|
(Loc : Source_Ptr;
|
5334 |
|
|
T : Entity_Id;
|
5335 |
|
|
Scop : Entity_Id)
|
5336 |
|
|
is
|
5337 |
|
|
CW : Entity_Id;
|
5338 |
|
|
|
5339 |
|
|
begin
|
5340 |
|
|
Decorate_Incomplete_Type (T, Scop);
|
5341 |
|
|
Set_Is_Tagged_Type (T);
|
5342 |
|
|
|
5343 |
|
|
-- Build corresponding class_wide type, if not previously done
|
5344 |
|
|
|
5345 |
|
|
-- Note: The class-wide entity is shared by the limited-view
|
5346 |
|
|
-- and the full-view.
|
5347 |
|
|
|
5348 |
|
|
if No (Class_Wide_Type (T)) then
|
5349 |
|
|
CW := Make_Defining_Identifier (Loc, New_Internal_Name ('S'));
|
5350 |
|
|
|
5351 |
|
|
-- Set parent to be the same as the parent of the tagged type.
|
5352 |
|
|
-- We need a parent field set, and it is supposed to point to
|
5353 |
|
|
-- the declaration of the type. The tagged type declaration
|
5354 |
|
|
-- essentially declares two separate types, the tagged type
|
5355 |
|
|
-- itself and the corresponding class-wide type, so it is
|
5356 |
|
|
-- reasonable for the parent fields to point to the declaration
|
5357 |
|
|
-- in both cases.
|
5358 |
|
|
|
5359 |
|
|
Set_Parent (CW, Parent (T));
|
5360 |
|
|
|
5361 |
|
|
-- Set remaining fields of classwide type
|
5362 |
|
|
|
5363 |
|
|
Set_Ekind (CW, E_Class_Wide_Type);
|
5364 |
|
|
Set_Etype (CW, T);
|
5365 |
|
|
Set_Scope (CW, Scop);
|
5366 |
|
|
Set_Is_Tagged_Type (CW);
|
5367 |
|
|
Set_Is_First_Subtype (CW, True);
|
5368 |
|
|
Init_Size_Align (CW);
|
5369 |
|
|
Set_Has_Unknown_Discriminants (CW, True);
|
5370 |
|
|
Set_Class_Wide_Type (CW, CW);
|
5371 |
|
|
Set_Equivalent_Type (CW, Empty);
|
5372 |
|
|
Set_From_With_Type (CW, From_With_Type (T));
|
5373 |
|
|
|
5374 |
|
|
-- Link type to its class-wide type
|
5375 |
|
|
|
5376 |
|
|
Set_Class_Wide_Type (T, CW);
|
5377 |
|
|
end if;
|
5378 |
|
|
end Decorate_Tagged_Type;
|
5379 |
|
|
|
5380 |
|
|
------------------------------------
|
5381 |
|
|
-- Decorate_Package_Specification --
|
5382 |
|
|
------------------------------------
|
5383 |
|
|
|
5384 |
|
|
procedure Decorate_Package_Specification (P : Entity_Id) is
|
5385 |
|
|
begin
|
5386 |
|
|
-- Place only the most basic attributes
|
5387 |
|
|
|
5388 |
|
|
Set_Ekind (P, E_Package);
|
5389 |
|
|
Set_Etype (P, Standard_Void_Type);
|
5390 |
|
|
end Decorate_Package_Specification;
|
5391 |
|
|
|
5392 |
|
|
--------------------------------
|
5393 |
|
|
-- New_Internal_Shadow_Entity --
|
5394 |
|
|
--------------------------------
|
5395 |
|
|
|
5396 |
|
|
function New_Internal_Shadow_Entity
|
5397 |
|
|
(Kind : Entity_Kind;
|
5398 |
|
|
Sloc_Value : Source_Ptr;
|
5399 |
|
|
Id_Char : Character) return Entity_Id
|
5400 |
|
|
is
|
5401 |
|
|
E : constant Entity_Id :=
|
5402 |
|
|
Make_Defining_Identifier (Sloc_Value,
|
5403 |
|
|
Chars => New_Internal_Name (Id_Char));
|
5404 |
|
|
|
5405 |
|
|
begin
|
5406 |
|
|
Set_Ekind (E, Kind);
|
5407 |
|
|
Set_Is_Internal (E, True);
|
5408 |
|
|
|
5409 |
|
|
if Kind in Type_Kind then
|
5410 |
|
|
Init_Size_Align (E);
|
5411 |
|
|
end if;
|
5412 |
|
|
|
5413 |
|
|
Append_Entity (E, Lim_Header);
|
5414 |
|
|
Last_Lim_E := E;
|
5415 |
|
|
return E;
|
5416 |
|
|
end New_Internal_Shadow_Entity;
|
5417 |
|
|
|
5418 |
|
|
-- Start of processing for Build_Limited_Views
|
5419 |
|
|
|
5420 |
|
|
begin
|
5421 |
|
|
pragma Assert (Limited_Present (N));
|
5422 |
|
|
|
5423 |
|
|
-- A library_item mentioned in a limited_with_clause is a package
|
5424 |
|
|
-- declaration, not a subprogram declaration, generic declaration,
|
5425 |
|
|
-- generic instantiation, or package renaming declaration.
|
5426 |
|
|
|
5427 |
|
|
case Nkind (Unit (Library_Unit (N))) is
|
5428 |
|
|
when N_Package_Declaration =>
|
5429 |
|
|
null;
|
5430 |
|
|
|
5431 |
|
|
when N_Subprogram_Declaration =>
|
5432 |
|
|
Error_Msg_N ("subprograms not allowed in "
|
5433 |
|
|
& "limited with_clauses", N);
|
5434 |
|
|
return;
|
5435 |
|
|
|
5436 |
|
|
when N_Generic_Package_Declaration |
|
5437 |
|
|
N_Generic_Subprogram_Declaration =>
|
5438 |
|
|
Error_Msg_N ("generics not allowed in "
|
5439 |
|
|
& "limited with_clauses", N);
|
5440 |
|
|
return;
|
5441 |
|
|
|
5442 |
|
|
when N_Generic_Instantiation =>
|
5443 |
|
|
Error_Msg_N ("generic instantiations not allowed in "
|
5444 |
|
|
& "limited with_clauses", N);
|
5445 |
|
|
return;
|
5446 |
|
|
|
5447 |
|
|
when N_Generic_Renaming_Declaration =>
|
5448 |
|
|
Error_Msg_N ("generic renamings not allowed in "
|
5449 |
|
|
& "limited with_clauses", N);
|
5450 |
|
|
return;
|
5451 |
|
|
|
5452 |
|
|
when N_Subprogram_Renaming_Declaration =>
|
5453 |
|
|
Error_Msg_N ("renamed subprograms not allowed in "
|
5454 |
|
|
& "limited with_clauses", N);
|
5455 |
|
|
return;
|
5456 |
|
|
|
5457 |
|
|
when N_Package_Renaming_Declaration =>
|
5458 |
|
|
Error_Msg_N ("renamed packages not allowed in "
|
5459 |
|
|
& "limited with_clauses", N);
|
5460 |
|
|
return;
|
5461 |
|
|
|
5462 |
|
|
when others =>
|
5463 |
|
|
raise Program_Error;
|
5464 |
|
|
end case;
|
5465 |
|
|
|
5466 |
|
|
-- Check if the chain is already built
|
5467 |
|
|
|
5468 |
|
|
Spec := Specification (Unit (Library_Unit (N)));
|
5469 |
|
|
|
5470 |
|
|
if Limited_View_Installed (Spec) then
|
5471 |
|
|
return;
|
5472 |
|
|
end if;
|
5473 |
|
|
|
5474 |
|
|
Set_Ekind (P, E_Package);
|
5475 |
|
|
|
5476 |
|
|
-- Build the header of the limited_view
|
5477 |
|
|
|
5478 |
|
|
Lim_Header :=
|
5479 |
|
|
Make_Defining_Identifier (Sloc (N),
|
5480 |
|
|
Chars => New_Internal_Name (Id_Char => 'Z'));
|
5481 |
|
|
Set_Ekind (Lim_Header, E_Package);
|
5482 |
|
|
Set_Is_Internal (Lim_Header);
|
5483 |
|
|
Set_Limited_View (P, Lim_Header);
|
5484 |
|
|
|
5485 |
|
|
-- Create the auxiliary chain. All the shadow entities are appended to
|
5486 |
|
|
-- the list of entities of the limited-view header
|
5487 |
|
|
|
5488 |
|
|
Build_Chain
|
5489 |
|
|
(Scope => P,
|
5490 |
|
|
First_Decl => First (Visible_Declarations (Spec)));
|
5491 |
|
|
|
5492 |
|
|
-- Save the last built shadow entity. It is needed later to set the
|
5493 |
|
|
-- reference to the first shadow entity in the private part
|
5494 |
|
|
|
5495 |
|
|
Last_Pub_Lim_E := Last_Lim_E;
|
5496 |
|
|
|
5497 |
|
|
-- Ada 2005 (AI-262): Add the limited view of the private declarations
|
5498 |
|
|
-- Required to give support to limited-private-with clauses
|
5499 |
|
|
|
5500 |
|
|
Build_Chain (Scope => P,
|
5501 |
|
|
First_Decl => First (Private_Declarations (Spec)));
|
5502 |
|
|
|
5503 |
|
|
if Last_Pub_Lim_E /= Empty then
|
5504 |
|
|
Set_First_Private_Entity
|
5505 |
|
|
(Lim_Header, Next_Entity (Last_Pub_Lim_E));
|
5506 |
|
|
else
|
5507 |
|
|
Set_First_Private_Entity
|
5508 |
|
|
(Lim_Header, First_Entity (P));
|
5509 |
|
|
end if;
|
5510 |
|
|
|
5511 |
|
|
Set_Limited_View_Installed (Spec);
|
5512 |
|
|
end Build_Limited_Views;
|
5513 |
|
|
|
5514 |
|
|
-------------------------------
|
5515 |
|
|
-- Check_Body_Needed_For_SAL --
|
5516 |
|
|
-------------------------------
|
5517 |
|
|
|
5518 |
|
|
procedure Check_Body_Needed_For_SAL (Unit_Name : Entity_Id) is
|
5519 |
|
|
|
5520 |
|
|
function Entity_Needs_Body (E : Entity_Id) return Boolean;
|
5521 |
|
|
-- Determine whether use of entity E might require the presence of its
|
5522 |
|
|
-- body. For a package this requires a recursive traversal of all nested
|
5523 |
|
|
-- declarations.
|
5524 |
|
|
|
5525 |
|
|
---------------------------
|
5526 |
|
|
-- Entity_Needed_For_SAL --
|
5527 |
|
|
---------------------------
|
5528 |
|
|
|
5529 |
|
|
function Entity_Needs_Body (E : Entity_Id) return Boolean is
|
5530 |
|
|
Ent : Entity_Id;
|
5531 |
|
|
|
5532 |
|
|
begin
|
5533 |
|
|
if Is_Subprogram (E)
|
5534 |
|
|
and then Has_Pragma_Inline (E)
|
5535 |
|
|
then
|
5536 |
|
|
return True;
|
5537 |
|
|
|
5538 |
|
|
elsif Ekind (E) = E_Generic_Function
|
5539 |
|
|
or else Ekind (E) = E_Generic_Procedure
|
5540 |
|
|
then
|
5541 |
|
|
return True;
|
5542 |
|
|
|
5543 |
|
|
elsif Ekind (E) = E_Generic_Package
|
5544 |
|
|
and then
|
5545 |
|
|
Nkind (Unit_Declaration_Node (E)) = N_Generic_Package_Declaration
|
5546 |
|
|
and then Present (Corresponding_Body (Unit_Declaration_Node (E)))
|
5547 |
|
|
then
|
5548 |
|
|
return True;
|
5549 |
|
|
|
5550 |
|
|
elsif Ekind (E) = E_Package
|
5551 |
|
|
and then Nkind (Unit_Declaration_Node (E)) = N_Package_Declaration
|
5552 |
|
|
and then Present (Corresponding_Body (Unit_Declaration_Node (E)))
|
5553 |
|
|
then
|
5554 |
|
|
Ent := First_Entity (E);
|
5555 |
|
|
while Present (Ent) loop
|
5556 |
|
|
if Entity_Needs_Body (Ent) then
|
5557 |
|
|
return True;
|
5558 |
|
|
end if;
|
5559 |
|
|
|
5560 |
|
|
Next_Entity (Ent);
|
5561 |
|
|
end loop;
|
5562 |
|
|
|
5563 |
|
|
return False;
|
5564 |
|
|
|
5565 |
|
|
else
|
5566 |
|
|
return False;
|
5567 |
|
|
end if;
|
5568 |
|
|
end Entity_Needs_Body;
|
5569 |
|
|
|
5570 |
|
|
-- Start of processing for Check_Body_Needed_For_SAL
|
5571 |
|
|
|
5572 |
|
|
begin
|
5573 |
|
|
if Ekind (Unit_Name) = E_Generic_Package
|
5574 |
|
|
and then Nkind (Unit_Declaration_Node (Unit_Name)) =
|
5575 |
|
|
N_Generic_Package_Declaration
|
5576 |
|
|
and then
|
5577 |
|
|
Present (Corresponding_Body (Unit_Declaration_Node (Unit_Name)))
|
5578 |
|
|
then
|
5579 |
|
|
Set_Body_Needed_For_SAL (Unit_Name);
|
5580 |
|
|
|
5581 |
|
|
elsif Ekind (Unit_Name) = E_Generic_Procedure
|
5582 |
|
|
or else
|
5583 |
|
|
Ekind (Unit_Name) = E_Generic_Function
|
5584 |
|
|
then
|
5585 |
|
|
Set_Body_Needed_For_SAL (Unit_Name);
|
5586 |
|
|
|
5587 |
|
|
elsif Is_Subprogram (Unit_Name)
|
5588 |
|
|
and then Nkind (Unit_Declaration_Node (Unit_Name)) =
|
5589 |
|
|
N_Subprogram_Declaration
|
5590 |
|
|
and then Has_Pragma_Inline (Unit_Name)
|
5591 |
|
|
then
|
5592 |
|
|
Set_Body_Needed_For_SAL (Unit_Name);
|
5593 |
|
|
|
5594 |
|
|
elsif Ekind (Unit_Name) = E_Subprogram_Body then
|
5595 |
|
|
Check_Body_Needed_For_SAL
|
5596 |
|
|
(Corresponding_Spec (Unit_Declaration_Node (Unit_Name)));
|
5597 |
|
|
|
5598 |
|
|
elsif Ekind (Unit_Name) = E_Package
|
5599 |
|
|
and then Entity_Needs_Body (Unit_Name)
|
5600 |
|
|
then
|
5601 |
|
|
Set_Body_Needed_For_SAL (Unit_Name);
|
5602 |
|
|
|
5603 |
|
|
elsif Ekind (Unit_Name) = E_Package_Body
|
5604 |
|
|
and then Nkind (Unit_Declaration_Node (Unit_Name)) = N_Package_Body
|
5605 |
|
|
then
|
5606 |
|
|
Check_Body_Needed_For_SAL
|
5607 |
|
|
(Corresponding_Spec (Unit_Declaration_Node (Unit_Name)));
|
5608 |
|
|
end if;
|
5609 |
|
|
end Check_Body_Needed_For_SAL;
|
5610 |
|
|
|
5611 |
|
|
--------------------
|
5612 |
|
|
-- Remove_Context --
|
5613 |
|
|
--------------------
|
5614 |
|
|
|
5615 |
|
|
procedure Remove_Context (N : Node_Id) is
|
5616 |
|
|
Lib_Unit : constant Node_Id := Unit (N);
|
5617 |
|
|
|
5618 |
|
|
begin
|
5619 |
|
|
-- If this is a child unit, first remove the parent units
|
5620 |
|
|
|
5621 |
|
|
if Is_Child_Spec (Lib_Unit) then
|
5622 |
|
|
Remove_Parents (Lib_Unit);
|
5623 |
|
|
end if;
|
5624 |
|
|
|
5625 |
|
|
Remove_Context_Clauses (N);
|
5626 |
|
|
end Remove_Context;
|
5627 |
|
|
|
5628 |
|
|
----------------------------
|
5629 |
|
|
-- Remove_Context_Clauses --
|
5630 |
|
|
----------------------------
|
5631 |
|
|
|
5632 |
|
|
procedure Remove_Context_Clauses (N : Node_Id) is
|
5633 |
|
|
Item : Node_Id;
|
5634 |
|
|
Unit_Name : Entity_Id;
|
5635 |
|
|
|
5636 |
|
|
begin
|
5637 |
|
|
-- Ada 2005 (AI-50217): We remove the context clauses in two phases:
|
5638 |
|
|
-- limited-views first and regular-views later (to maintain the
|
5639 |
|
|
-- stack model).
|
5640 |
|
|
|
5641 |
|
|
-- First Phase: Remove limited_with context clauses
|
5642 |
|
|
|
5643 |
|
|
Item := First (Context_Items (N));
|
5644 |
|
|
while Present (Item) loop
|
5645 |
|
|
|
5646 |
|
|
-- We are interested only in with clauses which got installed
|
5647 |
|
|
-- on entry.
|
5648 |
|
|
|
5649 |
|
|
if Nkind (Item) = N_With_Clause
|
5650 |
|
|
and then Limited_Present (Item)
|
5651 |
|
|
and then Limited_View_Installed (Item)
|
5652 |
|
|
then
|
5653 |
|
|
Remove_Limited_With_Clause (Item);
|
5654 |
|
|
end if;
|
5655 |
|
|
|
5656 |
|
|
Next (Item);
|
5657 |
|
|
end loop;
|
5658 |
|
|
|
5659 |
|
|
-- Second Phase: Loop through context items and undo regular
|
5660 |
|
|
-- with_clauses and use_clauses.
|
5661 |
|
|
|
5662 |
|
|
Item := First (Context_Items (N));
|
5663 |
|
|
while Present (Item) loop
|
5664 |
|
|
|
5665 |
|
|
-- We are interested only in with clauses which got installed on
|
5666 |
|
|
-- entry, as indicated by their Context_Installed flag set
|
5667 |
|
|
|
5668 |
|
|
if Nkind (Item) = N_With_Clause
|
5669 |
|
|
and then Limited_Present (Item)
|
5670 |
|
|
and then Limited_View_Installed (Item)
|
5671 |
|
|
then
|
5672 |
|
|
null;
|
5673 |
|
|
|
5674 |
|
|
elsif Nkind (Item) = N_With_Clause
|
5675 |
|
|
and then Context_Installed (Item)
|
5676 |
|
|
then
|
5677 |
|
|
-- Remove items from one with'ed unit
|
5678 |
|
|
|
5679 |
|
|
Unit_Name := Entity (Name (Item));
|
5680 |
|
|
Remove_Unit_From_Visibility (Unit_Name);
|
5681 |
|
|
Set_Context_Installed (Item, False);
|
5682 |
|
|
|
5683 |
|
|
elsif Nkind (Item) = N_Use_Package_Clause then
|
5684 |
|
|
End_Use_Package (Item);
|
5685 |
|
|
|
5686 |
|
|
elsif Nkind (Item) = N_Use_Type_Clause then
|
5687 |
|
|
End_Use_Type (Item);
|
5688 |
|
|
end if;
|
5689 |
|
|
|
5690 |
|
|
Next (Item);
|
5691 |
|
|
end loop;
|
5692 |
|
|
end Remove_Context_Clauses;
|
5693 |
|
|
|
5694 |
|
|
--------------------------------
|
5695 |
|
|
-- Remove_Limited_With_Clause --
|
5696 |
|
|
--------------------------------
|
5697 |
|
|
|
5698 |
|
|
procedure Remove_Limited_With_Clause (N : Node_Id) is
|
5699 |
|
|
P_Unit : constant Entity_Id := Unit (Library_Unit (N));
|
5700 |
|
|
E : Entity_Id;
|
5701 |
|
|
P : Entity_Id;
|
5702 |
|
|
Lim_Header : Entity_Id;
|
5703 |
|
|
Lim_Typ : Entity_Id;
|
5704 |
|
|
Prev : Entity_Id;
|
5705 |
|
|
|
5706 |
|
|
begin
|
5707 |
|
|
pragma Assert (Limited_View_Installed (N));
|
5708 |
|
|
|
5709 |
|
|
-- In case of limited with_clause on subprograms, generics, instances,
|
5710 |
|
|
-- or renamings, the corresponding error was previously posted and we
|
5711 |
|
|
-- have nothing to do here.
|
5712 |
|
|
|
5713 |
|
|
if Nkind (P_Unit) /= N_Package_Declaration then
|
5714 |
|
|
return;
|
5715 |
|
|
end if;
|
5716 |
|
|
|
5717 |
|
|
P := Defining_Unit_Name (Specification (P_Unit));
|
5718 |
|
|
|
5719 |
|
|
-- Handle child packages
|
5720 |
|
|
|
5721 |
|
|
if Nkind (P) = N_Defining_Program_Unit_Name then
|
5722 |
|
|
P := Defining_Identifier (P);
|
5723 |
|
|
end if;
|
5724 |
|
|
|
5725 |
|
|
if Debug_Flag_I then
|
5726 |
|
|
Write_Str ("remove limited view of ");
|
5727 |
|
|
Write_Name (Chars (P));
|
5728 |
|
|
Write_Str (" from visibility");
|
5729 |
|
|
Write_Eol;
|
5730 |
|
|
end if;
|
5731 |
|
|
|
5732 |
|
|
-- Prepare the removal of the shadow entities from visibility. The
|
5733 |
|
|
-- first element of the limited view is a header (an E_Package
|
5734 |
|
|
-- entity) that is used to reference the first shadow entity in the
|
5735 |
|
|
-- private part of the package
|
5736 |
|
|
|
5737 |
|
|
Lim_Header := Limited_View (P);
|
5738 |
|
|
Lim_Typ := First_Entity (Lim_Header);
|
5739 |
|
|
|
5740 |
|
|
-- Remove package and shadow entities from visibility if it has not
|
5741 |
|
|
-- been analyzed
|
5742 |
|
|
|
5743 |
|
|
if not Analyzed (P_Unit) then
|
5744 |
|
|
Unchain (P);
|
5745 |
|
|
Set_Is_Immediately_Visible (P, False);
|
5746 |
|
|
|
5747 |
|
|
while Present (Lim_Typ) loop
|
5748 |
|
|
Unchain (Lim_Typ);
|
5749 |
|
|
Next_Entity (Lim_Typ);
|
5750 |
|
|
end loop;
|
5751 |
|
|
|
5752 |
|
|
-- Otherwise this package has already appeared in the closure and its
|
5753 |
|
|
-- shadow entities must be replaced by its real entities. This code
|
5754 |
|
|
-- must be kept synchronized with the complementary code in Install
|
5755 |
|
|
-- Limited_Withed_Unit.
|
5756 |
|
|
|
5757 |
|
|
else
|
5758 |
|
|
-- Real entities that are type or subtype declarations were hidden
|
5759 |
|
|
-- from visibility at the point of installation of the limited-view.
|
5760 |
|
|
-- Now we recover the previous value of the hidden attribute.
|
5761 |
|
|
|
5762 |
|
|
E := First_Entity (P);
|
5763 |
|
|
while Present (E) and then E /= First_Private_Entity (P) loop
|
5764 |
|
|
if Is_Type (E) then
|
5765 |
|
|
Set_Is_Hidden (E, Was_Hidden (E));
|
5766 |
|
|
end if;
|
5767 |
|
|
|
5768 |
|
|
Next_Entity (E);
|
5769 |
|
|
end loop;
|
5770 |
|
|
|
5771 |
|
|
while Present (Lim_Typ)
|
5772 |
|
|
and then Lim_Typ /= First_Private_Entity (Lim_Header)
|
5773 |
|
|
loop
|
5774 |
|
|
-- Nested packages and child units were not unchained
|
5775 |
|
|
|
5776 |
|
|
if Ekind (Lim_Typ) /= E_Package
|
5777 |
|
|
and then not Is_Child_Unit (Non_Limited_View (Lim_Typ))
|
5778 |
|
|
then
|
5779 |
|
|
-- If the package has incomplete types, the limited view of the
|
5780 |
|
|
-- incomplete type is in fact never visible (AI05-129) but we
|
5781 |
|
|
-- have created a shadow entity E1 for it, that points to E2,
|
5782 |
|
|
-- a non-limited incomplete type. This in turn has a full view
|
5783 |
|
|
-- E3 that is the full declaration. There is a corresponding
|
5784 |
|
|
-- shadow entity E4. When reinstalling the non-limited view,
|
5785 |
|
|
-- E2 must become the current entity and E3 must be ignored.
|
5786 |
|
|
|
5787 |
|
|
E := Non_Limited_View (Lim_Typ);
|
5788 |
|
|
|
5789 |
|
|
if Present (Current_Entity (E))
|
5790 |
|
|
and then Ekind (Current_Entity (E)) = E_Incomplete_Type
|
5791 |
|
|
and then Full_View (Current_Entity (E)) = E
|
5792 |
|
|
then
|
5793 |
|
|
|
5794 |
|
|
-- Lim_Typ is the limited view of a full type declaration
|
5795 |
|
|
-- that has a previous incomplete declaration, i.e. E3 from
|
5796 |
|
|
-- the previous description. Nothing to insert.
|
5797 |
|
|
|
5798 |
|
|
null;
|
5799 |
|
|
|
5800 |
|
|
else
|
5801 |
|
|
pragma Assert (not In_Chain (E));
|
5802 |
|
|
|
5803 |
|
|
Prev := Current_Entity (Lim_Typ);
|
5804 |
|
|
|
5805 |
|
|
if Prev = Lim_Typ then
|
5806 |
|
|
Set_Current_Entity (E);
|
5807 |
|
|
|
5808 |
|
|
else
|
5809 |
|
|
while Present (Prev)
|
5810 |
|
|
and then Homonym (Prev) /= Lim_Typ
|
5811 |
|
|
loop
|
5812 |
|
|
Prev := Homonym (Prev);
|
5813 |
|
|
end loop;
|
5814 |
|
|
|
5815 |
|
|
if Present (Prev) then
|
5816 |
|
|
Set_Homonym (Prev, E);
|
5817 |
|
|
end if;
|
5818 |
|
|
end if;
|
5819 |
|
|
|
5820 |
|
|
-- Preserve structure of homonym chain
|
5821 |
|
|
|
5822 |
|
|
Set_Homonym (E, Homonym (Lim_Typ));
|
5823 |
|
|
end if;
|
5824 |
|
|
end if;
|
5825 |
|
|
|
5826 |
|
|
Next_Entity (Lim_Typ);
|
5827 |
|
|
end loop;
|
5828 |
|
|
end if;
|
5829 |
|
|
|
5830 |
|
|
-- Indicate that the limited view of the package is not installed
|
5831 |
|
|
|
5832 |
|
|
Set_From_With_Type (P, False);
|
5833 |
|
|
Set_Limited_View_Installed (N, False);
|
5834 |
|
|
end Remove_Limited_With_Clause;
|
5835 |
|
|
|
5836 |
|
|
--------------------
|
5837 |
|
|
-- Remove_Parents --
|
5838 |
|
|
--------------------
|
5839 |
|
|
|
5840 |
|
|
procedure Remove_Parents (Lib_Unit : Node_Id) is
|
5841 |
|
|
P : Node_Id;
|
5842 |
|
|
P_Name : Entity_Id;
|
5843 |
|
|
P_Spec : Node_Id := Empty;
|
5844 |
|
|
E : Entity_Id;
|
5845 |
|
|
Vis : constant Boolean :=
|
5846 |
|
|
Scope_Stack.Table (Scope_Stack.Last).Previous_Visibility;
|
5847 |
|
|
|
5848 |
|
|
begin
|
5849 |
|
|
if Is_Child_Spec (Lib_Unit) then
|
5850 |
|
|
P_Spec := Parent_Spec (Lib_Unit);
|
5851 |
|
|
|
5852 |
|
|
elsif Nkind (Lib_Unit) = N_Package_Body
|
5853 |
|
|
and then Nkind (Original_Node (Lib_Unit)) = N_Package_Instantiation
|
5854 |
|
|
then
|
5855 |
|
|
P_Spec := Parent_Spec (Original_Node (Lib_Unit));
|
5856 |
|
|
end if;
|
5857 |
|
|
|
5858 |
|
|
if Present (P_Spec) then
|
5859 |
|
|
P := Unit (P_Spec);
|
5860 |
|
|
P_Name := Get_Parent_Entity (P);
|
5861 |
|
|
Remove_Context_Clauses (P_Spec);
|
5862 |
|
|
End_Package_Scope (P_Name);
|
5863 |
|
|
Set_Is_Immediately_Visible (P_Name, Vis);
|
5864 |
|
|
|
5865 |
|
|
-- Remove from visibility the siblings as well, which are directly
|
5866 |
|
|
-- visible while the parent is in scope.
|
5867 |
|
|
|
5868 |
|
|
E := First_Entity (P_Name);
|
5869 |
|
|
while Present (E) loop
|
5870 |
|
|
if Is_Child_Unit (E) then
|
5871 |
|
|
Set_Is_Immediately_Visible (E, False);
|
5872 |
|
|
end if;
|
5873 |
|
|
|
5874 |
|
|
Next_Entity (E);
|
5875 |
|
|
end loop;
|
5876 |
|
|
|
5877 |
|
|
Set_In_Package_Body (P_Name, False);
|
5878 |
|
|
|
5879 |
|
|
-- This is the recursive call to remove the context of any higher
|
5880 |
|
|
-- level parent. This recursion ensures that all parents are removed
|
5881 |
|
|
-- in the reverse order of their installation.
|
5882 |
|
|
|
5883 |
|
|
Remove_Parents (P);
|
5884 |
|
|
end if;
|
5885 |
|
|
end Remove_Parents;
|
5886 |
|
|
|
5887 |
|
|
---------------------------------
|
5888 |
|
|
-- Remove_Private_With_Clauses --
|
5889 |
|
|
---------------------------------
|
5890 |
|
|
|
5891 |
|
|
procedure Remove_Private_With_Clauses (Comp_Unit : Node_Id) is
|
5892 |
|
|
Item : Node_Id;
|
5893 |
|
|
|
5894 |
|
|
function In_Regular_With_Clause (E : Entity_Id) return Boolean;
|
5895 |
|
|
-- Check whether a given unit appears in a regular with_clause. Used to
|
5896 |
|
|
-- determine whether a private_with_clause, implicit or explicit, should
|
5897 |
|
|
-- be ignored.
|
5898 |
|
|
|
5899 |
|
|
----------------------------
|
5900 |
|
|
-- In_Regular_With_Clause --
|
5901 |
|
|
----------------------------
|
5902 |
|
|
|
5903 |
|
|
function In_Regular_With_Clause (E : Entity_Id) return Boolean
|
5904 |
|
|
is
|
5905 |
|
|
Item : Node_Id;
|
5906 |
|
|
|
5907 |
|
|
begin
|
5908 |
|
|
Item := First (Context_Items (Comp_Unit));
|
5909 |
|
|
while Present (Item) loop
|
5910 |
|
|
if Nkind (Item) = N_With_Clause
|
5911 |
|
|
and then Entity (Name (Item)) = E
|
5912 |
|
|
and then not Private_Present (Item)
|
5913 |
|
|
then
|
5914 |
|
|
return True;
|
5915 |
|
|
end if;
|
5916 |
|
|
Next (Item);
|
5917 |
|
|
end loop;
|
5918 |
|
|
|
5919 |
|
|
return False;
|
5920 |
|
|
end In_Regular_With_Clause;
|
5921 |
|
|
|
5922 |
|
|
-- Start of processing for Remove_Private_With_Clauses
|
5923 |
|
|
|
5924 |
|
|
begin
|
5925 |
|
|
Item := First (Context_Items (Comp_Unit));
|
5926 |
|
|
while Present (Item) loop
|
5927 |
|
|
if Nkind (Item) = N_With_Clause
|
5928 |
|
|
and then Private_Present (Item)
|
5929 |
|
|
then
|
5930 |
|
|
-- If private_with_clause is redundant, remove it from
|
5931 |
|
|
-- context, as a small optimization to subsequent handling
|
5932 |
|
|
-- of private_with clauses in other nested packages..
|
5933 |
|
|
|
5934 |
|
|
if In_Regular_With_Clause (Entity (Name (Item))) then
|
5935 |
|
|
declare
|
5936 |
|
|
Nxt : constant Node_Id := Next (Item);
|
5937 |
|
|
begin
|
5938 |
|
|
Remove (Item);
|
5939 |
|
|
Item := Nxt;
|
5940 |
|
|
end;
|
5941 |
|
|
|
5942 |
|
|
elsif Limited_Present (Item) then
|
5943 |
|
|
if not Limited_View_Installed (Item) then
|
5944 |
|
|
Remove_Limited_With_Clause (Item);
|
5945 |
|
|
end if;
|
5946 |
|
|
|
5947 |
|
|
Next (Item);
|
5948 |
|
|
|
5949 |
|
|
else
|
5950 |
|
|
Remove_Unit_From_Visibility (Entity (Name (Item)));
|
5951 |
|
|
Set_Context_Installed (Item, False);
|
5952 |
|
|
Next (Item);
|
5953 |
|
|
end if;
|
5954 |
|
|
|
5955 |
|
|
else
|
5956 |
|
|
Next (Item);
|
5957 |
|
|
end if;
|
5958 |
|
|
end loop;
|
5959 |
|
|
end Remove_Private_With_Clauses;
|
5960 |
|
|
|
5961 |
|
|
---------------------------------
|
5962 |
|
|
-- Remove_Unit_From_Visibility --
|
5963 |
|
|
---------------------------------
|
5964 |
|
|
|
5965 |
|
|
procedure Remove_Unit_From_Visibility (Unit_Name : Entity_Id) is
|
5966 |
|
|
P : constant Entity_Id := Scope (Unit_Name);
|
5967 |
|
|
|
5968 |
|
|
begin
|
5969 |
|
|
if Debug_Flag_I then
|
5970 |
|
|
Write_Str ("remove unit ");
|
5971 |
|
|
Write_Name (Chars (Unit_Name));
|
5972 |
|
|
Write_Str (" from visibility");
|
5973 |
|
|
Write_Eol;
|
5974 |
|
|
end if;
|
5975 |
|
|
|
5976 |
|
|
if P /= Standard_Standard then
|
5977 |
|
|
Set_Is_Visible_Child_Unit (Unit_Name, False);
|
5978 |
|
|
end if;
|
5979 |
|
|
|
5980 |
|
|
Set_Is_Potentially_Use_Visible (Unit_Name, False);
|
5981 |
|
|
Set_Is_Immediately_Visible (Unit_Name, False);
|
5982 |
|
|
end Remove_Unit_From_Visibility;
|
5983 |
|
|
|
5984 |
|
|
--------
|
5985 |
|
|
-- sm --
|
5986 |
|
|
--------
|
5987 |
|
|
|
5988 |
|
|
procedure sm is
|
5989 |
|
|
begin
|
5990 |
|
|
null;
|
5991 |
|
|
end sm;
|
5992 |
|
|
|
5993 |
|
|
-------------
|
5994 |
|
|
-- Unchain --
|
5995 |
|
|
-------------
|
5996 |
|
|
|
5997 |
|
|
procedure Unchain (E : Entity_Id) is
|
5998 |
|
|
Prev : Entity_Id;
|
5999 |
|
|
|
6000 |
|
|
begin
|
6001 |
|
|
Prev := Current_Entity (E);
|
6002 |
|
|
|
6003 |
|
|
if No (Prev) then
|
6004 |
|
|
return;
|
6005 |
|
|
|
6006 |
|
|
elsif Prev = E then
|
6007 |
|
|
Set_Name_Entity_Id (Chars (E), Homonym (E));
|
6008 |
|
|
|
6009 |
|
|
else
|
6010 |
|
|
while Present (Prev)
|
6011 |
|
|
and then Homonym (Prev) /= E
|
6012 |
|
|
loop
|
6013 |
|
|
Prev := Homonym (Prev);
|
6014 |
|
|
end loop;
|
6015 |
|
|
|
6016 |
|
|
if Present (Prev) then
|
6017 |
|
|
Set_Homonym (Prev, Homonym (E));
|
6018 |
|
|
end if;
|
6019 |
|
|
end if;
|
6020 |
|
|
|
6021 |
|
|
if Debug_Flag_I then
|
6022 |
|
|
Write_Str (" (homonym) unchain ");
|
6023 |
|
|
Write_Name (Chars (E));
|
6024 |
|
|
Write_Eol;
|
6025 |
|
|
end if;
|
6026 |
|
|
end Unchain;
|
6027 |
|
|
|
6028 |
|
|
end Sem_Ch10;
|