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------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- I M P U N I T -- -- -- -- S p e c -- -- -- -- Copyright (C) 2000-2011, Free Software Foundation, Inc. -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- -- ware Foundation; either version 3, or (at your option) any later ver- -- -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- -- for more details. You should have received a copy of the GNU General -- -- Public License distributed with GNAT; see file COPYING3. If not, go to -- -- http://www.gnu.org/licenses for a complete copy of the license. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ -- This package contains data and functions used to determine if a given unit -- is an internal unit intended only for use by the implementation and which -- should not be directly WITH'ed by user code. It also checks for Ada 2005 -- units that should only be WITH'ed in Ada 2005 mode, and Ada 2012 units -- that should only be WITH'ed in Ada 2012 mode. with Types; use Types; package Impunit is type Kind_Of_Unit is (Implementation_Unit, -- Unit from predefined library intended to be used only by the compiler -- generated code, or from the implementation of the run time. Use of -- such a unit generates a warning unless the client is compiled with -- the -gnatg switch. If we are being super strict, this should be an -- error for the case of Ada units, but that seems over strenuous. Not_Predefined_Unit, -- This is not a predefined unit, so no checks are needed Ada_95_Unit, -- This unit is defined in the Ada 95 RM, and can be freely with'ed in -- both Ada 95 mode and Ada 05 mode. Note that in Ada 83 mode, no child -- units are allowed, so you can't even name such a unit. Ada_2005_Unit, -- This unit is defined in the Ada 2005 RM. Withing this unit from an -- Ada 95 mode program will generate a warning (again, strictly speaking -- this should be an error, but that seems over-strenuous). Ada_2012_Unit); -- This unit is defined in the Ada 2012 RM. Withing this unit from an -- Ada 95 or 2005 mode program will generate a warning (again, strictly -- speaking this should be an error, but that seems over-strenuous). function Get_Kind_Of_Unit (U : Unit_Number_Type) return Kind_Of_Unit; -- Given the unit number of a unit, this function determines the type -- of the unit, as defined above. If the result is Implementation_Unit, -- then the name of a possible atlernative equivalent unit is placed in -- Error_Msg_String/Slen on return. If there is no alternative name, or if -- the result is not Implementation_Unit, then Error_Msg_Slen is zero on -- return, indicating that no alternative name was found. function Is_Known_Unit (Nam : Node_Id) return Boolean; -- Nam is the possible name of a child unit, represented as a selected -- component node. This function determines whether the name matches one of -- the known library units, and if so, returns True. If the name does not -- match any known library unit, False is returned. function Not_Impl_Defined_Unit (U : Unit_Number_Type) return Boolean; -- This function returns True if U represents a unit that is permitted by -- the restriction No_Implementation_Units (i.e. a unit in the Ada, System, -- and Interfaces hierarchies that is defined in the RM, or a user defined -- unit. It returns False if U represents a unit that is not permitted by -- this restriction, which includes units in these three hierarchies that -- are GNAT implementation defined. It also returns False for any units in -- the GNAT hierarchy, which is not strictly conforming, but so obviously -- useful that it is a reasonable deviation from the standard. end Impunit;
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