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--                                                                          --

--                         GNAT COMPILER COMPONENTS                         --

--                                                                          --

--                             P R J . S T R T                              --

--                                                                          --

--                                 S p e c                                  --

--                                                                          --

--          Copyright (C) 2001-2009, 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.      --

--                                                                          --

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--  This package implements parsing of string expressions in project files

with Prj.Tree;  use Prj.Tree;

private package Prj.Strt is

   procedure Parse_String_Type_List

     (In_Tree      : Project_Node_Tree_Ref;

      First_String : out Project_Node_Id;

      Flags        : Processing_Flags);

   --  Get the list of literal strings that are allowed for a typed string.

   --  On entry, the current token is the first literal string following

   --  a left parenthesis in a string type declaration such as:

   --    type Toto is ("string_1", "string_2", "string_3");

   --

   --  On exit, the current token is the right parenthesis. The parameter

   --  First_String is a node that contained the first literal string of the

   --  string type, linked with the following literal strings.

   --

   --  Report an error if

   --    - a literal string is not found at the beginning of the list

   --      or after a comma

   --    - two literal strings in the list are equal

   procedure Start_New_Case_Construction

     (In_Tree     : Project_Node_Tree_Ref;

      String_Type : Project_Node_Id);

   --  This procedure is called at the beginning of a case construction The

   --  parameter String_Type is the node for the string type of the case label

   --  variable. The different literal strings of the string type are stored

   --  into a table to be checked against the case labels of the case

   --  construction.

   procedure End_Case_Construction

     (Check_All_Labels   : Boolean;

      Case_Location      : Source_Ptr;

      Flags              : Processing_Flags);

   --  This procedure is called at the end of a case construction to remove the

   --  case labels and to restore the previous state. In particular, in the

   --  case of nested case constructions, the case labels of the enclosing case

   --  construction are restored. When When_Others is False and we are not in

   --  quiet output, a warning is emitted for each value of the case variable

   --  string type that has not been specified.

   procedure Parse_Choice_List

     (In_Tree      : Project_Node_Tree_Ref;

      First_Choice : out Project_Node_Id;

      Flags        : Processing_Flags);

   --  Get the label for a choice list.

   --  Report an error if

   --    - a case label is not a literal string

   --    - a case label is not in the typed string list

   --    - the same case label is repeated in the same case construction

   procedure Parse_Expression

     (In_Tree         : Project_Node_Tree_Ref;

      Expression      : out Project_Node_Id;

      Current_Project : Project_Node_Id;

      Current_Package : Project_Node_Id;

      Optional_Index  : Boolean;

      Flags           : Processing_Flags);

   --  Parse a simple string expression or a string list expression

   --

   --  Current_Project is the node of the project file being parsed

   --

   --  Current_Package is the node of the package being parsed, or Empty_Node

   --  when we are at the project level (not in a package). On exit, Expression

   --  is the node of the expression that has been parsed.

   procedure Parse_Variable_Reference

     (In_Tree         : Project_Node_Tree_Ref;

      Variable        : out Project_Node_Id;

      Current_Project : Project_Node_Id;

      Current_Package : Project_Node_Id;

      Flags           : Processing_Flags);

   --  Parse variable or attribute reference. Used internally (in expressions)

   --  and for case variables (in Prj.Dect). Current_Package is the node of the

   --  package being parsed, or Empty_Node when we are at the project level

   --  (not in a package). On exit, Variable is the node of the variable or

   --  attribute reference. A variable reference is made of one to three simple

   --  names. An attribute reference is made of one or two simple names,

   --  followed by an apostrophe, followed by the attribute simple name.

end Prj.Strt;