New Language: Ada

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@45956 138bc75d-0d04-0410-961f-82ee72b054a4

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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                             P R J . S T R T                              --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--                            $Revision: 1.4 $
+--                                                                          --
+--             Copyright (C) 2001 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 2,  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 COPYING.  If not, write --
+-- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
+-- MA 02111-1307, USA.                                                      --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+--                                                                          --
+------------------------------------------------------------------------------
+--
+--  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 (First_String : out Project_Node_Id);
+   --  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 (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;
+   --  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.
+
+   procedure Parse_Choice_List
+     (First_Choice : out Project_Node_Id);
+   --  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
+     (Expression      : out Project_Node_Id;
+      Current_Project : Project_Node_Id;
+      Current_Package : Project_Node_Id);
+   --  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
+     (Variable        : out Project_Node_Id;
+      Current_Project : Project_Node_Id;
+      Current_Package : Project_Node_Id);
+   --  Parse a 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 apostroph, followed by the attribute simple name.
+
+end Prj.Strt;