gcc/ada/prj-strt.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                             P R J . S T R T                              --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --                                                                          --
  10 --             Copyright (C) 2001 Free Software Foundation, Inc.            --
  11 --                                                                          --
  12 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  13 -- terms of the  GNU General Public License as published  by the Free Soft- --
  14 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  15 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  16 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  17 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  18 -- for  more details.  You should have  received  a copy of the GNU General --
  19 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  20 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  21 -- MA 02111-1307, USA.                                                      --
  22 --                                                                          --
  23 -- GNAT was originally developed  by the GNAT team at  New York University. --
  24 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  25 --                                                                          --
  26 ------------------------------------------------------------------------------
  27 --
  28 --  This package implements parsing of string expressions in project files.
  29
  30 with Prj.Tree;  use Prj.Tree;
  31
  32 private package Prj.Strt is
  33
  34    procedure Parse_String_Type_List (First_String : out Project_Node_Id);
  35    --  Get the list of literal strings that are allowed for a typed string.
  36    --  On entry, the current token is the first literal string following
  37    --  a left parenthesis in a string type declaration such as:
  38    --    type Toto is ("string_1", "string_2", "string_3");
  39    --  On exit, the current token is the right parenthesis.
  40    --  The parameter First_String is a node that contained the first
  41    --  literal string of the string type, linked with the following
  42    --  literal strings.
  43    --
  44    --  Report an error if
  45    --    - a literal string is not found at the beginning of the list
  46    --      or after a comma
  47    --    - two literal strings in the list are equal
  48
  49    procedure Start_New_Case_Construction (String_Type : Project_Node_Id);
  50    --  This procedure is called at the beginning of a case construction
  51    --  The parameter String_Type is the node for the string type
  52    --  of the case label variable.
  53    --  The different literal strings of the string type are stored
  54    --  into a table to be checked against the case labels of the
  55    --  case construction.
  56
  57    procedure End_Case_Construction;
  58    --  This procedure is called at the end of a case construction
  59    --  to remove the case labels and to restore the previous state.
  60    --  In particular, in the case of nested case constructions,
  61    --  the case labels of the enclosing case construction are restored.
  62
  63    procedure Parse_Choice_List
  64      (First_Choice : out Project_Node_Id);
  65    --  Get the label for a choice list.
  66    --  Report an error if
  67    --    - a case label is not a literal string
  68    --    - a case label is not in the typed string list
  69    --    - the same case label is repeated in the same case construction
  70
  71    procedure Parse_Expression
  72      (Expression      : out Project_Node_Id;
  73       Current_Project : Project_Node_Id;
  74       Current_Package : Project_Node_Id);
  75    --  Parse a simple string expression or a string list expression.
  76    --  Current_Project is the node of the project file being parsed.
  77    --  Current_Package is the node of the package being parsed,
  78    --  or Empty_Node when we are at the project level (not in a package).
  79    --  On exit, Expression is the node of the expression that has
  80    --  been parsed.
  81
  82    procedure Parse_Variable_Reference
  83      (Variable        : out Project_Node_Id;
  84       Current_Project : Project_Node_Id;
  85       Current_Package : Project_Node_Id);
  86    --  Parse a variable or attribute reference.
  87    --  Used internally (in expressions) and for case variables (in Prj.Dect).
  88    --  Current_Package is the node of the package being parsed,
  89    --  or Empty_Node when we are at the project level (not in a package).
  90    --  On exit, Variable is the node of the variable or attribute reference.
  91    --  A variable reference is made of one to three simple names.
  92    --  An attribute reference is made of one or two simple names,
  93    --  followed by an apostroph, followed by the attribute simple name.
  94
  95 end Prj.Strt;