1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT COMPILER COMPONENTS                         --
4--                                                                          --
5--                             P R J . S T R T                              --
6--                                                                          --
7--                                 S p e c                                  --
8--                                                                          --
9--          Copyright (C) 2001-2014, Free Software Foundation, Inc.         --
10--                                                                          --
11-- GNAT is free software;  you can  redistribute it  and/or modify it under --
12-- terms of the  GNU General Public License as published  by the Free Soft- --
13-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
14-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
15-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
16-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
17-- for  more details.  You should have  received  a copy of the GNU General --
18-- Public License  distributed with GNAT; see file COPYING3.  If not, go to --
19-- http://www.gnu.org/licenses for a complete copy of the license.          --
20--                                                                          --
21-- GNAT was originally developed  by the GNAT team at  New York University. --
22-- Extensive contributions were provided by Ada Core Technologies Inc.      --
23--                                                                          --
24------------------------------------------------------------------------------
25
26--  This package implements parsing of string expressions in project files
27
28with Prj.Tree;  use Prj.Tree;
29
30private package Prj.Strt is
31
32   procedure Parse_String_Type_List
33     (In_Tree      : Project_Node_Tree_Ref;
34      First_String : out Project_Node_Id;
35      Flags        : Processing_Flags);
36   --  Get the list of literal strings that are allowed for a typed string.
37   --  On entry, the current token is the first literal string following
38   --  a left parenthesis in a string type declaration such as:
39   --    type Toto is ("string_1", "string_2", "string_3");
40   --
41   --  On exit, the current token is the right parenthesis. The parameter
42   --  First_String is a node that contained the first literal string of the
43   --  string type, linked with the following literal strings.
44   --
45   --  Report an error if
46   --    - a literal string is not found at the beginning of the list
47   --      or after a comma
48   --    - two literal strings in the list are equal
49
50   procedure Start_New_Case_Construction
51     (In_Tree     : Project_Node_Tree_Ref;
52      String_Type : Project_Node_Id);
53   --  This procedure is called at the beginning of a case construction. The
54   --  parameter String_Type is the node for the string type of the case label
55   --  variable. The different literal strings of the string type are stored
56   --  into a table to be checked against the labels of the case construction.
57
58   procedure End_Case_Construction
59     (Check_All_Labels : Boolean;
60      Case_Location    : Source_Ptr;
61      Flags            : Processing_Flags;
62      String_Type      : Boolean);
63   --  This procedure is called at the end of a case construction to remove
64   --  the case labels and to restore the previous state. In particular, in the
65   --  case of nested case constructions, the case labels of the enclosing case
66   --  construction are restored. If When_Others is False and we are not in
67   --  quiet output, a warning is emitted for each value of the case variable
68   --  string type that has not been specified.
69
70   procedure Parse_Choice_List
71     (In_Tree      : Project_Node_Tree_Ref;
72      First_Choice : out Project_Node_Id;
73      Flags        : Processing_Flags;
74      String_Type  : Boolean := True);
75   --  Get the label for a choice list.
76   --  Report an error if
77   --    - a case label is not a literal string
78   --    - a case label is not in the typed string list
79   --    - the same case label is repeated in the same case construction
80
81   procedure Parse_Expression
82     (In_Tree         : Project_Node_Tree_Ref;
83      Expression      : out Project_Node_Id;
84      Current_Project : Project_Node_Id;
85      Current_Package : Project_Node_Id;
86      Optional_Index  : Boolean;
87      Flags           : Processing_Flags);
88   --  Parse a simple string expression or a string list expression
89   --
90   --  Current_Project is the node of the project file being parsed
91   --
92   --  Current_Package is the node of the package being parsed, or Empty_Node
93   --  when we are at the project level (not in a package). On exit, Expression
94   --  is the node of the expression that has been parsed.
95
96   procedure Parse_Variable_Reference
97     (In_Tree         : Project_Node_Tree_Ref;
98      Variable        : out Project_Node_Id;
99      Current_Project : Project_Node_Id;
100      Current_Package : Project_Node_Id;
101      Flags           : Processing_Flags);
102   --  Parse variable or attribute reference. Used internally (in expressions)
103   --  and for case variables (in Prj.Dect). Current_Package is the node of the
104   --  package being parsed, or Empty_Node when we are at the project level
105   --  (not in a package). On exit, Variable is the node of the variable or
106   --  attribute reference. A variable reference is made of one to three simple
107   --  names. An attribute reference is made of one or two simple names,
108   --  followed by an apostrophe, followed by the attribute simple name.
109
110end Prj.Strt;
111