File : 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 -- 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
28 with Prj.Tree; use Prj.Tree;
29
30 private 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
110 end Prj.Strt;