1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- E R R U T I L --
-- --
-- S p e c --
-- --
-- Copyright (C) 2002-2007, 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. --
-- --
------------------------------------------------------------------------------
-- This package contains routines to output error messages and the
-- corresponding instantiation of Styleg, suitable to instantiate Scng.
-- It is not dependent on the GNAT tree packages (Atree, Sinfo, ...)
-- It uses the same global variables as Errout, located in package
-- Err_Vars. Like Errout, it also uses the common variables and routines
-- in package Erroutc.
-- This package is used by the preprocessor (gprep.adb) and the project
-- manager (prj-err.ads).
with Styleg;
with Types; use Types;
package Errutil is
---------------------------------------------------------
-- Error Message Text and Message Insertion Characters --
---------------------------------------------------------
-- Error message text strings are composed of lower case letters, digits
-- and the special characters space, comma, period, colon and semicolon,
-- apostrophe and parentheses. Special insertion characters can also
-- appear which cause the error message circuit to modify the given
-- string. For a full list of these, see the spec of errout.
-----------------------------------------------------
-- Format of Messages and Manual Quotation Control --
-----------------------------------------------------
-- Messages are generally all in lower case, except for inserted names
-- and appear in one of the following two forms:
-- error: text
-- warning: text
-- The prefixes error and warning are supplied automatically (depending
-- on the use of the ? insertion character), and the call to the error
-- message routine supplies the text. The "error: " prefix is omitted
-- in brief error message formats.
-- Reserved keywords in the message are in the default keyword case
-- (determined from the given source program), surrounded by quotation
-- marks. This is achieved by spelling the reserved word in upper case
-- letters, which is recognized as a request for insertion of quotation
-- marks by the error text processor. Thus for example:
-- Error_Msg_AP ("IS expected");
-- would result in the output of one of the following:
-- error: "is" expected
-- error: "IS" expected
-- error: "Is" expected
-- the choice between these being made by looking at the casing convention
-- used for keywords (actually the first compilation unit keyword) in the
-- source file.
-- In the case of names, the default mode for the error text processor
-- is to surround the name by quotation marks automatically. The case
-- used for the identifier names is taken from the source program where
-- possible, and otherwise is the default casing convention taken from
-- the source file usage.
-- In some cases, better control over the placement of quote marks is
-- required. This is achieved using manual quotation mode. In this mode,
-- one or more insertion sequences is surrounded by backquote characters.
-- The backquote characters are output as double quote marks, and normal
-- automatic insertion of quotes is suppressed between the double quotes.
-- For example:
-- Error_Msg_AP ("`END &;` expected");
-- generates a message like
-- error: "end Open_Scope;" expected
-- where the node specifying the name Open_Scope has been stored in
-- Error_Msg_Node_1 prior to the call. The great majority of error
-- messages operates in normal quotation mode.
-- Note: the normal automatic insertion of spaces before insertion
-- sequences (such as those that come from & and %) is suppressed in
-- manual quotation mode, so blanks, if needed as in the above example,
-- must be explicitly present.
------------------------------
-- Error Output Subprograms --
------------------------------
procedure Initialize;
-- Initializes for output of error messages. Must be called for each
-- file before using any of the other routines in the package.
procedure Finalize (Source_Type : String := "project");
-- Finalize processing of error messages for one file and output message
-- indicating the number of detected errors.
-- Source_Type is used in verbose mode to indicate the type of the source
-- being parsed (project file, definition file or input file for the
-- preprocessor).
procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr);
-- Output a message at specified location
procedure Error_Msg_S (Msg : String);
-- Output a message at current scan pointer location
procedure Error_Msg_SC (Msg : String);
-- Output a message at the start of the current token, unless we are at
-- the end of file, in which case we always output the message after the
-- last real token in the file.
procedure Error_Msg_SP (Msg : String);
-- Output a message at the start of the previous token
procedure Set_Ignore_Errors (To : Boolean);
-- Indicate, when To = True, that all reported errors should
-- be ignored. By default reported errors are not ignored.
package Style is new Styleg
(Error_Msg => Error_Msg,
Error_Msg_S => Error_Msg_S,
Error_Msg_SC => Error_Msg_SC,
Error_Msg_SP => Error_Msg_SP);
-- Instantiation of the generic style package, suitable for an
-- instantiation of Scng.
end Errutil;
|
