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-------------------------------------------------------------------------------
--- --
--- 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;