------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- E R R U T I L -- -- -- -- S p e c -- -- -- -- Copyright (C) 2002-2022, 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 uses the same global variables as Errout, located in packages Atree and -- Err_Vars. Like Errout, it also uses the common variables and routines -- in package Erroutc. -- This package is used by the preprocessor (gprep.adb). 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;