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580c075d7f
Reported by Akim Demaille at <http://lists.gnu.org/archive/html/bug-bison/2007-12/msg00001.html> and discussed again starting at <http://lists.gnu.org/archive/html/bison-patches/2008-11/msg00102.html>. * data/bison.m4 (b4_percent_define_default): Leave syncline blank because location information is bogus. Use angle brackets to delimit fake file name because square brackets look like over-quoted m4. Choose a better fake file name. Use negative line numbers. * src/muscle_tab.c (muscle_percent_define_default): Likewise. * src/location.c (location_print): If line for a boundary is negative, only print that boundary's file name. * src/location.h: Document that. * tests/skeletons.at (%define Boolean variables: invalid skeleton defaults): Update output.
94 lines
2.6 KiB
C
94 lines
2.6 KiB
C
/* Locations for Bison
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Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009 Free Software
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Foundation, Inc.
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This file is part of Bison, the GNU Compiler Compiler.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef LOCATION_H_
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# define LOCATION_H_
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# include "uniqstr.h"
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/* A boundary between two characters. */
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typedef struct
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{
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/* The name of the file that contains the boundary. */
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uniqstr file;
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/* If nonnegative, the (origin-1) line that contains the boundary.
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If this is INT_MAX, the line number has overflowed.
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Meaningless and not displayed if negative.
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*/
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int line;
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/* If nonnegative, the (origin-1) column just after the boundary.
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This is neither a byte count, nor a character count; it is a
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column count. If this is INT_MAX, the column number has
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overflowed.
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Meaningless and not displayed if negative.
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*/
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int column;
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} boundary;
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/* Set the position of \a a. */
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static inline void
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boundary_set (boundary *b, const char *f, int l, int c)
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{
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b->file = f;
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b->line = l;
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b->column = c;
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}
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/* Return nonzero if A and B are equal boundaries. */
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static inline bool
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equal_boundaries (boundary a, boundary b)
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{
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return (a.column == b.column
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&& a.line == b.line
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&& UNIQSTR_EQ (a.file, b.file));
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}
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/* A location, that is, a region of source code. */
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typedef struct
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{
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/* Boundary just before the location starts. */
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boundary start;
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/* Boundary just after the location ends. */
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boundary end;
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} location;
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#define YYLTYPE location
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#define EMPTY_LOCATION_INIT {{NULL, 0, 0}, {NULL, 0, 0}}
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extern location const empty_location;
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/* Set *LOC and adjust scanner cursor to account for token TOKEN of
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size SIZE. */
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void location_compute (location *loc,
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boundary *cur, char const *token, size_t size);
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void location_print (FILE *out, location loc);
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/* LOC_STR must be formatted as `file:line.column', it will be modified. */
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void boundary_set_from_string (boundary *bound, char *loc_str);
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#endif /* ! defined LOCATION_H_ */
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