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Fix strange %define locations for default values.

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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.
This commit is contained in:
Joel E. Denny
2009-04-03 03:13:36 -04:00
parent e021191bcf
commit 92822affc5
6 changed files with 68 additions and 30 deletions
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47
src/location.c
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@@ -1,5 +1,6 @@
/* Locations for Bison
Copyright (C) 2002, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
Copyright (C) 2002, 2005, 2006, 2007, 2008, 2009 Free Software Foundation,
Inc.
This file is part of Bison, the GNU Compiler Compiler.
@@ -100,21 +101,37 @@ location_compute (location *loc, boundary *cur, char const *token, size_t size)
void
location_print (FILE *out, location loc)
{
int end_col = 0 < loc.end.column ? loc.end.column - 1 : 0;
fprintf (out, "%s:%d",
quotearg_n_style (3, escape_quoting_style, loc.start.file),
loc.start.line);
if (0 <= loc.start.column)
fprintf (out, ".%d", loc.start.column);
int end_col = 0 != loc.end.column ? loc.end.column - 1 : 0;
fprintf (out, "%s",
quotearg_n_style (3, escape_quoting_style, loc.start.file));
if (0 <= loc.start.line)
{
fprintf(out, ":%d", loc.start.line);
if (0 <= loc.start.column)
fprintf (out, ".%d", loc.start.column);
}
if (loc.start.file != loc.end.file)
fprintf (out, "-%s:%d.%d",
quotearg_n_style (3, escape_quoting_style, loc.end.file),
loc.end.line, end_col);
else if (loc.start.line < loc.end.line)
fprintf (out, "-%d.%d", loc.end.line, end_col);
else if (0 <= loc.start.column && loc.start.column < end_col)
fprintf (out, "-%d", end_col);
{
fprintf (out, "-%s",
quotearg_n_style (3, escape_quoting_style, loc.end.file));
if (0 <= loc.end.line)
{
fprintf(out, ":%d", loc.end.line);
if (0 <= end_col)
fprintf (out, ".%d", end_col);
}
}
else if (0 <= loc.end.line)
{
if (loc.start.line < loc.end.line)
{
fprintf (out, "-%d", loc.end.line);
if (0 <= end_col)
fprintf (out, ".%d", end_col);
}
else if (0 <= end_col && loc.start.column < end_col)
fprintf (out, "-%d", end_col);
}
}
void