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When reducing initial empty rules, Bison parser read an initial

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location that is not defined.  This results in garbage, and that
affects Bison's own parser.  Therefore we need (i) to extend Bison
to support a means to initialize this location, and (ii) to use
this CVS Bison to fix CVS Bison's parser.
* src/reader.h, reader.c (epilogue_augment): Remove, replace
with...
* src/muscle_tab.h, src/muscle_tab.c (muscle_code_grow): this.
* src/parse-gram.y: Adjust.
(%initial-action): New.
(%error-verbose): Since we require CVS Bison, there is no reason
not to use it.
* src/scan-gram.l: Adjust.
* src/Makefile.am (YACC): New, to make sure we use our own parser.
* data/yacc.c (yyparse): Use b4_initial_action.
This commit is contained in:
Akim Demaille
2003-08-25 15:16:25 +00:00
parent 388f8b197d
commit cd3684cfa8
12 changed files with 524 additions and 434 deletions
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20
src/muscle_tab.c
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@@ -154,6 +154,26 @@ muscle_grow (const char *key, const char *val, const char *separator)
}
/*------------------------------------------------------------------.
| Append VALUE to the current value of KEY, using muscle_grow. But |
| in addition, issue a synchronization line for the location LOC. |
`------------------------------------------------------------------*/
void
muscle_code_grow (const char *key, const char *val, location loc)
{
char *extension = NULL;
obstack_fgrow1 (&muscle_obstack, "]b4_syncline([[%d]], [[", loc.start.line);
MUSCLE_OBSTACK_SGROW (&muscle_obstack,
quotearg_style (c_quoting_style, loc.start.file));
obstack_sgrow (&muscle_obstack, "]])[\n");
obstack_sgrow (&muscle_obstack, val);
obstack_1grow (&muscle_obstack, 0);
extension = obstack_finish (&muscle_obstack);
muscle_grow (key, extension, "");
}
/*-------------------------------------------------------------------.
| MUSCLE is an M4 list of pairs. Create or extend it with the pair |
| (A1, A2). Note that because the muscle values are output *double* |