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Improve tests for stack overflow in GLR parser.

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Problem reported by twlevo@xs4all.nl.
* data/glr.c (struct yyGLRStack): Remove yyerrflag member.
All uses removed.
(yyStackOverflow): Just longjmp, but with value 2 so that caller
can handle the problem.
(YYCHK1): Use goto (a la yacc.c) rather than setting a flag.
(yyparse): New local variable yyresult to record the result.
Use result of setjmp to set it, rather than storing itinto
struct.
(yyDone): Remove label.
(yyacceptlab, yyabortlab, yyoverflowlab, yyreturn): New labels,
to mimic yacc.c.  Do not discard lookahead if it's EOF (possible
if YYABORT is used).
* tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Exit with
yyparse status; put status > 1 into diagnostic.
Check that status==2 works.
* tests/calc.at, tests/cxx-type.at, tests/glr-regression.at:
Use exit status 3 for failure to open (which shouldn't happen).
This commit is contained in:
Paul Eggert
2005-07-18 18:09:40 +00:00
parent 67fd79c427
commit 6100a9aa2e
6 changed files with 65 additions and 29 deletions
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4
tests/calc.at
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@@ -288,7 +288,7 @@ power (int base, int exponent)
{
int res = 1;
if (exponent < 0)
exit (1);
exit (3);
for (/* Niente */; exponent; --exponent)
res *= base;
return res;
@@ -315,7 +315,7 @@ main (int argc, const char **argv)
if (!yyin)
{
perror (argv[1]);
exit (1);
return 3;
}
]AT_LALR1_CC_IF([], [m4_bmatch([$4], [%debug],