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ltlparse: diagnose empty (...) block in lenient mode.

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* src/ltlparse/ltlparse.yy (try_recursive_parse): Diagnose
empty strings.
* src/ltltest/lenient.test: Add tests.
This commit is contained in:
Alexandre Duret-Lutz 2012-10-18 00:23:34 +02:00
parent ff0eada81d
commit 676ab41f6f
2 changed files with 16 additions and 1 deletions
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10
src/ltlparse/ltlparse.yy
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@ -108,6 +108,14 @@ using namespace spot::ltl;
// Otherwise, we convert the string into an atomic proposition
// (it's up to the environment to check the syntax of this
// proposition, and maybe reject it).
if (str.empty())
{
error_list.push_back(parse_error(location,
"unexpected empty block"));
return 0;
}
spot::ltl::parse_error_list suberror;
const spot::ltl::formula* f;
if (sere)
@ -802,7 +810,7 @@ subformula: booleanatom
delete $1;
if (!$$)
YYERROR;
$$ = binop::instance(binop::EConcat, $$,
$$ = binop::instance(binop::EConcat, $$,
constant::true_instance());
}