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glr.cc: don't issue two error messages when syntax_error is thrown

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Reported by Askar Safin.
https://lists.gnu.org/archive/html/bison-patches/2019-01/msg00000.html

* data/skeletons/glr.c (yygetToken): Return YYEMPTY when an exception
is thrown.
* data/skeletons/lalr1.cc: Log when an exception is caught.
* tests/c++.at (Syntax error as exception): Be sure to recover from
error before triggering another error.
This commit is contained in:
Akim Demaille
2019-01-02 11:43:08 +01:00
parent 5be47a73e8
commit 80ef7e7639
3 changed files with 19 additions and 7 deletions
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2
data/skeletons/lalr1.cc
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@@ -827,6 +827,7 @@ b4_dollar_popdef])[]dnl
#if YY_EXCEPTIONS
catch (const syntax_error& yyexc)
{
YYCDEBUG << "Caught exception: " << yyexc.what() << '\n';
error (yyexc);
goto yyerrlab1;
}
@@ -916,6 +917,7 @@ b4_dollar_popdef])[]dnl
#if YY_EXCEPTIONS
catch (const syntax_error& yyexc)
{
YYCDEBUG << "Caught exception: " << yyexc.what() << '\n';
error (yyexc);
YYERROR;
}