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yacc.c: install backward compatibility for YYERRCODE

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Some people have been using that symbol.  Some even have #defined it
themselves.
https://lists.gnu.org/r/bison-patches/2020-04/msg00138.html

Let's provide backward compatibility, having it point to YYUNDEF, so
that an error message is generated.

* data/skeletons/yacc.c (YYERRCODE): New, at the exact same location
it was defined before.
This commit is contained in:
Akim Demaille
2020-04-28 08:26:49 +02:00
parent 902a235ad3
commit 3b05de2d05
3 changed files with 8 additions and 4 deletions
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6
TODO
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@@ -27,12 +27,10 @@ Beware that returning 0 is unclear: does it mean there are no possible
lookahead, or that there are too many?
** YYerror
yacc.c should `#define YYERRCODE YYerror` in the *.c for sake of the
projects that used it. In particular
https://git.savannah.gnu.org/gitweb/?p=gettext.git;a=blob;f=gettext-runtime/intl/plural.y;h=a712255af4f2f739c93336d4ff6556d932a426a5;hb=HEAD
should be updated.
should be updated to not use YYERRCODE. Returning an undef token is good
enough.
** Java
*** Examples