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yacc.c: always initialize yylloc

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The initial location might be used if the parser starts by an empty
reduction, so really ensure proper initialization of the initial
location.  The previous approach fails for PostgreSQL, which uses
Reported by Peter Eisentraut.
http://lists.gnu.org/archive/html/bug-bison/2012-11/msg00023.html
With help from Théophile Ranquet.

* data/yacc.c (b4_declare_scanner_communication_variables): Be sure
to initialize yylloc, even when its structure is unknown.
(yyparse): Simplify the call to b4_dollar_pushdef.
* tests/actions.at (Initial location): Check of similar pattern
as in the case of PostgreSQL.
This commit is contained in:
Theophile Ranquet
2012-11-19 10:43:56 +00:00
committed by Akim Demaille
parent 53e2cd1ebd
commit fb4c8a7cb9
4 changed files with 47 additions and 10 deletions
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4
NEWS
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@@ -2,6 +2,10 @@ GNU Bison NEWS
* Noteworthy changes in release ?.? (????-??-??) [?]
** Bug fixes
Warnings about uninitialized yylloc in yyparse have been fixed.
** Documentation
The sections about shift/reduce and reduce/reduce conflicts resolution