Future/bison
1
0
Fork 0
mirror of https://git.savannah.gnu.org/git/bison.git synced 2026-03-19 01:03:04 +00:00
Code Issues Packages Projects Releases Wiki Activity

api.prefix: also rename YYDEBUG.

Browse Source 
The testsuite in master has shown weird errors for the "Mulitple
Parsers" tests: the caller of p5.parse() received some apparently
random value, while tracing p5.parse() showed that the function was
consistently returning 0.

It happens when mixing several parser headers, some generated without
%debug, others with.  In particular the C++ parser was generated with
%debug, i.e., with:

  #ifndef YYDEBUG
  # define YYDEBUG 1
  #endif

and compiled separatedly.  Yet, its header was included after the one
of another parser, this time without %debug, i.e., with

  #ifndef YYDEBUG
  # define YYDEBUG 0
  #endif

in its header.  As a result, the parser was compiled with YYDEBUG set,
but its header was used without.  Since the layout of the objects are
then completely different, boom.

Therefore, do not change the value of YYDEBUG.  Rather, use it as a
default value for <API.PREFIX>DEBUG.

* data/c.m4 (b4_YYDEBUG_define): New.
(b4_declare_yydebug): Rename as...
(b4_yydebug_declare): this, for consistency.
* data/glr.c, data/glr.cc, data/lalr1.cc, data/yacc.c: Use it.
* NEWS: Document it.
This commit is contained in:
Akim Demaille
2012-07-02 14:56:22 +02:00
parent 242cc08e8d
commit 5f108727a1
6 changed files with 76 additions and 55 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
NEWS
View File

@@ -94,10 +94,19 @@ GNU Bison NEWS
# define BAR_FOO_H # define BAR_FOO_H
/* Enabling traces. */ /* Enabling traces. */
# ifndef YYDEBUG # ifndef YYDEBUG
# define YYDEBUG 0 # define YYDEBUG 0
# endif # endif
# if YYDEBUG # if YYDEBUG
# ifndef YYDEBUG | # ifndef BAR_DEBUG
> # if defined YYDEBUG
> # if YYDEBUG
> # define BAR_DEBUG 1
> # else
> # define BAR_DEBUG 0
> # endif
> # else
# define YYDEBUG 0 | # define BAR_DEBUG 0
> # endif
# endif | # endif
# if YYDEBUG | # if BAR_DEBUG
extern int bar_debug; extern int bar_debug;
# endif # endif