From: Akim Demaille Date: Mon, 22 Oct 2012 14:04:12 +0000 (+0200) Subject: Merge branch '2.6.3' into maint X-Git-Tag: v2.6.90~54 X-Git-Url: https://git.saurik.com/bison.git/commitdiff_plain/b7226022b07fac385defbf2297892d8c3dc3cd18 Merge branch '2.6.3' into maint * 2.6.3: (22 commits) maint: post-release administrivia version 2.6.3 gnulib: update tests: check %no-lines NEWS: warnings with clang warnings: avoid warnings from clang tests: no longer disable -O compiler options yacc.c: initialize yylval in pure-parser mode skeletons: style changes tests: minor improvements tests: use $PERL instead of perl build: look for Perl in configure. tests: fix sed portability issues tests: diff -u is not portable maint: word changes lalr1.cc: fix test suite portability maint: fix an erroneous include tests: check that headers are self contained doc: add missing documentation for --report headers: move CPP guards into YY_*_INCLUDED to avoid collisions ... Conflicts: NEWS doc/bison.texi tests/headers.at --- b7226022b07fac385defbf2297892d8c3dc3cd18 diff --cc NEWS index d1b66564,083d90a9..0f2446bc --- a/NEWS +++ b/NEWS @@@ -2,97 -2,51 +2,99 @@@ GNU Bison NEW * Noteworthy changes in release ?.? (????-??-??) [?] - ** Bug fixes - - Bugs and portability issues in the test suite have been fixed. - - Some errors in translations have been addressed, and --help now directs - users to the appropriate place to report them. - - Stray Info files shipped by accident are removed. - - Incorrect definitions of YY_, issued by yacc.c when no parser header is - generated, are removed. - - All the generated headers are self-contained. - +** Changes in the format of error messages + + This used to be the format of many error reports: + + foo.y:5.10-24: result type clash on merge function 'merge': != + foo.y:4.13-27: previous declaration + + It is now: + + foo.y:5.10-25: result type clash on merge function 'merge': != + foo.y:4.13-27: previous declaration + - ** Header guards (yacc.c, glr.c, glr.cc) - - In order to avoid collisions, the header guards are now - YY___INCLUDED, instead of merely _. - For instance the header generated from - - %define api.prefix "calc" - %defines "lib/parse.h" - - will use YY_CALC_LIB_PARSE_H_INCLUDED as guard. - +** Exception safety (lalr1.cc) + + The parse function now catches exceptions, uses the %destructors to + release memory (the lookahead symbol and the symbols pushed on the stack) + before re-throwing the exception. + + This feature is somewhat experimental. User feedback would be + appreciated. + - ** Fix compiler warnings in the generated parser (yacc.c, glr.c) - - The compilation of pure parsers (%define api.pure) can trigger GCC - warnings such as: - - input.c: In function 'yyparse': - input.c:1503:12: warning: 'yylval' may be used uninitialized in this - function [-Wmaybe-uninitialized] - *++yyvsp = yylval; - ^ - - This is now fixed; pragmas to avoid these warnings are no longer needed. - - Warnings from clang ("equality comparison with extraneous parentheses" and - "function declared 'noreturn' should not return") have also been - addressed. - +** New %define variable: api.location.type (glr.cc, lalr1.cc, lalr1.java) + + The %define variable api.location.type defines the name of the type to use + for locations. When defined, Bison no longer generates the position.hh + and location.hh files, nor does the parser will include them: the user is + then responsible to define her type. + + This can be used in programs with several parsers to factor their location + and position files: let one of them generate them, and the others just use + them. + + This feature was actually introduced, but not documented, in Bison 2.5, + under the name "location_type" (which is maintained for backward + compatibility). + + For consistency, lalr1.java's %define variables location_type and + position_type are deprecated in favor of api.location.type and + api.position.type. + +** Graphviz improvements + + The graphical presentation of the states is more readable: their shape is + now rectangular, the state number is clearly displayed, and the items are + numbered and left-justified. + + The reductions are now explicitly represented as transitions to other + diamond shaped nodes. + * Noteworthy changes in release 2.6.3 (2012-10-22) [stable] + + ** Bug fixes + + Bugs and portability issues in the test suite have been fixed. + + Some errors in translations have been addressed, and --help now directs + users to the appropriate place to report them. + + Stray Info files shipped by accident are removed. + + Incorrect definitions of YY_, issued by yacc.c when no parser header is + generated, are removed. + + All the generated headers are self-contained. + + ** Header guards (yacc.c, glr.c, glr.cc) + + In order to avoid collisions, the header guards are now + YY___INCLUDED, instead of merely _. + For instance the header generated from + + %define api.prefix "calc" + %defines "lib/parse.h" + + will use YY_CALC_LIB_PARSE_H_INCLUDED as guard. + + ** Fix compiler warnings in the generated parser (yacc.c, glr.c) + + The compilation of pure parsers (%define api.pure) can trigger GCC + warnings such as: + + input.c: In function 'yyparse': + input.c:1503:12: warning: 'yylval' may be used uninitialized in this + function [-Wmaybe-uninitialized] + *++yyvsp = yylval; + ^ + + This is now fixed; pragmas to avoid these warnings are no longer needed. + + Warnings from clang ("equality comparison with extraneous parentheses" and + "function declared 'noreturn' should not return") have also been + addressed. + * Noteworthy changes in release 2.6.2 (2012-08-03) [stable] ** Bug fixes diff --cc doc/bison.texi index 4cca4636,ba18d9a9..8f98aa5e --- a/doc/bison.texi +++ b/doc/bison.texi @@@ -11993,7 -11792,7 +11993,8 @@@ London, Department of Computer Science @c LocalWords: getLVal defvar deftypefn deftypefnx gotos msgfmt Corbett LALR's @c LocalWords: subdirectory Solaris nonassociativity perror schemas Malloy ints @c LocalWords: Scannerless ispell american ChangeLog smallexample CSTYPE CLTYPE -@c LocalWords: clval CDEBUG cdebug deftypeopx yyterminate +@c LocalWords: clval CDEBUG cdebug deftypeopx yyterminate LocationType ++@c LocalWords: errorVerbose @c Local Variables: @c ispell-dictionary: "american"