Paul Eggert [Mon, 13 Mar 2006 23:21:29 +0000 (23:21 +0000)]
Remove @shorttitlepage stuff; it wasn't used
and didn't really work.
For the index, use @ifnotinfo, not @iftex.
Minor cleanups of spacing and terminology.
Akim Demaille [Sun, 12 Mar 2006 14:45:27 +0000 (14:45 +0000)]
Apply --prefix to C++ skeletons too: they change the namespace.
The test suite already exercize these cases.
* data/c++.m4 (b4_namespace): New.
* data/lalr1.cc, data/glr.cc, data/location.cc: Use it instead of `yy'.
* data/lalr1.cc (yytnameerr_): Move its definition into the namespace.
* data/yacc.c, data/glr.c: Remove a useless `[]'.
* doc/bison.texinfo: Document it.
(Option Cross Key): Use @multitable in all formats. It looks
nicer, even in TeX outputs.
(Rules): Use the same code whatever the output type is.
* tests/local.at (_AT_BISON_OPTION_PUSHDEFS)
(_AT_BISON_OPTION_POPDEFS): Support AT_NAME_PREFIX.
* tests/calc.at: Use it, instead of hard coding `yy'.
Akim Demaille [Fri, 10 Mar 2006 13:30:19 +0000 (13:30 +0000)]
* data/c.m4 (b4_token_enum): Always define the enum of tokens,
even if empty.
* data/lalrl1.cc, data/glr.cc (parser::token_type): New.
* doc/bison.texinfo (Calc++ Scanner): Use it.
Paul Eggert [Wed, 8 Mar 2006 19:45:10 +0000 (19:45 +0000)]
Fix some nits reported by twlevo.
* doc/FAQ: Remove ancient Y2K FAQ, replacing it with "secure"
and "POSIX". Use more-modern syntax for URLs. Mention C++
and ask for Java. Don't hardwire OS version numbers. Add
copyright notice.
* m4/.cvsignore: Add unistd_h.m4, for latest gnulib.
* src/conflicts.c (solved_conflicts_obstack): Now static.
Joel E. Denny [Wed, 8 Mar 2006 19:34:56 +0000 (19:34 +0000)]
* doc/bison.texinfo (Introduction): Mention GLR and C++ as on the web
page. Say "you can use it" not "you may use it" as on the web page;
we're describing capabilities not granting permission.
Paul Eggert [Tue, 7 Mar 2006 06:42:23 +0000 (06:42 +0000)]
* data/glr.c (yyresolveLocations): Rename local variables to avoid
shadowing warnings. Use usual patter for iterating through RHS.
* tests/glr-regression.at
(Uninitialized location when reporting ambiguity):
Modify yylex so that it uses its argument, rather than trying
to rely on ARGSUSED (which doesn't work for gcc with warnings).
const char -> char const.
Joel E. Denny [Mon, 6 Mar 2006 07:39:11 +0000 (07:39 +0000)]
* tests/glr-regression.at (Uninitialized location when reporting
ambiguity): New test case.
* data/glr.c (yyresolveLocations): New function, which uses
YYLLOC_DEFAULT.
(yyresolveValue): Invoke yyresolveLocations before reporting an
ambiguity.
* doc/bison.texinfo (Default Action for Locations): Note
YYLLOC_DEFAULT's usage for ambiguity locations.
(GLR Semantic Actions): Cross-reference those notes.
Joel E. Denny [Sat, 4 Mar 2006 03:29:03 +0000 (03:29 +0000)]
* tests/glr-regression.at (Leaked semantic values when reporting
ambiguity): Remove unnecessary union and type declarations.
(Leaked lookahead after nondeterministic parse syntax error): New test
case.
* data/glr.c (yyparse): Check for zero stacks remaining before
attempting to shift the lookahead so that you don't lose it.
Joel E. Denny [Thu, 2 Mar 2006 06:18:09 +0000 (06:18 +0000)]
Avoid memory leaks by not invoking longjmp in yyreportAmbiguity.
* tests/glr-regression.at (Leaked semantic values when reporting
ambiguity): New test case.
* data/glr.c (yyreportAmbiguity): Invoke yyyerror directly and return
yyabort rather than invoking yyFail, which invokes longjmp. Remove the
now unnecessary yystackp parameter.
(yyresolveValue): Return yyreportAmbiguity's result. Now the necessary
destructors can be called.
* tests/glr-regression.at: Don't invoke bison with `-t' unnecessarily
in existing testcases.
Joel E. Denny [Thu, 2 Mar 2006 01:35:15 +0000 (01:35 +0000)]
Don't leak semantic values for parent RHS when a user action cuts the
parser, and clean up related code a bit.
* tests/glr-regression.at (Leaked merged semantic value if user action
cuts parse) Rename to...
(Leaked semantic values if user action cuts parse) ... this. Add check
for leaked parent RHS values.
* data/glr.c (yydestroyGLRState): In debugging output, distinguish
between an unresolved state (non-empty chain of semantic options) and
an incomplete one (signaled by an empty chain).
(yyresolveStates): Document the interface. Move all manipulation of an
successfully or unsuccessfully resolved yyGLRState to...
(yyresolveValue): ... here so that yyresolveValue always leaves a
yyGLRState with consistent data and thus is easier to understand.
Remove the yyvalp and yylocp parameters since they are always just
taken from the yys parameter. When reporting a discarded merged value
in debugging output, note that it is incompletely merged. Document the
interface.
(yyresolveAction): If resolving any of the RHS states fails, destroy
them all rather than leaking them. Thus, as long as user actions are
written to clean up the RHS correctly, yyresolveAction always cleans up
the RHS of a semantic option. Document the interface.
Joel E. Denny [Tue, 21 Feb 2006 21:01:57 +0000 (21:01 +0000)]
* doc/bison.texinfo (Mid-Rule Actions): Explain how to bury a
mid-rule action inside a nonterminal symbol in order to declare a
destructor for its semantic value.
Paul Eggert [Fri, 17 Feb 2006 00:08:17 +0000 (00:08 +0000)]
* data/yacc.c [(! defined yyoverflow || YYERROR_VERBOSE) && !
YYSTACK_USE_ALLOCA && ! defined YYSTACK_ALLOC && defined
__cplusplus && ! defined _STDLIB_H && !
((defined YYMALLOC || defined malloc) && (defined YYFREE ||
defined free))]: Include <stdlib.h> rather than rolling our own
declarations of malloc and free, to avoid problems with
incompatible declarations (using 'throw') C++'s stdlib.h. This
should fix Debian bug 340012
<http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=340012>,
reported by Guillaume Melquiond.
Paul Eggert [Fri, 10 Feb 2006 08:00:30 +0000 (08:00 +0000)]
* m4/cxx.m4 (BISON_TEST_FOR_WORKING_CXX_COMPILER): Catch a
configuration screwup "./configure CC=/opt/SUNWspro/bin/c89
CFLAGS="-xarch=generic64" CXX=/opt/SUNWspro/bin/CC
LDFLAGS="-xarch=generic64" with Sun C 5.7 on Solaris 10; this
messes up because C++ code is compiled in 32-bit mode but linked
in 64-bit mode.
Paul Eggert [Wed, 8 Feb 2006 18:56:01 +0000 (18:56 +0000)]
* examples/calc++/Makefile.am (check_PROGRAMS): Renamed from
nodist_PROGRAMS, since we don't need to actually compile the
example if we're just doing a plain 'make'. This avoids bothering
the installer unnecessarily about problems due to weird C++
compilers.
Joel E. Denny [Mon, 30 Jan 2006 11:15:15 +0000 (11:15 +0000)]
During deterministic GLR operation, user actions should be able to
influence the parse by changing yychar. To make this easier to fix and
to make glr.c easier to evolve in general, don't maintain yytoken in
parallel with yychar; just compute yytoken when needed.
* tests/glr-regression.at (Incorrect lookahead during deterministic
GLR): Check that setting yychar in a user action has the intended
effect.
* data/glr.c (yyGLRStack): Remove yytokenp member.
(yyclearin): Don't set *yytokenp.
(yyprocessOneStack, yyreportSyntaxError, yyrecoverSyntaxError): Examine
yychar rather than *yytokenp to determine the current lookahead.
Compute yytoken locally when needed.
(yyparse): Likewise. Remove the local yytoken that yytokenp used to
point to.
* doc/bison.texinfo (Bison Options): Remove stray sentence fragment
after `--report' documentation.
Paul Eggert [Mon, 30 Jan 2006 09:00:40 +0000 (09:00 +0000)]
* src/parse-gram.y (grammar_declaration): Location of printer
symbol is @1, not list->location.
* tests/input.at (Incompatible Aliases): Adjust to above change.
Paul Eggert [Mon, 30 Jan 2006 07:26:00 +0000 (07:26 +0000)]
Fix a longstanding bug uncovered by bro-0.9a9/src/parse.y, which I
got from <http://bro-ids.org/download.html>. The bug is that
when two actions appeared in succession, the second one was
scanned before the first one was added to the grammar rule
as a midrule action. Bison then output the incorrect warning
"parse.y:905.17-906.36: warning: unused value: $3".
* src/parse-gram.y (BRACED_CODE, action): These are no longer
associated with a value.
(rhs): Don't invoke grammar_current_rule_action_append.
(action): Invoke it here instead.
* src/reader.c (grammar_midrule_action): Now extern.
(grammar_current_rule_action_append): Don't invoke
grammar_midrule_action; that is now the scanner's job.
* src/reader.h (last_string, last_braced_code_loc):
(grammar_midrule_action): New decls.
* src/scan-gram.l (last_string): Now extern, sigh.
(last_braced_code_loc): New extern variable.
(<INITIAL>"{"): Invoke grammar_midrule_action if the current
rule already has an action.
(<SC_BRACED_CODE>"}"): Set last_braced_code_loc before returning.
* tests/input.at (AT_CHECK_UNUSED_VALUES):
Add some tests to check that the above changes fixed the bug.
Paul Eggert [Fri, 27 Jan 2006 22:51:00 +0000 (22:51 +0000)]
* src/reader.c (symbol_should_be_used): Renamed from symbol_typed_p.
All used changed. Check whether the symbol has a destructor,
not whether it is typed.
* tests/input.at (AT_CHECK_UNUSED_VALUES): Add a destructor, so
that the values are still reported as unused. All line numbers
adjusted.
Paul Eggert [Mon, 23 Jan 2006 08:39:52 +0000 (08:39 +0000)]
Work around a bug in bro 0.8, which underparenthesizes its
definition of YYLLOC_DEFAULT.
* data/glr.c: Change all uses of YYLLOC_DEFAULT to parenthesize
their arguments.
* data/lalr1.cc: Likewise.
* data/yacc.cc: Likewise.
Paul Eggert [Mon, 23 Jan 2006 07:59:42 +0000 (07:59 +0000)]
* data/yacc.c (b4_int_type): Use yytype_uint8, etc., so that the
user can override the types.
(short): #undef, to work around a bug in Pike 7.0.
(yytype_uint8, yytype_int8, yytype_uint16, yytype_int16): New types.
(union yyalloc.yyss): Use yytype_int16 rather than short.
All uses changed.
(yysigned_char): Remove.
* src/parse-gram.y (YYTYPE_UINT8, YYTYPE_INT8, YYTYPE_UINT16):
(YYTYPE_INT16): New macros, to test the new facility in yacc.c.
* tests/regression.at (Web2c Actions): Adjust to above changes.
Paul Eggert [Mon, 23 Jan 2006 04:37:09 +0000 (04:37 +0000)]
(check_and_convert_grammar): New function.
(reader): Close the input file even if something went wrong during
parsing. Minor file descriptor leak reported by twlevo.
Paul Eggert [Sun, 22 Jan 2006 08:17:18 +0000 (08:17 +0000)]
* src/assoc.c (assoc_to_string): Use a default: abort (); case
to pacify gcc -Wswitch-default.
* src/scan-gram.l (adjust_location): Use a default: break; case
to pacify gcc -Wswitch-default.
* src/scan-skel.h (skel_get_lineno, skel_get_in, skel_get_out):
(skel_get_leng, skel_get_text, skel_set_lineno, skel_set_in):
(skel_set_out, skel_get_debug, skel_set_debug, skel_lex_destroy):
Move these decls to scan-skel.l, since they don't need to be
visible elsewhere.
* src/scan-skel.l: Accept the above decls.
(skel_lex): New decl, to pacify GCC when unpatched flex 2.5.31
is used.
Paul Eggert [Fri, 20 Jan 2006 22:23:44 +0000 (22:23 +0000)]
* doc/bison.texinfo (Prologue, Rules, Actions, Union Decl, Action Decl):
(Destructor Decl, Parser Function, Pure Calling):
Describe rules for braces inside C code more carefully.
Paul Eggert [Fri, 20 Jan 2006 01:59:30 +0000 (01:59 +0000)]
Fix some porting glitches found by Nelson H. F. Beebe.
* lib/abitset.c (abitset_resize): Rewrite to avoid warnings from
compilers that don't understand that abort () does not return.
* src/state.c (transitions_to): Likewise.
* m4/cxx.m4 (BISON_TEST_FOR_WORKING_CXX_COMPILER): Check
that '#include <cstdlib>' works.
* src/system.h (INT8_MIN, INT16_MIN, INT32_MIN, INT8_MAX):
(INT16_MAX, UINT8_MAX, INT32_MAX, UINT16_MAX, UINT32_MAX):
#undef if ! defined __STDC_VERSION__ || __STDC_VERSION__ < 199901,
for the benefit of some pre-C99 compilers.
Paul Eggert [Fri, 20 Jan 2006 00:08:30 +0000 (00:08 +0000)]
Minor fixups to get 'make maintainer-check' to work.
* configure.ac: Don't use -Wnested-externs, as it's incompatible
with the new verify.h implementation.
* data/c.m4 (b4_yy_symbol_print_generate): YYUSE (yyoutput).
* data/glr.c (YYUSE): Depend on __GNUC__ as well.
* data/yacc.c (YYUSE): Likewise.
* data/lalr1.cc (yysyntax_error_): YYUSE (yystate).
* lib/subpipe.c (end_of_output_subpipe): The args are unused.
* src/parse-gram.y (declaration): Don't pass a string constant
to a function that expects char *, since GCC might complain
about the constant value.
* src/reader.c (symbol_typed_p): Add parens to pacify GCC.
* tests/cxx-type.at (_AT_TEST_GLR_CXXTYPES): #undef yylloc and yylval
before #defining them.
* tests/glr-regression.at
(Incorrectly initialized location for empty right-hand side in GLR):
In yyerror, use the msg arg.
(Corrupted semantic options if user action cuts parse):
(Incorrect lookahead during deterministic GLR):
(Incorrect lookahead during nondeterministic GLR):
Don't name a local var 'index'; it shadows string.h's 'index'.
Paul Eggert [Thu, 19 Jan 2006 06:00:28 +0000 (06:00 +0000)]
Merge with coreutils Makefile.maint.
(CVS_LIST): Use build-aux version if available.
(VERSION_REGEXP): New macro.
(syntax-check-rules): Add sc_no_if_have_config_h,
sc_prohibit_assert_without_use, sc_require_config_h,
sc_useless_cpp_parens.
(sc_obsolete_symbols): Check for O_NDELAY.
(sc_dd_max_sym_length): Track coreutils.
(sc_unmarked_diagnostics): Look in all files, not just *.c.
(sc_useless_cpp_parens): New rule.
(news-date-check): Look for version or today's date.
(changelog-check): Don't require version number near head.
(copyright-check): Use current year instead of hardwiring 2005.
(my-distcheck): Depend on $(release_archive_dir)/$(prev-tgz).
(announcement): Add --gpg-key-ID.
Paul Eggert [Wed, 18 Jan 2006 23:48:29 +0000 (23:48 +0000)]
Avoid undefined behavior that accessed just before the start of an array.
* src/reader.c (packgram): Prepend a new sentinel before ritem.
* src/lalr.c (build_relations): Rely on new sentinel.
* src/gram.c (gram_free): Adjust to new sentinel.
Joel E. Denny [Thu, 12 Jan 2006 01:43:03 +0000 (01:43 +0000)]
* data/glr.c (yyGLRStateSet): Rename yylookaheadStatuses to
yylookaheadNeeds. All uses updated.
(yysplitStack): Rename local yynewLookaheadStatuses to
yynewLookaheadNeeds.
* data/glr-regression.at (Incorrect lookahead during nondeterministic
GLR): In comments, change `lookahead status' to `lookahead need'.
Joel E. Denny [Wed, 11 Jan 2006 22:39:27 +0000 (22:39 +0000)]
* doc/bison.texinfo: Fix some typos.
(GLR Semantic Actions): New subsection discussing special
considerations because GLR semantic actions might be deferred.
(Actions): Mention look-ahead usage of yylval.
(Actions and Locations): Mention look-ahead usage of yylloc.
(Special Features for Use in Actions): Add YYEOF entry and mention it
in the yychar entry.
In the yychar entry, remove mention of the local yychar case (pure
parser) since this is irrelevant information when writing semantic
actions and since it's already discussed in `Bison Symbols' where
yychar is otherwise described as an external variable.
In the yychar entry, don't call it the `current' look-ahead since it
isn't when semantic actions are deferred.
In the yychar and yyclearin entries, add note about deferred semantic
actions.
Add yylloc and yylval entries discussing look-ahead usage.
(Look-Ahead Tokens): When discussing yychar, don't call it the
`current' look-ahead, and do mention yylval and yylloc.
(Error Recovery): Cross-reference `Action Features' when mentioning
yyclearin.
(Bison Symbols): In the yychar entry, don't call it the `current'
look-ahead.
In the yylloc and yylval entries, mention look-ahead usage.
Joel E. Denny [Fri, 6 Jan 2006 20:48:33 +0000 (20:48 +0000)]
* data/glr.c (yyGLRStateSet): Add yybool* yylookaheadStatuses member to
use during nondeterministic operation to track which stacks have
actually needed the current lookahead.
(yyinitStateSet, yyfreeStateSet, yyremoveDeletes, yysplitStack):
Allocate, deallocate, resize, and otherwise shuffle space for
yylookaheadStatuses in parallel with yystates member of yyGLRStateSet.
(yysplitStack, yyprocessOneStack, yyparse): Set lookahead status
appropriately during nondeterministic operation.
(yySemanticOption): Add int yyrawchar, YYSTYPE yyval, and YYLTYPE yyloc
members to store the current lookahead to be used by the deferred
user action.
(yyaddDeferredAction): Add size_t yyk parameter specifying the stack
from which the RHS is taken. Set the lookahead members of the new
yySemanticOption according to the lookahead status for stack yyk.
(yyglrShiftDefer, yyglrReduce): Pass yyk parameter on to
yyaddDeferredAction.
(yyresolveAction): Set yychar, yylval, and yylloc to the lookahead
members of yySemanticOption before invoking yyuserAction, and then set
them back to their current values afterward.
(yyparse): Set yychar = YYEMPTY where yytoken = YYEMPTY.
(yyreportAmbiguity): Add /*ARGSUSED*/ to pacify lint.
* tests/glr-regression.at: Remove `.' from the ends of recent test case
titles for consistency.
(Leaked merged semantic value if user action cuts parse): In order to
suppress lint warnings, use arguments in merge function, and assign
char value < 128 in main.
(Incorrect lookahead during deterministic GLR): New test case.
(Incorrect lookahead during nondeterministic GLR): New test case.
Joel E. Denny [Fri, 6 Jan 2006 20:09:31 +0000 (20:09 +0000)]
* data/c.m4 (b4_yy_symbol_print_generate): In yy_symbol_print, accept
!yyvaluep as signal that no semantic value is available to print.
* data/glr.c (yydestroyGLRState): If state is not resolved, don't try
to print a semantic value.
Joel E. Denny [Thu, 5 Jan 2006 21:07:54 +0000 (21:07 +0000)]
* data/glr.c (yyresolveValue): When merging semantic options, if at
least one user action succeeds but a later one cuts the parse, then
destroy the semantic value before returning rather than leaking it.
(yyresolveStates): If a user action cuts the parse and thus
yyresolveValue fails, ignore the (unset) semantic value rather than
corrupting the yyGLRState, and empty the semantic options list since
the user actions should have called all necessary destructors.
Simplify code with YYCHK.
* tests/glr-regression.at (Corrupted semantic options if user action
cuts parse): New test case.
(Undesirable destructors if user action cuts parse): New test case.
Before applying any of this patch, this test case never actually failed
for me... but only because the corrupted semantic options usually
masked this bug.
(Leaked merged semantic value if user action cuts parse): New test
case.
Paul Eggert [Wed, 4 Jan 2006 23:35:43 +0000 (23:35 +0000)]
* data/c.m4 (b4_c_modern): New macro, with a new provision for _MSC_VER.
(b4_c_function_def): Use it.
* data/yacc.c (YYMODERN_C): Remove. All uses replaced by
b4_c_modern.
(yystrlen, yystpcpy, yyparse): Use b4_c_function... macros rather
than rolling our own.
Akim Demaille [Wed, 4 Jan 2006 09:18:37 +0000 (09:18 +0000)]
Also warn about non-used mid-rule values.
* src/symlist.h, src/symlist.c (symbol_list): Add a mid_rule
member.
(symbol_list_new): Adjust.
* src/reader.c (symbol_typed_p): New.
(grammar_rule_check): Use it.
(grammar_midrule_action): Bind a mid-rule LHS to its rule.
Check its rule.
* tests/input.at (AT_CHECK_UNUSED_VALUES): New.
Use it.
* tests/actions.at (Exotic Dollars): Adjust.
Akim Demaille [Wed, 4 Jan 2006 08:32:46 +0000 (08:32 +0000)]
* src/reader.c (grammar_midrule_action): If $$ is set in a
mid-rule, move the `used' bit to its lhs.
* tests/input.at (Unused values): New.
* tests/actions.at (Exotic Dollars): Adjust: exp is not typed.
Paul Eggert [Tue, 3 Jan 2006 22:35:45 +0000 (22:35 +0000)]
* doc/bison.texinfo (Bison Options): Say more accurately what
--yacc does.
* src/parse-gram.y (rules_or_grammar_declaration): Don't complain
about declarations in the grammar when in Yacc mode, as POSIX does
not require a diagnostic when the grammar uses extensions.
Paul Eggert [Tue, 3 Jan 2006 21:31:57 +0000 (21:31 +0000)]
Warn about dubious constructions like "%token T T".
* src/symtab.h (struct symbol.declared): New member.
* src/symtab.c (symbol_new): Initialize it to false.
(symbol_class_set): New arg DECLARING, specifying whether
this is a declaration that we want to warn about, if there
is more than one of them. All uses changed.
Paul Eggert [Tue, 3 Jan 2006 20:25:54 +0000 (20:25 +0000)]
* data/glr.c, data/glr.cc, data/lalr1.cc, data/yacc.c:
Allow multiple %union directives, whose contents concatenate.
* src/parse-gram.y (grammar_declaration): Likewise.
Use muscle_code_grow, so that we don't need stype_line any more.
All uses changed.