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.
Akim Demaille [Tue, 3 Jan 2006 09:06:22 +0000 (09:06 +0000)]
Have glr.cc pass (some of) the calc.at tests.
* data/glr.cc (b4_parse_param_orig): New.
(b4_parse_param): Improve its definition, and bound it more
clearly in the skeleton.
(b4_epilogue): Append, instead of prepending, in order to keep
#line consistency.
Simplify the generation of auxiliary functions: locations and
purity are mandated.
(b4_global_tokens_and_yystype): Honor it.
* data/location.cc (c++.m4): Don't include it.
* tests/local.at (_AT_BISON_OPTION_PUSHDEFS): Define AT_GLR_CC_IF
and AT_SKEL_CC_IF.
* tests/calc.at (AT_CHECK_CALC): Rely on AT_SKEL_CC_IF instead of
AT_LALR1_CC_IF.
Be sure to initialize the first position's filename.
(AT_CHECK_CALC_LALR1_CC): Add %location and %defines, they are
mandated anyway.
(AT_CHECK_CALC_GLR_CC): New.
Use it to exercise glr.cc as a lalr1.cc drop-in replacement.
Akim Demaille [Mon, 2 Jan 2006 16:26:17 +0000 (16:26 +0000)]
* src/output.c (output_skeleton): Don't hard wire the inclusion of
c.m4.
* data/c++.m4, data/glr.c, data/yacc.c: Include c.m4.
* data/glr.cc: Do not include stack.hh.
Akim Demaille [Mon, 2 Jan 2006 15:28:03 +0000 (15:28 +0000)]
* data/glr.c: Reformat whitespace with tabs.
(b4_lpure_formals): Remove this unused m4 macro.
* tests/cxx-type.at: Reformat whitespace with tabs.
(_AT_TEST_GLR_CXXTYPES): In union Node, rename node_info to nodeInfo
since it's a member. Rename type to isNterm for clarity.
Paul Eggert [Wed, 28 Dec 2005 08:45:47 +0000 (08:45 +0000)]
* src/location.h (boundary): Note that a line or column equal
to INT_MAX indicates an overflow.
* src/scan-gram.l: Include verify.h. Don't include get-errno.h.
(rule_length_overflow, increment_rule_length, add_column_width):
New functions.
(<INITIAL>{id}, <SC_ESCAPED_STRING>"\"", <SC_ESCAPED_CHARACTER>"'"):
(<SC_BRACED_CODE>"}"):
Use increment_rule_length rather than incrementing it by hand.
(adjust_location, handle_syncline): Diagnose overflow.
(handle_action_dollar, handle_action_at):
Fix bug with monstrosities like $-2147483648.
Remove now-unnecessary checks.
(scan_integer): Verify assumptions and remove now-unnecessary checks.
(convert_ucn_to_byte): Verify assumptions.
(handle_syncline): New arg LOC. All callers changed.
Don't store through a value derived from char const * pointer.
Akim Demaille [Tue, 27 Dec 2005 17:50:00 +0000 (17:50 +0000)]
* src/reader.c (grammar_current_rule_check): Also check that $$
is used.
Take the rule to check as argument, hence rename as...
(grammar_rule_check): this.
* src/reader.h, src/reader.c (grammar_rule_begin, grammar_rule_end):
Rename as...
(grammar_rule_begin, grammar_rule_end): these, for consistency.
(grammar_midrule_action, grammar_symbol_append): Now static.
* tests/torture.at (input): Don't rely on the default action
being always performed.
* tests/calc.at: "Set" $$ even when the action is "cut" with
YYERROR or other.
* tests/actions.at (Exotic Dollars): Instead of using unused
values, check that the warning is issued.
Akim Demaille [Thu, 22 Dec 2005 13:01:50 +0000 (13:01 +0000)]
* data/lalr1.cc, data/yacc.c, data/glr.c, data/c.m4
(b4_yysymprint_generate): Rename as...
(b4_yy_symbol_print_generate): this.
Generate yy_symbol_print instead of yysymprint.
Generate also yy_symbol_value_print, and use it.
Paul Eggert [Thu, 22 Dec 2005 00:24:40 +0000 (00:24 +0000)]
* NEWS: Reword %destructor vs YYABORT etc.
* data/glr.c: Use American spacing, for consistency.
* data/glr.cc: Likewise.
* data/lalr1.cc: Likewise.
* data/yacc.c: Likewise.
* data/yacc.c: Reformat comments slightly.
* doc/bison.texinfo: Replace "non-" with "non" when that makes sense,
for consistency. Fix some spelling errors and reword recently-included
text slightly.
* tests/cxx-type.at: Cast results of malloc, for C++.
Akim Demaille [Wed, 21 Dec 2005 15:45:17 +0000 (15:45 +0000)]
* tests/cxx-type.at: Construct a tree, count the parents of shared
nodes, and free each node once and only once. Previously, the memory
for semantic values was leaked instead.
Akim Demaille [Wed, 21 Dec 2005 15:33:13 +0000 (15:33 +0000)]
* data/glr.c (struct yyGLRStack): If pure, add yyval and yyloc members.
(yylval, yylloc): If pure, #define to yystackp->yyval and
yystackp->yyloc similar to yychar and yynerrs.
(yyparse): If pure, remove local yylval and yylloc. Add local
yystackp to accommodate pure definitions of yylval and yylloc.
(b4_lex_param, b4_lyyerror_args, b4_lpure_args): If pure, change
yylvalp and yyllocp to &yylval and &yylloc.
(nerrs, char, lval, lloc): If pure, add #define's for b4_prefix[]
namespace. Previously, nerrs and char were missing, but lval and lloc
weren't necessary.
(yyprocessOneStack, yyreportSyntaxError, yyrecoverSyntaxError): Remove
yylvalp and yyllocp parameters since, if pure, these are now always
accessible through yystackp. If not pure, they are still accessible
globally.
* data/glr.c, data/yacc.c (YYLLOC_DEFAULT): Change `if (N)' to
`if (YYID (N))' to pacify lint.
Akim Demaille [Wed, 21 Dec 2005 15:28:30 +0000 (15:28 +0000)]
YYACCEPT, YYERROR, and YYABORT, as user actions, should not
destroy the RHS symbols of a rule.
* data/yacc.c (yylen): Initialize to 0.
Keep its value to the number of items to possibly shift.
In particular, a regular successful parse that ends on YYFINAL by
a (internal) YYACCEPT must not have yylen != 0.
(yyerrorlab, yyreturn): Pop the RHS.
Reorder a bit to emphasize the `shifting' bits of code.
(YYPOPSTACK): Now accept a number of items to pop.
* data/lalr1.cc: Likewise.
* data/glr.c: Formatting changes.
Use goto instead of fall through.
* doc/bison.texinfo (Destructor Decl): Complete.
* Makefile.am: DJGPP specific files added to EXTRA_DIST.
* djgpp/Makefile.maint: Fix PACKAGE variable computation.
* djgpp/config.bat: Replace every occurence of the file name
scan-gram-c.c with c-scan-gram.c. The same for scan-skel-c.c with
c-scan-skel.c to conform with the 8.3 file name restriction on MSDOS.
* djgpp/config.sed: Replace every occurence of the file name
scan-gram-c.c with c-scan-gram.c. The same for scan-skel-c.c with
c-scan-skel.c to conform with the 8.3 file name restriction on MSDOS.
* djgpp/djunpack.bat: DJGPP specific file.
* djgpp/fnchange.lst: DJGPP specific file.
* djgpp/README.in: Add new information about how to unpack the bison
source on MSDOS and other systems which have 8.3 file name restrictions
using djunpack.bat and fnchange.lst.
Add new information about how to unpack the bison source on
MSDOS and other systems which have 8.3 file name restrictions
using djunpack.bat and fnchange.lst.
Paul Eggert [Mon, 12 Dec 2005 21:04:39 +0000 (21:04 +0000)]
* data/glr.c: Reorder typedef declarations for structs to match order
of struct declarations.
Rename yystack everywhere to yystackp except in yyparse where it's not
a pointer.
(yyglrShift): Change parameter YYSTYPE yysval to YYSTYPE* yyvalp for
consistency.
(yyis_table_ninf): Change 0 to YYID (0) to pacify lint.
(yyreportSyntaxError): Add /*ARGSUSED*/ to pacify lint.
(yyparse): Change while (yytrue) to while ( YYID (yytrue)) to pacify
lint.
Paul Eggert [Fri, 9 Dec 2005 23:51:26 +0000 (23:51 +0000)]
Work around portability problem on Solaris 10: flex-generated
files include <stdio.h> before <config.h>, which messes up
because the latter defines __EXTENSIONS__. Address the problem
by creating two new little files that include <config.h> first,
then include the flex-generated files. Rewrite everyone else
to include <config.h> first, as well.
* lib/timevar.c: Always include "config.h".
* src/Makefile.am (bison_SOURCES): Replace scan-gram.l with
scan-gram-c.c, and scan-skel.l with scan-skel-c.c.
(EXTRA_bison_SOURCES): New macro.
* src/scan-gram-c.c, src/scan-skel-c.c: New files.
* src/system.h: Don't include config.h.
* src/LR0.c: Include <config.h> first.
* src/assoc.c: Likewise.
* src/closure.c: Likewise.
* src/complain.c: Likewise.
* src/conflicts.c: Likewise.
* src/derives.c: Likewise.
* src/files.c: Likewise.
* src/getargs.c: Likewise.
* src/gram.c: Likewise.
* src/lalr.c: Likewise.
* src/location.c: Likewise.
* src/main.c: Likewise.
* src/muscle_tab.c: Likewise.
* src/nullable.c: Likewise.
* src/output.c: Likewise.
* src/parse-gram.y: Likewise.
* src/print.c: Likewise.
* src/print_graph.c: Likewise.
* src/reader.c: Likewise.
* src/reduce.c: Likewise.
* src/relation.c: Likewise.
* src/state.c: Likewise.
* src/symlist.c: Likewise.
* src/symtab.c: Likewise.
* src/tables.c: Likewise.
* src/uniqstr.c: Likewise.
* src/vcg.c: Likewise.
Paul Eggert [Fri, 9 Dec 2005 22:14:36 +0000 (22:14 +0000)]
Cleanups so that Bison-generated parsers have less lint.
* data/c.m4 (b4_yydestruct_generate, b4_yysymprint_generate):
Prepend /*ARGSUSED*/, for lint's sake.
* data/glr.c (YYUSE): Properly parenthesize, and use an alternate
definition if 'lint' is defined.
(YYID): New macro (or function, if lint).
All uses of /*CONSTCOND*/0 replaced by YYID(0).
* data/yacc.c: Likewise.
* data/glr.c (yyuserAction, yyuserMerge, yy_reduce_print):
(yyrecoverSyntaxError): Prepend /*ARGSUSED*/.
* data/glr.cc (YYLLOC_DEFAULT): Omit /*CONSTCOND*/ since this code
is C++ only.
* data/lalr1.cc (YYUSE): Just use a cast, since this code is C++ only.
* data/yacc.c (YYSTACK_FREE) [defined YYSTACK_ALLOC]:
Use YYID(0) rather than 0, for lint.
(yystrlen): Rewrite to avoid lint warning about ptrdiff_t overflow.
(yysyntax_error): Rewrite to avoid lint warnings about parenthesization.
Paul Eggert [Tue, 6 Dec 2005 19:38:25 +0000 (19:38 +0000)]
* data/glr.c (yyprocessOneStack): Synchronize the shift for all
stacks, and iterate another stack in order to call user
destructors.
* tests/glr-regression.at (No users destructors if stack 0 deleted):
New test case.
(Duplicated user destructor for lookahead): This test now is expected
to succeed.
Paul Eggert [Thu, 1 Dec 2005 20:03:55 +0000 (20:03 +0000)]
* data/yacc.c: Say "parser skeleton" rather than "file", since
it's no longer just a file.
* data/glr.c: Grant a special exception for C GLR parsers, that
reads like the already-existing exception for C LALR(1) parsers.
* data/glr.cc: Likewise.
* data/lalr1.cc: Likewise.
* data/location.cc: Likewise.
* data/yacc.c: Reword the "written by" statement to clarify that
it was the parser skeleton, not the entire output file.
* data/glr.c: Written by Paul Hilfinger.
* data/glr.cc: Written by Akim Demaille.
* data/lalr1.cc: Likewise.
Paul Eggert [Fri, 18 Nov 2005 19:37:13 +0000 (19:37 +0000)]
* data/yacc.c (yy_reduce_print, YY_REDUCE_PRINT):
Fix typos in previous change that broke 'make check'.
YY_REDUCE_PRINT cannot be a pseudo-varargs macro; that isn't
supported in C.
* tests/calc.at (_AT_CHECK_CALC,_AT_CHECK_CALC_ERROR):
Don't check NUM-STDERR-LINES, since the output format is fluctuating.
We can revert this once things settle down.
Paul Eggert [Fri, 18 Nov 2005 18:16:44 +0000 (18:16 +0000)]
* src/conflicts.c (conflicts_print): Don't print file name twice
when %expect fails because there were no conflicts.
* doc/bison.texinfo (Expect Decl): Tighten up wording in previous
change.
* tests/conflicts.at (%expect not enough, %expect too much):
(%expect with reduce conflicts): Adjust to new behavior.
Akim Demaille [Wed, 16 Nov 2005 14:20:48 +0000 (14:20 +0000)]
Generalize the display of semantic values and locations in traces.
* data/glr.c (yy_reduce_print): Fix indices (again).
* data/c++.m4 (b4_rhs_value, b4_rhs_location): Don't expect
literal integers.
* data/lalr1.cc (yyreduce_print): Rename as...
(yy_reduce_print): this.
Display values and locations.
* data/yacc.c (yy_reduce_print): Likewise.
(YY_REDUCE_PRINT): Adjust to pass the required arguments.
(yysymprint): Move higher to be visible from yy_reduce_print).
(yyparse): Adjust.
* tests/calc.at: Adjust the expected length of the traces.
Akim Demaille [Mon, 14 Nov 2005 17:20:28 +0000 (17:20 +0000)]
* data/glr.c (yy_reduce_print): The loop was quite wrong: type are
from 1 to N, while values and location start at 0.
(b4_rhs_location, b4_rhs_value): Add parens around $1 and $2.
Akim Demaille [Mon, 14 Nov 2005 15:18:34 +0000 (15:18 +0000)]
"Use" parse parameters.
* data/c.m4 (b4_parse_param_for, b4_parse_param_use): New.
* data/glr.c, data/glr.cc: Use them.
* data/glr.c (YYUSE): Have a C++ definition that supports
non-pointer types.
Akim Demaille [Mon, 14 Nov 2005 08:09:00 +0000 (08:09 +0000)]
Have glr.c include its header file when created.
* data/glr.c (b4_shared_declarations): New.
Output them verbatim in the parser if !%defines, otherwise
output then in the header file, and include it instead.
Akim Demaille [Sat, 12 Nov 2005 14:13:03 +0000 (14:13 +0000)]
Let position and location be PODs.
* data/location.cc (position::initialize, location::initialize): New.
(position::position, location::location): Define only if
b4_location_constructors is defined.
* data/lalr1.cc (b4_location_constructors): Define it for backward
compatibility.
* doc/bison.texinfo (Initial Action Decl): Use initialize.
Akim Demaille [Fri, 11 Nov 2005 10:36:24 +0000 (10:36 +0000)]
When yydebug, report semantic and location values for reductions.
* data/glr.c (yy_reduce_print): Report the semantic values and the
locations.
(YY_REDUCE_PRINT): Adjust.
(yyglrReduce): Use them.
(b4_rhs_value, b4_rhs_location): Remove m4_eval invocations.
* data/c.m4 (b4_yysymprint_generate): Specify the const arguments.
* tests/calc.at (_AT_CHECK_CALC_ERROR): Remove the reduction
traces.
Akim Demaille [Wed, 9 Nov 2005 15:48:05 +0000 (15:48 +0000)]
In some (weird) cases, the final state number is incorrect.
Reported by Alexandre Duret-Lutz.
* src/LR0.c (state_list_append): Remove the computation of
final_state.
(save_reductions): Do it here.
(get_state): Alpha conversion.
(generate_states): Use a for loop.
* src/gram.h (item_number_is_rule_number)
(item_number_is_symbol_number): New.
* src/state.c: Use assert.
* src/system.h: Include assert.h.
* tests/sets.at (Accept): New.
Paul Eggert [Mon, 31 Oct 2005 00:11:48 +0000 (00:11 +0000)]
* bootstrap (cleanup_gnulib): New function. Use it to clean up
gnulib when interrupted. This fixes some race conditions and
works around some portability problems (one noted by Paul
Hilfinger).
Akim Demaille [Thu, 13 Oct 2005 10:13:24 +0000 (10:13 +0000)]
* src/scan-skel.l: Output the base name parts of the parser and
header file names.
* tests/output.at (AT_CHECK_OUTPUT): Support subdirectorioes, and
additional checks.
Use this to exercise C++ outputs in subdirs.
Reported by Oleg Smolsky.
Paul Eggert [Thu, 13 Oct 2005 06:23:54 +0000 (06:23 +0000)]
* data/c.m4 (b4_c_function_def): Look at __C99_FUNC__, not at
__STDC_VERSION__, as IBM cc 7.0 doesn't define the latter either.
Problem reported by John P. Hartmann.
* data/yacc.c (YYMODERN_C): Likewise. Don't define if the user has
already defined it.
Paul Eggert [Tue, 11 Oct 2005 05:36:04 +0000 (05:36 +0000)]
* data/c.m4 (b4_c_function_def): Look at __STDC_VERSION__ as well
as __STDC__, as IBM cc defines the former but not the latter.
* data/yacc.c (YYMODERN_C): New macro, which also looks at
__STDC_VERSION__. Use it everywhere instead of looking at
__STDC__ and __cplusplus.
Paul Eggert [Tue, 11 Oct 2005 05:06:16 +0000 (05:06 +0000)]
Work around portability problems with Visual Age C compiler
(xlc and xlC_r) reported by John P. Hartmann.
* data/location.cc (initial_column, initial_line): Remove.
All uses replaced by 0 and 1.
* src/scan-gram.l (gram_wrap): Redefine to avoid bug in flex 2.5.31
that xlc complains about.
* src/scan-skel.l (skel_wrap): Likewise.
Paul Eggert [Thu, 6 Oct 2005 07:17:21 +0000 (07:17 +0000)]
* data/c.m4 (yydestruct, yysymprint):
Use YYUSE instead of casting to void.
* data/glr.c (YYUSE): New macro.
(yyuserMerge, yyreportAmbiguity, yyreportSyntaxError):
Use it instead of rolling our own.
(YYLLOC_DEFAULT, YYCHK, YYDPRINTF, YY_SYMBOL_PRINT, YY_REDUCE_PRINT):
(YYCHK1):
Use /*CONSTCOND*/ to suppress lint warnings.
* data/lalr1.cc (YYLLOC_DEFAULT, YY_SYMBOL_PRINT, YY_REDUCE_PRINT):
(YY_STACK_PRINT): Use 'false' not '0'.
(YYUSE): New macro.
(yysymprint_, yydestruct_): Use it instead of rolling our own.
* data/yacc.c (YYUSE): New macro.
(YYCOPY, YYSTACK_RELOCATE, YYBACKUP, YYLLOC_DEFAULT):
(YYDPRINTF, YY_SYMBOL_PRINT, YY_STACK_PRINT, YY_REDUCE_PRINT):
(yyerrorlab): Use /*CONSTCOND*/ to suppress lint warnings.
Paul Eggert [Wed, 5 Oct 2005 06:39:08 +0000 (06:39 +0000)]
Undo the parts of the unlocked-I/O change that substituted
putc or puts for printf. This might hurt performance a bit,
but some people prefer the printf style.
* data/c.m4 (yysymprint): Prefer printf to puts and putc.
* data/glr.c (YYFPUTC, YYFPUTS, YYDPUTS): Remove.
All uses replaced by YYFPRINTF and YYDPRINTF.
* data/yacc.c: Likewise.
* lib/bitset.c (bitset_print): Likewise.
* lib/bitsetv.c (bitsetv_dump, debug-bitsetv): Prefer printf to
putc and puts.
* lib/lbitset.c (debug_lbitset): Likewise.
* src/closure.c (print_firsts, print_fderives): Likewise.
* src/gram.c (grammar_dump): Likewise.
* src/lalr.c (look_ahead_tokens_print): Likewise.
* src/output.c (escaped_output): Likewise.
(user_actions_output): Break apart two printfs.
* src/parse-gram.y (%printer): Prefer printf to putc and puts.
* src/reduce.c (reduce_print): Likewise.
* src/state.c (state_rule_look_ahead_tokens_print): Likewise.
* src/system.h: Include unlocked-io.h rathe than stdio.h.
Paul Eggert [Wed, 5 Oct 2005 06:05:22 +0000 (06:05 +0000)]
* data/glr.c (yyuserMerge, yyreportAmbiguity, yyreportSyntaxError):
Use assignments rather than casts-to-void to suppress
unused-variable warnings. This pacifies 'lint'.
* data/lalr1.cc (yysymprint_, yydestruct_): Use a call to suppress
unused-variable warnings.
Paul Eggert [Sun, 2 Oct 2005 21:24:12 +0000 (21:24 +0000)]
Use unlocked I/O for a minor performance improvement on hosts like
GNU/Linux and Solaris that support unlocked I/O. The basic idea
is to use the gnlib unlocked-io module, and to prefer putc and
puts to printf when either will work (since the latter doesn't
come in an unlocked flavor).
* bootstrap (gnulib_modules): Add unlocked-io.
* data/c.m4 (yysymprint): Prefer puts and putc to printf.
* data/glr.c (YYFPUTC, YYFPUTS, YYDPUTS): New macros.
Prefer them to YYFPRINTF and YYDPRINTF if either will do,
and similarly for puts and putc and printf.
* data/yacc.c: Likewise.
* lib/bitset.c (bitset_print): Likewise.
* lib/bitset.h [USE_UNLOCKED_IO]: Include unlocked-io.h.
* lib/bitsetv.c (bitsetv_dump, debug-bitsetv): Prefer putc and puts
to printf.
* lib/lbitset.c (debug_lbitset): Likewise.
* src/closure.c (print_firsts, print_fderives): Likewise.
* src/gram.c (grammar_dump): Likewise.
* src/lalr.c (look_ahead_tokens_print): Likewise.
* src/output.c (escaped_output): Likewise.
(user_actions_output): Coalesce two printfs.
* src/parse-gram.h (%printer): Prefer putc and puts to printf.
* src/reduce.c (reduce_print): Likewise.
* src/state.c (state_rule_look_ahead_tokens_print): Likewise.
* src/system.h: Include unlocked-io.h rathe than stdio.h.