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.
!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.
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.
(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.
* 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.
--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.
* 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.
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.
* 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.
(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.
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.
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.
(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.
* 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++.
(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.
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.
* 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.
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.
