-m4_divert(-1) -*- C -*-
+ -*- C -*-
# GLR skeleton for Bison
-# Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
-# This program is free software; you can redistribute it and/or modify
+# Copyright (C) 2002-2011 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
+# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
-
+#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
-
+#
# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-# 02110-1301 USA
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
m4_include(b4_pkgdatadir/[c.m4])
## Pure/impure interfaces. ##
## ------------------------ ##
+b4_define_flag_if([pure])
+# If glr.cc is including this file and thus has already set b4_pure_flag, don't
+# change the value of b4_pure_flag, and don't record a use of api.pure.
+m4_ifndef([b4_pure_flag],
+[b4_percent_define_default([[api.pure]], [[false]])
+ m4_define([b4_pure_flag],
+ [b4_percent_define_flag_if([[api.pure]], [[1]], [[0]])])])
# b4_user_formals
# ---------------
# Yes, this is quite ugly...
m4_define([b4_lex_param],
m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl
-b4_location_if([, [[YYLTYPE *], [&yylloc]]])])dnl
+b4_locations_if([, [[YYLTYPE *], [&yylloc]]])])dnl
m4_ifdef([b4_lex_param], [, ]b4_lex_param)))
# Optional effective arguments passed to yyerror: user args plus yylloc, and
# a trailing comma.
m4_define([b4_yyerror_args],
-[b4_pure_if([b4_location_if([yylocp, ])])dnl
+[b4_pure_if([b4_locations_if([yylocp, ])])dnl
m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
# b4_lyyerror_args
# ----------------
-# Same as above, but on the look-ahead, hence &yylloc instead of yylocp.
+# Same as above, but on the lookahead, hence &yylloc instead of yylocp.
m4_define([b4_lyyerror_args],
-[b4_pure_if([b4_location_if([&yylloc, ])])dnl
+[b4_pure_if([b4_locations_if([&yylloc, ])])dnl
m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
# ------------
# Same as b4_yyerror_args, but with a leading comma.
m4_define([b4_pure_args],
-[b4_pure_if([b4_location_if([, yylocp])])[]b4_user_args])
+[b4_pure_if([b4_locations_if([, yylocp])])[]b4_user_args])
# b4_lpure_args
# -------------
-# Same as above, but on the look-ahead, hence &yylloc instead of yylocp.
+# Same as above, but on the lookahead, hence &yylloc instead of yylocp.
m4_define([b4_lpure_args],
-[b4_pure_if([b4_location_if([, &yylloc])])[]b4_user_args])
+[b4_pure_if([b4_locations_if([, &yylloc])])[]b4_user_args])
# b4_pure_formals
# ---------------
# Arguments passed to yyerror: user formals plus yylocp.
m4_define([b4_pure_formals],
-[b4_pure_if([b4_location_if([, YYLTYPE *yylocp])])[]b4_user_formals])
+[b4_pure_if([b4_locations_if([, YYLTYPE *yylocp])])[]b4_user_formals])
## ----------------- ##
# --------------------
# Expansion of $<TYPE>$.
m4_define([b4_lhs_value],
-[((*yyvalp)[]m4_ifval([$1], [.$1]))])
+[b4_symbol_value([(*yyvalp)], [$1])])
+
+
+# b4_rhs_data(RULE-LENGTH, NUM)
+# -----------------------------
+# Expand to the semantic stack place that contains value and location
+# of symbol number NUM in a rule of length RULE-LENGTH.
+m4_define([b4_rhs_data],
+[((yyGLRStackItem const *)yyvsp)@{YYFILL (b4_subtract([$2], [$1]))@}.yystate])
# b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
# Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
# symbols on RHS.
m4_define([b4_rhs_value],
-[(((yyGLRStackItem const *)yyvsp)@{YYFILL (($2) - ($1))@}.yystate.yysemantics.yysval[]m4_ifval([$3], [.$3]))])
+[b4_symbol_value([b4_rhs_data([$1], [$2]).yysemantics.yysval], [$3])])
# Expansion of @NUM, where the current rule has RULE-LENGTH symbols
# on RHS.
m4_define([b4_rhs_location],
-[(((yyGLRStackItem const *)yyvsp)@{YYFILL (($2) - ($1))@}.yystate.yyloc)])
+[(b4_rhs_data([$1], [$2]).yyloc)])
# We do want M4 expansion after # for CPP macros.
m4_changecom()
-m4_divert(0)dnl
-@output @output_parser_name@
-b4_copyright([Skeleton parser for GLR parsing with Bison],
- [2002, 2003, 2004, 2005, 2006])
+m4_divert_push(0)dnl
+@output(b4_parser_file_name@)@
+b4_copyright([Skeleton implementation for Bison GLR parsers in C],
+ [2002-2011])
[
-/* This is the parser code for GLR (Generalized LR) parser. */
+/* C GLR parser skeleton written by Paul Hilfinger. */
]b4_identification
-m4_if(b4_prefix[], [yy], [],
+b4_percent_code_get([[top]])[]dnl
+m4_if(b4_prefix, [yy], [],
[/* Substitute the variable and function names. */
#define yyparse b4_prefix[]parse
#define yylex b4_prefix[]lex
#define yychar b4_prefix[]char
#define yydebug b4_prefix[]debug
#define yynerrs b4_prefix[]nerrs
-#define yylloc b4_prefix[]lloc])
+#define yylloc b4_prefix[]lloc])[
+
+/* Copy the first part of user declarations. */
+]b4_user_pre_prologue
dnl # b4_shared_declarations
dnl # ----------------------
dnl # Declaration that might either go into the header (if --defines)
dnl # or open coded in the parser body.
m4_define([b4_shared_declarations],
-[b4_token_enums(b4_tokens)[
+[b4_percent_code_get([[requires]])[]dnl
-/* Copy the first part of user declarations. */
-]b4_pre_prologue[
+b4_token_enums(b4_tokens)
-#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
+[#ifndef YYSTYPE
]m4_ifdef([b4_stype],
-[typedef union m4_bregexp(b4_stype, [^{], [YYSTYPE ])
-b4_stype
-/* Line __line__ of glr.c. */
-b4_syncline([@oline@], [@ofile@])
- YYSTYPE;],
-[typedef int YYSTYPE;])[
-# define YYSTYPE_IS_DECLARED 1
-# define YYSTYPE_IS_TRIVIAL 1
+[[typedef union ]b4_union_name[
+{
+]b4_user_stype[
+} YYSTYPE;
+# define YYSTYPE_IS_TRIVIAL 1]],
+[m4_if(b4_tag_seen_flag, 0,
+[[typedef int YYSTYPE;
+# define YYSTYPE_IS_TRIVIAL 1]])])[
#endif
#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
typedef struct YYLTYPE
{
-]b4_location_if([
+]b4_locations_if([
int first_line;
int first_column;
int last_line;
# define YYLTYPE_IS_DECLARED 1
# define YYLTYPE_IS_TRIVIAL 1
#endif
-]])
-m4_if(b4_defines_flag, 0,
- [b4_shared_declarations],
- [#include @output_header_name@])[
+]b4_percent_code_get([[provides]])[]dnl
+])
+
+b4_defines_if([[#include "@basename(]b4_spec_defines_file[@)"]],
+ [b4_shared_declarations])[
/* Enabling traces. */
#ifndef YYDEBUG
-# define YYDEBUG ]b4_debug[
+# define YYDEBUG ]b4_parse_trace_if([1], [0])[
#endif
/* Enabling verbose error messages. */
# undef YYERROR_VERBOSE
# define YYERROR_VERBOSE 1
#else
-# define YYERROR_VERBOSE ]b4_error_verbose[
+# define YYERROR_VERBOSE ]b4_error_verbose_if([1], [0])[
#endif
/* Enabling the token table. */
static YYSTYPE yyval_default;
/* Copy the second part of user declarations. */
-]b4_post_prologue[
+]b4_user_post_prologue
+b4_percent_code_get[]dnl
-]/* Line __line__ of glr.c. */
-b4_syncline([@oline@], [@ofile@])
-[
-#include <stdio.h>
+[#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <stdarg.h>
#ifndef YY_
-# if YYENABLE_NLS
+# if defined YYENABLE_NLS && YYENABLE_NLS
# if ENABLE_NLS
# include <libintl.h> /* INFRINGES ON USER NAME SPACE */
# define YY_(msgid) dgettext ("bison-runtime", msgid)
#ifndef __attribute__
/* This feature is available in gcc versions 2.5 and later. */
# if (! defined __GNUC__ || __GNUC__ < 2 \
- || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__)
+ || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) \
+ || (defined __STRICT_ANSI__ && __STRICT_ANSI__))
# define __attribute__(Spec) /* empty */
# endif
#endif
-]b4_location_if([#define YYOPTIONAL_LOC(Name) Name],[
+]b4_locations_if([#define YYOPTIONAL_LOC(Name) Name],[
#ifdef __cplusplus
# define YYOPTIONAL_LOC(Name) /* empty */
#else
#define YYMAXUTOK ]b4_user_token_number_max[
#define YYTRANSLATE(YYX) \
- ((YYX <= 0) ? YYEOF : \
- (unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
+ ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
/* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX. */
static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
};
#if YYDEBUG
-/* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
- YYRHS. */
-static const ]b4_int_type_for([b4_prhs])[ yyprhs[] =
-{
- ]b4_prhs[
-};
-
-/* YYRHS -- A `-1'-separated list of the rules' RHS. */
-static const ]b4_int_type_for([b4_rhs])[ yyrhs[] =
-{
- ]b4_rhs[
-};
-
/* YYRLINE[YYN] -- source line where rule number YYN was defined. */
static const ]b4_int_type_for([b4_rline])[ yyrline[] =
{
};
#endif
-/* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */
-static const ]b4_int_type_for([b4_r1])[ yyr1[] =
-{
- ]b4_r1[
-};
+#define YYPACT_NINF ]b4_pact_ninf[
+#define YYTABLE_NINF ]b4_table_ninf[
-/* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN. */
-static const ]b4_int_type_for([b4_r2])[ yyr2[] =
-{
- ]b4_r2[
-};
+]b4_parser_tables_define[
/* YYDPREC[RULE-NUM] -- Dynamic precedence of rule #RULE-NUM (0 if none). */
static const ]b4_int_type_for([b4_dprec])[ yydprec[] =
]b4_merger[
};
-/* YYDEFACT[S] -- default rule to reduce with in state S when YYTABLE
- doesn't specify something else to do. Zero means the default is an
- error. */
-static const ]b4_int_type_for([b4_defact])[ yydefact[] =
+/* YYIMMEDIATE[RULE-NUM] -- True iff rule #RULE-NUM is not to be deferred, as
+ in the case of predicates. */
+static const yybool yyimmediate[] =
{
- ]b4_defact[
-};
-
-/* YYPDEFGOTO[NTERM-NUM]. */
-static const ]b4_int_type_for([b4_defgoto])[ yydefgoto[] =
-{
- ]b4_defgoto[
-};
-
-/* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
- STATE-NUM. */
-#define YYPACT_NINF ]b4_pact_ninf[
-static const ]b4_int_type_for([b4_pact])[ yypact[] =
-{
- ]b4_pact[
-};
-
-/* YYPGOTO[NTERM-NUM]. */
-static const ]b4_int_type_for([b4_pgoto])[ yypgoto[] =
-{
- ]b4_pgoto[
-};
-
-/* YYTABLE[YYPACT[STATE-NUM]]. What to do in state STATE-NUM. If
- positive, shift that token. If negative, reduce the rule which
- number is the opposite. If zero, do what YYDEFACT says.
- If YYTABLE_NINF, syntax error. */
-#define YYTABLE_NINF ]b4_table_ninf[
-static const ]b4_int_type_for([b4_table])[ yytable[] =
-{
- ]b4_table[
+ ]b4_immediate[
};
/* YYCONFLP[YYPACT[STATE-NUM]] -- Pointer into YYCONFL of start of
{
]b4_conflicting_rules[
};
-
-static const ]b4_int_type_for([b4_check])[ yycheck[] =
-{
- ]b4_check[
-};
-
-/* YYSTOS[STATE-NUM] -- The (internal number of the) accessing
- symbol of state STATE-NUM. */
-static const ]b4_int_type_for([b4_stos])[ yystos[] =
-{
- ]b4_stos[
-};
-
\f
/* Prevent warning if -Wmissing-prototypes. */
]b4_c_ansi_function_decl([yyparse], [int], b4_parse_param)[
If N is 0, then set CURRENT to the empty location which ends
the previous symbol: RHS[0] (always defined). */
-]b4_location_if([[
+]b4_locations_if([[
#define YYRHSLOC(Rhs, K) ((Rhs)[K].yystate.yyloc)
#ifndef YYLLOC_DEFAULT
# define YYLLOC_DEFAULT(Current, Rhs, N) \
typedef enum { yyok, yyaccept, yyabort, yyerr } YYRESULTTAG;
-#define YYCHK(YYE) \
- do { YYRESULTTAG yyflag = YYE; if (yyflag != yyok) return yyflag; } \
- while (YYID (0))
+#define YYCHK(YYE) \
+ do { \
+ YYRESULTTAG yychk_flag = YYE; \
+ if (yychk_flag != yyok) \
+ return yychk_flag; \
+ } while (YYID (0))
#if YYDEBUG
# endif
# define YYDPRINTF(Args) \
-do { \
- if (yydebug) \
- YYFPRINTF Args; \
-} while (YYID (0))
+ do { \
+ if (yydebug) \
+ YYFPRINTF Args; \
+ } while (YYID (0))
]b4_yy_symbol_print_generate([b4_c_ansi_function_def])[
-# define YY_SYMBOL_PRINT(Title, Type, Value, Location) \
-do { \
- if (yydebug) \
- { \
- YYFPRINTF (stderr, "%s ", Title); \
- yy_symbol_print (stderr, Type, \
- Value]b4_location_if([, Location])[]b4_user_args[); \
- YYFPRINTF (stderr, "\n"); \
- } \
-} while (YYID (0))
+# define YY_SYMBOL_PRINT(Title, Type, Value, Location) \
+ do { \
+ if (yydebug) \
+ { \
+ YYFPRINTF (stderr, "%s ", Title); \
+ yy_symbol_print (stderr, Type, \
+ Value]b4_locations_if([, Location])[]b4_user_args[); \
+ YYFPRINTF (stderr, "\n"); \
+ } \
+ } while (YYID (0))
/* Nonzero means print parse trace. It is left uninitialized so that
multiple parsers can coexist. */
#define YYHEADROOM 2
#ifndef YYSTACKEXPANDABLE
-# if (! defined __cplusplus \
- || (]b4_location_if([[defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL \
- && ]])[defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL))
# define YYSTACKEXPANDABLE 1
-# else
-# define YYSTACKEXPANDABLE 0
-# endif
#endif
#if YYSTACKEXPANDABLE
typedef int yyRuleNum;
/** Grammar symbol */
-typedef short int yySymbol;
+typedef int yySymbol;
/** Item references, as in LALR(1) machine */
typedef short int yyItemNum;
yyStateNum yylrState;
/** Preceding state in this stack */
yyGLRState* yypred;
- /** Source position of the first token produced by my symbol */
+ /** Source position of the last token produced by my symbol */
size_t yyposn;
union {
/** First in a chain of alternative reductions producing the
struct yyGLRStack {
int yyerrState;
-]b4_location_if([[ /* To compute the location of the error token. */
+]b4_locations_if([[ /* To compute the location of the error token. */
yyGLRStackItem yyerror_range[3];]])[
]b4_pure_if(
[
s = yyvsp[yylow0].yystate.yypred;
for (i = yylow0-1; i >= yylow1; i -= 1)
{
- YYASSERT (s->yyresolved);
- yyvsp[i].yystate.yyresolved = yytrue;
- yyvsp[i].yystate.yysemantics.yysval = s->yysemantics.yysval;
+#if YYDEBUG
+ yyvsp[i].yystate.yylrState = s->yylrState;
+#endif
+ yyvsp[i].yystate.yyresolved = s->yyresolved;
+ if (s->yyresolved)
+ yyvsp[i].yystate.yysemantics.yysval = s->yysemantics.yysval;
+ else
+ /* The effect of using yysval or yyloc (in an immediate rule) is
+ * undefined. */
+ yyvsp[i].yystate.yysemantics.yyfirstVal = NULL;
yyvsp[i].yystate.yyloc = s->yyloc;
s = yyvsp[i].yystate.yypred = s->yypred;
}
# undef YYERROR
# define YYERROR return yyerrok, yyerr
# undef YYRECOVERING
-# define YYRECOVERING (yystackp->yyerrState != 0)
+# define YYRECOVERING() (yystackp->yyerrState != 0)
# undef yyclearin
# define yyclearin (yychar = YYEMPTY)
# undef YYFILL
else
*yyvalp = yyvsp[YYFILL (1-yyrhslen)].yystate.yysemantics.yysval;
YYLLOC_DEFAULT ((*yylocp), (yyvsp - yyrhslen), yyrhslen);
-]b4_location_if([[ yystackp->yyerror_range[1].yystate.yyloc = *yylocp;
+]b4_locations_if([[ yystackp->yyerror_range[1].yystate.yyloc = *yylocp;
]])[
switch (yyn)
{
- ]b4_actions
-/* Line __line__ of glr.c. */
-b4_syncline([@oline@], [@ofile@])[
+ ]b4_user_actions[
default: break;
}
{
if (yys->yyresolved)
yydestruct (yymsg, yystos[yys->yylrState],
- &yys->yysemantics.yysval]b4_location_if([, &yys->yyloc])[]b4_user_args[);
+ &yys->yysemantics.yysval]b4_locations_if([, &yys->yyloc])[]b4_user_args[);
else
{
#if YYDEBUG
else
YYFPRINTF (stderr, "%s incomplete ", yymsg);
yy_symbol_print (stderr, yystos[yys->yylrState],
- NULL]b4_location_if([, &yys->yyloc])[]b4_user_args[);
+ NULL]b4_locations_if([, &yys->yyloc])[]b4_user_args[);
YYFPRINTF (stderr, "\n");
}
#endif
}
}
-/** Left-hand-side symbol for rule #RULE. */
+/** Left-hand-side symbol for rule #YYRULE. */
static inline yySymbol
yylhsNonterm (yyRuleNum yyrule)
{
return yyr1[yyrule];
}
-#define yyis_pact_ninf(yystate) \
- ]m4_if(m4_eval(b4_pact_ninf < b4_pact_min), [1],
- [0],
- [((yystate) == YYPACT_NINF)])[
+#define yypact_value_is_default(yystate) \
+ ]b4_table_value_equals([[pact]], [[yystate]], [b4_pact_ninf])[
-/** True iff LR state STATE has only a default reduction (regardless
+/** True iff LR state YYSTATE has only a default reduction (regardless
* of token). */
static inline yybool
yyisDefaultedState (yyStateNum yystate)
{
- return yyis_pact_ninf (yypact[yystate]);
+ return yypact_value_is_default (yypact[yystate]);
}
-/** The default reduction for STATE, assuming it has one. */
+/** The default reduction for YYSTATE, assuming it has one. */
static inline yyRuleNum
yydefaultAction (yyStateNum yystate)
{
return yydefact[yystate];
}
-#define yyis_table_ninf(yytable_value) \
- ]m4_if(m4_eval(b4_table_ninf < b4_table_min), [1],
- [YYID (0)],
- [((yytable_value) == YYTABLE_NINF)])[
+#define yytable_value_is_error(yytable_value) \
+ ]b4_table_value_equals([[table]], [[yytable_value]], [b4_table_ninf])[
/** Set *YYACTION to the action to take in YYSTATE on seeing YYTOKEN.
* Result R means
* R < 0: Reduce on rule -R.
* R = 0: Error.
* R > 0: Shift to state R.
- * Set *CONFLICTS to a pointer into yyconfl to 0-terminated list of
- * conflicting reductions.
+ * Set *YYCONFLICTS to a pointer into yyconfl to a 0-terminated list
+ * of conflicting reductions.
*/
static inline void
yygetLRActions (yyStateNum yystate, int yytoken,
int* yyaction, const short int** yyconflicts)
{
int yyindex = yypact[yystate] + yytoken;
- if (yyindex < 0 || YYLAST < yyindex || yycheck[yyindex] != yytoken)
+ if (yypact_value_is_default (yypact[yystate])
+ || yyindex < 0 || YYLAST < yyindex || yycheck[yyindex] != yytoken)
{
*yyaction = -yydefact[yystate];
*yyconflicts = yyconfl;
}
- else if (! yyis_table_ninf (yytable[yyindex]))
+ else if (! yytable_value_is_error (yytable[yyindex]))
{
*yyaction = yytable[yyindex];
*yyconflicts = yyconfl + yyconflp[yyindex];
static inline yyStateNum
yyLRgotoState (yyStateNum yystate, yySymbol yylhs)
{
- int yyr;
- yyr = yypgoto[yylhs - YYNTOKENS] + yystate;
+ int yyr = yypgoto[yylhs - YYNTOKENS] + yystate;
if (0 <= yyr && yyr <= YYLAST && yycheck[yyr] == yystate)
return yytable[yyr];
else
/* GLRStates */
-/** Return a fresh GLRStackItem. Callers should call
- * YY_RESERVE_GLRSTACK afterwards to make sure there is sufficient
- * headroom. */
+/** Return a fresh GLRStackItem in YYSTACKP. The item is an LR state
+ * if YYISSTATE, and otherwise a semantic option. Callers should call
+ * YY_RESERVE_GLRSTACK afterwards to make sure there is sufficient
+ * headroom. */
static inline yyGLRStackItem*
yynewGLRStackItem (yyGLRStack* yystackp, yybool yyisState)
}
/** Add a new semantic action that will execute the action for rule
- * RULENUM on the semantic values in RHS to the list of
- * alternative actions for STATE. Assumes that RHS comes from
- * stack #K of *STACKP. */
+ * YYRULE on the semantic values in YYRHS to the list of
+ * alternative actions for YYSTATE. Assumes that YYRHS comes from
+ * stack #YYK of *YYSTACKP. */
static void
yyaddDeferredAction (yyGLRStack* yystackp, size_t yyk, yyGLRState* yystate,
- yyGLRState* rhs, yyRuleNum yyrule)
+ yyGLRState* yyrhs, yyRuleNum yyrule)
{
yySemanticOption* yynewOption =
&yynewGLRStackItem (yystackp, yyfalse)->yyoption;
- yynewOption->yystate = rhs;
+ yynewOption->yystate = yyrhs;
yynewOption->yyrule = yyrule;
if (yystackp->yytops.yylookaheadNeeds[yyk])
{
/* GLRStacks */
-/** Initialize SET to a singleton set containing an empty stack. */
+/** Initialize YYSET to a singleton set containing an empty stack. */
static yybool
yyinitStateSet (yyGLRStateSet* yyset)
{
YYFREE (yyset->yylookaheadNeeds);
}
-/** Initialize STACK to a single empty stack, with total maximum
- * capacity for all stacks of SIZE. */
+/** Initialize *YYSTACKP to a single empty stack, with total maximum
+ * capacity for all stacks of YYSIZE. */
static yybool
yyinitGLRStack (yyGLRStack* yystackp, size_t yysize)
{
# define YYRELOC(YYFROMITEMS,YYTOITEMS,YYX,YYTYPE) \
&((YYTOITEMS) - ((YYFROMITEMS) - (yyGLRStackItem*) (YYX)))->YYTYPE
-/** If STACK is expandable, extend it. WARNING: Pointers into the
+/** If *YYSTACKP is expandable, extend it. WARNING: Pointers into the
stack from outside should be considered invalid after this call.
We always expand when there are 1 or fewer items left AFTER an
allocation, so that we can avoid having external pointers exist
yyfreeStateSet (&yystackp->yytops);
}
-/** Assuming that S is a GLRState somewhere on STACK, update the
- * splitpoint of STACK, if needed, so that it is at least as deep as
- * S. */
+/** Assuming that YYS is a GLRState somewhere on *YYSTACKP, update the
+ * splitpoint of *YYSTACKP, if needed, so that it is at least as deep as
+ * YYS. */
static inline void
yyupdateSplit (yyGLRStack* yystackp, yyGLRState* yys)
{
yystackp->yysplitPoint = yys;
}
-/** Invalidate stack #K in STACK. */
+/** Invalidate stack #YYK in *YYSTACKP. */
static inline void
yymarkStackDeleted (yyGLRStack* yystackp, size_t yyk)
{
yystackp->yytops.yystates[yyk] = NULL;
}
-/** Undelete the last stack that was marked as deleted. Can only be
- done once after a deletion, and only when all other stacks have
+/** Undelete the last stack in *YYSTACKP that was marked as deleted. Can
+ only be done once after a deletion, and only when all other stacks have
been deleted. */
static void
yyundeleteLastStack (yyGLRStack* yystackp)
}
}
-/** Shift to a new state on stack #K of STACK, corresponding to LR state
- * LRSTATE, at input position POSN, with (resolved) semantic value SVAL. */
+/** Shift to a new state on stack #YYK of *YYSTACKP, corresponding to LR
+ * state YYLRSTATE, at input position YYPOSN, with (resolved) semantic
+ * value *YYVALP and source location *YYLOCP. */
static inline void
yyglrShift (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState,
size_t yyposn,
YY_RESERVE_GLRSTACK (yystackp);
}
-/** Shift stack #K of YYSTACK, to a new state corresponding to LR
+/** Shift stack #YYK of *YYSTACKP, to a new state corresponding to LR
* state YYLRSTATE, at input position YYPOSN, with the (unresolved)
* semantic value of YYRHS under the action for YYRULE. */
static inline void
yyglrShiftDefer (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState,
- size_t yyposn, yyGLRState* rhs, yyRuleNum yyrule)
+ size_t yyposn, yyGLRState* yyrhs, yyRuleNum yyrule)
{
yyGLRState* yynewState = &yynewGLRStackItem (yystackp, yytrue)->yystate;
yystackp->yytops.yystates[yyk] = yynewState;
/* Invokes YY_RESERVE_GLRSTACK. */
- yyaddDeferredAction (yystackp, yyk, yynewState, rhs, yyrule);
+ yyaddDeferredAction (yystackp, yyk, yynewState, yyrhs, yyrule);
}
-/** Pop the symbols consumed by reduction #RULE from the top of stack
- * #K of STACK, and perform the appropriate semantic action on their
+#if !YYDEBUG
+# define YY_REDUCE_PRINT(Args)
+#else
+# define YY_REDUCE_PRINT(Args) \
+do { \
+ if (yydebug) \
+ yy_reduce_print Args; \
+} while (YYID (0))
+
+/*----------------------------------------------------------------------.
+| Report that stack #YYK of *YYSTACKP is going to be reduced by YYRULE. |
+`----------------------------------------------------------------------*/
+
+/*ARGSUSED*/ static inline void
+yy_reduce_print (int yynormal, yyGLRStackItem* yyvsp, size_t yyk, yyRuleNum yyrule]b4_user_formals[)
+{
+ int yynrhs = yyrhsLength (yyrule);]b4_locations_if([
+ int yylow = 1;])[
+ int yyi;
+]b4_parse_param_use[]dnl
+[ YYFPRINTF (stderr, "Reducing stack %lu by rule %d (line %lu):\n",
+ (unsigned long int) yyk, yyrule - 1,
+ (unsigned long int) yyrline[yyrule]);
+ if (! yynormal)
+ yyfillin (yyvsp, 1, -yynrhs);
+ /* The symbols being reduced. */
+ for (yyi = 0; yyi < yynrhs; yyi++)
+ {
+ YYFPRINTF (stderr, " $%d = ", yyi + 1);
+ yy_symbol_print (stderr,
+ yystos[yyvsp[yyi - yynrhs + 1].yystate.yylrState],
+ &yyvsp[yyi - yynrhs + 1].yystate.yysemantics.yysval
+ ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
+ b4_user_args[);
+ if (!yyvsp[yyi - yynrhs + 1].yystate.yyresolved)
+ YYFPRINTF (stderr, " (unresolved)");
+ YYFPRINTF (stderr, "\n");
+ }
+}
+#endif
+
+/** Pop the symbols consumed by reduction #YYRULE from the top of stack
+ * #YYK of *YYSTACKP, and perform the appropriate semantic action on their
* semantic values. Assumes that all ambiguities in semantic values
- * have been previously resolved. Set *VALP to the resulting value,
- * and *LOCP to the computed location (if any). Return value is as
+ * have been previously resolved. Set *YYVALP to the resulting value,
+ * and *YYLOCP to the computed location (if any). Return value is as
* for userAction. */
static inline YYRESULTTAG
yydoAction (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
if (yystackp->yysplitPoint == NULL)
{
/* Standard special case: single stack. */
- yyGLRStackItem* rhs = (yyGLRStackItem*) yystackp->yytops.yystates[yyk];
+ yyGLRStackItem* yyrhs = (yyGLRStackItem*) yystackp->yytops.yystates[yyk];
YYASSERT (yyk == 0);
yystackp->yynextFree -= yynrhs;
yystackp->yyspaceLeft += yynrhs;
yystackp->yytops.yystates[0] = & yystackp->yynextFree[-1].yystate;
- return yyuserAction (yyrule, yynrhs, rhs,
+ YY_REDUCE_PRINT ((1, yyrhs, yyk, yyrule]b4_user_args[));
+ return yyuserAction (yyrule, yynrhs, yyrhs,
yyvalp, yylocp, yystackp]b4_user_args[);
}
else
{
- /* At present, doAction is never called in nondeterministic
- * mode, so this branch is never taken. It is here in
- * anticipation of a future feature that will allow immediate
- * evaluation of selected actions in nondeterministic mode. */
int yyi;
yyGLRState* yys;
yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1];
yys = yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred
- = yystackp->yytops.yystates[yyk];]b4_location_if([[
+ = yystackp->yytops.yystates[yyk];]b4_locations_if([[
if (yynrhs == 0)
/* Set default location. */
yyrhsVals[YYMAXRHS + YYMAXLEFT - 1].yystate.yyloc = yys->yyloc;]])[
}
yyupdateSplit (yystackp, yys);
yystackp->yytops.yystates[yyk] = yys;
+ YY_REDUCE_PRINT ((0, yyrhsVals + YYMAXRHS + YYMAXLEFT - 1, yyk, yyrule]b4_user_args[));
return yyuserAction (yyrule, yynrhs, yyrhsVals + YYMAXRHS + YYMAXLEFT - 1,
yyvalp, yylocp, yystackp]b4_user_args[);
}
}
-#if !YYDEBUG
-# define YY_REDUCE_PRINT(Args)
-#else
-# define YY_REDUCE_PRINT(Args) \
-do { \
- if (yydebug) \
- yy_reduce_print Args; \
-} while (YYID (0))
-
-/*----------------------------------------------------------.
-| Report that the RULE is going to be reduced on stack #K. |
-`----------------------------------------------------------*/
-
-/*ARGSUSED*/ static inline void
-yy_reduce_print (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
- YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[)
-{
- int yynrhs = yyrhsLength (yyrule);
- yybool yynormal __attribute__ ((__unused__)) =
- (yystackp->yysplitPoint == NULL);
- yyGLRStackItem* yyvsp = (yyGLRStackItem*) yystackp->yytops.yystates[yyk];
- int yylow = 1;
- int yyi;
- YYUSE (yyvalp);
- YYUSE (yylocp);
-]b4_parse_param_use[]dnl
-[ YYFPRINTF (stderr, "Reducing stack %lu by rule %d (line %lu):\n",
- (unsigned long int) yyk, yyrule - 1,
- (unsigned long int) yyrline[yyrule]);
- /* The symbols being reduced. */
- for (yyi = 0; yyi < yynrhs; yyi++)
- {
- fprintf (stderr, " $%d = ", yyi + 1);
- yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi],
- &]b4_rhs_value(yynrhs, yyi + 1)[
- ]b4_location_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
- b4_user_args[);
- fprintf (stderr, "\n");
- }
-}
-#endif
-
-/** Pop items off stack #K of STACK according to grammar rule RULE,
+/** Pop items off stack #YYK of *YYSTACKP according to grammar rule YYRULE,
* and push back on the resulting nonterminal symbol. Perform the
- * semantic action associated with RULE and store its value with the
- * newly pushed state, if FORCEEVAL or if STACK is currently
+ * semantic action associated with YYRULE and store its value with the
+ * newly pushed state, if YYFORCEEVAL or if *YYSTACKP is currently
* unambiguous. Otherwise, store the deferred semantic action with
* the new state. If the new state would have an identical input
* position, LR state, and predecessor to an existing state on the stack,
- * it is identified with that existing state, eliminating stack #K from
- * the STACK. In this case, the (necessarily deferred) semantic value is
+ * it is identified with that existing state, eliminating stack #YYK from
+ * *YYSTACKP. In this case, the semantic value is
* added to the options for the existing state's semantic value.
*/
static inline YYRESULTTAG
if (yyforceEval || yystackp->yysplitPoint == NULL)
{
+ YYRESULTTAG yyflag;
YYSTYPE yysval;
YYLTYPE yyloc;
- YY_REDUCE_PRINT ((yystackp, yyk, yyrule, &yysval, &yyloc]b4_user_args[));
- YYCHK (yydoAction (yystackp, yyk, yyrule, &yysval,
- &yyloc]b4_user_args[));
+ yyflag = yydoAction (yystackp, yyk, yyrule, &yysval,
+ &yyloc]b4_user_args[);
+ if (yyflag == yyerr && yystackp->yysplitPoint != NULL)
+ {
+ YYDPRINTF ((stderr, "Parse on stack %lu rejected by rule #%d.\n",
+ (unsigned long int) yyk, yyrule - 1));
+ }
+ if (yyflag != yyok)
+ return yyflag;
YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyrule], &yysval, &yyloc);
yyglrShift (yystackp, yyk,
yyLRgotoState (yystackp->yytops.yystates[yyk]->yylrState,
return yystackp->yytops.yysize-1;
}
-/** True iff Y0 and Y1 represent identical options at the top level.
+/** True iff YYY0 and YYY1 represent identical options at the top level.
* That is, they represent the same rule applied to RHS symbols
* that produce the same terminal symbols. */
static yybool
return yyfalse;
}
-/** Assuming identicalOptions (Y0,Y1), destructively merge the
- * alternative semantic values for the RHS-symbols of Y1 and Y0. */
+/** Assuming identicalOptions (YYY0,YYY1), destructively merge the
+ * alternative semantic values for the RHS-symbols of YYY1 and YYY0. */
static void
yymergeOptionSets (yySemanticOption* yyy0, yySemanticOption* yyy1)
{
yyGLRStack* yystackp]b4_user_formals[);
-/** Resolve the previous N states starting at and including state S. If result
- * != yyok, some states may have been left unresolved possibly with empty
- * semantic option chains. Regardless of whether result = yyok, each state
- * has been left with consistent data so that yydestroyGLRState can be invoked
- * if necessary. */
+/** Resolve the previous YYN states starting at and including state YYS
+ * on *YYSTACKP. If result != yyok, some states may have been left
+ * unresolved possibly with empty semantic option chains. Regardless
+ * of whether result = yyok, each state has been left with consistent
+ * data so that yydestroyGLRState can be invoked if necessary. */
static YYRESULTTAG
yyresolveStates (yyGLRState* yys, int yyn,
yyGLRStack* yystackp]b4_user_formals[)
return yyok;
}
-/** Resolve the states for the RHS of OPT, perform its user action, and return
- * the semantic value and location. Regardless of whether result = yyok, all
- * RHS states have been destroyed (assuming the user action destroys all RHS
+/** Resolve the states for the RHS of YYOPT on *YYSTACKP, perform its
+ * user action, and return the semantic value and location in *YYVALP
+ * and *YYLOCP. Regardless of whether result = yyok, all RHS states
+ * have been destroyed (assuming the user action destroys all RHS
* semantic values if invoked). */
static YYRESULTTAG
yyresolveAction (yySemanticOption* yyopt, yyGLRStack* yystackp,
return yyflag;
}
- yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred = yyopt->yystate;]b4_location_if([[
+ yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred = yyopt->yystate;]b4_locations_if([[
if (yynrhs == 0)
/* Set default location. */
yyrhsVals[YYMAXRHS + YYMAXLEFT - 1].yystate.yyloc = yyopt->yystate->yyloc;]])[
int yynrhs = yyrhsLength (yyx->yyrule);
int yyi;
yyGLRState* yys;
- yyGLRState* yystates[YYMAXRHS];
+ yyGLRState* yystates[1 + YYMAXRHS];
yyGLRState yyleftmost_state;
for (yyi = yynrhs, yys = yyx->yystate; 0 < yyi; yyi -= 1, yys = yys->yypred)
if (yyx->yystate->yyposn < yys->yyposn + 1)
YYFPRINTF (stderr, "%*s%s -> <Rule %d, empty>\n",
yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)),
- yyx->yyrule);
+ yyx->yyrule - 1);
else
YYFPRINTF (stderr, "%*s%s -> <Rule %d, tokens %lu .. %lu>\n",
yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)),
- yyx->yyrule, (unsigned long int) (yys->yyposn + 1),
+ yyx->yyrule - 1, (unsigned long int) (yys->yyposn + 1),
(unsigned long int) yyx->yystate->yyposn);
for (yyi = 1; yyi <= yynrhs; yyi += 1)
{
{
if (yystates[yyi-1]->yyposn+1 > yystates[yyi]->yyposn)
YYFPRINTF (stderr, "%*s%s <empty>\n", yyindent+2, "",
- yytokenName (yyrhs[yyprhs[yyx->yyrule]+yyi-1]));
+ yytokenName (yystos[yystates[yyi-1]->yylrState]));
else
YYFPRINTF (stderr, "%*s%s <tokens %lu .. %lu>\n", yyindent+2, "",
- yytokenName (yyrhs[yyprhs[yyx->yyrule]+yyi-1]),
- (unsigned long int) (yystates[yyi - 1]->yyposn + 1),
+ yytokenName (yystos[yystates[yyi-1]->yylrState]),
+ (unsigned long int) (yystates[yyi-1]->yyposn + 1),
(unsigned long int) yystates[yyi]->yyposn);
}
else
}
#endif
-static void yyreportAmbiguity (yySemanticOption* yyx0, yySemanticOption* yyx1,
- yyGLRStack* yystackp]b4_pure_formals[)
- __attribute__ ((__noreturn__));
-/*ARGSUSED*/ static void
-yyreportAmbiguity (yySemanticOption* yyx0, yySemanticOption* yyx1,
- yyGLRStack* yystackp]b4_pure_formals[)
+/*ARGSUSED*/ static YYRESULTTAG
+yyreportAmbiguity (yySemanticOption* yyx0,
+ yySemanticOption* yyx1]b4_pure_formals[)
{
YYUSE (yyx0);
YYUSE (yyx1);
yyreportTree (yyx1, 2);
YYFPRINTF (stderr, "\n");
#endif
- yyFail (yystackp][]b4_pure_args[, YY_("syntax is ambiguous"));
+
+ yyerror (]b4_yyerror_args[YY_("syntax is ambiguous"));
+ return yyabort;
}
+/** Resolve the locations for each of the YYN1 states in *YYSTACKP,
+ * ending at YYS1. Has no effect on previously resolved states.
+ * The first semantic option of a state is always chosen. */
+static void
+yyresolveLocations (yyGLRState* yys1, int yyn1,
+ yyGLRStack *yystackp]b4_user_formals[)
+{
+ if (0 < yyn1)
+ {
+ yyresolveLocations (yys1->yypred, yyn1 - 1, yystackp]b4_user_args[);
+ if (!yys1->yyresolved)
+ {
+ yySemanticOption *yyoption;
+ yyGLRStackItem yyrhsloc[1 + YYMAXRHS];
+ int yynrhs;
+ int yychar_current;
+ YYSTYPE yylval_current;
+ YYLTYPE yylloc_current;
+ yyoption = yys1->yysemantics.yyfirstVal;
+ YYASSERT (yyoption != NULL);
+ yynrhs = yyrhsLength (yyoption->yyrule);
+ if (yynrhs > 0)
+ {
+ yyGLRState *yys;
+ int yyn;
+ yyresolveLocations (yyoption->yystate, yynrhs,
+ yystackp]b4_user_args[);
+ for (yys = yyoption->yystate, yyn = yynrhs;
+ yyn > 0;
+ yys = yys->yypred, yyn -= 1)
+ yyrhsloc[yyn].yystate.yyloc = yys->yyloc;
+ }
+ else
+ {
+ /* Both yyresolveAction and yyresolveLocations traverse the GSS
+ in reverse rightmost order. It is only necessary to invoke
+ yyresolveLocations on a subforest for which yyresolveAction
+ would have been invoked next had an ambiguity not been
+ detected. Thus the location of the previous state (but not
+ necessarily the previous state itself) is guaranteed to be
+ resolved already. */
+ yyGLRState *yyprevious = yyoption->yystate;
+ yyrhsloc[0].yystate.yyloc = yyprevious->yyloc;
+ }
+ yychar_current = yychar;
+ yylval_current = yylval;
+ yylloc_current = yylloc;
+ yychar = yyoption->yyrawchar;
+ yylval = yyoption->yyval;
+ yylloc = yyoption->yyloc;
+ YYLLOC_DEFAULT ((yys1->yyloc), yyrhsloc, yynrhs);
+ yychar = yychar_current;
+ yylval = yylval_current;
+ yylloc = yylloc_current;
+ }
+ }
+}
-/** Resolve the ambiguity represented in state S, perform the indicated
- * actions, and set the semantic value of S. If result != yyok, the chain of
- * semantic options in S has been cleared instead or it has been left
- * unmodified except that redundant options may have been removed. Regardless
- * of whether result = yyok, S has been left with consistent data so that
+/** Resolve the ambiguity represented in state YYS in *YYSTACKP,
+ * perform the indicated actions, and set the semantic value of YYS.
+ * If result != yyok, the chain of semantic options in YYS has been
+ * cleared instead or it has been left unmodified except that
+ * redundant options may have been removed. Regardless of whether
+ * result = yyok, YYS has been left with consistent data so that
* yydestroyGLRState can be invoked if necessary. */
static YYRESULTTAG
yyresolveValue (yyGLRState* yys, yyGLRStack* yystackp]b4_user_formals[)
switch (yypreference (yybest, yyp))
{
case 0:
- yyreportAmbiguity (yybest, yyp, yystackp]b4_pure_args[);
+ yyresolveLocations (yys, 1, yystackp]b4_user_args[);
+ return yyreportAmbiguity (yybest, yyp]b4_pure_args[);
break;
case 1:
yymerge = yytrue;
{
yydestruct ("Cleanup: discarding incompletely merged value for",
yystos[yys->yylrState],
- &yysval]b4_location_if([, yylocp])[]b4_user_args[);
+ &yysval]b4_locations_if([, yylocp])[]b4_user_args[);
break;
}
yyuserMerge (yymerger[yyp->yyrule], &yysval, &yysval_other);
yyprocessOneStack (yyGLRStack* yystackp, size_t yyk,
size_t yyposn]b4_pure_formals[)
{
- int yyaction;
- const short int* yyconflicts;
- yyRuleNum yyrule;
-
while (yystackp->yytops.yystates[yyk] != NULL)
{
yyStateNum yystate = yystackp->yytops.yystates[yyk]->yylrState;
if (yyisDefaultedState (yystate))
{
- yyrule = yydefaultAction (yystate);
+ YYRESULTTAG yyflag;
+ yyRuleNum yyrule = yydefaultAction (yystate);
if (yyrule == 0)
{
YYDPRINTF ((stderr, "Stack %lu dies.\n",
yymarkStackDeleted (yystackp, yyk);
return yyok;
}
- YYCHK (yyglrReduce (yystackp, yyk, yyrule, yyfalse]b4_user_args[));
+ yyflag = yyglrReduce (yystackp, yyk, yyrule, yyimmediate[yyrule]]b4_user_args[);
+ if (yyflag == yyerr)
+ {
+ YYDPRINTF ((stderr, "Stack %lu dies (predicate failure or explicit user error).\n",
+ (unsigned long int) yyk));
+ yymarkStackDeleted (yystackp, yyk);
+ return yyok;
+ }
+ if (yyflag != yyok)
+ return yyflag;
}
else
{
yySymbol yytoken;
+ int yyaction;
+ const short int* yyconflicts;
+
yystackp->yytops.yylookaheadNeeds[yyk] = yytrue;
if (yychar == YYEMPTY)
{
YYDPRINTF ((stderr, "Reading a token: "));
yychar = YYLEX;
+ }
+
+ if (yychar <= YYEOF)
+ {
+ yychar = yytoken = YYEOF;
+ YYDPRINTF ((stderr, "Now at end of input.\n"));
+ }
+ else
+ {
yytoken = YYTRANSLATE (yychar);
YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
}
- else
- yytoken = YYTRANSLATE (yychar);
+
yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts);
while (*yyconflicts != 0)
{
+ YYRESULTTAG yyflag;
size_t yynewStack = yysplitStack (yystackp, yyk);
YYDPRINTF ((stderr, "Splitting off stack %lu from %lu.\n",
(unsigned long int) yynewStack,
(unsigned long int) yyk));
- YYCHK (yyglrReduce (yystackp, yynewStack,
- *yyconflicts, yyfalse]b4_user_args[));
- YYCHK (yyprocessOneStack (yystackp, yynewStack,
- yyposn]b4_pure_args[));
+ yyflag = yyglrReduce (yystackp, yynewStack,
+ *yyconflicts,
+ yyimmediate[*yyconflicts]]b4_user_args[);
+ if (yyflag == yyok)
+ YYCHK (yyprocessOneStack (yystackp, yynewStack,
+ yyposn]b4_pure_args[));
+ else if (yyflag == yyerr)
+ {
+ YYDPRINTF ((stderr, "Stack %lu dies.\n",
+ (unsigned long int) yynewStack));
+ yymarkStackDeleted (yystackp, yynewStack);
+ }
+ else
+ return yyflag;
yyconflicts += 1;
}
break;
}
else
- YYCHK (yyglrReduce (yystackp, yyk, -yyaction,
- yyfalse]b4_user_args[));
+ {
+ YYRESULTTAG yyflag = yyglrReduce (yystackp, yyk, -yyaction,
+ yyimmediate[-yyaction]]b4_user_args[);
+ if (yyflag == yyerr)
+ {
+ YYDPRINTF ((stderr, "Stack %lu dies (predicate failure or explicit user error).\n",
+ (unsigned long int) yyk));
+ yymarkStackDeleted (yystackp, yyk);
+ break;
+ }
+ else if (yyflag != yyok)
+ return yyflag;
+ }
}
}
return yyok;
/*ARGSUSED*/ static void
yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
{
- if (yystackp->yyerrState == 0)
+ if (yystackp->yyerrState != 0)
+ return;
+#if ! YYERROR_VERBOSE
+ yyerror (]b4_lyyerror_args[YY_("syntax error"));
+#else
+ yySymbol yytoken = yychar == YYEMPTY ? YYEMPTY : YYTRANSLATE (yychar);
+ size_t yysize0 = yytnamerr (NULL, yytokenName (yytoken));
+ size_t yysize = yysize0;
+ size_t yysize1;
+ yybool yysize_overflow = yyfalse;
+ char* yymsg = NULL;
+ enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
+ /* Internationalized format string. */
+ const char *yyformat = 0;
+ /* Arguments of yyformat. */
+ char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
+ /* Number of reported tokens (one for the "unexpected", one per
+ "expected"). */
+ int yycount = 0;
+
+ /* There are many possibilities here to consider:
+ - If this state is a consistent state with a default action, then
+ the only way this function was invoked is if the default action
+ is an error action. In that case, don't check for expected
+ tokens because there are none.
+ - The only way there can be no lookahead present (in yychar) is if
+ this state is a consistent state with a default action. Thus,
+ detecting the absence of a lookahead is sufficient to determine
+ that there is no unexpected or expected token to report. In that
+ case, just report a simple "syntax error".
+ - Don't assume there isn't a lookahead just because this state is a
+ consistent state with a default action. There might have been a
+ previous inconsistent state, consistent state with a non-default
+ action, or user semantic action that manipulated yychar.
+ - Of course, the expected token list depends on states to have
+ correct lookahead information, and it depends on the parser not
+ to perform extra reductions after fetching a lookahead from the
+ scanner and before detecting a syntax error. Thus, state merging
+ (from LALR or IELR) and default reductions corrupt the expected
+ token list. However, the list is correct for canonical LR with
+ one exception: it will still contain any token that will not be
+ accepted due to an error action in a later state.
+ */
+ if (yytoken != YYEMPTY)
{
-#if YYERROR_VERBOSE
- int yyn;
- yyn = yypact[yystackp->yytops.yystates[0]->yylrState];
- if (YYPACT_NINF < yyn && yyn < YYLAST)
- {
- yySymbol yytoken = YYTRANSLATE (yychar);
- size_t yysize0 = yytnamerr (NULL, yytokenName (yytoken));
- size_t yysize = yysize0;
- size_t yysize1;
- yybool yysize_overflow = yyfalse;
- char* yymsg = NULL;
- enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
- char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
- int yyx;
- char *yyfmt;
- char const *yyf;
- static char const yyunexpected[] = "syntax error, unexpected %s";
- static char const yyexpecting[] = ", expecting %s";
- static char const yyor[] = " or %s";
- char yyformat[sizeof yyunexpected
- + sizeof yyexpecting - 1
- + ((YYERROR_VERBOSE_ARGS_MAXIMUM - 2)
- * (sizeof yyor - 1))];
- char const *yyprefix = yyexpecting;
-
- /* Start YYX at -YYN if negative to avoid negative indexes in
- YYCHECK. */
- int yyxbegin = yyn < 0 ? -yyn : 0;
-
- /* Stay within bounds of both yycheck and yytname. */
- int yychecklim = YYLAST - yyn;
- int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
- int yycount = 1;
-
- yyarg[0] = yytokenName (yytoken);
- yyfmt = yystpcpy (yyformat, yyunexpected);
-
- for (yyx = yyxbegin; yyx < yyxend; ++yyx)
- if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
- {
- if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
- {
- yycount = 1;
- yysize = yysize0;
- yyformat[sizeof yyunexpected - 1] = '\0';
- break;
- }
- yyarg[yycount++] = yytokenName (yyx);
- yysize1 = yysize + yytnamerr (NULL, yytokenName (yyx));
- yysize_overflow |= yysize1 < yysize;
- yysize = yysize1;
- yyfmt = yystpcpy (yyfmt, yyprefix);
- yyprefix = yyor;
- }
+ int yyn = yypact[yystackp->yytops.yystates[0]->yylrState];
+ yyarg[yycount++] = yytokenName (yytoken);
+ if (!yypact_value_is_default (yyn))
+ {
+ /* Start YYX at -YYN if negative to avoid negative indexes in
+ YYCHECK. In other words, skip the first -YYN actions for this
+ state because they are default actions. */
+ int yyxbegin = yyn < 0 ? -yyn : 0;
+ /* Stay within bounds of both yycheck and yytname. */
+ int yychecklim = YYLAST - yyn + 1;
+ int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
+ int yyx;
+ for (yyx = yyxbegin; yyx < yyxend; ++yyx)
+ if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR
+ && !yytable_value_is_error (yytable[yyx + yyn]))
+ {
+ if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
+ {
+ yycount = 1;
+ yysize = yysize0;
+ break;
+ }
+ yyarg[yycount++] = yytokenName (yyx);
+ yysize1 = yysize + yytnamerr (NULL, yytokenName (yyx));
+ yysize_overflow |= yysize1 < yysize;
+ yysize = yysize1;
+ }
+ }
+ }
- yyf = YY_(yyformat);
- yysize1 = yysize + strlen (yyf);
- yysize_overflow |= yysize1 < yysize;
- yysize = yysize1;
+ switch (yycount)
+ {
+#define YYCASE_(N, S) \
+ case N: \
+ yyformat = S; \
+ break
+ YYCASE_(0, YY_("syntax error"));
+ YYCASE_(1, YY_("syntax error, unexpected %s"));
+ YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
+ YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
+ YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
+ YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
+#undef YYCASE_
+ }
- if (!yysize_overflow)
- yymsg = (char *) YYMALLOC (yysize);
+ yysize1 = yysize + strlen (yyformat);
+ yysize_overflow |= yysize1 < yysize;
+ yysize = yysize1;
- if (yymsg)
- {
- char *yyp = yymsg;
- int yyi = 0;
- while ((*yyp = *yyf))
- {
- if (*yyp == '%' && yyf[1] == 's' && yyi < yycount)
- {
- yyp += yytnamerr (yyp, yyarg[yyi++]);
- yyf += 2;
- }
- else
- {
- yyp++;
- yyf++;
- }
- }
- yyerror (]b4_lyyerror_args[yymsg);
- YYFREE (yymsg);
- }
- else
- {
- yyerror (]b4_lyyerror_args[YY_("syntax error"));
- yyMemoryExhausted (yystackp);
- }
- }
- else
-#endif /* YYERROR_VERBOSE */
- yyerror (]b4_lyyerror_args[YY_("syntax error"));
- yynerrs += 1;
+ if (!yysize_overflow)
+ yymsg = (char *) YYMALLOC (yysize);
+
+ if (yymsg)
+ {
+ char *yyp = yymsg;
+ int yyi = 0;
+ while ((*yyp = *yyformat))
+ {
+ if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount)
+ {
+ yyp += yytnamerr (yyp, yyarg[yyi++]);
+ yyformat += 2;
+ }
+ else
+ {
+ yyp++;
+ yyformat++;
+ }
+ }
+ yyerror (]b4_lyyerror_args[yymsg);
+ YYFREE (yymsg);
+ }
+ else
+ {
+ yyerror (]b4_lyyerror_args[YY_("syntax error"));
+ yyMemoryExhausted (yystackp);
}
+#endif /* YYERROR_VERBOSE */
+ yynerrs += 1;
}
/* Recover from a syntax error on *YYSTACKP, assuming that *YYSTACKP->YYTOKENP,
yylval, and yylloc are the syntactic category, semantic value, and location
- of the look-ahead. */
+ of the lookahead. */
/*ARGSUSED*/ static void
yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
{
if (yychar == YYEOF)
yyFail (yystackp][]b4_lpure_args[, NULL);
if (yychar != YYEMPTY)
- {]b4_location_if([[
+ {]b4_locations_if([[
/* We throw away the lookahead, but the error range
of the shifted error token must take it into account. */
yyGLRState *yys = yystackp->yytops.yystates[0];
YYLLOC_DEFAULT ((yys->yyloc), yyerror_range, 2);]])[
yytoken = YYTRANSLATE (yychar);
yydestruct ("Error: discarding",
- yytoken, &yylval]b4_location_if([, &yylloc])[]b4_user_args[);
+ yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
}
YYDPRINTF ((stderr, "Reading a token: "));
yychar = YYLEX;
- yytoken = YYTRANSLATE (yychar);
- YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
+ if (yychar <= YYEOF)
+ {
+ yychar = yytoken = YYEOF;
+ YYDPRINTF ((stderr, "Now at end of input.\n"));
+ }
+ else
+ {
+ yytoken = YYTRANSLATE (yychar);
+ YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
+ }
yyj = yypact[yystackp->yytops.yystates[0]->yylrState];
- if (yyis_pact_ninf (yyj))
+ if (yypact_value_is_default (yyj))
return;
yyj += yytoken;
if (yyj < 0 || YYLAST < yyj || yycheck[yyj] != yytoken)
if (yydefact[yystackp->yytops.yystates[0]->yylrState] != 0)
return;
}
- else if (yytable[yyj] != 0 && ! yyis_table_ninf (yytable[yyj]))
+ else if (! yytable_value_is_error (yytable[yyj]))
return;
}
{
yyGLRState *yys = yystackp->yytops.yystates[0];
yyj = yypact[yys->yylrState];
- if (! yyis_pact_ninf (yyj))
+ if (! yypact_value_is_default (yyj))
{
yyj += YYTERROR;
if (0 <= yyj && yyj <= YYLAST && yycheck[yyj] == YYTERROR
&& yyisShiftAction (yytable[yyj]))
{
/* Shift the error token having adjusted its location. */
- YYLTYPE yyerrloc;]b4_location_if([[
+ YYLTYPE yyerrloc;]b4_locations_if([[
yystackp->yyerror_range[2].yystate.yyloc = yylloc;
YYLLOC_DEFAULT (yyerrloc, (yystackp->yyerror_range), 2);]])[
YY_SYMBOL_PRINT ("Shifting", yystos[yytable[yyj]],
break;
}
}
-]b4_location_if([[ yystackp->yyerror_range[1].yystate.yyloc = yys->yyloc;]])[
- yydestroyGLRState ("Error: popping", yys]b4_user_args[);
+]b4_locations_if([[ yystackp->yyerror_range[1].yystate.yyloc = yys->yyloc;]])[
+ if (yys->yypred != NULL)
+ yydestroyGLRState ("Error: popping", yys]b4_user_args[);
yystackp->yytops.yystates[0] = yys->yypred;
yystackp->yynextFree -= 1;
yystackp->yyspaceLeft += 1;
} \
} while (YYID (0))
-
/*----------.
| yyparse. |
`----------*/
yychar = YYEMPTY;
yylval = yyval_default;
-]b4_location_if([
-#if YYLTYPE_IS_TRIVIAL
- yylloc.first_line = yylloc.last_line = 1;
- yylloc.first_column = yylloc.last_column = 0;
+]b4_locations_if([
+#if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL
+ yylloc.first_line = yylloc.last_line = ]b4_location_initial_line[;
+ yylloc.first_column = yylloc.last_column = ]b4_location_initial_column[;
#endif
])
m4_ifdef([b4_initial_action], [
m4_pushdef([b4_at_dollar], [yylloc])dnl
m4_pushdef([b4_dollar_dollar], [yylval])dnl
/* User initialization code. */
- b4_initial_action
+ b4_user_initial_action
m4_popdef([b4_dollar_dollar])dnl
-m4_popdef([b4_at_dollar])dnl
-/* Line __line__ of glr.c. */
-b4_syncline([@oline@], [@ofile@])])dnl
+m4_popdef([b4_at_dollar])])dnl
[
if (! yyinitGLRStack (yystackp, YYINITDEPTH))
goto yyexhaustedlab;
yyrule = yydefaultAction (yystate);
if (yyrule == 0)
{
-]b4_location_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
+]b4_locations_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
yyreportSyntaxError (&yystack]b4_user_args[);
goto yyuser_error;
}
{
YYDPRINTF ((stderr, "Reading a token: "));
yychar = YYLEX;
+ }
+
+ if (yychar <= YYEOF)
+ {
+ yychar = yytoken = YYEOF;
+ YYDPRINTF ((stderr, "Now at end of input.\n"));
+ }
+ else
+ {
yytoken = YYTRANSLATE (yychar);
YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
}
- else
- yytoken = YYTRANSLATE (yychar);
+
yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts);
if (*yyconflicts != 0)
break;
if (yyisShiftAction (yyaction))
{
YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
- if (yychar != YYEOF)
- yychar = YYEMPTY;
+ yychar = YYEMPTY;
yyposn += 1;
yyglrShift (&yystack, 0, yyaction, yyposn, &yylval, &yylloc);
if (0 < yystack.yyerrState)
}
else if (yyisErrorAction (yyaction))
{
-]b4_location_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
+]b4_locations_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
yyreportSyntaxError (&yystack]b4_user_args[);
goto yyuser_error;
}
{
yySymbol yytoken_to_shift;
size_t yys;
- size_t yyn = yystack.yytops.yysize;
- for (yys = 0; yys < yyn; yys += 1)
+ for (yys = 0; yys < yystack.yytops.yysize; yys += 1)
yystackp->yytops.yylookaheadNeeds[yys] = yychar != YYEMPTY;
/* yyprocessOneStack returns one of three things:
Except in the first case, yyparse will invoke yyremoveDeletes and
then shift the next token onto all remaining stacks. This
synchronization of the shift (that is, after all preceding
- reductions on all stacks) helps prevents double destructor calls
+ reductions on all stacks) helps prevent double destructor calls
on yylval in the event of memory exhaustion. */
- for (yys = 0; yys < yyn; yys += 1)
+ for (yys = 0; yys < yystack.yytops.yysize; yys += 1)
YYCHK1 (yyprocessOneStack (&yystack, yys, yyposn]b4_lpure_args[));
yyremoveDeletes (&yystack);
- yyn = yystack.yytops.yysize;
+ if (yystack.yytops.yysize == 0)
+ {
+ yyundeleteLastStack (&yystack);
+ if (yystack.yytops.yysize == 0)
+ yyFail (&yystack][]b4_lpure_args[, YY_("syntax error"));
+ YYCHK1 (yyresolveStack (&yystack]b4_user_args[));
+ YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));
+]b4_locations_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
+ yyreportSyntaxError (&yystack]b4_user_args[);
+ goto yyuser_error;
+ }
/* If any yyglrShift call fails, it will fail after shifting. Thus,
a copy of yylval will already be on stack 0 in the event of a
yytoken_to_shift = YYTRANSLATE (yychar);
yychar = YYEMPTY;
yyposn += 1;
- for (yys = 0; yys < yyn; yys += 1)
+ for (yys = 0; yys < yystack.yytops.yysize; yys += 1)
{
int yyaction;
const short int* yyconflicts;
(unsigned long int) yys,
yystack.yytops.yystates[yys]->yylrState));
}
- if (yystack.yytops.yysize == 0)
- {
- yyundeleteLastStack (&yystack);
- if (yystack.yytops.yysize == 0)
- yyFail (&yystack][]b4_lpure_args[, YY_("syntax error"));
- YYCHK1 (yyresolveStack (&yystack]b4_user_args[));
- YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));
-]b4_location_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
- yyreportSyntaxError (&yystack]b4_user_args[);
- goto yyuser_error;
- }
- else if (yystack.yytops.yysize == 1)
+
+ if (yystack.yytops.yysize == 1)
{
YYCHK1 (yyresolveStack (&yystack]b4_user_args[));
YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));
goto yyreturn;
yyreturn:
- if (yychar != YYEOF && yychar != YYEMPTY)
+ if (yychar != YYEMPTY)
yydestruct ("Cleanup: discarding lookahead",
YYTRANSLATE (yychar),
- &yylval]b4_location_if([, &yylloc])[]b4_user_args[);
+ &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
/* If the stack is well-formed, pop the stack until it is empty,
destroying its entries as we go. But free the stack regardless
while (yystates[yyk])
{
yyGLRState *yys = yystates[yyk];
-]b4_location_if([[ yystack.yyerror_range[1].yystate.yyloc = yys->yyloc;]]
-)[ yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[);
+]b4_locations_if([[ yystack.yyerror_range[1].yystate.yyloc = yys->yyloc;]]
+)[ if (yys->yypred != NULL)
+ yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[);
yystates[yyk] = yys->yypred;
yystack.yynextFree -= 1;
yystack.yyspaceLeft += 1;
yyfreeGLRStack (&yystack);
}
- return yyresult;
+ /* Make sure YYID is used. */
+ return YYID (yyresult);
}
/* DEBUGGING ONLY */
-#ifdef YYDEBUG
+#if YYDEBUG
static void yypstack (yyGLRStack* yystackp, size_t yyk)
__attribute__ ((__unused__));
static void yypdumpstack (yyGLRStack* yystackp) __attribute__ ((__unused__));
if (yys->yypred)
{
yy_yypstack (yys->yypred);
- fprintf (stderr, " -> ");
+ YYFPRINTF (stderr, " -> ");
}
- fprintf (stderr, "%d@@%lu", yys->yylrState, (unsigned long int) yys->yyposn);
+ YYFPRINTF (stderr, "%d@@%lu", yys->yylrState,
+ (unsigned long int) yys->yyposn);
}
static void
yypstates (yyGLRState* yyst)
{
if (yyst == NULL)
- fprintf (stderr, "<null>");
+ YYFPRINTF (stderr, "<null>");
else
yy_yypstack (yyst);
- fprintf (stderr, "\n");
+ YYFPRINTF (stderr, "\n");
}
static void
size_t yyi;
for (yyp = yystackp->yyitems; yyp < yystackp->yynextFree; yyp += 1)
{
- fprintf (stderr, "%3lu. ", (unsigned long int) (yyp - yystackp->yyitems));
+ YYFPRINTF (stderr, "%3lu. ",
+ (unsigned long int) (yyp - yystackp->yyitems));
if (*(yybool *) yyp)
{
- fprintf (stderr, "Res: %d, LR State: %d, posn: %lu, pred: %ld",
- yyp->yystate.yyresolved, yyp->yystate.yylrState,
- (unsigned long int) yyp->yystate.yyposn,
- (long int) YYINDEX (yyp->yystate.yypred));
+ YYFPRINTF (stderr, "Res: %d, LR State: %d, posn: %lu, pred: %ld",
+ yyp->yystate.yyresolved, yyp->yystate.yylrState,
+ (unsigned long int) yyp->yystate.yyposn,
+ (long int) YYINDEX (yyp->yystate.yypred));
if (! yyp->yystate.yyresolved)
- fprintf (stderr, ", firstVal: %ld",
- (long int) YYINDEX (yyp->yystate.yysemantics.yyfirstVal));
+ YYFPRINTF (stderr, ", firstVal: %ld",
+ (long int) YYINDEX (yyp->yystate
+ .yysemantics.yyfirstVal));
}
else
{
- fprintf (stderr, "Option. rule: %d, state: %ld, next: %ld",
- yyp->yyoption.yyrule,
- (long int) YYINDEX (yyp->yyoption.yystate),
- (long int) YYINDEX (yyp->yyoption.yynext));
+ YYFPRINTF (stderr, "Option. rule: %d, state: %ld, next: %ld",
+ yyp->yyoption.yyrule - 1,
+ (long int) YYINDEX (yyp->yyoption.yystate),
+ (long int) YYINDEX (yyp->yyoption.yynext));
}
- fprintf (stderr, "\n");
+ YYFPRINTF (stderr, "\n");
}
- fprintf (stderr, "Tops:");
+ YYFPRINTF (stderr, "Tops:");
for (yyi = 0; yyi < yystackp->yytops.yysize; yyi += 1)
- fprintf (stderr, "%lu: %ld; ", (unsigned long int) yyi,
- (long int) YYINDEX (yystackp->yytops.yystates[yyi]));
- fprintf (stderr, "\n");
+ YYFPRINTF (stderr, "%lu: %ld; ", (unsigned long int) yyi,
+ (long int) YYINDEX (yystackp->yytops.yystates[yyi]));
+ YYFPRINTF (stderr, "\n");
}
#endif
-]
-
-b4_epilogue
-m4_if(b4_defines_flag, 0, [],
-[@output @output_header_name@
-b4_copyright([Skeleton parser for GLR parsing with Bison],
- [2002, 2003, 2004, 2005, 2006])[
-
-/* C GLR parser skeleton written by Paul Hilfinger. */
-]
+]b4_epilogue[]dnl
+dnl
+dnl glr.cc produces its own header.
+dnl
+m4_if(b4_skeleton, ["glr.c"],
+[b4_defines_if(
+[@output(b4_spec_defines_file@)@
+b4_copyright([Skeleton interface for Bison GLR parsers in C],
+ [2002-2011])
b4_shared_declarations
-extern YYSTYPE b4_prefix[]lval;
+b4_pure_if([],
+[[extern YYSTYPE ]b4_prefix[lval;]])
-b4_location_if([b4_pure_if([],
-[extern YYLTYPE b4_prefix[]lloc;])
-])
+b4_locations_if([b4_pure_if([],
+[extern YYLTYPE ]b4_prefix[lloc;])
])
+])])[]dnl
+m4_divert_pop(0)
projects / bison.git / blobdiff