m4_divert(-1) -*- C -*-
# GLR skeleton for Bison
-# Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2003, 2004, 2005, 2006 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
# 02110-1301 USA
+m4_include(b4_pkgdatadir/[c.m4])
+
## ---------------- ##
## Default values. ##
## ---------------- ##
# Accumule in b4_lex_param all the yylex arguments.
# Yes, this is quite ugly...
m4_define([b4_lex_param],
-m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[yylvalp]]][]dnl
-b4_location_if([, [[YYLTYPE *], [yyllocp]]])])dnl
+m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl
+b4_location_if([, [[YYLTYPE *], [&yylloc]]])])dnl
m4_ifdef([b4_lex_param], [, ]b4_lex_param)))
# b4_lyyerror_args
# ----------------
-# Same as above, but on the look-ahead, hence yyllocp instead of yylocp.
+# Same as above, but on the look-ahead, hence &yylloc instead of yylocp.
m4_define([b4_lyyerror_args],
-[b4_pure_if([b4_location_if([yyllocp, ])])dnl
+[b4_pure_if([b4_location_if([&yylloc, ])])dnl
m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
# b4_lpure_args
# -------------
-# Same as above, but on the look-ahead, hence yyllocp instead of yylocp.
+# Same as above, but on the look-ahead, hence &yylloc instead of yylocp.
m4_define([b4_lpure_args],
-[b4_pure_if([b4_location_if([, yyllocp])])[]b4_user_args])
+[b4_pure_if([b4_location_if([, &yylloc])])[]b4_user_args])
# b4_pure_formals
# ---------------
-# Arguments passed to yyerror: user formals plus yyllocp.
+# 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_lpure_formals
-# ----------------
-# Same as above, but on the look-ahead, hence yyllocp instead of yylocp.
-m4_define([b4_lpure_formals],
-[b4_pure_if([b4_location_if([YYLTYPE *yyllocp])])[]b4_user_formals])
-
-
## ----------------- ##
## Semantic Values. ##
## ----------------- ##
m4_divert(0)dnl
@output @output_parser_name@
b4_copyright([Skeleton parser for GLR parsing with Bison],
- [2002, 2003, 2004, 2005])
+ [2002, 2003, 2004, 2005, 2006])
[
-/* This is the parser code for GLR (Generalized LR) parser. */
+/* This is the parser code for GLR (Generalized LR) parser. */
]b4_identification
/* Copy the first part of user declarations. */
]b4_pre_prologue[
-#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED)
+#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
]m4_ifdef([b4_stype],
-[b4_syncline([b4_stype_line], [b4_file_name])
-typedef union m4_bregexp(b4_stype, [^{], [YYSTYPE ])b4_stype YYSTYPE;
+[typedef union m4_bregexp(b4_stype, [^{], [YYSTYPE ])
+b4_stype
/* Line __line__ of glr.c. */
-b4_syncline([@oline@], [@ofile@])],
+b4_syncline([@oline@], [@ofile@])
+ YYSTYPE;],
[typedef int YYSTYPE;])[
# define YYSTYPE_IS_DECLARED 1
# define YYSTYPE_IS_TRIVIAL 1
#endif
-#if ! defined (YYLTYPE) && ! defined (YYLTYPE_IS_DECLARED)
+#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
typedef struct YYLTYPE
{
]b4_location_if([
right-hand sides. Unlike the standard yacc.c template,
here we set the default value of $$ to a zeroed-out value.
Since the default value is undefined, this behavior is
- technically correct. */
+ technically correct. */
static YYSTYPE yyval_default;
/* Copy the second part of user declarations. */
#endif
/* Suppress unused-variable warnings by "using" E. */
-#ifndef lint
+#if ! defined lint || defined __GNUC__
# define YYUSE(e) ((void) (e))
#else
# define YYUSE(e) /* empty */
#ifndef __attribute__
/* This feature is available in gcc versions 2.5 and later. */
-# if (!defined (__GNUC__) || __GNUC__ < 2 \
+# if (! defined __GNUC__ || __GNUC__ < 2 \
|| (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__)
# define __attribute__(Spec) /* empty */
# endif
# define YYASSERT(condition) ((void) ((condition) || (abort (), 0)))
#endif
-/* YYFINAL -- State number of the termination state. */
+/* YYFINAL -- State number of the termination state. */
#define YYFINAL ]b4_final_state_number[
/* YYLAST -- Last index in YYTABLE. */
#define YYLAST ]b4_last[
-/* YYNTOKENS -- Number of terminals. */
+/* YYNTOKENS -- Number of terminals. */
#define YYNTOKENS ]b4_tokens_number[
-/* YYNNTS -- Number of nonterminals. */
+/* YYNNTS -- Number of nonterminals. */
#define YYNNTS ]b4_nterms_number[
-/* YYNRULES -- Number of rules. */
+/* YYNRULES -- Number of rules. */
#define YYNRULES ]b4_rules_number[
-/* YYNRULES -- Number of states. */
+/* YYNRULES -- Number of states. */
#define YYNSTATES ]b4_states_number[
-/* YYMAXRHS -- Maximum number of symbols on right-hand side of rule. */
+/* YYMAXRHS -- Maximum number of symbols on right-hand side of rule. */
#define YYMAXRHS ]b4_r2_max[
/* YYMAXLEFT -- Maximum number of symbols to the left of a handle
- accessed by $0, $-1, etc., in any rule. */
+ accessed by $0, $-1, etc., in any rule. */
#define YYMAXLEFT ]b4_max_left_semantic_context[
/* YYTRANSLATE(X) -- Bison symbol number corresponding to X. */
]b4_prhs[
};
-/* YYRHS -- A `-1'-separated list of the rules' RHS. */
+/* YYRHS -- A `-1'-separated list of the rules' RHS. */
static const ]b4_int_type_for([b4_rhs])[ yyrhs[] =
{
]b4_rhs[
#if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
/* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
- First, the terminals, then, starting at YYNTOKENS, nonterminals. */
+ First, the terminals, then, starting at YYNTOKENS, nonterminals. */
static const char *const yytname[] =
{
]b4_tname[
]b4_r2[
};
-/* YYDPREC[RULE-NUM] -- Dynamic precedence of rule #RULE-NUM (0 if none). */
+/* YYDPREC[RULE-NUM] -- Dynamic precedence of rule #RULE-NUM (0 if none). */
static const ]b4_int_type_for([b4_dprec])[ yydprec[] =
{
]b4_dprec[
};
-/* YYMERGER[RULE-NUM] -- Index of merging function for rule #RULE-NUM. */
+/* YYMERGER[RULE-NUM] -- Index of merging function for rule #RULE-NUM. */
static const ]b4_int_type_for([b4_merger])[ yymerger[] =
{
]b4_merger[
]b4_defact[
};
-/* YYPDEFGOTO[NTERM-NUM]. */
+/* YYPDEFGOTO[NTERM-NUM]. */
static const ]b4_int_type_for([b4_defgoto])[ yydefgoto[] =
{
]b4_defgoto[
#ifndef YYLLOC_DEFAULT
# define YYLLOC_DEFAULT(Current, Rhs, N) \
do \
- if (N) \
+ if (YYID (N)) \
{ \
(Current).first_line = YYRHSLOC (Rhs, 1).first_line; \
(Current).first_column = YYRHSLOC (Rhs, 1).first_column; \
#undef yynerrs
#define yynerrs (yystackp->yyerrcnt)
#undef yychar
-#define yychar (yystackp->yyrawchar)],
+#define yychar (yystackp->yyrawchar)
+#undef yylval
+#define yylval (yystackp->yyval)
+#undef yylloc
+#define yylloc (yystackp->yyloc)
+m4_if(b4_prefix[], [yy], [],
+[#define b4_prefix[]nerrs yynerrs
+#define b4_prefix[]char yychar
+#define b4_prefix[]lval yylval
+#define b4_prefix[]lloc yylloc])],
[YYSTYPE yylval;
YYLTYPE yylloc;
#if YYDEBUG
-#if ! defined (YYFPRINTF)
+# ifndef YYFPRINTF
# define YYFPRINTF fprintf
-#endif
+# endif
# define YYDPRINTF(Args) \
do { \
YYFPRINTF Args; \
} while (YYID (0))
-]b4_yysymprint_generate([b4_c_ansi_function_def])[
+]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); \
- yysymprint (stderr, \
- Type, Value]b4_location_if([, Location])[]b4_user_args[); \
+ yy_symbol_print (stderr, Type, \
+ Value]b4_location_if([, Location])[]b4_user_args[); \
YYFPRINTF (stderr, "\n"); \
} \
} while (YYID (0))
allocation. This is to allow allocation and initialization
to be completed by functions that call yyexpandGLRStack before the
stack is expanded, thus insuring that all necessary pointers get
- properly redirected to new data. */
+ properly redirected to new data. */
#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))
+# 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
#if YYERROR_VERBOSE
# ifndef yystpcpy
-# if defined (__GLIBC__) && defined (_STRING_H) && defined (_GNU_SOURCE)
+# if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE
# define yystpcpy stpcpy
# else
/* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
typedef struct yyGLRStack yyGLRStack;
struct yyGLRState {
- /** Type tag: always true. */
+ /** Type tag: always true. */
yybool yyisState;
- /** Type tag for yysemantics. If true, yysval applies, otherwise
- * yyfirstVal applies. */
+ /** Type tag for yysemantics. If true, yysval applies, otherwise
+ * yyfirstVal applies. */
yybool yyresolved;
- /** Number of corresponding LALR(1) machine state. */
+ /** Number of corresponding LALR(1) machine state. */
yyStateNum yylrState;
/** Preceding state in this stack */
yyGLRState* yypred;
union {
/** First in a chain of alternative reductions producing the
* non-terminal corresponding to this state, threaded through
- * yynext. */
+ * yynext. */
yySemanticOption* yyfirstVal;
- /** Semantic value for this state. */
+ /** Semantic value for this state. */
YYSTYPE yysval;
} yysemantics;
- /** Source location for this state. */
+ /** Source location for this state. */
YYLTYPE yyloc;
};
struct yyGLRStateSet {
yyGLRState** yystates;
+ /** During nondeterministic operation, yylookaheadNeeds tracks which
+ * stacks have actually needed the current lookahead. During deterministic
+ * operation, yylookaheadNeeds[0] is not maintained since it would merely
+ * duplicate yychar != YYEMPTY. */
+ yybool* yylookaheadNeeds;
size_t yysize, yycapacity;
};
struct yySemanticOption {
- /** Type tag: always false. */
+ /** Type tag: always false. */
yybool yyisState;
/** Rule number for this reduction */
yyRuleNum yyrule;
- /** The last RHS state in the list of states to be reduced. */
+ /** The last RHS state in the list of states to be reduced. */
yyGLRState* yystate;
- /** Next sibling in chain of options. To facilitate merging,
- * options are chained in decreasing order by address. */
+ /** The lookahead for this reduction. */
+ int yyrawchar;
+ YYSTYPE yyval;
+ YYLTYPE yyloc;
+ /** Next sibling in chain of options. To facilitate merging,
+ * options are chained in decreasing order by address. */
yySemanticOption* yynext;
};
-/** Type of the items in the GLR stack. The yyisState field
- * indicates which item of the union is valid. */
+/** Type of the items in the GLR stack. The yyisState field
+ * indicates which item of the union is valid. */
union yyGLRStackItem {
yyGLRState yystate;
yySemanticOption yyoption;
[
int yyerrcnt;
int yyrawchar;
+ YYSTYPE yyval;
+ YYLTYPE yyloc;
])[
yySymbol* yytokenp;
YYJMP_BUF yyexception_buffer;
/** Fill in YYVSP[YYLOW1 .. YYLOW0-1] from the chain of states starting
* at YYVSP[YYLOW0].yystate.yypred. Leaves YYVSP[YYLOW1].yystate.yypred
- * containing the pointer to the next state in the chain. */
+ * containing the pointer to the next state in the chain. */
static void yyfillin (yyGLRStackItem *, int, int) __attribute__ ((__unused__));
static void
yyfillin (yyGLRStackItem *yyvsp, int yylow0, int yylow1)
/** Perform user action for rule number YYN, with RHS length YYRHSLEN,
* and top stack item YYVSP. YYLVALP points to place to put semantic
* value ($$), and yylocp points to place for location information
- * (@@$). Returns yyok for normal return, yyaccept for YYACCEPT,
- * yyerr for YYERROR, yyabort for YYABORT. */
+ * (@@$). Returns yyok for normal return, yyaccept for YYACCEPT,
+ * yyerr for YYERROR, yyabort for YYABORT. */
/*ARGSUSED*/ static YYRESULTTAG
yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp,
YYSTYPE* yyvalp,
if (yydebug)
{
YYFPRINTF (stderr, "%s unresolved ", yymsg);
- yysymprint (stderr, yystos[yys->yylrState],
- &yys->yysemantics.yysval]b4_location_if([, &yys->yyloc])[]b4_user_args[);
+ yy_symbol_print (stderr, yystos[yys->yylrState],
+ NULL]b4_location_if([, &yys->yyloc])[]b4_user_args[);
YYFPRINTF (stderr, "\n");
}
#endif
}
}
-/** Left-hand-side symbol for rule #RULE. */
+/** Left-hand-side symbol for rule #RULE. */
static inline yySymbol
yylhsNonterm (yyRuleNum yyrule)
{
[((yystate) == YYPACT_NINF)])[
/** True iff LR state STATE has only a default reduction (regardless
- * of token). */
+ * of token). */
static inline yybool
yyisDefaultedState (yyStateNum yystate)
{
return yyis_pact_ninf (yypact[yystate]);
}
-/** The default reduction for STATE, assuming it has one. */
+/** The default reduction for STATE, assuming it has one. */
static inline yyRuleNum
yydefaultAction (yyStateNum yystate)
{
return yynewItem;
}
+/** 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. */
static void
-yyaddDeferredAction (yyGLRStack* yystackp, yyGLRState* yystate,
+yyaddDeferredAction (yyGLRStack* yystackp, size_t yyk, yyGLRState* yystate,
yyGLRState* rhs, yyRuleNum yyrule)
{
yySemanticOption* yynewOption =
&yynewGLRStackItem (yystackp, yyfalse)->yyoption;
yynewOption->yystate = rhs;
yynewOption->yyrule = yyrule;
+ if (yystackp->yytops.yylookaheadNeeds[yyk])
+ {
+ yynewOption->yyrawchar = yychar;
+ yynewOption->yyval = yylval;
+ yynewOption->yyloc = yylloc;
+ }
+ else
+ yynewOption->yyrawchar = YYEMPTY;
yynewOption->yynext = yystate->yysemantics.yyfirstVal;
yystate->yysemantics.yyfirstVal = yynewOption;
/* GLRStacks */
-/** Initialize SET to a singleton set containing an empty stack. */
+/** Initialize SET to a singleton set containing an empty stack. */
static yybool
yyinitStateSet (yyGLRStateSet* yyset)
{
if (! yyset->yystates)
return yyfalse;
yyset->yystates[0] = NULL;
+ yyset->yylookaheadNeeds =
+ (yybool*) YYMALLOC (16 * sizeof yyset->yylookaheadNeeds[0]);
+ if (! yyset->yylookaheadNeeds)
+ {
+ YYFREE (yyset->yystates);
+ return yyfalse;
+ }
return yytrue;
}
static void yyfreeStateSet (yyGLRStateSet* yyset)
{
YYFREE (yyset->yystates);
+ YYFREE (yyset->yylookaheadNeeds);
}
/** Initialize STACK to a single empty stack, with total maximum
- * capacity for all stacks of SIZE. */
+ * capacity for all stacks of SIZE. */
static yybool
yyinitGLRStack (yyGLRStack* yystackp, size_t yysize)
{
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
- across an allocation. */
+ across an allocation. */
static void
yyexpandGLRStack (yyGLRStack* yystackp)
{
/** 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. */
+ * S. */
static inline void
yyupdateSplit (yyGLRStack* yystackp, yyGLRState* yys)
{
yystackp->yysplitPoint = yys;
}
-/** Invalidate stack #K in STACK. */
+/** Invalidate stack #K in STACK. */
static inline void
yymarkStackDeleted (yyGLRStack* yystackp, size_t yyk)
{
/** Undelete the last stack that was marked as deleted. Can only be
done once after a deletion, and only when all other stacks have
- been deleted. */
+ been deleted. */
static void
yyundeleteLastStack (yyGLRStack* yystackp)
{
else
{
yystackp->yytops.yystates[yyj] = yystackp->yytops.yystates[yyi];
+ /* In the current implementation, it's unnecessary to copy
+ yystackp->yytops.yylookaheadNeeds[yyi] since, after
+ yyremoveDeletes returns, the parser immediately either enters
+ deterministic operation or shifts a token. However, it doesn't
+ hurt, and the code might evolve to need it. */
+ yystackp->yytops.yylookaheadNeeds[yyj] =
+ yystackp->yytops.yylookaheadNeeds[yyi];
if (yyj != yyi)
{
YYDPRINTF ((stderr, "Rename stack %lu -> %lu.\n",
}
/** Shift to a new state on stack #K of STACK, corresponding to LR state
- * LRSTATE, at input position POSN, with (resolved) semantic value SVAL. */
+ * LRSTATE, at input position POSN, with (resolved) semantic value SVAL. */
static inline void
yyglrShift (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState,
size_t yyposn,
/** Shift stack #K of YYSTACK, 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. */
+ * 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)
yynewState->yysemantics.yyfirstVal = NULL;
yystackp->yytops.yystates[yyk] = yynewState;
- /* Invokes YY_RESERVE_GLRSTACK. */
- yyaddDeferredAction (yystackp, yynewState, rhs, yyrule);
+ /* Invokes YY_RESERVE_GLRSTACK. */
+ yyaddDeferredAction (yystackp, yyk, yynewState, rhs, yyrule);
}
/** Pop the symbols consumed by reduction #RULE from the top of stack
* #K of STACK, 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,
+ * have been previously resolved. Set *VALP to the resulting value,
* and *LOCP to the computed location (if any). Return value is as
- * for userAction. */
+ * for userAction. */
static inline YYRESULTTAG
yydoAction (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[)
if (yystackp->yysplitPoint == NULL)
{
- /* Standard special case: single stack. */
+ /* Standard special case: single stack. */
yyGLRStackItem* rhs = (yyGLRStackItem*) yystackp->yytops.yystates[yyk];
YYASSERT (yyk == 0);
yystackp->yynextFree -= yynrhs;
/* 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. */
+ * 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([[
if (yynrhs == 0)
- /* Set default location. */
+ /* Set default location. */
yyrhsVals[YYMAXRHS + YYMAXLEFT - 1].yystate.yyloc = yys->yyloc;]])[
for (yyi = 0; yyi < yynrhs; yyi += 1)
{
for (yyi = 0; yyi < yynrhs; yyi++)
{
fprintf (stderr, " $%d = ", yyi + 1);
- yysymprint (stderr, yyrhs[yyprhs[yyrule] + yyi],
- &]b4_rhs_value(yynrhs, yyi + 1)[
- ]b4_location_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
- b4_user_args[);
+ 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");
}
}
* 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
+ * the STACK. In this case, the (necessarily deferred) semantic value is
* added to the options for the existing state's semantic value.
*/
static inline YYRESULTTAG
yyupdateSplit (yystackp, yys);
yynewLRState = yyLRgotoState (yys->yylrState, yylhsNonterm (yyrule));
YYDPRINTF ((stderr,
- "Reduced stack %lu by rule #%d; action deferred. Now in state %d.\n",
+ "Reduced stack %lu by rule #%d; action deferred. Now in state %d.\n",
(unsigned long int) yyk, yyrule - 1, yynewLRState));
for (yyi = 0; yyi < yystackp->yytops.yysize; yyi += 1)
if (yyi != yyk && yystackp->yytops.yystates[yyi] != NULL)
{
if (yyp->yylrState == yynewLRState && yyp->yypred == yys)
{
- yyaddDeferredAction (yystackp, yyp, yys0, yyrule);
+ yyaddDeferredAction (yystackp, yyk, yyp, yys0, yyrule);
yymarkStackDeleted (yystackp, yyk);
YYDPRINTF ((stderr, "Merging stack %lu into stack %lu.\n",
(unsigned long int) yyk,
if (yystackp->yytops.yysize >= yystackp->yytops.yycapacity)
{
yyGLRState** yynewStates;
- if (! ((yystackp->yytops.yycapacity
- <= (YYSIZEMAX / (2 * sizeof yynewStates[0])))
- && (yynewStates =
- (yyGLRState**) YYREALLOC (yystackp->yytops.yystates,
- ((yystackp->yytops.yycapacity *= 2)
- * sizeof yynewStates[0])))))
+ yybool* yynewLookaheadNeeds;
+
+ yynewStates = NULL;
+
+ if (yystackp->yytops.yycapacity
+ > (YYSIZEMAX / (2 * sizeof yynewStates[0])))
+ yyMemoryExhausted (yystackp);
+ yystackp->yytops.yycapacity *= 2;
+
+ yynewStates =
+ (yyGLRState**) YYREALLOC (yystackp->yytops.yystates,
+ (yystackp->yytops.yycapacity
+ * sizeof yynewStates[0]));
+ if (yynewStates == NULL)
yyMemoryExhausted (yystackp);
yystackp->yytops.yystates = yynewStates;
+
+ yynewLookaheadNeeds =
+ (yybool*) YYREALLOC (yystackp->yytops.yylookaheadNeeds,
+ (yystackp->yytops.yycapacity
+ * sizeof yynewLookaheadNeeds[0]));
+ if (yynewLookaheadNeeds == NULL)
+ yyMemoryExhausted (yystackp);
+ yystackp->yytops.yylookaheadNeeds = yynewLookaheadNeeds;
}
yystackp->yytops.yystates[yystackp->yytops.yysize]
= yystackp->yytops.yystates[yyk];
+ yystackp->yytops.yylookaheadNeeds[yystackp->yytops.yysize]
+ = yystackp->yytops.yylookaheadNeeds[yyk];
yystackp->yytops.yysize += 1;
return yystackp->yytops.yysize-1;
}
/** True iff Y0 and Y1 represent identical options at the top level.
* That is, they represent the same rule applied to RHS symbols
- * that produce the same terminal symbols. */
+ * that produce the same terminal symbols. */
static yybool
yyidenticalOptions (yySemanticOption* yyy0, yySemanticOption* yyy1)
{
}
/** Assuming identicalOptions (Y0,Y1), destructively merge the
- * alternative semantic values for the RHS-symbols of Y1 and Y0. */
+ * alternative semantic values for the RHS-symbols of Y1 and Y0. */
static void
yymergeOptionSets (yySemanticOption* yyy0, yySemanticOption* yyy1)
{
/** Y0 and Y1 represent two possible actions to take in a given
* parsing state; return 0 if no combination is possible,
- * 1 if user-mergeable, 2 if Y0 is preferred, 3 if Y1 is preferred. */
+ * 1 if user-mergeable, 2 if Y0 is preferred, 3 if Y1 is preferred. */
static int
yypreference (yySemanticOption* y0, yySemanticOption* y1)
{
return 0;
}
-static YYRESULTTAG yyresolveValue (yySemanticOption* yyoptionList,
+static YYRESULTTAG yyresolveValue (yyGLRState* yys,
yyGLRStack* yystackp, YYSTYPE* yyvalp,
YYLTYPE* yylocp]b4_user_formals[);
yyresolveStates (yyGLRState* yys, int yyn,
yyGLRStack* yystackp]b4_user_formals[)
{
- YYRESULTTAG yyflag;
if (0 < yyn)
{
YYASSERT (yys->yypred);
- yyflag = yyresolveStates (yys->yypred, yyn-1, yystackp]b4_user_args[);
- if (yyflag != yyok)
- return yyflag;
+ YYCHK (yyresolveStates (yys->yypred, yyn-1, yystackp]b4_user_args[));
if (! yys->yyresolved)
{
- yyflag = yyresolveValue (yys->yysemantics.yyfirstVal, yystackp,
- &yys->yysemantics.yysval, &yys->yyloc
- ]b4_user_args[);
+ YYSTYPE yysval;
+ YYRESULTTAG yyflag = yyresolveValue (yys, yystackp, &yysval,
+ &yys->yyloc]b4_user_args[);
if (yyflag != yyok)
- return yyflag;
+ {
+ yys->yysemantics.yyfirstVal = NULL;
+ return yyflag;
+ }
+ yys->yysemantics.yysval = yysval;
yys->yyresolved = yytrue;
}
}
{
yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1];
int yynrhs;
+ int yychar_current;
+ YYSTYPE yylval_current;
+ YYLTYPE yylloc_current;
+ YYRESULTTAG yyresult;
yynrhs = yyrhsLength (yyopt->yyrule);
YYCHK (yyresolveStates (yyopt->yystate, yynrhs, yystackp]b4_user_args[));
yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred = yyopt->yystate;]b4_location_if([[
if (yynrhs == 0)
- /* Set default location. */
+ /* Set default location. */
yyrhsVals[YYMAXRHS + YYMAXLEFT - 1].yystate.yyloc = yyopt->yystate->yyloc;]])[
- return yyuserAction (yyopt->yyrule, yynrhs,
- yyrhsVals + YYMAXRHS + YYMAXLEFT - 1,
- yyvalp, yylocp, yystackp]b4_user_args[);
+ yychar_current = yychar;
+ yylval_current = yylval;
+ yylloc_current = yylloc;
+ yychar = yyopt->yyrawchar;
+ yylval = yyopt->yyval;
+ yylloc = yyopt->yyloc;
+ yyresult = yyuserAction (yyopt->yyrule, yynrhs,
+ yyrhsVals + YYMAXRHS + YYMAXLEFT - 1,
+ yyvalp, yylocp, yystackp]b4_user_args[);
+ yychar = yychar_current;
+ yylval = yylval_current;
+ yylloc = yylloc_current;
+ return yyresult;
}
#if YYDEBUG
static void yyreportAmbiguity (yySemanticOption* yyx0, yySemanticOption* yyx1,
yyGLRStack* yystackp]b4_pure_formals[)
__attribute__ ((__noreturn__));
-static void
+/*ARGSUSED*/ static void
yyreportAmbiguity (yySemanticOption* yyx0, yySemanticOption* yyx1,
yyGLRStack* yystackp]b4_pure_formals[)
{
}
-/** Resolve the ambiguity represented by OPTIONLIST, perform the indicated
- * actions, and return the result. */
+/** Resolve the ambiguity represented in state S, perform the indicated
+ * actions, and return the result. */
static YYRESULTTAG
-yyresolveValue (yySemanticOption* yyoptionList, yyGLRStack* yystackp,
- YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[)
+yyresolveValue (yyGLRState* yys, yyGLRStack* yystackp, YYSTYPE* yyvalp,
+ YYLTYPE* yylocp]b4_user_formals[)
{
+ yySemanticOption* yyoptionList = yys->yysemantics.yyfirstVal;
yySemanticOption* yybest;
yySemanticOption** yypp;
yybool yymerge;
{
YYSTYPE yyval1;
YYLTYPE yydummy;
- YYCHK (yyresolveAction (yyp, yystackp, &yyval1,
- &yydummy]b4_user_args[));
+ YYRESULTTAG yyflag = yyresolveAction (yyp, yystackp, &yyval1,
+ &yydummy]b4_user_args[);
+ if (yyflag != yyok)
+ {
+ yydestruct ("Cleanup: discarding merged value",
+ yystos[yys->yylrState],
+ yyvalp]b4_location_if([, yylocp])[]b4_user_args[);
+ return yyflag;
+ }
yyuserMerge (yymerger[yyp->yyrule], yyvalp, &yyval1);
}
}
static YYRESULTTAG
yyprocessOneStack (yyGLRStack* yystackp, size_t yyk,
- size_t yyposn, YYSTYPE* yylvalp, YYLTYPE* yyllocp
- ]b4_pure_formals[)
+ size_t yyposn]b4_pure_formals[)
{
int yyaction;
const short int* yyconflicts;
}
else
{
+ yystackp->yytops.yylookaheadNeeds[yyk] = yytrue;
if (*yytokenp == YYEMPTY)
{
YYDPRINTF ((stderr, "Reading a token: "));
yychar = YYLEX;
*yytokenp = YYTRANSLATE (yychar);
- YY_SYMBOL_PRINT ("Next token is", *yytokenp, yylvalp, yyllocp);
+ YY_SYMBOL_PRINT ("Next token is", *yytokenp, &yylval, &yylloc);
}
yygetLRActions (yystate, *yytokenp, &yyaction, &yyconflicts);
(unsigned long int) yyk));
YYCHK (yyglrReduce (yystackp, yynewStack,
*yyconflicts, yyfalse]b4_user_args[));
- YYCHK (yyprocessOneStack (yystackp, yynewStack, yyposn,
- yylvalp, yyllocp]b4_pure_args[));
+ YYCHK (yyprocessOneStack (yystackp, yynewStack,
+ yyposn]b4_pure_args[));
yyconflicts += 1;
}
break;
}
else
- YYCHK (yyglrReduce (yystackp, yyk, -yyaction, yyfalse]b4_user_args[));
+ YYCHK (yyglrReduce (yystackp, yyk, -yyaction,
+ yyfalse]b4_user_args[));
}
}
return yyok;
}
/*ARGSUSED*/ static void
-yyreportSyntaxError (yyGLRStack* yystackp,
- YYSTYPE* yylvalp, YYLTYPE* yyllocp]b4_user_formals[)
+yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
{
- YYUSE (yylvalp);
- YYUSE (yyllocp);
-
if (yystackp->yyerrState == 0)
{
#if YYERROR_VERBOSE
}
}
-/* Recover from a syntax error on YYSTACK, assuming that YYTOKENP,
- YYLVALP, and YYLLOCP point to the syntactic category, semantic
- value, and location of the look-ahead. */
+/* 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. */
/*ARGSUSED*/ static void
-yyrecoverSyntaxError (yyGLRStack* yystackp,
- YYSTYPE* yylvalp,
- YYLTYPE* YYOPTIONAL_LOC (yyllocp)
- ]b4_user_formals[)
+yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
{
yySymbol* const yytokenp = yystackp->yytokenp;
size_t yyk;
if (*yytokenp != YYEMPTY)
{]b4_location_if([[
/* We throw away the lookahead, but the error range
- of the shifted error token must take it into account. */
+ of the shifted error token must take it into account. */
yyGLRState *yys = yystackp->yytops.yystates[0];
yyGLRStackItem yyerror_range[3];
yyerror_range[1].yystate.yyloc = yys->yyloc;
- yyerror_range[2].yystate.yyloc = *yyllocp;
+ yyerror_range[2].yystate.yyloc = yylloc;
YYLLOC_DEFAULT (yys->yyloc, yyerror_range, 2);]])[
yydestruct ("Error: discarding",
- *yytokenp, yylvalp]b4_location_if([, yyllocp])[]b4_user_args[);
+ *yytokenp, &yylval]b4_location_if([, &yylloc])[]b4_user_args[);
}
YYDPRINTF ((stderr, "Reading a token: "));
yychar = YYLEX;
*yytokenp = YYTRANSLATE (yychar);
- YY_SYMBOL_PRINT ("Next token is", *yytokenp, yylvalp, yyllocp);
+ YY_SYMBOL_PRINT ("Next token is", *yytokenp, &yylval, &yylloc);
yyj = yypact[yystackp->yytops.yystates[0]->yylrState];
if (yyis_pact_ninf (yyj))
return;
yyremoveDeletes (yystackp);
yycompressStack (yystackp);
- /* Now pop stack until we find a state that shifts the error token. */
+ /* Now pop stack until we find a state that shifts the error token. */
yystackp->yyerrState = 3;
while (yystackp->yytops.yystates[0] != NULL)
{
{
/* Shift the error token having adjusted its location. */
YYLTYPE yyerrloc;]b4_location_if([[
- yystackp->yyerror_range[2].yystate.yyloc = *yyllocp;
+ yystackp->yyerror_range[2].yystate.yyloc = yylloc;
YYLLOC_DEFAULT (yyerrloc, yystackp->yyerror_range, 2);]])[
YY_SYMBOL_PRINT ("Shifting", yystos[yytable[yyj]],
- yylvalp, &yyerrloc);
+ &yylval, &yyerrloc);
yyglrShift (yystackp, 0, yytable[yyj],
- yys->yyposn, yylvalp, &yyerrloc);
+ yys->yyposn, &yylval, &yyerrloc);
yys = yystackp->yytops.yystates[0];
break;
}
int yyresult;
yySymbol yytoken;
yyGLRStack yystack;
+ yyGLRStack* const yystackp = &yystack;
size_t yyposn;
-]b4_pure_if(
-[
- YYSTYPE yylval;
- YYLTYPE yylloc;
- #undef yychar
- #define yychar (yystack.yyrawchar)
-])[
-
- YYSTYPE* const yylvalp = &yylval;
- YYLTYPE* const yyllocp = &yylloc;
YYDPRINTF ((stderr, "Starting parse\n"));
+ yychar = YYEMPTY;
yytoken = YYEMPTY;
yylval = yyval_default;
]b4_location_if([
m4_ifdef([b4_initial_action], [
m4_pushdef([b4_at_dollar], [yylloc])dnl
m4_pushdef([b4_dollar_dollar], [yylval])dnl
- /* User initialization code. */
+ /* User initialization code. */
b4_initial_action
m4_popdef([b4_dollar_dollar])dnl
m4_popdef([b4_at_dollar])dnl
/* Line __line__ of glr.c. */
b4_syncline([@oline@], [@ofile@])])dnl
[
- if (! yyinitGLRStack (&yystack, YYINITDEPTH))
+ if (! yyinitGLRStack (yystackp, YYINITDEPTH))
goto yyexhaustedlab;
switch (YYSETJMP (yystack.yyexception_buffer))
{
yyrule = yydefaultAction (yystate);
if (yyrule == 0)
{
-]b4_location_if([[ yystack.yyerror_range[1].yystate.yyloc = *yyllocp;]])[
- yyreportSyntaxError (&yystack, yylvalp, yyllocp]b4_user_args[);
+]b4_location_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
+ yyreportSyntaxError (&yystack]b4_user_args[);
goto yyuser_error;
}
YYCHK1 (yyglrReduce (&yystack, 0, yyrule, yytrue]b4_user_args[));
YYDPRINTF ((stderr, "Reading a token: "));
yychar = YYLEX;
yytoken = YYTRANSLATE (yychar);
- YY_SYMBOL_PRINT ("Next token is", yytoken, yylvalp, yyllocp);
+ YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
}
yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts);
if (*yyconflicts != 0)
break;
if (yyisShiftAction (yyaction))
{
- YY_SYMBOL_PRINT ("Shifting", yytoken, yylvalp, yyllocp);
+ YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
if (yytoken != YYEOF)
- yytoken = YYEMPTY;
+ {
+ yychar = YYEMPTY;
+ yytoken = YYEMPTY;
+ }
yyposn += 1;
- yyglrShift (&yystack, 0, yyaction, yyposn, yylvalp, yyllocp);
+ yyglrShift (&yystack, 0, yyaction, yyposn, &yylval, &yylloc);
if (0 < yystack.yyerrState)
yystack.yyerrState -= 1;
}
else if (yyisErrorAction (yyaction))
{
-]b4_location_if([[ yystack.yyerror_range[1].yystate.yyloc = *yyllocp;]])[
- yyreportSyntaxError (&yystack, yylvalp, yyllocp]b4_user_args[);
+]b4_location_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
+ yyreportSyntaxError (&yystack]b4_user_args[);
goto yyuser_error;
}
else
size_t yys;
size_t yyn = yystack.yytops.yysize;
+ for (yys = 0; yys < yyn; yys += 1)
+ yystackp->yytops.yylookaheadNeeds[yys] = yychar != YYEMPTY;
+
/* yyprocessOneStack returns one of three things:
- An error flag. If the caller is yyprocessOneStack, it
on yylval in the event of memory exhaustion. */
for (yys = 0; yys < yyn; yys += 1)
- YYCHK1 (yyprocessOneStack (&yystack, yys, yyposn,
- yylvalp, yyllocp]b4_lpure_args[));
+ YYCHK1 (yyprocessOneStack (&yystack, yys, yyposn]b4_lpure_args[));
yyremoveDeletes (&yystack);
yyn = yystack.yytops.yysize;
before the loop to make sure the user destructor for yylval isn't
called twice. */
yytoken_to_shift = yytoken;
+ yychar = YYEMPTY;
yytoken = YYEMPTY;
yyposn += 1;
for (yys = 0; yys < yyn; yys += 1)
&yyconflicts);
/* Note that yyconflicts were handled by yyprocessOneStack. */
YYDPRINTF ((stderr, "On stack %lu, ", (unsigned long int) yys));
- YY_SYMBOL_PRINT ("shifting", yytoken_to_shift, yylvalp, yyllocp);
+ YY_SYMBOL_PRINT ("shifting", yytoken_to_shift, &yylval, &yylloc);
yyglrShift (&yystack, yys, yyaction, yyposn,
- yylvalp, yyllocp);
+ &yylval, &yylloc);
YYDPRINTF ((stderr, "Stack %lu now in state #%d\n",
(unsigned long int) yys,
yystack.yytops.yystates[yys]->yylrState));
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 = *yyllocp;]])[
- yyreportSyntaxError (&yystack, yylvalp, yyllocp]b4_user_args[);
+]b4_location_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
+ yyreportSyntaxError (&yystack]b4_user_args[);
goto yyuser_error;
}
else if (yystack.yytops.yysize == 1)
}
continue;
yyuser_error:
- yyrecoverSyntaxError (&yystack, yylvalp, yyllocp]b4_user_args[);
+ yyrecoverSyntaxError (&yystack]b4_user_args[);
yyposn = yystack.yytops.yystates[0]->yyposn;
}
yyreturn:
if (yytoken != YYEOF && yytoken != YYEMPTY)
yydestruct ("Cleanup: discarding lookahead",
- yytoken, yylvalp]b4_location_if([, yyllocp])[]b4_user_args[);
+ yytoken, &yylval]b4_location_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
m4_if(b4_defines_flag, 0, [],
[@output @output_header_name@
b4_copyright([Skeleton parser for GLR parsing with Bison],
- [2002, 2003, 2004, 2005])[
-
-/* As a special exception, when this parser skeleton is copied by
- Bison into a Bison output file, you may use that output file
- without restriction. This special exception was added by the Free
- Software Foundation for C GLR parsers in version 2.2 of Bison. */
+ [2002, 2003, 2004, 2005, 2006])[
/* C GLR parser skeleton written by Paul Hilfinger. */
]
projects / bison.git / blobdiff