-m4_divert(-1) -*- YYC -*-
+m4_divert(-1) -*- C -*-
+m4_include([c.m4])
-# b4_sint_type(MAX)
-# -----------------
-# Return the smallest signed int type able to handle the number MAX.
-m4_define([b4_sint_type],
-[m4_if(m4_eval([$1 <= 127]), [1], [signed char],
- m4_eval([$1 <= 32767]), [1], [signed short],
- [signed int])])
+# GLR skeleton for Bison
+# Copyright (C) 2002 Free Software Foundation, Inc.
-# b4_uint_type(MAX)
-# -----------------
-# Return the smallest unsigned int type able to handle the number MAX.
-m4_define([b4_uint_type],
-[m4_if(m4_eval([$1 <= 255]), [1], [unsigned char],
- m4_eval([$1 <= 65535]), [1], [unsigned short],
- [unsigned int])])
+# 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
+# (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., 59 Temple Place, Suite 330, Boston, MA
+# 02111-1307 USA
# b4_lhs_value([TYPE])
# --------------------
[[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]], [_])])
-## ------------------------- ##
-## Assigning token numbers. ##
-## ------------------------- ##
-
-# b4_token_define(TOKEN-NAME, TOKEN-NUMBER)
-# -----------------------------------------
-# Output the definition of this token as #define.
-m4_define([b4_token_define],
-[#define $1 $2
-])
-
-
-# b4_token_enum(TOKEN-NAME, TOKEN-NUMBER)
-# ---------------------------------------
-# Output the definition of this token as an enum.
-m4_define([b4_token_enum],
-[$1 = $2])
-
-
-# b4_token_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
-# -------------------------------------------------------
-# Output the definition of the tokens (if there are) as enums and #define.
-m4_define([b4_token_defines],
-[m4_if([$@], [[]], [],
-[/* Tokens. */
-#ifndef YYTOKENTYPE
-# if defined (__STDC__) || defined (__cplusplus)
- /* Put the tokens into the symbol table, so that GDB and other debuggers
- know about them. */
- enum yytokentype {
-m4_map_sep([ b4_token_enum], [,
-],
- [$@])
- };
-# endif
- /* POSIX requires `int' for tokens in interfaces. */
-# define YYTOKENTYPE int
-#endif /* !YYTOKENTYPE */
-m4_map([b4_token_define], [$@])
-])
-])
-
-
m4_divert(0)dnl
#output "b4_output_parser_name"
-[/* Skeleton parser for GLR parsing with Bison,
- Copyright (C) 2002 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, 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., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
-/* As a special exception, when this file 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
- in version 1.24 of Bison. */
-
+b4_copyright([Skeleton parser for GLR parsing with Bison], [2002])
+[
/* This is the parser code for GLR (Generalized LR) parser. */
/* FIXME: minimize these */
-#include <stdlib.h>
+#include <assert.h>
#include <setjmp.h>
-#include <stdio.h>
#include <stdarg.h>
-#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
/* Identify Bison output. */
#define YYBISON 1
#define yynerrs b4_prefix[]nerrs
b4_location_if([#define yylloc b4_prefix[]lloc])])
-/* Copy the first part of user declarations. */
-b4_pre_prologue
+b4_token_defines(b4_tokens)
-b4_token_defines(b4_tokens)[
+/* Copy the first part of user declarations. */
+b4_pre_prologue[
/* Enabling traces. */
#ifndef YYDEBUG
typedef struct yyltype
{
]b4_location_if([
- int yyfirst_line;
- int yyfirst_column;
- int yylast_line;
- int yylast_column;])[
+ int first_line;
+ int first_column;
+ int last_line;
+ int last_column;])[
} yyltype;
# define YYLTYPE ]b4_ltype[
# define YYLTYPE_IS_TRIVIAL 1
#endif
/* Default (constant) values used for initialization for null
- right-hand sides. Unlike the standard bison.simple template,
+ right-hand sides. Unlike the standard bison.simple template,
here we set the default values of the $$ and $@ to zeroed-out
values. Since the default value of these quantities is undefined,
this behavior is technically correct. */
# define yyfalse 0
#endif
-#if ! defined (yy__GNUC__)
-# define inline
+/*-----------------.
+| GCC extensions. |
+`-----------------*/
+
+#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__
+# define __attribute__(Spec) /* empty */
+# endif
+#endif
+
+#ifndef ATTRIBUTE_UNUSED
+# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
+#endif
+
+#if ! defined (__GNUC__)
+# define inline
#endif
/* YYFINAL -- State number of the termination state. */
-#define YYFINAL ]b4_final[
+#define YYFINAL ]b4_final_state_number[
#define YYFLAG ]b4_flag[
#define YYLAST ]b4_last[
/* YYNTOKENS -- Number of terminals. */
-#define YYNTOKENS ]b4_ntokens[
+#define YYNTOKENS ]b4_tokens_number[
/* YYNNTS -- Number of nonterminals. */
-#define YYNNTS ]b4_nnts[
+#define YYNNTS ]b4_nterms_number[
/* YYNRULES -- Number of rules. */
-#define YYNRULES ]b4_nrules[
+#define YYNRULES ]b4_rules_number[
/* YYNRULES -- Number of states. */
-#define YYNSTATES ]b4_nstates[
+#define YYNSTATES ]b4_states_number[
/* YYMAXRHS -- Maximum number of symbols on right-hand side of rule. */
#define YYMAXRHS ]b4_r2_max[
((unsigned)(YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
/* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX. */
-static const ]b4_uint_type(b4_translate_max)[ yytranslate[] =
+static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
{
]b4_translate[
};
#if YYDEBUG
/* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
YYRHS. */
-static const ]b4_uint_type(b4_prhs_max)[ yyprhs[] =
+static const ]b4_int_type_for([b4_prhs])[ yyprhs[] =
{
]b4_prhs[
};
/* YYRHS -- A `-1'-separated list of the rules' RHS. */
-static const ]b4_sint_type(b4_rhs_max)[ yyrhs[] =
+static const ]b4_int_type_for([b4_rhs])[ yyrhs[] =
{
]b4_rhs[
};
/* YYRLINE[YYN] -- source line where rule number YYN was defined. */
-static const ]b4_uint_type(b4_rline_max)[ yyrline[] =
+static const ]b4_int_type_for([b4_rline])[ yyrline[] =
{
]b4_rline[
};
]b4_tname[
};
-#define yytname_size (sizeof (yytname) / sizeof (yytname[0]))
+#define yytname_size ((int) (sizeof (yytname) / sizeof (yytname[0])))
#endif
/* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */
-static const ]b4_uint_type(b4_r1_max)[ yyr1[] =
+static const ]b4_int_type_for([b4_r1])[ yyr1[] =
{
]b4_r1[
};
/* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN. */
-static const ]b4_uint_type(b4_r2_max)[ yyr2[] =
+static const ]b4_int_type_for([b4_r2])[ yyr2[] =
{
]b4_r2[
};
/* YYDPREC[RULE-NUM] -- Dynamic precedence of rule #RULE-NUM (0 if none). */
-static const short yydprec[] =
+static const ]b4_int_type_for([b4_dprec])[ yydprec[] =
{
]b4_dprec[
};
/* YYMERGER[RULE-NUM] -- Index of merging function for rule #RULE-NUM. */
-static const short yymerger[] =
+static const ]b4_int_type_for([b4_merger])[ yymerger[] =
{
]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 short yydefact[] =
+static const ]b4_int_type_for([b4_defact])[ yydefact[] =
{
]b4_defact[
};
-/* YYPGOTO[NTERM-NUM]. */
-static const short yydefgoto[] =
+/* 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. */
-static const short yypact[] =
+#define YYPACT_NINF ]b4_pact_ninf[
+static const ]b4_int_type_for([b4_pact])[ yypact[] =
{
]b4_pact[
};
/* YYPGOTO[NTERM-NUM]. */
-static const short yypgoto[] =
+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. */
-static const short yytable[] =
+ number is the opposite. If zero, do what YYDEFACT says.
+ If YYTABLE_NINF, parse error. */
+#define YYTABLE_NINF ]b4_table_ninf[
+static const ]b4_int_type_for([b4_table])[ yytable[] =
{
]b4_table[
};
/* YYCONFLP[YYPACT[STATE-NUM]] -- pointer into yyconfl of start of list
of conflicting reductions corresponding to action entry for state
- STATE-NUM in yytable. 0 means no conflicts. The list in yyconfl
+ STATE-NUM in yytable. 0 means no conflicts. The list in yyconfl
is terminated by a rule number of 0. */
-static const short yyconflp[] =
+static const ]b4_int_type_for([b4_conflict_list_heads])[ yyconflp[] =
{
]b4_conflict_list_heads[
};
-/* YYCONFL[I] -- lists of conflicting rule numbers, each terminated
+/* YYCONFL[I] -- lists of conflicting rule numbers, each terminated
by 0, pointed into by YYCONFLP. */
-static const short yyconfl[] =
+]dnl Do not use b4_int_type_for here, since there are places where
+dnl pointers onto yyconfl are taken, which type is "short *".
+dnl We probably ought to introduce a type for confl.
+[static const short yyconfl[] =
{
]b4_conflicting_rules[
};
-static const short yycheck[] =
+static const ]b4_int_type_for([b4_check])[ yycheck[] =
{
]b4_check[
};
#define YYRHSLOC(yyRhs,YYK) (yyRhs[YYK].yystate.yyloc)
#ifndef YYLLOC_DEFAULT
-# define YYLLOC_DEFAULT(yyCurrent, yyRhs, YYN) \
- yyCurrent.yyfirst_line = YYRHSLOC(yyRhs,1).yyfirst_line; \
- yyCurrent.yyfirst_column = YYRHSLOC(yyRhs,1).yyfirst_column; \
- yyCurrent.yylast_line = YYRHSLOC(yyRhs,YYN).yylast_line; \
- yyCurrent.yylast_column = YYRHSLOC(yyRhs,YYN).yylast_column;
+# define YYLLOC_DEFAULT(yyCurrent, yyRhs, YYN) \
+ yyCurrent.first_line = YYRHSLOC(yyRhs,1).first_line; \
+ yyCurrent.first_column = YYRHSLOC(yyRhs,1).first_column; \
+ yyCurrent.last_line = YYRHSLOC(yyRhs,YYN).last_line; \
+ yyCurrent.last_column = YYRHSLOC(yyRhs,YYN).last_column;
#endif
/* YYLEX -- calling `yylex' with the right arguments. */
multiple parsers can coexist. */
int yydebug;
#else /* !YYDEBUG */
-# define YYDPRINTF(Args)
+ /* Avoid empty `if' bodies. */
+# define YYDPRINTF(Args) {}
#endif /* !YYDEBUG */
/* YYINITDEPTH -- initial size of the parser's stacks. */
if the built-in stack extension method is used).
Do not make this value too large; the results are undefined if
- SIZE_MAX < YYMAXDEPTH * sizeof (GLRStackItem)
+ SIZE_MAX < YYMAXDEPTH * sizeof (GLRStackItem)
evaluated with infinite-precision integer arithmetic. */
#if YYMAXDEPTH == 0
#endif
/* Minimum number of free items on the stack allowed after an
- allocation. This is to allow allocation and initialization
- to be completed by functions that call expandGLRStack before the
- stack is expanded, thus insuring that all necessary pointers get
+ allocation. This is to allow allocation and initialization
+ to be completed by functions that call expandGLRStack before the
+ stack is expanded, thus insuring that all necessary pointers get
properly redirected to new data. */
#define YYHEADROOM 2
typedef struct yyGLRStateSet yyGLRStateSet;
struct yyGLRState {
- bool yyisState;
+ bool yyisState;
bool yyresolved;
yyStateNum yylrState;
yyGLRState* yypred;
static void yyfreeGLRStack (yyGLRStack* yystack);
static void
-yyFail (yyGLRStack* yystack, const char* yyformat, ...)
+yyFail (yyGLRStack* yystack, const char* yyformat, ...)
{
if (yyformat != NULL)
{
#if YYDEBUG || YYERROR_VERBOSE
/** A printable representation of TOKEN. Valid until next call to
* tokenName. */
-static inline const char*
-yytokenName (yySymbol yytoken)
+static inline const char*
+yytokenName (yySymbol yytoken)
{
return yytname[yytoken];
}
* (@$). Returns yyok for normal return, yyaccept for YYACCEPT,
* yyerr for YYERROR, yyabort for YYABORT. */
static YYRESULTTAG
-yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp,
+yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp,
YYSTYPE* yyvalp, YYLTYPE* yylocp, yyGLRStack* yystack)
{
- if (yyrhslen == 0)
+ /* Avoid `unused' warnings in there are no $n. */
+ (void) yystack;
+
+ if (yyrhslen == 0)
{
*yyvalp = yyval_default;
*yylocp = yyloc_default;
}
- else
+ else
{
*yyvalp = yyvsp[1-yyrhslen].yystate.yysemantics.yysval;
*yylocp = yyvsp[1-yyrhslen].yystate.yyloc;
} while (0)
]
- switch (yyn)
+ switch (yyn)
{
b4_actions
}
yyuserMerge (int yyn, YYSTYPE* yy0, YYSTYPE* yy1)
{
YYSTYPE yyval = *yy0;
- switch (yyn)
+ /* `Use' the arguments. */
+ (void) yy0;
+ (void) yy1;
+
+ switch (yyn)
{
b4_mergers
}
/** Number of symbols composing the right hand side of rule #RULE. */
static inline int
-yyrhsLength (yyRuleNum yyrule)
+yyrhsLength (yyRuleNum yyrule)
{
return yyr2[yyrule];
}
/** Left-hand-side symbol for rule #RULE. */
static inline yySymbol
-yylhsNonterm (yyRuleNum yyrule)
+yylhsNonterm (yyRuleNum yyrule)
{
return yyr1[yyrule];
}
static inline bool
yyisDefaultedState (yyStateNum yystate)
{
- return yypact[yystate] == YYFLAG;
+ return yypact[yystate] == YYPACT_NINF;
}
-
+
/** The default reduction for STATE, assuming it has one. */
static inline yyRuleNum
yydefaultAction (yyStateNum yystate)
return yydefact[yystate];
}
-/** Set *ACTION to the action to take in STATE on seeing TOKEN.
+/** 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
+ * R > 0: Shift to state R.
+ * Set *CONFLICTS to a pointer into yyconfl to 0-terminated list of
* conflicting reductions.
*/
static inline void
-yygetLRActions (yyStateNum yystate, int yytoken,
+yygetLRActions (yyStateNum yystate, int yytoken,
int* yyaction, const short** yyconflicts)
{
int yyindex = yypact[yystate] + yytoken;
- if (yyindex < 0 || yyindex > YYLAST || yycheck[yyindex] != yytoken)
+ if (yyindex < 0 || YYLAST < yyindex || yycheck[yyindex] != yytoken)
{
*yyaction = -yydefact[yystate];
*yyconflicts = yyconfl;
}
- else
+ else if (yytable[yyindex] != YYTABLE_NINF)
{
*yyaction = yytable[yyindex];
*yyconflicts = yyconfl + yyconflp[yyindex];
}
+ else
+ {
+ *yyaction = 0;
+ *yyconflicts = yyconfl + yyconflp[yyindex];
+ }
}
static inline yyStateNum
{
int yyr;
yyr = yypgoto[yylhs - YYNTOKENS] + yystate;
- if (yyr >= 0 && yyr <= YYLAST && yycheck[yyr] == yystate)
+ if (0 <= yyr && yyr <= YYLAST && yycheck[yyr] == yystate)
return yytable[yyr];
else
return yydefgoto[yylhs - YYNTOKENS];
}
static inline bool
-yyisShiftAction (int yyaction)
+yyisShiftAction (int yyaction)
{
return yyaction > 0;
}
static inline bool
-yyisErrorAction (int yyaction)
+yyisErrorAction (int yyaction)
{
- return yyaction == 0 || yyaction == YYFLAG;
+ return yyaction == 0;
}
/* GLRStates */
/** True iff the semantic value of the edge leading to STATE is
* resolved. */
static inline bool
-yyhasResolvedValue (yyGLRState* yystate)
+yyhasResolvedValue (yyGLRState* yystate)
{
return yystate->yyresolved;
}
-void yyaddDeferredAction (yyGLRStack* yystack, yyGLRState* yystate,
- yyGLRState* yyrhs, yyRuleNum yyrule)
+static void
+yyaddDeferredAction (yyGLRStack* yystack, yyGLRState* yystate,
+ yyGLRState* yyrhs, yyRuleNum yyrule)
{
yySemanticOption* yynewItem;
yynewItem = &yystack->yynextFree->yyoption;
yystack->yynextFree += 1;
yynewItem->yyisState = yyfalse;
yynewItem->yystate = yyrhs;
- yynewItem->yyrule = yyrule;
+ yynewItem->yyrule = yyrule;
yynewItem->yynext = yystate->yysemantics.yyfirstVal;
yystate->yysemantics.yyfirstVal = yynewItem;
if (yystack->yyspaceLeft < YYHEADROOM)
yyset->yystates[0] = NULL;
}
-static void yyfreeStateSet (yyGLRStateSet* yyset)
+static void yyfreeStateSet (yyGLRStateSet* yyset)
{
free (yyset->yystates);
}
yystack->yyerrState = 0;
yynerrs = 0;
yystack->yyspaceLeft = yysize;
- yystack->yynextFree = yystack->yyitems =
+ yystack->yynextFree = yystack->yyitems =
(yyGLRStackItem*) malloc (yysize * sizeof (yystack->yynextFree[0]));
yystack->yysplitPoint = NULL;
yystack->yylastDeleted = NULL;
allocation, so that we can avoid having external pointers exist
across an allocation. */
static void
-yyexpandGLRStack (yyGLRStack* yystack)
+yyexpandGLRStack (yyGLRStack* yystack)
{
#if YYSTACKEXPANDABLE
yyGLRStack yynewStack;
if (yynewSize > YYMAXDEPTH)
yynewSize = YYMAXDEPTH;
yyinitGLRStack (&yynewStack, yynewSize);
- for (yyp0 = yystack->yyitems, yyp1 = yynewStack.yyitems, yyn = yysize;
+ for (yyp0 = yystack->yyitems, yyp1 = yynewStack.yyitems, yyn = yysize;
yyn > 0;
- yyn -= 1, yyp0 += 1, yyp1 += 1)
+ yyn -= 1, yyp0 += 1, yyp1 += 1)
{
*yyp1 = *yyp0;
- if (*(bool*) yyp0)
- {
+ if (*(bool*) yyp0)
+ {
yyGLRState* yys0 = &yyp0->yystate;
yyGLRState* yys1 = &yyp1->yystate;
- if (yys0->yypred != NULL)
- yys1->yypred =
+ if (yys0->yypred != NULL)
+ yys1->yypred =
YYRELOC (yyp0, yyp1, yys0->yypred, yystate);
if (! yys0->yyresolved && yys0->yysemantics.yyfirstVal != NULL)
- yys1->yysemantics.yyfirstVal =
+ yys1->yysemantics.yyfirstVal =
YYRELOC(yyp0, yyp1, yys0->yysemantics.yyfirstVal, yyoption);
}
- else
+ else
{
yySemanticOption* yyv0 = &yyp0->yyoption;
yySemanticOption* yyv1 = &yyp1->yyoption;
}
}
if (yystack->yysplitPoint != NULL)
- yystack->yysplitPoint = YYRELOC (yystack->yyitems, yynewStack.yyitems,
+ yystack->yysplitPoint = YYRELOC (yystack->yyitems, yynewStack.yyitems,
yystack->yysplitPoint, yystate);
-
- for (yyn = 0; yyn < yystack->yytops.yysize; yyn += 1)
+
+ for (yyn = 0; yyn < yystack->yytops.yysize; yyn += 1)
if (yystack->yytops.yystates[yyn] != NULL)
- yystack->yytops.yystates[yyn] =
- YYRELOC (yystack->yyitems, yynewStack.yyitems,
+ yystack->yytops.yystates[yyn] =
+ YYRELOC (yystack->yyitems, yynewStack.yyitems,
yystack->yytops.yystates[yyn], yystate);
free (yystack->yyitems);
yystack->yyitems = yynewStack.yyitems;
yystack->yyspaceLeft = yynewStack.yyspaceLeft - yysize;
#else
-
+
yyFail (yystack, "parsing stack overflow (%d items)", yysize);
-#endif
+#endif
}
static void
-yyfreeGLRStack (yyGLRStack* yystack)
+yyfreeGLRStack (yyGLRStack* yystack)
{
free (yystack->yyitems);
yyfreeStateSet (&yystack->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
+ * splitpoint of STACK, if needed, so that it is at least as deep as
* S. */
static inline void
-yyupdateSplit (yyGLRStack* yystack, yyGLRState* yys)
+yyupdateSplit (yyGLRStack* yystack, yyGLRState* yys)
{
- if (yystack->yysplitPoint != NULL && yystack->yysplitPoint > yys)
+ if (yystack->yysplitPoint != NULL && yystack->yysplitPoint > yys)
yystack->yysplitPoint = yys;
}
/** Invalidate stack #K in STACK. */
static inline void
-yymarkStackDeleted (yyGLRStack* yystack, int yyk)
+yymarkStackDeleted (yyGLRStack* yystack, int yyk)
{
if (yystack->yytops.yystates[yyk] != NULL)
yystack->yylastDeleted = yystack->yytops.yystates[yyk];
yystack->yytops.yystates[yyk] = NULL;
}
-/** Undelete the last stack that was marked as deleted. Can only be
+/** 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. */
static void
{
if (yystack->yylastDeleted == NULL || yystack->yytops.yysize != 0)
return;
- yystack->yytops.yystates[0] = yystack->yylastDeleted;
+ yystack->yytops.yystates[0] = yystack->yylastDeleted;
yystack->yytops.yysize = 1;
YYDPRINTF ((stderr, "Restoring last deleted stack as stack #0.\n"));
yystack->yylastDeleted = NULL;
static inline void
yyremoveDeletes (yyGLRStack* yystack)
{
- int yyi, yyj;
+ size_t yyi, yyj;
yyi = yyj = 0;
- while (yyj < yystack->yytops.yysize)
+ while (yyj < yystack->yytops.yysize)
{
if (yystack->yytops.yystates[yyi] == NULL)
{
- if (YYDEBUG && yyi == yyj)
+ if (yyi == yyj)
YYDPRINTF ((stderr, "Removing dead stacks.\n"));
yystack->yytops.yysize -= 1;
}
- else
+ else
{
yystack->yytops.yystates[yyj] = yystack->yytops.yystates[yyi];
if (yyj != yyi)
}
}
-/** Shift to a new state on stack #K of STACK, corresponding to LR state
+/** Shift to a new state on stack #K of STACK, corresponding to LR state
* LRSTATE, at input position POSN, with (resolved) semantic value SVAL. */
static inline void
-yyglrShift (yyGLRStack* yystack, int yyk, yyStateNum yylrState, size_t yyposn,
- YYSTYPE yysval, YYLTYPE* yylocp)
+yyglrShift (yyGLRStack* yystack, int yyk, yyStateNum yylrState, size_t yyposn,
+ YYSTYPE yysval, YYLTYPE* yylocp)
{
yyGLRStackItem* yynewItem;
* corresponding to LR state LRSTATE, at input position POSN, with
* the (unresolved) semantic value of RHS under the action for RULE. */
static inline void
-yyglrShiftDefer (yyGLRStack* yystack, int yyk, yyStateNum yylrState,
+yyglrShiftDefer (yyGLRStack* yystack, int yyk, yyStateNum yylrState,
size_t yyposn, yyGLRState* yyrhs, yyRuleNum yyrule)
{
yyGLRStackItem* yynewItem;
}
/** 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
+ * #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,
* and *LOCP to the computed location (if any). Return value is as
* for userAction. */
{
int yynrhs = yyrhsLength (yyrule);
- if (yystack->yysplitPoint == NULL)
+ if (yystack->yysplitPoint == NULL)
{
/* Standard special case: single stack. */
yyGLRStackItem* yyrhs = (yyGLRStackItem*) yystack->yytops.yystates[yyk];
yystack->yynextFree -= yynrhs;
yystack->yyspaceLeft += yynrhs;
yystack->yytops.yystates[0] = & yystack->yynextFree[-1].yystate;
- if (yynrhs == 0)
+ if (yynrhs == 0)
{
*yyvalp = yyval_default;
*yylocp = yyloc_default;
}
- else
+ else
{
*yyvalp = yyrhs[1-yynrhs].yystate.yysemantics.yysval;
*yylocp = yyrhs[1-yynrhs].yystate.yyloc;
}
return yyuserAction (yyrule, yynrhs, yyrhs, yyvalp, yylocp, yystack);
}
- else
+ else
{
int yyi;
yyGLRState* yys;
yyGLRStackItem yyrhsVals[YYMAXRHS];
- for (yyi = yynrhs-1, yys = yystack->yytops.yystates[yyk]; yyi >= 0;
- yyi -= 1, yys = yys->yypred)
+ for (yyi = yynrhs-1, yys = yystack->yytops.yystates[yyk]; yyi >= 0;
+ yyi -= 1, yys = yys->yypred)
{
assert (yys->yypred != NULL);
yyrhsVals[yyi].yystate.yyresolved = yytrue;
}
yyupdateSplit (yystack, yys);
yystack->yytops.yystates[yyk] = yys;
- if (yynrhs == 0)
+ if (yynrhs == 0)
{
*yyvalp = yyval_default;
*yylocp = yyloc_default;
}
- else
+ else
{
*yyvalp = yyrhsVals[0].yystate.yysemantics.yysval;
*yylocp = yyrhsVals[0].yystate.yyloc;
}
- return yyuserAction (yyrule, yynrhs, yyrhsVals + (yynrhs-1),
+ return yyuserAction (yyrule, yynrhs, yyrhsVals + (yynrhs-1),
yyvalp, yylocp, yystack);
}
}
/** Pop items off stack #K of STACK according to grammar rule RULE,
* and push back on the resulting nonterminal symbol. Perform the
- * semantic action associated with RULE and store its value with the
+ * semantic action associated with RULE and store its value with the
* newly pushed state, if FORCEEVAL or if STACK 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
- * added to the options for the existing state's semantic value.
+ * it is identified with that existing state, eliminating stack #K from
+ * 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
-yyglrReduce (yyGLRStack* yystack, int yyk, yyRuleNum yyrule, bool yyforceEval)
+yyglrReduce (yyGLRStack* yystack, size_t yyk, yyRuleNum yyrule,
+ bool yyforceEval)
{
- int yyposn = yystack->yytops.yystates[yyk]->yyposn;
+ size_t yyposn = yystack->yytops.yystates[yyk]->yyposn;
- if (yyforceEval || yystack->yysplitPoint == NULL)
+ if (yyforceEval || yystack->yysplitPoint == NULL)
{
YYSTYPE yysval;
YYLTYPE yyloc;
-
+
+#if YYDEBUG
+ if (yydebug)
+ {
+ int yyi;
+ YYDPRINTF ((stderr, "Reducing stack %d by rule %d (line %d),",
+ yyk, yyrule - 1, yyrline[yyrule]));
+ /* Print the symbols being reduced, and their result. */
+ for (yyi = yyprhs[yyrule]; yyrhs[yyi] >= 0; yyi++)
+ YYFPRINTF (stderr, "%s ", yytokenName (yyrhs[yyi]));
+ YYFPRINTF (stderr, " -> %s\n", yytokenName (yyr1[yyrule]));
+ }
+#endif
YYCHK (yydoAction (yystack, yyk, yyrule, &yysval, &yyloc));
- yyglrShift (yystack, yyk,
- yyLRgotoState (yystack->yytops.yystates[yyk]->yylrState,
+ yyglrShift (yystack, yyk,
+ yyLRgotoState (yystack->yytops.yystates[yyk]->yylrState,
yylhsNonterm (yyrule)),
yyposn, yysval, &yyloc);
- YYDPRINTF ((stderr, "Reduced stack %d by rule #%d. Now in state %d.\n",
- yyk, yyrule-1, yystack->yytops.yystates[yyk]->yylrState));
+ YYDPRINTF ((stderr, "Stack %d entering state %d\n",
+ yyk, yystack->yytops.yystates[yyk]->yylrState));
}
- else
+ else
{
- int yyi, yyn;
+ size_t yyi;
+ int yyn;
yyGLRState* yys, *yys0 = yystack->yytops.yystates[yyk];
yyStateNum yynewLRState;
- for (yys = yystack->yytops.yystates[yyk], yyn = yyrhsLength (yyrule);
- yyn > 0; yyn -= 1)
+ for (yys = yystack->yytops.yystates[yyk], yyn = yyrhsLength (yyrule);
+ yyn > 0; yyn -= 1)
{
yys = yys->yypred;
assert (yys != NULL);
}
yyupdateSplit (yystack, yys);
yynewLRState = yyLRgotoState (yys->yylrState, yylhsNonterm (yyrule));
- YYDPRINTF ((stderr,
+ YYDPRINTF ((stderr,
"Reduced stack %d by rule #%d; action deferred. "
"Now in state %d.\n",
yyk, yyrule-1, yynewLRState));
for (yyi = 0; yyi < yystack->yytops.yysize; yyi += 1)
- if (yyi != yyk && yystack->yytops.yystates[yyi] != NULL)
+ if (yyi != yyk && yystack->yytops.yystates[yyi] != NULL)
{
yyGLRState* yyp, *yysplit = yystack->yysplitPoint;
yyp = yystack->yytops.yystates[yyi];
- while (yyp != yys && yyp != yysplit && yyp->yyposn >= yyposn)
+ while (yyp != yys && yyp != yysplit && yyp->yyposn >= yyposn)
{
- if (yyp->yylrState == yynewLRState && yyp->yypred == yys)
+ if (yyp->yylrState == yynewLRState && yyp->yypred == yys)
{
yyaddDeferredAction (yystack, yyp, yys0, yyrule);
yymarkStackDeleted (yystack, yyk);
}
yystack->yytops.yystates[yyk] = yys;
yyglrShiftDefer (yystack, yyk, yynewLRState, yyposn, yys0, yyrule);
- }
+ }
return 0;
}
static int
yysplitStack (yyGLRStack* yystack, int yyk)
{
- if (yystack->yysplitPoint == NULL)
+ if (yystack->yysplitPoint == NULL)
{
assert (yyk == 0);
yystack->yysplitPoint = yystack->yytops.yystates[yyk];
}
- if (yystack->yytops.yysize >= yystack->yytops.yycapacity)
+ if (yystack->yytops.yysize >= yystack->yytops.yycapacity)
{
yystack->yytops.yycapacity *= 2;
- yystack->yytops.yystates =
- (yyGLRState**) realloc (yystack->yytops.yystates,
- yystack->yytops.yycapacity
+ yystack->yytops.yystates =
+ (yyGLRState**) realloc (yystack->yytops.yystates,
+ yystack->yytops.yycapacity
* sizeof (yyGLRState*));
}
- yystack->yytops.yystates[yystack->yytops.yysize]
+ yystack->yytops.yystates[yystack->yytops.yysize]
= yystack->yytops.yystates[yyk];
yystack->yytops.yysize += 1;
return yystack->yytops.yysize-1;
static bool
yyidenticalOptions (yySemanticOption* yyy0, yySemanticOption* yyy1)
{
- if (yyy0->yyrule == yyy1->yyrule)
+ if (yyy0->yyrule == yyy1->yyrule)
{
yyGLRState *yys0, *yys1;
int yyn;
- for (yys0 = yyy0->yystate, yys1 = yyy1->yystate,
+ for (yys0 = yyy0->yystate, yys1 = yyy1->yystate,
yyn = yyrhsLength (yyy0->yyrule);
yyn > 0;
yys0 = yys0->yypred, yys1 = yys1->yypred, yyn -= 1)
}
/** Assuming identicalOptions (Y0,Y1), (destructively) merge the
- * alternative semantic values for the RHS-symbols of Y1 into the
+ * alternative semantic values for the RHS-symbols of Y1 into the
* corresponding semantic value sets of the symbols of Y0. */
static void
yymergeOptionSets (yySemanticOption* yyy0, yySemanticOption* yyy1)
{
yyGLRState *yys0, *yys1;
int yyn;
- for (yys0 = yyy0->yystate, yys1 = yyy1->yystate,
+ for (yys0 = yyy0->yystate, yys1 = yyy1->yystate,
yyn = yyrhsLength (yyy0->yyrule);
yyn > 0;
yys0 = yys0->yypred, yys1 = yys1->yypred, yyn -= 1)
if (yys0 == yys1)
break;
- else if (! yys0->yyresolved && ! yys1->yyresolved)
+ else if (! yys0->yyresolved && ! yys1->yyresolved)
{
yySemanticOption* yyz;
- for (yyz = yys0->yysemantics.yyfirstVal; yyz->yynext != NULL;
+ for (yyz = yys0->yysemantics.yyfirstVal; yyz->yynext != NULL;
yyz = yyz->yynext)
;
yyz->yynext = yys1->yysemantics.yyfirstVal;
* parsing state; return 0 if no combination is possible,
* 1 if user-mergeable, 2 if Y0 is preferred, 3 if Y1 is preferred. */
static int
-yypreference (yySemanticOption* yyy0, yySemanticOption* yyy1)
+yypreference (yySemanticOption* y0, yySemanticOption* y1)
{
- yyRuleNum yyr0 = yyy0->yyrule, yyr1 = yyy1->yyrule;
- int yyp0 = yydprec[yyr0], yyp1 = yydprec[yyr1];
+ yyRuleNum r0 = y0->yyrule, r1 = y1->yyrule;
+ int p0 = yydprec[r0], p1 = yydprec[r1];
- if (yyp0 == yyp1)
+ if (p0 == p1)
{
- if (yymerger[yyr0] == 0 || yymerger[yyr0] != yymerger[yyr1])
+ if (yymerger[r0] == 0 || yymerger[r0] != yymerger[r1])
return 0;
else
return 1;
}
- if (yyp0 == 0 || yyp1 == 0)
+ if (p0 == 0 || p1 == 0)
return 0;
- if (yyp0 < yyp1)
+ if (p0 < p1)
return 3;
- if (yyp0 > yyp1)
+ if (p0 > p1)
return 2;
return 0;
}
-static YYRESULTTAG yyresolveValue (yySemanticOption* yyoptionList,
- yyGLRStack* yystack, YYSTYPE* yyvalp,
+static YYRESULTTAG yyresolveValue (yySemanticOption* yyoptionList,
+ yyGLRStack* yystack, YYSTYPE* yyvalp,
YYLTYPE* yylocp);
static YYRESULTTAG
yyresolveStates (yyGLRState* yys, int yyn, yyGLRStack* yystack)
{
YYRESULTTAG yyflag;
- if (yyn > 0)
+ if (yyn > 0)
{
assert (yys->yypred != NULL);
yyflag = yyresolveStates (yys->yypred, yyn-1, yystack);
if (yyflag != yyok)
return yyflag;
- if (! yys->yyresolved)
+ if (! yys->yyresolved)
{
yyflag = yyresolveValue (yys->yysemantics.yyfirstVal, yystack,
&yys->yysemantics.yysval, &yys->yyloc);
}
static YYRESULTTAG
-yyresolveAction (yySemanticOption* yyopt, yyGLRStack* yystack,
+yyresolveAction (yySemanticOption* yyopt, yyGLRStack* yystack,
YYSTYPE* yyvalp, YYLTYPE* yylocp)
{
yyGLRStackItem yyrhsVals[YYMAXRHS];
yynrhs = yyrhsLength (yyopt->yyrule);
YYCHK (yyresolveStates (yyopt->yystate, yynrhs, yystack));
- for (yyi = yynrhs-1, yys = yyopt->yystate; yyi >= 0;
+ for (yyi = yynrhs-1, yys = yyopt->yystate; yyi >= 0;
yyi -= 1, yys = yys->yypred)
{
assert (yys->yypred != NULL);
yyrhsVals[yyi].yystate.yyresolved = yytrue;
yyrhsVals[yyi].yystate.yysemantics.yysval = yys->yysemantics.yysval;
yyrhsVals[yyi].yystate.yyloc = yys->yyloc;
- }
- return yyuserAction (yyopt->yyrule, yynrhs, yyrhsVals + (yynrhs-1),
+ }
+ return yyuserAction (yyopt->yyrule, yynrhs, yyrhsVals + (yynrhs-1),
yyvalp, yylocp, yystack);
}
#if YYDEBUG
-static yyGLRState YYLEFTMOST_STATE = { 0, NULL, -1, 0, { NULL } };
+static yyGLRState YYLEFTMOST_STATE = { 0, 0, -1, NULL, 0, { NULL } };
-static void yyreportTree (yySemanticOption* yyx, int yyindent)
+static void yyreportTree (yySemanticOption* yyx, int yyindent)
{
int yynrhs = yyrhsLength (yyx->yyrule);
int yyi;
if (yys->yyposn+1 > yyx->yystate->yyposn)
YYFPRINTF (stderr, "%*s%s -> <Rule %d, empty>\n",
- yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)),
+ yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)),
yyx->yyrule);
else
- YYFPRINTF (stderr, "%*s%s -> <Rule %d, tokens %d .. %d>\n",
+ YYFPRINTF (stderr, "%*s%s -> <Rule %d, tokens %d .. %d>\n",
yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)),
yyx->yyrule, yys->yyposn+1, yyx->yystate->yyposn);
- for (yyi = 1; yyi <= yynrhs; yyi += 1)
+ for (yyi = 1; yyi <= yynrhs; yyi += 1)
{
- if (yystates[yyi]->yyresolved)
+ if (yystates[yyi]->yyresolved)
{
if (yystates[yyi-1]->yyposn+1 > yystates[yyi]->yyposn)
YYFPRINTF (stderr, "%*s%s <empty>\n", yyindent+2, "",
yytokenName (yyrhs[yyprhs[yyx->yyrule]+yyi-1]),
yystates[yyi-1]->yyposn+1, yystates[yyi]->yyposn);
}
- else
+ else
yyreportTree (yystates[yyi]->yysemantics.yyfirstVal, yyindent+2);
}
}
-#endif
+#endif
static void
yyreportAmbiguity (yySemanticOption* yyx0, yySemanticOption* yyx1,
yyGLRStack* yystack)
{
+ /* `Unused' warnings. */
+ (void) yyx0;
+ (void) yyx1;
+
#if YYDEBUG
YYFPRINTF (stderr, "Ambiguity detected.\n");
YYFPRINTF (stderr, "Option 1,\n");
/** Resolve the ambiguity represented by OPTIONLIST, perform the indicated
* actions, and return the result. */
static YYRESULTTAG
-yyresolveValue (yySemanticOption* yyoptionList, yyGLRStack* yystack,
- YYSTYPE* yyvalp, YYLTYPE* yylocp)
+yyresolveValue (yySemanticOption* yyoptionList, yyGLRStack* yystack,
+ YYSTYPE* yyvalp, YYLTYPE* yylocp)
{
yySemanticOption* yybest;
yySemanticOption* yyp;
int yymerge;
- yybest = yyoptionList;
+ yybest = yyoptionList;
yymerge = 0;
- for (yyp = yyoptionList->yynext; yyp != NULL; yyp = yyp->yynext)
+ for (yyp = yyoptionList->yynext; yyp != NULL; yyp = yyp->yynext)
{
if (yyidenticalOptions (yybest, yyp))
yymergeOptionSets (yybest, yyp);
else
- switch (yypreference (yybest, yyp))
+ switch (yypreference (yybest, yyp))
{
case 0:
yyreportAmbiguity (yybest, yyp, yystack);
}
}
- if (yymerge)
+ if (yymerge)
{
int yyprec = yydprec[yybest->yyrule];
YYCHK (yyresolveAction (yybest, yystack, yyvalp, yylocp));
- for (yyp = yybest->yynext; yyp != NULL; yyp = yyp->yynext)
+ for (yyp = yybest->yynext; yyp != NULL; yyp = yyp->yynext)
{
- if (yyprec == yydprec[yyp->yyrule])
+ if (yyprec == yydprec[yyp->yyrule])
{
YYSTYPE yyval1;
YYLTYPE yydummy;
}
static YYRESULTTAG
-yyresolveStack (yyGLRStack* yystack)
+yyresolveStack (yyGLRStack* yystack)
{
- if (yystack->yysplitPoint != NULL)
+ if (yystack->yysplitPoint != NULL)
{
yyGLRState* yys;
int yyn;
- for (yyn = 0, yys = yystack->yytops.yystates[0];
- yys != yystack->yysplitPoint;
+ for (yyn = 0, yys = yystack->yytops.yystates[0];
+ yys != yystack->yysplitPoint;
yys = yys->yypred, yyn += 1)
;
YYCHK (yyresolveStates (yystack->yytops.yystates[0], yyn, yystack));
}
static void
-yycompressStack (yyGLRStack* yystack)
+yycompressStack (yyGLRStack* yystack)
{
yyGLRState* yyp, *yyq, *yyr;
if (yystack->yytops.yysize != 1 || yystack->yysplitPoint == NULL)
return;
- for (yyp = yystack->yytops.yystates[0], yyq = yyp->yypred, yyr = NULL;
- yyp != yystack->yysplitPoint;
+ for (yyp = yystack->yytops.yystates[0], yyq = yyp->yypred, yyr = NULL;
+ yyp != yystack->yysplitPoint;
yyr = yyp, yyp = yyq, yyq = yyp->yypred)
yyp->yypred = yyr;
-
+
yystack->yyspaceLeft += yystack->yynextFree - yystack->yyitems;
yystack->yynextFree = ((yyGLRStackItem*) yystack->yysplitPoint) + 1;
yystack->yyspaceLeft -= yystack->yynextFree - yystack->yyitems;
yystack->yysplitPoint = NULL;
yystack->yylastDeleted = NULL;
-
- while (yyr != NULL)
- {
+
+ while (yyr != NULL)
+ {
yystack->yynextFree->yystate = *yyr;
yyr = yyr->yypred;
yystack->yynextFree->yystate.yypred = & yystack->yynextFree[-1].yystate;
}
static YYRESULTTAG
-yyprocessOneStack (yyGLRStack* yystack, int yyk,
+yyprocessOneStack (yyGLRStack* yystack, int yyk,
size_t yyposn, YYSTYPE* yylvalp, YYLTYPE* yyllocp)
{
int yyaction;
yyRuleNum yyrule;
yySymbol* const yytokenp = yystack->yytokenp;
- while (yystack->yytops.yystates[yyk] != NULL)
+ while (yystack->yytops.yystates[yyk] != NULL)
{
yyStateNum yystate = yystack->yytops.yystates[yyk]->yylrState;
assert (yystate != YYFINAL);
- if (yyisDefaultedState (yystate))
+ if (yyisDefaultedState (yystate))
{
yyrule = yydefaultAction (yystate);
- if (yyrule == 0)
+ if (yyrule == 0)
{
YYDPRINTF ((stderr, "Stack %d dies.\n", yyk));
yymarkStackDeleted (yystack, yyk);
}
YYCHK (yyglrReduce (yystack, yyk, yyrule, yyfalse));
}
- else
+ else
{
- if (*yytokenp == YYEMPTY)
+ if (*yytokenp == YYEMPTY)
{
+ YYDPRINTF ((stderr, "Reading a token: "));
yychar = YYLEX;
*yytokenp = YYTRANSLATE(yychar);
- YYDPRINTF ((stderr, "Read token %s\n", yytokenName (*yytokenp)));
+ YYDPRINTF ((stderr, "Next token is %s\n",
+ yytokenName (*yytokenp)));
}
yygetLRActions (yystate, *yytokenp, &yyaction, &yyconflicts);
- while (*yyconflicts != 0)
+ while (*yyconflicts != 0)
{
int yynewStack = yysplitStack (yystack, yyk);
YYDPRINTF ((stderr, "Splitting off stack %d from %d.\n",
yynewStack, yyk));
YYCHK (yyglrReduce (yystack, yynewStack, *yyconflicts, yyfalse));
- YYCHK (yyprocessOneStack (yystack, yynewStack, yyposn,
+ YYCHK (yyprocessOneStack (yystack, yynewStack, yyposn,
yylvalp, yyllocp));
yyconflicts += 1;
}
-
- if (yyisShiftAction (yyaction))
+
+ if (yyisShiftAction (yyaction))
{
- YYDPRINTF ((stderr, "Shifted token %s on stack %d, ",
+ YYDPRINTF ((stderr, "Shifting token %s on stack %d, ",
yytokenName (*yytokenp), yyk));
yyglrShift (yystack, yyk, yyaction, yyposn+1, *yylvalp, yyllocp);
- YYDPRINTF ((stderr, "which is now in state #%d\n",
+ YYDPRINTF ((stderr, "which is now in state #%d\n",
yystack->yytops.yystates[yyk]->yylrState));
break;
}
- else if (yyisErrorAction (yyaction))
+ else if (yyisErrorAction (yyaction))
{
YYDPRINTF ((stderr, "Stack %d dies.\n", yyk));
yymarkStackDeleted (yystack, yyk);
static void
yyreportParseError (yyGLRStack* yystack, YYSTYPE* yylvalp, YYLTYPE* yyllocp)
{
- yySymbol* const yytokenp = yystack->yytokenp;
+ /* `Unused' warnings. */
+ (void) yylvalp;
+ (void) yyllocp;
if (yystack->yyerrState == 0)
{
-#if YYERROR_VERBOSE
- int yyn, yyx, yycount, yysize;
- char* yyprefix;
+#if YYERROR_VERBOSE
+ yySymbol* const yytokenp = yystack->yytokenp;
+ int yyn, yyx, yycount;
+ size_t yysize;
+ const char* yyprefix;
char* yyp;
char* yymsg;
yyn = yypact[yystack->yytops.yystates[0]->yylrState];
- if (yyn > YYFLAG && yyn < YYLAST)
+ if (YYPACT_NINF < yyn && yyn < YYLAST)
{
yycount = 0;
/* Start YYX at -YYN if negative to avoid negative indexes in
YYCHECK. */
- yysize = sizeof ("parse error, unexpected ")
+ yysize = sizeof ("parse error, unexpected ")
+ strlen (yytokenName (*yytokenp));
yyprefix = ", expecting ";
- for (yyx = yyn < 0 ? -yyn : 0; yyx < yytname_size && yycount <= 5;
+ for (yyx = yyn < 0 ? -yyn : 0; yyx < yytname_size && yycount <= 5;
yyx += 1)
- if (yycheck[yyx + yyn] == yyx)
+ if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
yysize += strlen (yytokenName (yyx)) + strlen (yyprefix),
yycount += 1, yyprefix = " or ";
yymsg = yyp = (char*) malloc (yysize);
- yyp += sprintf (yyp, "parse error, unexpected %s",
+ yyp += sprintf (yyp, "parse error, unexpected %s",
yytokenName (*yytokenp));
if (yycount < 5)
{
yyprefix = ", expecting ";
for (yyx = yyn < 0 ? -yyn : 0; yyx < yytname_size; yyx += 1)
- if (yycheck[yyx + yyn] == yyx)
+ if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
{
yyp += sprintf (yyp, "%s%s", yyprefix, yytokenName (yyx));
yyprefix = " or ";
}
}
-/* Recover from a syntax error on STACK, assuming that TOKENP,
+/* Recover from a syntax error on YYSTACK, assuming that YYTOKENP,
YYLVALP, and YYLLOCP point to the syntactic category, semantic
- value, and location of the lookahead.
- NOTE: This uses the panic-mode recovery algorithm described in the
- Bison documentation, which differs from what is in bison.simple.
- Specifically, this routine performs no reductions before shifting
- the error token. */
-static void
+ value, and location of the lookahead. */
+static void
yyrecoverParseError (yyGLRStack* yystack, YYSTYPE* yylvalp, YYLTYPE* yyllocp)
{
yySymbol* const yytokenp = yystack->yytokenp;
- int yyk, yyj;
+ size_t yyk;
+ int yyj;
- if (yystack->yyerrState == 0)
+ if (yystack->yyerrState == 0)
yystack->yyerrState = 3;
- else if (yystack->yyerrState == 3)
- {
- /* We just shifted the error token and (perhaps) took some
- reductions. Skip tokens until we can proceed. */
- do {
+ else if (yystack->yyerrState == 3)
+ /* We just shifted the error token and (perhaps) took some
+ reductions. Skip tokens until we can proceed. */
+ while (yytrue)
+ {
if (*yytokenp == YYEOF)
yyFail (yystack, NULL);
if (*yytokenp != YYEMPTY)
- YYDPRINTF ((stderr, "Discarding token %s\n",
+ YYDPRINTF ((stderr, "Discarding token %s\n",
yytokenName (*yytokenp)));
+ YYDPRINTF ((stderr, "Reading a token: "));
yychar = YYLEX;
*yytokenp = YYTRANSLATE (yychar);
- YYDPRINTF ((stderr, "Read token %s\n", yytokenName (*yytokenp)));
+ YYDPRINTF ((stderr, "Next token is %s\n", yytokenName (*yytokenp)));
yyj = yypact[yystack->yytops.yystates[0]->yylrState];
- if (yyj == YYFLAG)
- /* Something's not right; we shouldn't be here */
+ if (yyj == YYPACT_NINF)
+ /* Something's not right; we shouldn't be here. */
yyFail (yystack, NULL);
yyj += *yytokenp;
if (yyj < 0 || yyj > YYLAST || yycheck[yyj] != *yytokenp)
if (yydefact[yystack->yytops.yystates[0]->yylrState] != 0)
return;
}
- else if (yytable[yyj] != 0 && yytable[yyj] != YYFLAG)
+ else if (yytable[yyj] != 0 && yytable[yyj] != YYTABLE_NINF)
return;
- } while (yytrue);
- }
-
- /* Reduce to one stack */
+ }
+
+ /* Reduce to one stack. */
for (yyk = 0; yyk < yystack->yytops.yysize; yyk += 1)
if (yystack->yytops.yystates[yyk] != NULL)
break;
yycompressStack (yystack);
/* Now pop stack until we find a state that shifts the error token. */
- while (yystack->yytops.yystates[0] != NULL)
+ while (yystack->yytops.yystates[0] != NULL)
{
yyj = yypact[yystack->yytops.yystates[0]->yylrState] + YYTERROR;
- if (yyj != YYFLAG + YYTERROR && yyj >= 0 && yyj <= YYLAST &&
+ if (yyj != YYPACT_NINF + YYTERROR && yyj >= 0 && yyj <= YYLAST &&
yycheck[yyj] == YYTERROR && yyisShiftAction (yytable[yyj]))
{
- yyglrShift (yystack, 0, yytable[yyj],
+ yyglrShift (yystack, 0, yytable[yyj],
yystack->yytops.yystates[0]->yyposn, *yylvalp, yyllocp);
break;
}
}
if (yystack->yytops.yystates[0] == NULL)
yyFail (yystack, NULL);
-}
-
+}
+
#define YYCHK1(YYE) \
do { \
switch (YYE) { \
case yyerr: \
goto yyuser_error; \
} \
- } while (0)
+ } while (0)
int
-yyparse (YYPARSE_PARAM_ARG)
+yyparse (YYPARSE_PARAM_ARG)
{
yySymbol yytoken;
yyGLRStack yystack;
YYSTYPE* const yylvalp = &yylval;
YYLTYPE* const yyllocp = &yylloc;
-
+
yyinitGLRStack (&yystack, YYINITDEPTH);
yystack.yytokenp = &yytoken;
+ YYDPRINTF ((stderr, "Starting parse\n"));
+
if (setjmp (yystack.yyexception_buffer) != 0)
goto yyDone;
yytoken = YYEMPTY;
yyposn = 0;
- while (yytrue)
+ while (yytrue)
{
/* For efficiency, we have two loops, of which the first of which
* is specialized to deterministic operation (single stack, no
* potential ambiguity). */
-
+
/* Standard mode */
- while (yytrue)
+ while (yytrue)
{
yyRuleNum yyrule;
int yyaction;
yyStateNum yystate = yystack.yytops.yystates[0]->yylrState;
if (yystate == YYFINAL)
goto yyDone;
- if (yyisDefaultedState (yystate))
+ if (yyisDefaultedState (yystate))
{
yyrule = yydefaultAction (yystate);
- if (yyrule == 0)
+ if (yyrule == 0)
{
yyreportParseError (&yystack, yylvalp, yyllocp);
goto yyuser_error;
}
YYCHK1 (yyglrReduce (&yystack, 0, yyrule, yytrue));
}
- else
+ else
{
- if (yytoken == YYEMPTY)
+ if (yytoken == YYEMPTY)
{
+ YYDPRINTF ((stderr, "Reading a token: "));
yychar = YYLEX;
yytoken = YYTRANSLATE (yychar);
- YYDPRINTF ((stderr, "Read token %s\n",
+ YYDPRINTF ((stderr, "Next token is %s\n",
yytokenName (yytoken)));
}
yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts);
if (*yyconflicts != 0)
break;
- if (yyisShiftAction (yyaction))
+ if (yyisShiftAction (yyaction))
{
- YYDPRINTF ((stderr, "Shifted token %s. ",
+ YYDPRINTF ((stderr, "Shifting token %s, ",
yytokenName (yytoken)));
if (yytoken != YYEOF)
yytoken = YYEMPTY;
yyglrShift (&yystack, 0, yyaction, yyposn, yylval, yyllocp);
if (yystack.yyerrState > 0)
yystack.yyerrState -= 1;
- YYDPRINTF ((stderr, "Now in state #%d\n",
+ YYDPRINTF ((stderr, "Entering state %d\n",
yystack.yytops.yystates[0]->yylrState));
}
else if (yyisErrorAction (yyaction))
}
}
- while (yytrue)
+ while (yytrue)
{
int yys;
int yyn = yystack.yytops.yysize;
yyreportParseError (&yystack, yylvalp, yyllocp);
goto yyuser_error;
}
- else if (yystack.yytops.yysize == 1)
+ else if (yystack.yytops.yysize == 1)
{
YYCHK1 (yyresolveStack (&yystack));
YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));
}
/* DEBUGGING ONLY */
+static void yypstack (yyGLRStack* yystack, int yyk) ATTRIBUTE_UNUSED;
+static void yypdumpstack (yyGLRStack* yystack) ATTRIBUTE_UNUSED;
-void
-yypstates (yyGLRState* yyst)
+static void
+yy_yypstack (yyGLRState* yys)
{
- void yy_yypstack (yyGLRState* yys)
+ if (yys->yypred)
{
- if (yys->yypred == NULL)
- fprintf (stderr, "%d@%d", yys->yylrState, yys->yyposn);
- else
- {
- yy_yypstack (yys->yypred);
- fprintf (stderr, " -> %d@%d", yys->yylrState, yys->yyposn);
- }
+ yy_yypstack (yys->yypred);
+ fprintf (stderr, " -> ");
}
+ fprintf (stderr, "%d@%lu", yys->yylrState, (unsigned long) yys->yyposn);
+}
- if (yyst == NULL)
+static void
+yypstates (yyGLRState* yyst)
+{
+ if (yyst == NULL)
fprintf (stderr, "<null>");
- else
+ else
yy_yypstack (yyst);
fprintf (stderr, "\n");
}
-void
-yypstack (yyGLRStack* yystack, int yyk)
+static void
+yypstack (yyGLRStack* yystack, int yyk)
{
yypstates (yystack->yytops.yystates[yyk]);
}
((YYX) == NULL ? -1 : (yyGLRStackItem*) (YYX) - yystack->yyitems)
-void
-yypdumpstack (yyGLRStack* yystack)
+static void
+yypdumpstack (yyGLRStack* yystack)
{
yyGLRStackItem* yyp;
- int yyi;
- for (yyp = yystack->yyitems; yyp < yystack->yynextFree; yyp += 1)
+ size_t yyi;
+ for (yyp = yystack->yyitems; yyp < yystack->yynextFree; yyp += 1)
{
- fprintf (stderr, "%3d. ", yyp - yystack->yyitems);
- if (*(bool*) yyp)
+ fprintf (stderr, "%3lu. ", (unsigned long) (yyp - yystack->yyitems));
+ if (*(bool*) yyp)
{
- fprintf (stderr, "Res: %d, LR State: %d, posn: %d, pred: %d",
- yyp->yystate.yyresolved, yyp->yystate.yylrState,
- yyp->yystate.yyposn,
- YYINDEX(yyp->yystate.yypred));
- if (! yyp->yystate.yyresolved)
- fprintf (stderr, ", firstVal: %d",
- YYINDEX (yyp->yystate.yysemantics.yyfirstVal));
+ fprintf (stderr, "Res: %d, LR State: %d, posn: %lu, pred: %ld",
+ yyp->yystate.yyresolved, yyp->yystate.yylrState,
+ (unsigned long) yyp->yystate.yyposn,
+ (long) YYINDEX (yyp->yystate.yypred));
+ if (! yyp->yystate.yyresolved)
+ fprintf (stderr, ", firstVal: %ld",
+ (long) YYINDEX (yyp->yystate.yysemantics.yyfirstVal));
}
- else
+ else
{
- fprintf (stderr, "Option. rule: %d, state: %d, next: %d",
- yyp->yyoption.yyrule, YYINDEX (yyp->yyoption.yystate),
- YYINDEX (yyp->yyoption.yynext));
+ fprintf (stderr, "Option. rule: %d, state: %ld, next: %ld",
+ yyp->yyoption.yyrule,
+ (long) YYINDEX (yyp->yyoption.yystate),
+ (long) YYINDEX (yyp->yyoption.yynext));
}
fprintf (stderr, "\n");
}
fprintf (stderr, "Tops:");
for (yyi = 0; yyi < yystack->yytops.yysize; yyi += 1)
- fprintf (stderr, "%d: %d; ", yyi, YYINDEX (yystack->yytops.yystates[yyi]));
+ fprintf (stderr, "%lu: %ld; ", (unsigned long) yyi,
+ (long) YYINDEX (yystack->yytops.yystates[yyi]));
fprintf (stderr, "\n");
}
b4_epilogue
m4_if(b4_defines_flag, 0, [],
[#output "b4_output_header_name"
+b4_copyright([Skeleton parser for GLR parsing with Bison], [2002])
#ifndef b4_header_guard
# define b4_header_guard
[#ifndef YYLTYPE
typedef struct yyltype
{
- int yyfirst_line;
- int yyfirst_column;
- int yylast_line;
- int yylast_column;
+ int first_line;
+ int first_column;
+ int last_line;
+ int last_column;
} yyltype;
# define YYLTYPE yyltype
#endif
projects / bison.git / blobdiff