m4_divert(-1) -*- YYC -*-
-# 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.
+
+# 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
+
+m4_include([c.m4])
-# 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])])
# 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 */
#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. */
#endif
#if ! defined (yy__GNUC__)
-# define inline
+# define inline
#endif
/* YYFINAL -- State number of the termination state. */
/* 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[] =
{
]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[] =
{
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)
+ 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)
+ 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];
}
{
return yypact[yystate] == YYFLAG;
}
-
+
/** 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 *ACTION to the action to take in STATE on seeing TOKEN.
* 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;
*yyaction = -yydefact[yystate];
*yyconflicts = yyconfl;
}
- else
+ else
{
*yyaction = yytable[yyindex];
*yyconflicts = yyconfl + yyconflp[yyindex];
}
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;
}
/** 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,
+void yyaddDeferredAction (yyGLRStack* yystack, yyGLRState* yystate,
yyGLRState* yyrhs, yyRuleNum yyrule)
{
yySemanticOption* yynewItem;
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;
{
int 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 (YYDEBUG && 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)
{
int yyposn = yystack->yytops.yystates[yyk]->yyposn;
- if (yyforceEval || yystack->yysplitPoint == NULL)
+ if (yyforceEval || yystack->yysplitPoint == NULL)
{
YYSTYPE yysval;
YYLTYPE yyloc;
-
+
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));
}
- else
+ else
{
int yyi, 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;
yyRuleNum yyr0 = yyy0->yyrule, yyr1 = yyy1->yyrule;
int yyp0 = yydprec[yyr0], yyp1 = yydprec[yyr1];
- if (yyp0 == yyp1)
+ if (yyp0 == yyp1)
{
if (yymerger[yyr0] == 0 || yymerger[yyr0] != yymerger[yyr1])
return 0;
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 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,
/** 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)
{
yychar = YYLEX;
*yytokenp = YYTRANSLATE(yychar);
}
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, "Shifted 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);
if (yystack->yyerrState == 0)
{
-#if YYERROR_VERBOSE
+#if YYERROR_VERBOSE
int yyn, yyx, yycount, yysize;
char* yyprefix;
char* yyp;
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)
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)
{
/* Recover from a syntax error on STACK, assuming that TOKENP,
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.
+ 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
+static void
yyrecoverParseError (yyGLRStack* yystack, YYSTYPE* yylvalp, YYLTYPE* yyllocp)
{
yySymbol* const yytokenp = yystack->yytokenp;
int yyk, yyj;
- if (yystack->yyerrState == 0)
+ if (yystack->yyerrState == 0)
yystack->yyerrState = 3;
- else if (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. */
if (*yytokenp == YYEOF)
yyFail (yystack, NULL);
if (*yytokenp != YYEMPTY)
- YYDPRINTF ((stderr, "Discarding token %s\n",
+ YYDPRINTF ((stderr, "Discarding token %s\n",
yytokenName (*yytokenp)));
yychar = YYLEX;
*yytokenp = YYTRANSLATE (yychar);
return;
} while (yytrue);
}
-
+
/* Reduce to one stack */
for (yyk = 0; yyk < yystack->yytops.yysize; yyk += 1)
if (yystack->yytops.yystates[yyk] != NULL)
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 != YYFLAG + 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;
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)
{
yychar = YYLEX;
yytoken = YYTRANSLATE (yychar);
- YYDPRINTF ((stderr, "Read token %s\n",
+ YYDPRINTF ((stderr, "Read token %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, "Shifted 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, "Now in 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 */
void
-yypstates (yyGLRState* yyst)
+yypstates (yyGLRState* yyst)
{
- void yy_yypstack (yyGLRState* yys)
+ void yy_yypstack (yyGLRState* yys)
{
if (yys->yypred == NULL)
fprintf (stderr, "%d@%d", yys->yylrState, yys->yyposn);
- else
+ else
{
yy_yypstack (yys->yypred);
fprintf (stderr, " -> %d@%d", yys->yylrState, yys->yyposn);
}
}
- if (yyst == NULL)
+ if (yyst == NULL)
fprintf (stderr, "<null>");
- else
+ else
yy_yypstack (yyst);
fprintf (stderr, "\n");
}
void
-yypstack (yyGLRStack* yystack, int yyk)
+yypstack (yyGLRStack* yystack, int yyk)
{
yypstates (yystack->yytops.yystates[yyk]);
}
void
-yypdumpstack (yyGLRStack* yystack)
+yypdumpstack (yyGLRStack* yystack)
{
yyGLRStackItem* yyp;
int yyi;
- for (yyp = yystack->yyitems; yyp < yystack->yynextFree; yyp += 1)
+ for (yyp = yystack->yyitems; yyp < yystack->yynextFree; yyp += 1)
{
fprintf (stderr, "%3d. ", yyp - yystack->yyitems);
- if (*(bool*) yyp)
+ if (*(bool*) yyp)
{
fprintf (stderr, "Res: %d, LR State: %d, posn: %d, pred: %d",
- yyp->yystate.yyresolved, yyp->yystate.yylrState,
+ yyp->yystate.yyresolved, yyp->yystate.yylrState,
yyp->yystate.yyposn,
YYINDEX(yyp->yystate.yypred));
- if (! yyp->yystate.yyresolved)
- fprintf (stderr, ", firstVal: %d",
+ if (! yyp->yystate.yyresolved)
+ fprintf (stderr, ", firstVal: %d",
YYINDEX (yyp->yystate.yysemantics.yyfirstVal));
}
- else
+ else
{
fprintf (stderr, "Option. rule: %d, state: %d, next: %d",
- yyp->yyoption.yyrule, YYINDEX (yyp->yyoption.yystate),
+ yyp->yyoption.yyrule, YYINDEX (yyp->yyoption.yystate),
YYINDEX (yyp->yyoption.yynext));
}
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
projects / bison.git / commitdiff
