m4_divert(-1) -*- C -*-
-m4_include([c.m4])
# GLR skeleton for Bison
-# Copyright (C) 2002 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2003 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
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
# 02111-1307 USA
+
+## ---------------- ##
+## Default values. ##
+## ---------------- ##
+
+# Stack parameters.
+m4_define_default([b4_stack_depth_max], [10000])
+m4_define_default([b4_stack_depth_init], [200])
+
+
+
+## ------------------------ ##
+## Pure/impure interfaces. ##
+## ------------------------ ##
+
+
+# b4_lex_param
+# ------------
+# 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_ifdef([b4_lex_param], [, ]b4_lex_param)))
+
+
+# b4_user_formals
+# ---------------
+m4_define([b4_user_formals],
+[m4_ifset([b4_parse_param], [, b4_c_ansi_formals(b4_parse_param)])])
+
+
+# b4_yyerror_args
+# ---------------
+# Arguments passed to yyerror: user args plus yylloc.
+m4_define([b4_yyerror_args],
+[b4_pure_if([b4_location_if([yylocp, ])])dnl
+m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
+
+
+# b4_lyyerror_args
+# ----------------
+# Same as above, but on the lookahead, hence yyllocp instead of yylocp.
+m4_define([b4_lyyerror_args],
+[b4_pure_if([b4_location_if([yyllocp, ])])dnl
+m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
+
+
+# b4_pure_args
+# ------------
+# Arguments needed by yyerror: user args plus yylloc.
+m4_define([b4_pure_args],
+[b4_pure_if([b4_location_if([, yylocp])])[]b4_user_args])
+
+
+# b4_pure_formals
+# ---------------
+# Arguments passed to yyerror: user formals plus yyllocp.
+m4_define([b4_pure_formals],
+[b4_pure_if([b4_location_if([, YYLTYPE *yylocp])])[]b4_user_formals])
+
+
+# b4_lpure_args
+# -------------
+# Same as above, but on the lookahead, hence yyllocp instead of yylocp.
+m4_define([b4_lpure_args],
+[b4_pure_if([b4_location_if([, yyllocp])])[]b4_user_args])
+
+
+# b4_lpure_formals
+# ----------------
+# Same as above, but on the lookahead, hence yyllocp instead of yylocp.
+m4_define([b4_lpure_formals],
+[b4_pure_if([b4_location_if([YYLTYPE *yyllocp])])[]b4_user_formals])
+
+
+## ----------------- ##
+## Semantic Values. ##
+## ----------------- ##
+
+
# b4_lhs_value([TYPE])
# --------------------
# Expansion of $<TYPE>$.
# Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
# symbols on RHS.
m4_define([b4_rhs_value],
-[yyvsp@<:@m4_eval([$2 - $1])@:>@.yystate.yysemantics.yysval[]m4_ifval([$3], [.$3])])
+[yyvsp@{YYFILL (m4_eval([$2 - $1]))@}.yystate.yysemantics.yysval[]m4_ifval([$3], [.$3])])
## Locations. ##
## ----------- ##
-# b4_location_if(IF-TRUE, IF-FALSE)
-# ---------------------------------
-# Expand IF-TRUE, if locations are used, IF-FALSE otherwise.
-m4_define([b4_location_if],
-[m4_if(b4_locations_flag, [1],
- [$1],
- [$2])])
-
-
# b4_lhs_location()
# -----------------
# Expansion of @$.
# Expansion of @NUM, where the current rule has RULE-LENGTH symbols
# on RHS.
m4_define([b4_rhs_location],
-[yyvsp@<:@m4_eval([$2 - $1])@:>@.yystate.yyloc])
-
-
-
-## -------------- ##
-## %pure-parser. ##
-## -------------- ##
-
-# b4_pure_if(IF-TRUE, IF-FALSE)
-# -----------------------------
-# Expand IF-TRUE, if %pure-parser, IF-FALSE otherwise.
-m4_define([b4_pure_if],
-[m4_if(b4_pure, [1],
- [$1],
- [$2])])
-
-
-## ------------------- ##
-## Output file names. ##
-## ------------------- ##
-
-m4_define_default([b4_input_suffix], [.y])
-
-m4_define_default([b4_output_parser_suffix],
-[m4_translit(b4_input_suffix, [yY], [cC])])
-
-m4_define_default([b4_output_parser_name],
-[b4_output_prefix[]b4_output_infix[]b4_output_parser_suffix[]])
-
-
-m4_define_default([b4_output_header_suffix],
-[m4_translit(b4_input_suffix, [yY], [hH])])
-
-m4_define_default([b4_output_header_name],
-[b4_output_prefix[]b4_output_infix[]b4_output_header_suffix[]])
-
-m4_define_default([b4_header_guard],
- [m4_bpatsubst(m4_toupper([BISON_]b4_output_header_name),
- [[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]], [_])])
-
+[yyvsp@{YYFILL (m4_eval([$2 - $1]))@}.yystate.yyloc])
+# We do want M4 expansion after # for CPP macros.
+m4_changecom()
m4_divert(0)dnl
-#output "b4_output_parser_name"
-b4_copyright([Skeleton parser for GLR parsing with Bison], [2002])
+@output @output_parser_name@
+b4_copyright([Skeleton parser for GLR parsing with Bison], [2002, 2003])
[
/* This is the parser code for GLR (Generalized LR) parser. */
-/* FIXME: minimize these */
-#include <assert.h>
-#include <setjmp.h>
-#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <stdarg.h>
+#include <setjmp.h>
-/* Identify Bison output. */
-#define YYBISON 1
-
-/* Pure parsers. */
-#define YYPURE ]b4_pure[
-
-/* Using locations. */
-#define YYLSP_NEEDED ]b4_locations_flag[
-
-]m4_if(b4_prefix[], [yy], [],
+]b4_identification
+m4_if(b4_prefix[], [yy], [],
[/* If NAME_PREFIX is specified substitute the variables and functions
names. */
#define yyparse b4_prefix[]parse
# define YYERROR_VERBOSE ]b4_error_verbose[
#endif
-#ifndef YYSTYPE
+#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED)
]m4_ifdef([b4_stype],
-[#line b4_stype_line "b4_filename"
-typedef union b4_stype yystype;
-/* Line __line__ of __file__. */
-#line __oline__ "__ofile__"],
-[typedef int yystype;])[
-# define YYSTYPE yystype
+[b4_syncline([b4_stype_line], [b4_filename])
+typedef union m4_bregexp(b4_stype, [^{], [YYSTYPE ])b4_stype YYSTYPE;
+/* Line __line__ of glr.c. */
+b4_syncline([@oline@], [@ofile@])],
+[typedef int YYSTYPE;])[
+# define YYSTYPE_IS_DECLARED 1
# define YYSTYPE_IS_TRIVIAL 1
#endif
-#ifndef YYLTYPE
-typedef struct yyltype
+#if ! defined (YYLTYPE) && ! defined (YYLTYPE_IS_DECLARED)
+typedef struct YYLTYPE
{
]b4_location_if([
- int yyfirst_line;
- int yyfirst_column;
- int yylast_line;
- int yylast_column;])[
-} yyltype;
-# define YYLTYPE ]b4_ltype[
+ int first_line;
+ int first_column;
+ int last_line;
+ int last_column;
+])[
+} YYLTYPE;
+# define YYLTYPE_IS_DECLARED 1
# define YYLTYPE_IS_TRIVIAL 1
#endif
/* Default (constant) values used for initialization for null
- right-hand sides. Unlike the standard bison.simple template,
- here we set the default values of the $$ and $@ to zeroed-out
+ right-hand sides. Unlike the standard yacc.c template,
+ here we set the default values of $$ and $@@ to zeroed-out
values. Since the default value of these quantities is undefined,
this behavior is technically correct. */
static YYSTYPE yyval_default;
/* Copy the second part of user declarations. */
]b4_post_prologue[
-]/* Line __line__ of __file__. */
-#line __oline__ "__ofile__"
+]/* Line __line__ of glr.c. */
+b4_syncline([@oline@], [@ofile@])
[
-#if ! defined (__cplusplus)
- typedef char bool;
-# define yytrue 1
-# define yyfalse 0
+#ifdef __cplusplus
+ typedef bool yybool;
+#else
+ typedef unsigned char yybool;
#endif
+#define yytrue 1
+#define yyfalse 0
/*-----------------.
| GCC extensions. |
# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
#endif
-#if ! defined (__GNUC__)
-# define inline
-#endif
-
/* YYFINAL -- State number of the termination state. */
#define YYFINAL ]b4_final_state_number[
-#define YYFLAG ]b4_flag[
+/* YYLAST -- Last index in YYTABLE. */
#define YYLAST ]b4_last[
/* YYNTOKENS -- Number of terminals. */
#define YYNSTATES ]b4_states_number[
/* 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. */
+#define YYMAXLEFT ]b4_max_left_semantic_context[
/* YYTRANSLATE(X) -- Bison symbol number corresponding to X. */
#define YYUNDEFTOK ]b4_undef_token_number[
#define YYMAXUTOK ]b4_user_token_number_max[
-#define YYTRANSLATE(YYX) \
- ((unsigned)(YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
+#define YYTRANSLATE(YYX) \
+ ((YYX <= 0) ? YYEOF : \
+ (unsigned)(YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
/* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX. */
static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
{
]b4_tname[
};
-
-#define yytname_size ((int) (sizeof (yytname) / sizeof (yytname[0])))
#endif
/* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */
/* 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. */
+ number is the opposite. If zero, do what YYDEFACT says.
+ If YYTABLE_NINF, syntax error. */
#define YYTABLE_NINF ]b4_table_ninf[
static const ]b4_int_type_for([b4_table])[ yytable[] =
{
]b4_table[
};
-/* 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
- is terminated by a rule number of 0. */
+/* 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 is terminated by a rule number of 0. */
static const ]b4_int_type_for([b4_conflict_list_heads])[ yyconflp[] =
{
]b4_conflict_list_heads[
};
-/* YYCONFL[I] -- lists of conflicting rule numbers, each terminated
- by 0, pointed into by YYCONFLP. */
+/* YYCONFL[I] -- lists of conflicting rule numbers, each terminated by
+ 0, pointed into by YYCONFLP. */
]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.
]b4_check[
};
+/* YYSTOS[STATE-NUM] -- The (internal number of the) accessing
+ symbol of state STATE-NUM. */
+static const ]b4_int_type_for([b4_stos])[ yystos[] =
+{
+ ]b4_stos[
+};
+
\f
-/* The user can define YYPARSE_PARAM as the name of an argument to be passed
- into yyparse. The argument should have type void *.
- It should actually point to an object.
- Grammar actions can access the variable by casting it
- to the proper pointer type. */
-
-#ifdef YYPARSE_PARAM
-# define YYPARSE_PARAM_ARG void *YYPARSE_PARAM
-#else /* !YYPARSE_PARAM */
-# define YYPARSE_PARAM_ARG void
-#endif /* !YYPARSE_PARAM */
-
-/* Prevent warning if -Wstrict-prototypes. */
-#ifdef __GNUC__
-# ifdef YYPARSE_PARAM
-int yyparse (void *);
-# else
-int yyparse (void);
-# endif
-#endif
+/* Prevent warning if -Wmissing-prototypes. */
+]b4_c_ansi_function_decl([yyparse], [int], b4_parse_param)[
/* Error token number */
#define YYTERROR 1
/* YYLLOC_DEFAULT -- Compute the default location (before the actions
are run). */
-#define YYRHSLOC(yyRhs,YYK) (yyRhs[YYK].yystate.yyloc)
+]b4_location_if([[
+#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;
+ (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
+]],[
+#ifndef YYLLOC_DEFAULT
+# define YYLLOC_DEFAULT(yyCurrent, yyRhs, YYN)
+#endif
+])[
+
/* YYLEX -- calling `yylex' with the right arguments. */
+#define YYLEX ]b4_c_function_call([yylex], [int], b4_lex_param)[
]b4_pure_if(
[
-#ifdef YYLEX_PARAM
-# define YYLEX yylex (yylvalp, b4_location_if([yyllocp, ])YYLEX_PARAM)
-#else
-# define YYLEX yylex (yylvalp[]b4_location_if([, yyllocp]))
-#endif],
-[#define YYLEX yylex ()])
-
-b4_pure_if(
-[
#undef yynerrs
#define yynerrs (yystack->yyerrcnt)
#undef yychar
if (yydebug) \
YYFPRINTF Args; \
} while (0)
+
+]b4_yysymprint_generate([b4_c_ansi_function_def])[
+
+# define YYDSYMPRINT(Args) \
+do { \
+ if (yydebug) \
+ yysymprint Args; \
+} while (0)
+
+# define YYDSYMPRINTF(Title, Token, Value, Location) \
+do { \
+ if (yydebug) \
+ { \
+ YYFPRINTF (stderr, "%s ", Title); \
+ yysymprint (stderr, \
+ Token, Value]b4_location_if([, Location])[); \
+ YYFPRINTF (stderr, "\n"); \
+ } \
+} while (0)
+
/* Nonzero means print parse trace. It is left uninitialized so that
multiple parsers can coexist. */
int yydebug;
+
#else /* !YYDEBUG */
+
/* Avoid empty `if' bodies. */
-# define YYDPRINTF(Args) {}
+# define YYDPRINTF(Args)
+# define YYDSYMPRINT(Args)
+# define YYDSYMPRINTF(Title, Token, Value, Location)
+
#endif /* !YYDEBUG */
/* YYINITDEPTH -- initial size of the parser's stacks. */
#ifndef YYINITDEPTH
-# define YYINITDEPTH ]b4_initdepth[
+# define YYINITDEPTH ]b4_stack_depth_init[
#endif
/* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
#endif
#ifndef YYMAXDEPTH
-# define YYMAXDEPTH ]b4_maxdepth[
+# define YYMAXDEPTH ]b4_stack_depth_max[
#endif
/* Minimum number of free items on the stack allowed after an
properly redirected to new data. */
#define YYHEADROOM 2
-#if ! defined (YYSTACKEXPANDABLE) \
- && (! defined (__cplusplus) || (YYLTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL))
+#if (! defined (YYSTACKEXPANDABLE) \
+ && (! 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
typedef struct yyGLRStateSet yyGLRStateSet;
struct yyGLRState {
- bool yyisState;
- bool yyresolved;
+ yybool yyisState;
+ yybool yyresolved;
yyStateNum yylrState;
yyGLRState* yypred;
size_t yyposn;
};
struct yySemanticOption {
- bool yyisState;
+ yybool yyisState;
yyRuleNum yyrule;
yyGLRState* yystate;
yySemanticOption* yynext;
};
static void yyinitGLRStack (yyGLRStack* yystack, size_t yysize);
-static void yyexpandGLRStack (yyGLRStack* yystack);
+static void yyexpandGLRStack (yyGLRStack* yystack]b4_pure_formals[);
static void yyfreeGLRStack (yyGLRStack* yystack);
static void
-yyFail (yyGLRStack* yystack, const char* yyformat, ...)
+yyFail (yyGLRStack* yystack]b4_pure_formals[, const char* yyformat, ...)
{
+ yystack->yyerrflag = 1;
if (yyformat != NULL)
{
char yymsg[256];
va_list yyap;
va_start (yyap, yyformat);
- yystack->yyerrflag = 1;
vsprintf (yymsg, yyformat, yyap);
- yyerror (yymsg);
+ yyerror (]b4_yyerror_args[yymsg);
}
longjmp (yystack->yyexception_buffer, 1);
}
}
#endif
+/** 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. Assumes
+ * YYLOW1 < YYLOW0. */
+static void yyfillin (yyGLRStackItem *, int, int) ATTRIBUTE_UNUSED;
+static void
+yyfillin (yyGLRStackItem *yyvsp, int yylow0, int yylow1)
+{
+ yyGLRState* s;
+ int i;
+ s = yyvsp[yylow0].yystate.yypred;
+ for (i = yylow0-1; i >= yylow1; i -= 1)
+ {
+ if (! s->yyresolved)
+ abort ();
+ yyvsp[i].yystate.yyresolved = yytrue;
+ yyvsp[i].yystate.yysemantics.yysval = s->yysemantics.yysval;
+ yyvsp[i].yystate.yyloc = s->yyloc;
+ s = yyvsp[i].yystate.yypred = s->yypred;
+ }
+}
+
+/* Do nothing if YYNORMAL or if *YYLOW <= YYLOW1. Otherwise, fill in
+ YYVSP[YYLOW1 .. *YYLOW-1] as in yyfillin and set *YYLOW = YYLOW1.
+ For convenience, always return YYLOW1. */
+static inline int yyfill (yyGLRStackItem *, int *, int, yybool)
+ ATTRIBUTE_UNUSED;
+static inline int
+yyfill (yyGLRStackItem *yyvsp, int *yylow, int yylow1, yybool yynormal)
+{
+ if (!yynormal && yylow1 < *yylow)
+ {
+ yyfillin (yyvsp, *yylow, yylow1);
+ *yylow = yylow1;
+ }
+ return 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
- * (@$). Returns yyok for normal return, yyaccept for YYACCEPT,
+ * (@@$). Returns yyok for normal return, yyaccept for YYACCEPT,
* yyerr for YYERROR, yyabort for YYABORT. */
static YYRESULTTAG
yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp,
- YYSTYPE* yyvalp, YYLTYPE* yylocp, yyGLRStack* yystack)
+ YYSTYPE* yyvalp, YYLTYPE* yylocp, yyGLRStack* yystack
+ ]b4_user_formals[)
{
- /* Avoid `unused' warnings in there are no $n. */
- (void) yystack;
+ yybool yynormal ATTRIBUTE_UNUSED = (yystack->yysplitPoint == NULL);
+ int yylow;
- if (yyrhslen == 0)
- {
- *yyvalp = yyval_default;
- *yylocp = yyloc_default;
- }
- else
- {
- *yyvalp = yyvsp[1-yyrhslen].yystate.yysemantics.yysval;
- *yylocp = yyvsp[1-yyrhslen].yystate.yyloc;
- }
-# undef yyval
-# define yyval (*yyvalp)
# undef yyerrok
# define yyerrok (yystack->yyerrState = 0)
# undef YYACCEPT
# undef YYABORT
# define YYABORT return yyabort
# undef YYERROR
-# define YYERROR return yyerr
+# define YYERROR do { yystack->yyerrState = 0; return yyerr; } while (0)
# undef YYRECOVERING
# define YYRECOVERING (yystack->yyerrState != 0)
# undef yyclearin
# define yyclearin (yychar = *(yystack->yytokenp) = YYEMPTY)
+# undef YYFILL
+# define YYFILL(N) yyfill (yyvsp, &yylow, N, yynormal)
# undef YYBACKUP
# define YYBACKUP(Token, Value) \
do { \
- yyerror ("syntax error: cannot back up"); \
+ yyerror (]b4_yyerror_args["syntax error: cannot back up"); \
YYERROR; \
} while (0)
+ yylow = 1;
+ if (yyrhslen == 0)
+ {
+ *yyvalp = yyval_default;
+ *yylocp = yyloc_default;
+ }
+ else
+ {
+ *yyvalp = yyvsp[YYFILL (1-yyrhslen)].yystate.yysemantics.yysval;
+ YYLLOC_DEFAULT (*yylocp, yyvsp - yyrhslen, yyrhslen);
+ }
+
]
- switch (yyn)
- {
- b4_actions
- }
+ switch (yyn)
+ {
+ b4_actions
+ }
- return yyok;
-# undef yyval
+ return yyok;
# undef yyerrok
# undef YYABORT
# undef YYACCEPT
# undef YYBACKUP
# undef yyclearin
# undef YYRECOVERING
-/* Line __line__ of __file__. */
-#line __oline__ "__ofile__"
+/* Line __line__ of glr.c. */
+b4_syncline([@oline@], [@ofile@])
}
\f
yyuserMerge (int yyn, YYSTYPE* yy0, YYSTYPE* yy1)
{
YYSTYPE yyval = *yy0;
- /* `Use' the arguments. */
+ /* `Use' the arguments. */
(void) yy0;
(void) yy1;
return yyval;
}
[
- /* Bison grammar-table manipulation */
+ /* Bison grammar-table manipulation. */
+
+]b4_yydestruct_generate([b4_c_ansi_function_def])[
/** Number of symbols composing the right hand side of rule #RULE. */
static inline int
return yyr1[yyrule];
}
+#define yyis_pact_ninf(yystate) \
+ ]m4_if(m4_eval(b4_pact_ninf < b4_pact_min), 1,
+ 0,
+ ((yystate) == YYPACT_NINF))[
+
/** True iff LR state STATE has only a default reduction (regardless
* of token). */
-static inline bool
+static inline yybool
yyisDefaultedState (yyStateNum yystate)
{
- return yypact[yystate] == YYPACT_NINF;
+ return yyis_pact_ninf (yypact[yystate]);
}
/** The default reduction for STATE, assuming it has one. */
return yydefact[yystate];
}
-/** Set *ACTION to the action to take in STATE on seeing TOKEN.
+#define yyis_table_ninf(yytable_value) \
+ ]m4_if(m4_eval(b4_table_ninf < b4_table_min), 1,
+ 0,
+ ((yytable_value) == YYTABLE_NINF))[
+
+/** Set *YYACTION to the action to take in YYSTATE on seeing YYTOKEN.
* Result R means
* R < 0: Reduce on rule -R.
* R = 0: Error.
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 (! yyis_table_ninf (yytable[yyindex]))
{
*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
+static inline yybool
yyisShiftAction (int yyaction)
{
- return yyaction > 0;
+ return 0 < yyaction;
}
-static inline bool
+static inline yybool
yyisErrorAction (int yyaction)
{
- return yyaction == 0 || yyaction == YYPACT_NINF;
+ return yyaction == 0;
}
/* GLRStates */
-/** True iff the semantic value of the edge leading to STATE is
- * resolved. */
-static inline bool
-yyhasResolvedValue (yyGLRState* yystate)
-{
- return yystate->yyresolved;
-}
-
static void
yyaddDeferredAction (yyGLRStack* yystack, yyGLRState* yystate,
- yyGLRState* yyrhs, yyRuleNum yyrule)
+ yyGLRState* rhs, yyRuleNum yyrule]b4_pure_formals[)
{
yySemanticOption* yynewItem;
yynewItem = &yystack->yynextFree->yyoption;
yystack->yyspaceLeft -= 1;
yystack->yynextFree += 1;
yynewItem->yyisState = yyfalse;
- yynewItem->yystate = yyrhs;
+ yynewItem->yystate = rhs;
yynewItem->yyrule = yyrule;
yynewItem->yynext = yystate->yysemantics.yyfirstVal;
yystate->yysemantics.yyfirstVal = yynewItem;
if (yystack->yyspaceLeft < YYHEADROOM)
- yyexpandGLRStack (yystack);
+ yyexpandGLRStack (yystack]b4_pure_args[);
}
/* GLRStacks */
allocation, so that we can avoid having external pointers exist
across an allocation. */
static void
-yyexpandGLRStack (yyGLRStack* yystack)
+yyexpandGLRStack (yyGLRStack* yystack]b4_pure_formals[)
{
#if YYSTACKEXPANDABLE
yyGLRStack yynewStack;
size_t yysize, yynewSize;
size_t yyn;
yysize = yystack->yynextFree - yystack->yyitems;
- if (yysize >= YYMAXDEPTH)
- yyFail (yystack, "parsing stack overflow (%d items)", yysize);
+ if (YYMAXDEPTH <= yysize)
+ yyFail (yystack][]b4_pure_args[, "parser stack overflow");
yynewSize = 2*yysize;
- if (yynewSize > YYMAXDEPTH)
+ if (YYMAXDEPTH < yynewSize)
yynewSize = YYMAXDEPTH;
yyinitGLRStack (&yynewStack, yynewSize);
for (yyp0 = yystack->yyitems, yyp1 = yynewStack.yyitems, yyn = yysize;
- yyn > 0;
+ 0 < yyn;
yyn -= 1, yyp0 += 1, yyp1 += 1)
{
*yyp1 = *yyp0;
- if (*(bool*) yyp0)
+ if (*(yybool *) yyp0)
{
yyGLRState* yys0 = &yyp0->yystate;
yyGLRState* yys1 = &yyp1->yystate;
#else
- yyFail (yystack, "parsing stack overflow (%d items)", yysize);
-
+ yyFail (yystack][]b4_pure_args[, "parser stack overflow");
#endif
}
if (yystack->yytops.yystates[yyi] == NULL)
{
if (yyi == yyj)
- YYDPRINTF ((stderr, "Removing dead stacks.\n"));
+ {
+ YYDPRINTF ((stderr, "Removing dead stacks.\n"));
+ }
yystack->yytops.yysize -= 1;
}
else
{
yystack->yytops.yystates[yyj] = yystack->yytops.yystates[yyi];
if (yyj != yyi)
- YYDPRINTF ((stderr, "Rename stack %d -> %d.\n", yyi, yyj));
+ {
+ YYDPRINTF ((stderr, "Rename stack %d -> %d.\n", yyi, yyj));
+ }
yyj += 1;
}
yyi += 1;
* 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)
+ YYSTYPE yysval, YYLTYPE* yylocp]b4_user_formals[)
{
yyGLRStackItem* yynewItem;
yynewItem->yystate.yysemantics.yysval = yysval;
yynewItem->yystate.yyloc = *yylocp;
if (yystack->yyspaceLeft < YYHEADROOM)
- yyexpandGLRStack (yystack);
+ yyexpandGLRStack (yystack]b4_pure_args[);
}
-/** Shift to a new state on stack #K of STACK, to a new state
- * corresponding to LR state LRSTATE, at input position POSN, with
- * the (unresolved) semantic value of RHS under the action for RULE. */
+/** 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. */
static inline void
yyglrShiftDefer (yyGLRStack* yystack, int yyk, yyStateNum yylrState,
- size_t yyposn, yyGLRState* yyrhs, yyRuleNum yyrule)
+ size_t yyposn, yyGLRState* rhs, yyRuleNum yyrule]b4_pure_formals[)
{
yyGLRStackItem* yynewItem;
yystack->yytops.yystates[yyk] = &yynewItem->yystate;
yystack->yynextFree += 1;
yystack->yyspaceLeft -= 1;
- yyaddDeferredAction (yystack, &yynewItem->yystate, yyrhs, yyrule);
+ yyaddDeferredAction (yystack, &yynewItem->yystate, rhs, yyrule]b4_pure_args[);
}
/** Pop the symbols consumed by reduction #RULE from the top of stack
* have been previously resolved. Set *VALP to the resulting value,
* and *LOCP to the computed location (if any). Return value is as
* for userAction. */
-static inline int
+static inline YYRESULTTAG
yydoAction (yyGLRStack* yystack, int yyk, yyRuleNum yyrule,
- YYSTYPE* yyvalp, YYLTYPE* yylocp)
+ YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[)
{
int yynrhs = yyrhsLength (yyrule);
if (yystack->yysplitPoint == NULL)
{
/* Standard special case: single stack. */
- yyGLRStackItem* yyrhs = (yyGLRStackItem*) yystack->yytops.yystates[yyk];
- assert (yyk == 0);
+ yyGLRStackItem* rhs = (yyGLRStackItem*) yystack->yytops.yystates[yyk];
+ if (yyk != 0)
+ abort ();
yystack->yynextFree -= yynrhs;
yystack->yyspaceLeft += yynrhs;
yystack->yytops.yystates[0] = & yystack->yynextFree[-1].yystate;
- if (yynrhs == 0)
- {
- *yyvalp = yyval_default;
- *yylocp = yyloc_default;
- }
- else
- {
- *yyvalp = yyrhs[1-yynrhs].yystate.yysemantics.yysval;
- *yylocp = yyrhs[1-yynrhs].yystate.yyloc;
- }
- return yyuserAction (yyrule, yynrhs, yyrhs, yyvalp, yylocp, yystack);
+ return yyuserAction (yyrule, yynrhs, rhs,
+ yyvalp, yylocp, yystack]b4_user_args[);
}
else
{
int yyi;
yyGLRState* yys;
- yyGLRStackItem yyrhsVals[YYMAXRHS];
- for (yyi = yynrhs-1, yys = yystack->yytops.yystates[yyk]; yyi >= 0;
- yyi -= 1, yys = yys->yypred)
+ yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1];
+ yys = yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred
+ = yystack->yytops.yystates[yyk];
+ for (yyi = 0; yyi < yynrhs; yyi += 1)
{
- assert (yys->yypred != NULL);
- yyrhsVals[yyi].yystate.yyresolved = yytrue;
- yyrhsVals[yyi].yystate.yysemantics.yysval = yys->yysemantics.yysval;
- yyrhsVals[yyi].yystate.yyloc = yys->yyloc;
+ yys = yys->yypred;
+ if (yys == NULL)
+ abort ();
}
yyupdateSplit (yystack, yys);
yystack->yytops.yystates[yyk] = yys;
- if (yynrhs == 0)
- {
- *yyvalp = yyval_default;
- *yylocp = yyloc_default;
- }
- else
- {
- *yyvalp = yyrhsVals[0].yystate.yysemantics.yysval;
- *yylocp = yyrhsVals[0].yystate.yyloc;
- }
- return yyuserAction (yyrule, yynrhs, yyrhsVals + (yynrhs-1),
- yyvalp, yylocp, yystack);
+ return yyuserAction (yyrule, yynrhs, yyrhsVals + YYMAXRHS + YYMAXLEFT - 1,
+ yyvalp, yylocp, yystack]b4_user_args[);
}
}
+#if !YYDEBUG
+# define YY_REDUCE_PRINT(K, Rule)
+#else
+# define YY_REDUCE_PRINT(K, Rule) \
+do { \
+ if (yydebug) \
+ yy_reduce_print (K, Rule); \
+} while (0)
+
+/*----------------------------------------------------------.
+| Report that the RULE is going to be reduced on stack #K. |
+`----------------------------------------------------------*/
+
+static inline void
+yy_reduce_print (size_t yyk, yyRuleNum yyrule)
+{
+ int yyi;
+ unsigned int yylno = yyrline[yyrule];
+ YYFPRINTF (stderr, "Reducing stack %d by rule %d (line %u), ",
+ yyk, yyrule - 1, yylno);
+ /* Print the symbols being reduced, and their result. */
+ for (yyi = yyprhs[yyrule]; 0 <= yyrhs[yyi]; yyi++)
+ YYFPRINTF (stderr, "%s ", yytokenName (yyrhs[yyi]));
+ YYFPRINTF (stderr, "-> %s\n", yytokenName (yyr1[yyrule]));
+}
+#endif
+
/** 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
*/
static inline YYRESULTTAG
yyglrReduce (yyGLRStack* yystack, size_t yyk, yyRuleNum yyrule,
- bool yyforceEval)
+ yybool yyforceEval]b4_pure_formals[)
{
size_t yyposn = yystack->yytops.yystates[yyk]->yyposn;
YYSTYPE yysval;
YYLTYPE yyloc;
- YYCHK (yydoAction (yystack, yyk, yyrule, &yysval, &yyloc));
+ YY_REDUCE_PRINT (yyk, yyrule);
+ YYCHK (yydoAction (yystack, yyk, yyrule, &yysval, &yyloc]b4_user_args[));
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));
+ yyposn, yysval, &yyloc]b4_user_args[);
}
else
{
yyStateNum yynewLRState;
for (yys = yystack->yytops.yystates[yyk], yyn = yyrhsLength (yyrule);
- yyn > 0; yyn -= 1)
+ 0 < yyn; yyn -= 1)
{
yys = yys->yypred;
- assert (yys != NULL);
+ if (yys == NULL)
+ abort ();
}
yyupdateSplit (yystack, yys);
yynewLRState = yyLRgotoState (yys->yylrState, yylhsNonterm (yyrule));
{
if (yyp->yylrState == yynewLRState && yyp->yypred == yys)
{
- yyaddDeferredAction (yystack, yyp, yys0, yyrule);
+ yyaddDeferredAction (yystack, yyp, yys0, yyrule]b4_pure_args[);
yymarkStackDeleted (yystack, yyk);
YYDPRINTF ((stderr, "Merging stack %d into stack %d.\n",
yyk, yyi));
- return 0;
+ return yyok;
}
yyp = yyp->yypred;
}
}
yystack->yytops.yystates[yyk] = yys;
- yyglrShiftDefer (yystack, yyk, yynewLRState, yyposn, yys0, yyrule);
+ yyglrShiftDefer (yystack, yyk, yynewLRState, yyposn, yys0, yyrule]b4_pure_args[);
}
- return 0;
+ return yyok;
}
static int
{
if (yystack->yysplitPoint == NULL)
{
- assert (yyk == 0);
+ if (yyk != 0)
+ abort ();
yystack->yysplitPoint = yystack->yytops.yystates[yyk];
}
if (yystack->yytops.yysize >= yystack->yytops.yycapacity)
/** 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. */
-static bool
+static yybool
yyidenticalOptions (yySemanticOption* yyy0, yySemanticOption* yyy1)
{
if (yyy0->yyrule == yyy1->yyrule)
yySemanticOption* yyz;
for (yyz = yys0->yysemantics.yyfirstVal; yyz->yynext != NULL;
yyz = yyz->yynext)
- ;
+ continue;
yyz->yynext = yys1->yysemantics.yyfirstVal;
}
}
return 0;
if (p0 < p1)
return 3;
- if (p0 > p1)
+ if (p1 < p0)
return 2;
return 0;
}
static YYRESULTTAG yyresolveValue (yySemanticOption* yyoptionList,
yyGLRStack* yystack, YYSTYPE* yyvalp,
- YYLTYPE* yylocp);
+ YYLTYPE* yylocp]b4_user_formals[);
static YYRESULTTAG
-yyresolveStates (yyGLRState* yys, int yyn, yyGLRStack* yystack)
+yyresolveStates (yyGLRState* yys, int yyn, yyGLRStack* yystack]b4_user_formals[)
{
YYRESULTTAG yyflag;
- if (yyn > 0)
+ if (0 < yyn)
{
- assert (yys->yypred != NULL);
- yyflag = yyresolveStates (yys->yypred, yyn-1, yystack);
+ if (yys->yypred == NULL)
+ abort ();
+ yyflag = yyresolveStates (yys->yypred, yyn-1, yystack]b4_user_args[);
if (yyflag != yyok)
return yyflag;
if (! yys->yyresolved)
{
yyflag = yyresolveValue (yys->yysemantics.yyfirstVal, yystack,
- &yys->yysemantics.yysval, &yys->yyloc);
+ &yys->yysemantics.yysval, &yys->yyloc
+ ]b4_user_args[);
if (yyflag != yyok)
return yyflag;
yys->yyresolved = yytrue;
static YYRESULTTAG
yyresolveAction (yySemanticOption* yyopt, yyGLRStack* yystack,
- YYSTYPE* yyvalp, YYLTYPE* yylocp)
+ YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[)
{
- yyGLRStackItem yyrhsVals[YYMAXRHS];
- int yynrhs, yyi;
- yyGLRState* yys;
+ yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1];
+ int yynrhs;
yynrhs = yyrhsLength (yyopt->yyrule);
- YYCHK (yyresolveStates (yyopt->yystate, yynrhs, yystack));
- 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),
- yyvalp, yylocp, yystack);
+ YYCHK (yyresolveStates (yyopt->yystate, yynrhs, yystack]b4_user_args[));
+ yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred = yyopt->yystate;
+ return yyuserAction (yyopt->yyrule, yynrhs,
+ yyrhsVals + YYMAXRHS + YYMAXLEFT - 1,
+ yyvalp, yylocp, yystack]b4_user_args[);
}
#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;
yyGLRState* yys;
yyGLRState* yystates[YYMAXRHS];
+ yyGLRState yyleftmost_state;
- for (yyi = yynrhs, yys = yyx->yystate; yyi > 0; yyi -= 1, yys = yys->yypred)
+ for (yyi = yynrhs, yys = yyx->yystate; 0 < yyi; yyi -= 1, yys = yys->yypred)
yystates[yyi] = yys;
if (yys == NULL)
- yystates[0] = &YYLEFTMOST_STATE;
+ {
+ yyleftmost_state.yyposn = 0;
+ yystates[0] = &yyleftmost_state;
+ }
else
yystates[0] = yys;
- if (yys->yyposn+1 > yyx->yystate->yyposn)
+ if (yyx->yystate->yyposn < yys->yyposn + 1)
YYFPRINTF (stderr, "%*s%s -> <Rule %d, empty>\n",
yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)),
yyx->yyrule);
static void
yyreportAmbiguity (yySemanticOption* yyx0, yySemanticOption* yyx1,
- yyGLRStack* yystack)
+ yyGLRStack* yystack]b4_pure_formals[)
{
/* `Unused' warnings. */
(void) yyx0;
yyreportTree (yyx1, 2);
YYFPRINTF (stderr, "\n");
#endif
- yyFail (yystack, "ambiguity detected");
+ yyFail (yystack][]b4_pure_args[, "ambiguity detected");
}
* actions, and return the result. */
static YYRESULTTAG
yyresolveValue (yySemanticOption* yyoptionList, yyGLRStack* yystack,
- YYSTYPE* yyvalp, YYLTYPE* yylocp)
+ YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[)
{
yySemanticOption* yybest;
yySemanticOption* yyp;
switch (yypreference (yybest, yyp))
{
case 0:
- yyreportAmbiguity (yybest, yyp, yystack);
+ yyreportAmbiguity (yybest, yyp, yystack]b4_pure_args[);
break;
case 1:
yymerge = 1;
if (yymerge)
{
int yyprec = yydprec[yybest->yyrule];
- YYCHK (yyresolveAction (yybest, yystack, yyvalp, yylocp));
+ YYCHK (yyresolveAction (yybest, yystack, yyvalp, yylocp]b4_user_args[));
for (yyp = yybest->yynext; yyp != NULL; yyp = yyp->yynext)
{
if (yyprec == yydprec[yyp->yyrule])
{
YYSTYPE yyval1;
YYLTYPE yydummy;
- YYCHK (yyresolveAction (yyp, yystack, &yyval1, &yydummy));
+ YYCHK (yyresolveAction (yyp, yystack, &yyval1, &yydummy]b4_user_args[));
*yyvalp = yyuserMerge (yymerger[yyp->yyrule], yyvalp, &yyval1);
}
}
return yyok;
}
else
- return yyresolveAction (yybest, yystack, yyvalp, yylocp);
+ return yyresolveAction (yybest, yystack, yyvalp, yylocp]b4_user_args[);
}
static YYRESULTTAG
-yyresolveStack (yyGLRStack* yystack)
+yyresolveStack (yyGLRStack* yystack]b4_user_formals[)
{
if (yystack->yysplitPoint != NULL)
{
for (yyn = 0, yys = yystack->yytops.yystates[0];
yys != yystack->yysplitPoint;
yys = yys->yypred, yyn += 1)
- ;
- YYCHK (yyresolveStates (yystack->yytops.yystates[0], yyn, yystack));
+ continue;
+ YYCHK (yyresolveStates (yystack->yytops.yystates[0], yyn, yystack
+ ]b4_user_args[));
}
return yyok;
}
static YYRESULTTAG
yyprocessOneStack (yyGLRStack* yystack, int yyk,
- size_t yyposn, YYSTYPE* yylvalp, YYLTYPE* yyllocp)
+ size_t yyposn, YYSTYPE* yylvalp, YYLTYPE* yyllocp
+ ]b4_user_formals[)
{
int yyaction;
const short* yyconflicts;
while (yystack->yytops.yystates[yyk] != NULL)
{
yyStateNum yystate = yystack->yytops.yystates[yyk]->yylrState;
+ YYDPRINTF ((stderr, "Stack %d Entering state %d\n", yyk, yystate));
- assert (yystate != YYFINAL);
+ if (yystate == YYFINAL)
+ abort ();
if (yyisDefaultedState (yystate))
{
yyrule = yydefaultAction (yystate);
yymarkStackDeleted (yystack, yyk);
return yyok;
}
- YYCHK (yyglrReduce (yystack, yyk, yyrule, yyfalse));
+ YYCHK (yyglrReduce (yystack, yyk, yyrule, yyfalse]b4_lpure_args[));
}
else
{
if (*yytokenp == YYEMPTY)
{
+ YYDPRINTF ((stderr, "Reading a token: "));
yychar = YYLEX;
- *yytokenp = YYTRANSLATE(yychar);
- YYDPRINTF ((stderr, "Read token %s\n", yytokenName (*yytokenp)));
+ *yytokenp = YYTRANSLATE (yychar);
+ YYDSYMPRINTF ("Next token is", *yytokenp, yylvalp, yyllocp);
}
yygetLRActions (yystate, *yytokenp, &yyaction, &yyconflicts);
int yynewStack = yysplitStack (yystack, yyk);
YYDPRINTF ((stderr, "Splitting off stack %d from %d.\n",
yynewStack, yyk));
- YYCHK (yyglrReduce (yystack, yynewStack, *yyconflicts, yyfalse));
+ YYCHK (yyglrReduce (yystack, yynewStack,
+ *yyconflicts, yyfalse]b4_lpure_args[));
YYCHK (yyprocessOneStack (yystack, yynewStack, yyposn,
- yylvalp, yyllocp));
+ yylvalp, yyllocp]b4_user_args[));
yyconflicts += 1;
}
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);
+ yyglrShift (yystack, yyk, yyaction, yyposn+1,
+ *yylvalp, yyllocp]b4_user_args[);
YYDPRINTF ((stderr, "which is now in state #%d\n",
yystack->yytops.yystates[yyk]->yylrState));
break;
break;
}
else
- YYCHK (yyglrReduce (yystack, yyk, -yyaction, yyfalse));
+ YYCHK (yyglrReduce (yystack, yyk, -yyaction, yyfalse]b4_lpure_args[));
}
}
return yyok;
}
static void
-yyreportParseError (yyGLRStack* yystack, YYSTYPE* yylvalp, YYLTYPE* yyllocp)
+yyreportSyntaxError (yyGLRStack* yystack,
+ YYSTYPE* yylvalp, YYLTYPE* yyllocp]b4_user_formals[)
{
/* `Unused' warnings. */
(void) yylvalp;
{
#if YYERROR_VERBOSE
yySymbol* const yytokenp = yystack->yytokenp;
- int yyn, yyx, yycount;
- size_t yysize;
- const char* yyprefix;
- char* yyp;
- char* yymsg;
+ int yyn;
yyn = yypact[yystack->yytops.yystates[0]->yylrState];
if (YYPACT_NINF < yyn && yyn < YYLAST)
{
- yycount = 0;
+ size_t yysize = 0;
+ const char* yyprefix;
+ char* yymsg;
+ int yyx;
+
/* Start YYX at -YYN if negative to avoid negative indexes in
YYCHECK. */
- yysize = sizeof ("parse error, unexpected ")
- + strlen (yytokenName (*yytokenp));
+ int yyxbegin = yyn < 0 ? -yyn : 0;
+
+ /* Stay within bounds of both yycheck and yytname. */
+ int yychecklim = YYLAST - yyn;
+ int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
+ int yycount = 0;
+
yyprefix = ", expecting ";
- for (yyx = yyn < 0 ? -yyn : 0; yyx < yytname_size && yycount <= 5;
- yyx += 1)
+ for (yyx = yyxbegin; yyx < yyxend; ++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",
- yytokenName (*yytokenp));
- if (yycount < 5)
- {
- yyprefix = ", expecting ";
- for (yyx = yyn < 0 ? -yyn : 0; yyx < yytname_size; yyx += 1)
- if (yycheck[yyx + yyn] == yyx)
+ {
+ yysize += strlen (yyprefix) + strlen (yytokenName (yyx));
+ yycount += 1;
+ if (yycount == 5)
{
- yyp += sprintf (yyp, "%s%s", yyprefix, yytokenName (yyx));
- yyprefix = " or ";
+ yysize = 0;
+ break;
}
+ yyprefix = " or ";
+ }
+ yysize += (sizeof ("syntax error, unexpected ")
+ + strlen (yytokenName (*yytokenp)));
+ yymsg = (char*) malloc (yysize);
+ if (yymsg != 0)
+ {
+ char* yyp = yymsg;
+ sprintf (yyp, "syntax error, unexpected %s",
+ yytokenName (*yytokenp));
+ yyp += strlen (yyp);
+ if (yycount < 5)
+ {
+ yyprefix = ", expecting ";
+ for (yyx = yyxbegin; yyx < yyxend; ++yyx)
+ if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
+ {
+ sprintf (yyp, "%s%s", yyprefix, yytokenName (yyx));
+ yyp += strlen (yyp);
+ yyprefix = " or ";
+ }
+ }
+ yyerror (]b4_lyyerror_args[yymsg);
+ free (yymsg);
}
- yyerror (yymsg);
- free (yymsg);
+ else
+ yyerror (]b4_lyyerror_args["syntax error; also virtual memory exhausted");
}
else
-#endif
- yyerror ("parse error");
+#endif /* YYERROR_VERBOSE */
+ yyerror (]b4_lyyerror_args["syntax error");
yynerrs += 1;
}
}
-/* 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. */
+ value, and location of the lookahead. */
static void
-yyrecoverParseError (yyGLRStack* yystack, YYSTYPE* yylvalp, YYLTYPE* yyllocp)
+yyrecoverSyntaxError (yyGLRStack* yystack,
+ YYSTYPE* yylvalp, YYLTYPE* yyllocp]b4_user_formals[)
{
yySymbol* const yytokenp = yystack->yytokenp;
size_t yyk;
int yyj;
- 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 {
+ 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);
+ {
+ /* Now pop stack until empty and fail. */
+ while (yystack->yytops.yystates[0] != NULL)
+ {
+ yyGLRState *yys = yystack->yytops.yystates[0];
+ YYDSYMPRINTF ("Error: popping",
+ yystos[yys->yylrState],
+ &yys->yysemantics.yysval, &yys->yyloc);
+ yydestruct (yystos[yys->yylrState],
+ &yys->yysemantics.yysval]b4_location_if([, &yys->yyloc])[);
+ yystack->yytops.yystates[0] = yys->yypred;
+ yystack->yynextFree -= 1;
+ yystack->yyspaceLeft += 1;
+ }
+ yyFail (yystack][]b4_lpure_args[, NULL);
+ }
if (*yytokenp != YYEMPTY)
- YYDPRINTF ((stderr, "Discarding token %s\n",
- yytokenName (*yytokenp)));
+ {
+ YYDSYMPRINTF ("Error: discarding", *yytokenp, yylvalp, yyllocp);
+ yydestruct (*yytokenp, yylvalp]b4_location_if([, yyllocp])[);
+ }
+ YYDPRINTF ((stderr, "Reading a token: "));
yychar = YYLEX;
*yytokenp = YYTRANSLATE (yychar);
- YYDPRINTF ((stderr, "Read token %s\n", yytokenName (*yytokenp)));
+ YYDSYMPRINTF ("Next token is", *yytokenp, yylvalp, yyllocp);
yyj = yypact[yystack->yytops.yystates[0]->yylrState];
- if (yyj == YYPACT_NINF)
- /* Something's not right; we shouldn't be here */
- yyFail (yystack, NULL);
+ if (yyis_pact_ninf (yyj))
+ return;
yyj += *yytokenp;
- if (yyj < 0 || yyj > YYLAST || yycheck[yyj] != *yytokenp)
+ if (yyj < 0 || YYLAST < yyj || yycheck[yyj] != *yytokenp)
{
if (yydefact[yystack->yytops.yystates[0]->yylrState] != 0)
return;
}
- else if (yytable[yyj] != 0 && yytable[yyj] != YYTABLE_NINF)
+ else if (yytable[yyj] != 0 && ! yyis_table_ninf (yytable[yyj]))
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;
if (yyk >= yystack->yytops.yysize)
- yyFail (yystack, NULL);
+ yyFail (yystack][]b4_lpure_args[, NULL);
for (yyk += 1; yyk < yystack->yytops.yysize; yyk += 1)
yymarkStackDeleted (yystack, yyk);
yyremoveDeletes (yystack);
yycompressStack (yystack);
/* Now pop stack until we find a state that shifts the error token. */
+ yystack->yyerrState = 3;
while (yystack->yytops.yystates[0] != NULL)
{
- yyj = yypact[yystack->yytops.yystates[0]->yylrState] + YYTERROR;
- if (yyj != YYPACT_NINF + YYTERROR && yyj >= 0 && yyj <= YYLAST &&
- yycheck[yyj] == YYTERROR && yyisShiftAction (yytable[yyj]))
+ yyGLRState *yys = yystack->yytops.yystates[0];
+ yyj = yypact[yys->yylrState];
+ if (! yyis_pact_ninf (yyj))
{
- yyglrShift (yystack, 0, yytable[yyj],
- yystack->yytops.yystates[0]->yyposn, *yylvalp, yyllocp);
- break;
+ yyj += YYTERROR;
+ if (0 <= yyj && yyj <= YYLAST && yycheck[yyj] == YYTERROR
+ && yyisShiftAction (yytable[yyj]))
+ {
+ YYDPRINTF ((stderr, "Shifting error token, "));
+ yyglrShift (yystack, 0, yytable[yyj],
+ yys->yyposn, *yylvalp, yyllocp]b4_user_args[);
+ break;
+ }
}
- yystack->yytops.yystates[0] = yystack->yytops.yystates[0]->yypred;
+ YYDSYMPRINTF ("Error: popping",
+ yystos[yys->yylrState],
+ &yys->yysemantics.yysval, &yys->yyloc);
+ yydestruct (yystos[yys->yylrState],
+ &yys->yysemantics.yysval]b4_location_if([, &yys->yyloc])[);
+ yystack->yytops.yystates[0] = yys->yypred;
yystack->yynextFree -= 1;
yystack->yyspaceLeft += 1;
}
if (yystack->yytops.yystates[0] == NULL)
- yyFail (yystack, NULL);
+ yyFail (yystack][]b4_lpure_args[, NULL);
}
#define YYCHK1(YYE) \
} \
} while (0)
-int
-yyparse (YYPARSE_PARAM_ARG)
+
+/*----------.
+| yyparse. |
+`----------*/
+
+]b4_c_ansi_function_def([yyparse], [int], b4_parse_param)[
{
yySymbol yytoken;
yyGLRStack yystack;
yyinitGLRStack (&yystack, YYINITDEPTH);
yystack.yytokenp = &yytoken;
+ YYDPRINTF ((stderr, "Starting parse\n"));
+
if (setjmp (yystack.yyexception_buffer) != 0)
goto yyDone;
- yyglrShift (&yystack, 0, 0, 0, yyval_default, &yyloc_default);
+ yyglrShift (&yystack, 0, 0, 0, yyval_default, &yyloc_default]b4_user_args[);
yytoken = YYEMPTY;
yyposn = 0;
while (yytrue)
{
- /* For efficiency, we have two loops, of which the first of which
- * is specialized to deterministic operation (single stack, no
- * potential ambiguity). */
-
+ /* For efficiency, we have two loops, the first of which is
+ specialized to deterministic operation (single stack, no
+ potential ambiguity). */
/* Standard mode */
while (yytrue)
{
const short* yyconflicts;
yyStateNum yystate = yystack.yytops.yystates[0]->yylrState;
+ YYDPRINTF ((stderr, "Entering state %d\n", yystate));
if (yystate == YYFINAL)
goto yyDone;
if (yyisDefaultedState (yystate))
yyrule = yydefaultAction (yystate);
if (yyrule == 0)
{
- yyreportParseError (&yystack, yylvalp, yyllocp);
+ yyreportSyntaxError (&yystack, yylvalp, yyllocp]b4_user_args[);
goto yyuser_error;
}
- YYCHK1 (yyglrReduce (&yystack, 0, yyrule, yytrue));
+ YYCHK1 (yyglrReduce (&yystack, 0, yyrule, yytrue]b4_lpure_args[));
}
else
{
if (yytoken == YYEMPTY)
{
+ YYDPRINTF ((stderr, "Reading a token: "));
yychar = YYLEX;
yytoken = YYTRANSLATE (yychar);
- YYDPRINTF ((stderr, "Read token %s\n",
- yytokenName (yytoken)));
+ YYDSYMPRINTF ("Next token is", yytoken, yylvalp, yyllocp);
}
yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts);
if (*yyconflicts != 0)
break;
if (yyisShiftAction (yyaction))
{
- YYDPRINTF ((stderr, "Shifted token %s. ",
+ YYDPRINTF ((stderr, "Shifting token %s, ",
yytokenName (yytoken)));
if (yytoken != YYEOF)
yytoken = YYEMPTY;
yyposn += 1;
- yyglrShift (&yystack, 0, yyaction, yyposn, yylval, yyllocp);
- if (yystack.yyerrState > 0)
+ yyglrShift (&yystack, 0, yyaction, yyposn,
+ yylval, yyllocp]b4_user_args[);
+ if (0 < yystack.yyerrState)
yystack.yyerrState -= 1;
- YYDPRINTF ((stderr, "Now in state #%d\n",
- yystack.yytops.yystates[0]->yylrState));
}
else if (yyisErrorAction (yyaction))
{
- yyreportParseError (&yystack, yylvalp, yyllocp);
+ yyreportSyntaxError (&yystack, yylvalp, yyllocp]b4_user_args[);
goto yyuser_error;
}
else
- YYCHK1 (yyglrReduce (&yystack, 0, -yyaction, yytrue));
+ YYCHK1 (yyglrReduce (&yystack, 0, -yyaction, yytrue]b4_lpure_args[));
}
}
int yyn = yystack.yytops.yysize;
for (yys = 0; yys < yyn; yys += 1)
YYCHK1 (yyprocessOneStack (&yystack, yys, yyposn,
- yylvalp, yyllocp));
+ yylvalp, yyllocp]b4_user_args[));
yytoken = YYEMPTY;
yyposn += 1;
yyremoveDeletes (&yystack);
{
yyundeleteLastStack (&yystack);
if (yystack.yytops.yysize == 0)
- yyFail (&yystack, "parse error");
- YYCHK1 (yyresolveStack (&yystack));
+ yyFail (&yystack][]b4_lpure_args[, "syntax error");
+ YYCHK1 (yyresolveStack (&yystack]b4_user_args[));
YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));
- yyreportParseError (&yystack, yylvalp, yyllocp);
+ yyreportSyntaxError (&yystack, yylvalp, yyllocp]b4_user_args[);
goto yyuser_error;
}
else if (yystack.yytops.yysize == 1)
{
- YYCHK1 (yyresolveStack (&yystack));
+ YYCHK1 (yyresolveStack (&yystack]b4_user_args[));
YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));
yycompressStack (&yystack);
break;
}
continue;
yyuser_error:
- yyrecoverParseError (&yystack, yylvalp, yyllocp);
+ yyrecoverSyntaxError (&yystack, yylvalp, yyllocp]b4_user_args[);
yyposn = yystack.yytops.yystates[0]->yyposn;
}
yyDone:
yy_yypstack (yys->yypred);
fprintf (stderr, " -> ");
}
- fprintf (stderr, "%d@%lu", yys->yylrState, (unsigned long) yys->yyposn);
+ fprintf (stderr, "%d@@%lu", yys->yylrState, (unsigned long) yys->yyposn);
}
static void
for (yyp = yystack->yyitems; yyp < yystack->yynextFree; yyp += 1)
{
fprintf (stderr, "%3lu. ", (unsigned long) (yyp - yystack->yyitems));
- if (*(bool*) yyp)
+ if (*(yybool *) yyp)
{
fprintf (stderr, "Res: %d, LR State: %d, posn: %lu, pred: %ld",
yyp->yystate.yyresolved, yyp->yystate.yylrState,
(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
+[@output @output_header_name@
+b4_copyright([Skeleton parser for GLR parsing with Bison], [2002, 2003])
b4_token_defines(b4_tokens)
-#ifndef YYSTYPE
+#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED)
m4_ifdef([b4_stype],
-[#line b4_stype_line "b4_filename"
-typedef union b4_stype yystype;
-/* Line __line__ of __file__. */
-#line __oline__ "__ofile__"],
-[typedef int yystype;])
-# define YYSTYPE yystype
+[b4_syncline([b4_stype_line], [b4_filename])
+typedef union m4_bregexp(b4_stype, [^{], [YYSTYPE ])b4_stype YYSTYPE;
+/* Line __line__ of glr.c. */
+b4_syncline([@oline@], [@ofile@])],
+[typedef int YYSTYPE;])
+# define YYSTYPE_IS_DECLARED 1
+# define YYSTYPE_IS_TRIVIAL 1
#endif
b4_pure_if([],
[extern YYSTYPE b4_prefix[]lval;])
-b4_location_if(
-[#ifndef YYLTYPE
-typedef struct yyltype
+#if ! defined (YYLTYPE) && ! defined (YYLTYPE_IS_DECLARED)
+typedef struct YYLTYPE
{
- int yyfirst_line;
- int yyfirst_column;
- int yylast_line;
- int yylast_column;
-} yyltype;
-# define YYLTYPE yyltype
+b4_location_if([
+ int first_line;
+ int first_column;
+ int last_line;
+ int last_column;
+])
+} YYLTYPE;
+# define YYLTYPE_IS_DECLARED 1
+# define YYLTYPE_IS_TRIVIAL 1
#endif
-m4_if(b4_pure, [0],
+b4_location_if([m4_if(b4_pure, [0],
[extern YYLTYPE b4_prefix[]lloc;])
])
-#endif /* not b4_header_guard */
])
projects / bison.git / blobdiff