m4_divert(-1) -*- C -*-
# GLR skeleton for Bison
-# Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# 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
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301 USA
+m4_include(b4_pkgdatadir/[c.m4])
+
## ---------------- ##
## Default values. ##
## ---------------- ##
## ------------------------ ##
+# b4_user_formals
+# ---------------
+# The possible parse-params formal arguments preceded by a comma.
+#
+# This is not shared with yacc.c in c.m4 because GLR relies on ISO C
+# formal argument declarations.
+m4_define([b4_user_formals],
+[m4_ifset([b4_parse_param], [, b4_c_ansi_formals(b4_parse_param)])])
+
+
# 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_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl
+b4_location_if([, [[YYLTYPE *], [&yylloc]]])])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.
+# Optional effective arguments passed to yyerror: user args plus yylloc, and
+# a trailing comma.
m4_define([b4_yyerror_args],
[b4_pure_if([b4_location_if([yylocp, ])])dnl
m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
# b4_lyyerror_args
# ----------------
-# Same as above, but on the look-ahead, hence yyllocp instead of yylocp.
+# Same as above, but on the look-ahead, hence &yylloc instead of yylocp.
m4_define([b4_lyyerror_args],
-[b4_pure_if([b4_location_if([yyllocp, ])])dnl
+[b4_pure_if([b4_location_if([&yylloc, ])])dnl
m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
# b4_pure_args
# ------------
-# Arguments needed by yyerror: user args plus yylloc.
+# Same as b4_yyerror_args, but with a leading comma.
m4_define([b4_pure_args],
[b4_pure_if([b4_location_if([, yylocp])])[]b4_user_args])
-# b4_pure_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 look-ahead, hence yyllocp instead of yylocp.
+# Same as above, but on the look-ahead, hence &yylloc instead of yylocp.
m4_define([b4_lpure_args],
-[b4_pure_if([b4_location_if([, yyllocp])])[]b4_user_args])
+[b4_pure_if([b4_location_if([, &yylloc])])[]b4_user_args])
-# b4_lpure_formals
-# ----------------
-# Same as above, but on the look-ahead, hence yyllocp instead of yylocp.
-m4_define([b4_lpure_formals],
-[b4_pure_if([b4_location_if([YYLTYPE *yyllocp])])[]b4_user_formals])
+# b4_pure_formals
+# ---------------
+# Arguments passed to yyerror: user formals plus yylocp.
+m4_define([b4_pure_formals],
+[b4_pure_if([b4_location_if([, YYLTYPE *yylocp])])[]b4_user_formals])
## ----------------- ##
# --------------------
# Expansion of $<TYPE>$.
m4_define([b4_lhs_value],
-[(*yyvalp)[]m4_ifval([$1], [.$1])])
+[((*yyvalp)[]m4_ifval([$1], [.$1]))])
# b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
# Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
# symbols on RHS.
m4_define([b4_rhs_value],
-[((yyGLRStackItem const *)yyvsp)@{YYFILL (m4_eval([$2 - $1]))@}.yystate.yysemantics.yysval[]m4_ifval([$3], [.$3])])
+[(((yyGLRStackItem const *)yyvsp)@{YYFILL (($2) - ($1))@}.yystate.yysemantics.yysval[]m4_ifval([$3], [.$3]))])
# Expansion of @NUM, where the current rule has RULE-LENGTH symbols
# on RHS.
m4_define([b4_rhs_location],
-[((yyGLRStackItem const *)yyvsp)@{YYFILL (m4_eval([$2 - $1]))@}.yystate.yyloc])
+[(((yyGLRStackItem const *)yyvsp)@{YYFILL (($2) - ($1))@}.yystate.yyloc)])
+
+
+
+## -------------- ##
+## Output files. ##
+## -------------- ##
# We do want M4 expansion after # for CPP macros.
m4_changecom()
m4_divert(0)dnl
@output @output_parser_name@
-b4_copyright([Skeleton parser for GLR parsing with Bison], [2002, 2003, 2004])
+b4_copyright([Skeleton parser for GLR parsing with Bison],
+ [2002, 2003, 2004, 2005, 2006])
[
-/* This is the parser code for GLR (Generalized LR) parser. */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <stdarg.h>
-#include <setjmp.h>
+/* This is the parser code for GLR (Generalized LR) parser. */
]b4_identification
+
m4_if(b4_prefix[], [yy], [],
-[/* If NAME_PREFIX is specified substitute the variables and functions
- names. */
+[/* Substitute the variable and function names. */
#define yyparse b4_prefix[]parse
#define yylex b4_prefix[]lex
#define yyerror b4_prefix[]error
#define yychar b4_prefix[]char
#define yydebug b4_prefix[]debug
#define yynerrs b4_prefix[]nerrs
-#define yylloc b4_prefix[]lloc])
+#define yylloc b4_prefix[]lloc])
-b4_token_defines(b4_tokens)
+dnl # b4_shared_declarations
+dnl # ----------------------
+dnl # Declaration that might either go into the header (if --defines)
+dnl # or open coded in the parser body.
+m4_define([b4_shared_declarations],
+[b4_token_enums(b4_tokens)[
/* Copy the first part of user declarations. */
-b4_pre_prologue[
+]b4_pre_prologue[
-/* Enabling traces. */
-#ifndef YYDEBUG
-# define YYDEBUG ]b4_debug[
-#endif
-
-/* Enabling verbose error messages. */
-#ifdef YYERROR_VERBOSE
-# undef YYERROR_VERBOSE
-# define YYERROR_VERBOSE 1
-#else
-# define YYERROR_VERBOSE ]b4_error_verbose[
-#endif
-
-#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED)
+#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
]m4_ifdef([b4_stype],
-[b4_syncline([b4_stype_line], [b4_filename])
-typedef union m4_bregexp(b4_stype, [^{], [YYSTYPE ])b4_stype YYSTYPE;
+[typedef union m4_bregexp(b4_stype, [^{], [YYSTYPE ])
+b4_stype
/* Line __line__ of glr.c. */
-b4_syncline([@oline@], [@ofile@])],
+b4_syncline([@oline@], [@ofile@])
+ YYSTYPE;],
[typedef int YYSTYPE;])[
# define YYSTYPE_IS_DECLARED 1
# define YYSTYPE_IS_TRIVIAL 1
#endif
-#if ! defined (YYLTYPE) && ! defined (YYLTYPE_IS_DECLARED)
+#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
typedef struct YYLTYPE
{
]b4_location_if([
# define YYLTYPE_IS_DECLARED 1
# define YYLTYPE_IS_TRIVIAL 1
#endif
+]])
+
+m4_if(b4_defines_flag, 0,
+ [b4_shared_declarations],
+ [#include @output_header_name@])[
+
+/* Enabling traces. */
+#ifndef YYDEBUG
+# define YYDEBUG ]b4_debug[
+#endif
+
+/* Enabling verbose error messages. */
+#ifdef YYERROR_VERBOSE
+# undef YYERROR_VERBOSE
+# define YYERROR_VERBOSE 1
+#else
+# define YYERROR_VERBOSE ]b4_error_verbose[
+#endif
+
+/* Enabling the token table. */
+#ifndef YYTOKEN_TABLE
+# define YYTOKEN_TABLE ]b4_token_table[
+#endif
/* Default (constant) value used for initialization for null
right-hand sides. Unlike the standard yacc.c template,
here we set the default value of $$ to a zeroed-out value.
Since the default value is undefined, this behavior is
- technically correct. */
+ technically correct. */
static YYSTYPE yyval_default;
/* Copy the second part of user declarations. */
]/* Line __line__ of glr.c. */
b4_syncline([@oline@], [@ofile@])
[
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+
+#ifndef YY_
+# if YYENABLE_NLS
+# if ENABLE_NLS
+# include <libintl.h> /* INFRINGES ON USER NAME SPACE */
+# define YY_(msgid) dgettext ("bison-runtime", msgid)
+# endif
+# endif
+# ifndef YY_
+# define YY_(msgid) msgid
+# endif
+#endif
+
+/* Suppress unused-variable warnings by "using" E. */
+#if ! defined lint || defined __GNUC__
+# define YYUSE(e) ((void) (e))
+#else
+# define YYUSE(e) /* empty */
+#endif
+
+/* Identity function, used to suppress warnings about constant conditions. */
+#ifndef lint
+# define YYID(n) (n)
+#else
+]b4_c_function_def([YYID], [static int], [[int i], [i]])[
+{
+ return i;
+}
+#endif
+
#ifndef YYFREE
# define YYFREE free
#endif
# define YYREALLOC realloc
#endif
+#define YYSIZEMAX ((size_t) -1)
+
#ifdef __cplusplus
typedef bool yybool;
#else
#define yytrue 1
#define yyfalse 0
+#ifndef YYSETJMP
+# include <setjmp.h>
+# define YYJMP_BUF jmp_buf
+# define YYSETJMP(env) setjmp (env)
+# define YYLONGJMP(env, val) longjmp (env, val)
+#endif
+
/*-----------------.
| 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__
+# if (! defined __GNUC__ || __GNUC__ < 2 \
+ || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__)
# define __attribute__(Spec) /* empty */
# endif
#endif
+]b4_location_if([#define YYOPTIONAL_LOC(Name) Name],[
+#ifdef __cplusplus
+# define YYOPTIONAL_LOC(Name) /* empty */
+#else
+# define YYOPTIONAL_LOC(Name) Name __attribute__ ((__unused__))
+#endif])[
+
#ifndef YYASSERT
# define YYASSERT(condition) ((void) ((condition) || (abort (), 0)))
#endif
-#ifndef ATTRIBUTE_UNUSED
-# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
-#endif
-
-/* YYFINAL -- State number of the termination state. */
+/* YYFINAL -- State number of the termination state. */
#define YYFINAL ]b4_final_state_number[
/* YYLAST -- Last index in YYTABLE. */
#define YYLAST ]b4_last[
-/* YYNTOKENS -- Number of terminals. */
+/* YYNTOKENS -- Number of terminals. */
#define YYNTOKENS ]b4_tokens_number[
-/* YYNNTS -- Number of nonterminals. */
+/* YYNNTS -- Number of nonterminals. */
#define YYNNTS ]b4_nterms_number[
-/* YYNRULES -- Number of rules. */
+/* YYNRULES -- Number of rules. */
#define YYNRULES ]b4_rules_number[
-/* YYNRULES -- Number of states. */
+/* YYNRULES -- Number of states. */
#define YYNSTATES ]b4_states_number[
-/* YYMAXRHS -- Maximum number of symbols on right-hand side of rule. */
+/* YYMAXRHS -- Maximum number of symbols on right-hand side of rule. */
#define YYMAXRHS ]b4_r2_max[
/* YYMAXLEFT -- Maximum number of symbols to the left of a handle
- accessed by $0, $-1, etc., in any rule. */
+ accessed by $0, $-1, etc., in any rule. */
#define YYMAXLEFT ]b4_max_left_semantic_context[
/* YYTRANSLATE(X) -- Bison symbol number corresponding to X. */
]b4_prhs[
};
-/* YYRHS -- A `-1'-separated list of the rules' RHS. */
+/* YYRHS -- A `-1'-separated list of the rules' RHS. */
static const ]b4_int_type_for([b4_rhs])[ yyrhs[] =
{
]b4_rhs[
};
#endif
-#if (YYDEBUG) || YYERROR_VERBOSE
-/* YYTNME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
- First, the terminals, then, starting at YYNTOKENS, nonterminals. */
+#if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
+/* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
+ First, the terminals, then, starting at YYNTOKENS, nonterminals. */
static const char *const yytname[] =
{
]b4_tname[
]b4_r2[
};
-/* YYDPREC[RULE-NUM] -- Dynamic precedence of rule #RULE-NUM (0 if none). */
+/* YYDPREC[RULE-NUM] -- Dynamic precedence of rule #RULE-NUM (0 if none). */
static const ]b4_int_type_for([b4_dprec])[ yydprec[] =
{
]b4_dprec[
};
-/* YYMERGER[RULE-NUM] -- Index of merging function for rule #RULE-NUM. */
+/* YYMERGER[RULE-NUM] -- Index of merging function for rule #RULE-NUM. */
static const ]b4_int_type_for([b4_merger])[ yymerger[] =
{
]b4_merger[
]b4_defact[
};
-/* YYPDEFGOTO[NTERM-NUM]. */
+/* YYPDEFGOTO[NTERM-NUM]. */
static const ]b4_int_type_for([b4_defgoto])[ yydefgoto[] =
{
]b4_defgoto[
#ifndef YYLLOC_DEFAULT
# define YYLLOC_DEFAULT(Current, Rhs, N) \
do \
- if (N) \
+ if (YYID (N)) \
{ \
- (Current).first_line = YYRHSLOC(Rhs, 1).first_line; \
- (Current).first_column = YYRHSLOC(Rhs, 1).first_column; \
- (Current).last_line = YYRHSLOC(Rhs, N).last_line; \
- (Current).last_column = YYRHSLOC(Rhs, N).last_column; \
+ (Current).first_line = YYRHSLOC (Rhs, 1).first_line; \
+ (Current).first_column = YYRHSLOC (Rhs, 1).first_column; \
+ (Current).last_line = YYRHSLOC (Rhs, N).last_line; \
+ (Current).last_column = YYRHSLOC (Rhs, N).last_column; \
} \
else \
{ \
(Current).first_line = (Current).last_line = \
- YYRHSLOC(Rhs, 0).last_line; \
+ YYRHSLOC (Rhs, 0).last_line; \
(Current).first_column = (Current).last_column = \
- YYRHSLOC(Rhs, 0).last_column; \
+ YYRHSLOC (Rhs, 0).last_column; \
} \
- while (0)
+ while (YYID (0))
/* YY_LOCATION_PRINT -- Print the location on the stream.
This macro was not mandated originally: define only if we know
# define YY_LOCATION_PRINT(File, Loc) \
fprintf (File, "%d.%d-%d.%d", \
- (Loc).first_line, (Loc).first_column, \
- (Loc).last_line, (Loc).last_column)
+ (Loc).first_line, (Loc).first_column, \
+ (Loc).last_line, (Loc).last_column)
#endif
]],[
#ifndef YYLLOC_DEFAULT
]b4_pure_if(
[
#undef yynerrs
-#define yynerrs (yystack->yyerrcnt)
+#define yynerrs (yystackp->yyerrcnt)
#undef yychar
-#define yychar (yystack->yyrawchar)],
+#define yychar (yystackp->yyrawchar)
+#undef yylval
+#define yylval (yystackp->yyval)
+#undef yylloc
+#define yylloc (yystackp->yyloc)
+m4_if(b4_prefix[], [yy], [],
+[#define b4_prefix[]nerrs yynerrs
+#define b4_prefix[]char yychar
+#define b4_prefix[]lval yylval
+#define b4_prefix[]lloc yylloc])],
[YYSTYPE yylval;
YYLTYPE yylloc;
#define YYCHK(YYE) \
do { YYRESULTTAG yyflag = YYE; if (yyflag != yyok) return yyflag; } \
- while (0)
+ while (YYID (0))
#if YYDEBUG
-#if ! defined (YYFPRINTF)
+# ifndef YYFPRINTF
# define YYFPRINTF fprintf
-#endif
+# endif
# define YYDPRINTF(Args) \
do { \
if (yydebug) \
YYFPRINTF Args; \
-} while (0)
+} while (YYID (0))
-]b4_yysymprint_generate([b4_c_ansi_function_def])[
+]b4_yy_symbol_print_generate([b4_c_ansi_function_def])[
-# define YY_SYMBOL_PRINT(Title, Type, Value, Location) \
-do { \
- if (yydebug) \
- { \
- YYFPRINTF (stderr, "%s ", Title); \
- yysymprint (stderr, \
- Type, Value]b4_location_if([, Location])[); \
- YYFPRINTF (stderr, "\n"); \
- } \
-} while (0)
+# define YY_SYMBOL_PRINT(Title, Type, Value, Location) \
+do { \
+ if (yydebug) \
+ { \
+ YYFPRINTF (stderr, "%s ", Title); \
+ yy_symbol_print (stderr, Type, \
+ Value]b4_location_if([, Location])[]b4_user_args[); \
+ YYFPRINTF (stderr, "\n"); \
+ } \
+} while (YYID (0))
/* Nonzero means print parse trace. It is left uninitialized so that
multiple parsers can coexist. */
SIZE_MAX < YYMAXDEPTH * sizeof (GLRStackItem)
evaluated with infinite-precision integer arithmetic. */
-#if YYMAXDEPTH == 0
-# undef YYMAXDEPTH
-#endif
-
#ifndef YYMAXDEPTH
# define YYMAXDEPTH ]b4_stack_depth_max[
#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
+ to be completed by functions that call yyexpandGLRStack before the
stack is expanded, thus insuring that all necessary pointers get
- properly redirected to new data. */
+ properly redirected to new data. */
#define YYHEADROOM 2
-#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
+#ifndef YYSTACKEXPANDABLE
+# if (! defined __cplusplus \
+ || (]b4_location_if([[defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL \
+ && ]])[defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL))
+# define YYSTACKEXPANDABLE 1
+# else
+# define YYSTACKEXPANDABLE 0
+# endif
+#endif
+
+#if YYSTACKEXPANDABLE
+# define YY_RESERVE_GLRSTACK(Yystack) \
+ do { \
+ if (Yystack->yyspaceLeft < YYHEADROOM) \
+ yyexpandGLRStack (Yystack); \
+ } while (YYID (0))
#else
-#define YYSTACKEXPANDABLE 0
+# define YY_RESERVE_GLRSTACK(Yystack) \
+ do { \
+ if (Yystack->yyspaceLeft < YYHEADROOM) \
+ yyMemoryExhausted (Yystack); \
+ } while (YYID (0))
#endif
+
+#if YYERROR_VERBOSE
+
+# ifndef yystpcpy
+# if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE
+# define yystpcpy stpcpy
+# else
+/* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
+ YYDEST. */
+static char *
+yystpcpy (char *yydest, const char *yysrc)
+{
+ char *yyd = yydest;
+ const char *yys = yysrc;
+
+ while ((*yyd++ = *yys++) != '\0')
+ continue;
+
+ return yyd - 1;
+}
+# endif
+# endif
+
+# ifndef yytnamerr
+/* Copy to YYRES the contents of YYSTR after stripping away unnecessary
+ quotes and backslashes, so that it's suitable for yyerror. The
+ heuristic is that double-quoting is unnecessary unless the string
+ contains an apostrophe, a comma, or backslash (other than
+ backslash-backslash). YYSTR is taken from yytname. If YYRES is
+ null, do not copy; instead, return the length of what the result
+ would have been. */
+static size_t
+yytnamerr (char *yyres, const char *yystr)
+{
+ if (*yystr == '"')
+ {
+ size_t yyn = 0;
+ char const *yyp = yystr;
+
+ for (;;)
+ switch (*++yyp)
+ {
+ case '\'':
+ case ',':
+ goto do_not_strip_quotes;
+
+ case '\\':
+ if (*++yyp != '\\')
+ goto do_not_strip_quotes;
+ /* Fall through. */
+ default:
+ if (yyres)
+ yyres[yyn] = *yyp;
+ yyn++;
+ break;
+
+ case '"':
+ if (yyres)
+ yyres[yyn] = '\0';
+ return yyn;
+ }
+ do_not_strip_quotes: ;
+ }
+
+ if (! yyres)
+ return strlen (yystr);
+
+ return yystpcpy (yyres, yystr) - yyres;
+}
+# endif
+
+#endif /* !YYERROR_VERBOSE */
+
/** State numbers, as in LALR(1) machine */
typedef int yyStateNum;
typedef short int yyItemNum;
typedef struct yyGLRState yyGLRState;
+typedef struct yyGLRStateSet yyGLRStateSet;
typedef struct yySemanticOption yySemanticOption;
typedef union yyGLRStackItem yyGLRStackItem;
typedef struct yyGLRStack yyGLRStack;
-typedef struct yyGLRStateSet yyGLRStateSet;
struct yyGLRState {
+ /** Type tag: always true. */
yybool yyisState;
+ /** Type tag for yysemantics. If true, yysval applies, otherwise
+ * yyfirstVal applies. */
yybool yyresolved;
+ /** Number of corresponding LALR(1) machine state. */
yyStateNum yylrState;
+ /** Preceding state in this stack */
yyGLRState* yypred;
+ /** Source position of the first token produced by my symbol */
size_t yyposn;
union {
+ /** First in a chain of alternative reductions producing the
+ * non-terminal corresponding to this state, threaded through
+ * yynext. */
yySemanticOption* yyfirstVal;
+ /** Semantic value for this state. */
YYSTYPE yysval;
} yysemantics;
+ /** Source location for this state. */
YYLTYPE yyloc;
};
struct yyGLRStateSet {
yyGLRState** yystates;
+ /** During nondeterministic operation, yylookaheadNeeds tracks which
+ * stacks have actually needed the current lookahead. During deterministic
+ * operation, yylookaheadNeeds[0] is not maintained since it would merely
+ * duplicate yychar != YYEMPTY. */
+ yybool* yylookaheadNeeds;
size_t yysize, yycapacity;
};
struct yySemanticOption {
+ /** Type tag: always false. */
yybool yyisState;
+ /** Rule number for this reduction */
yyRuleNum yyrule;
+ /** The last RHS state in the list of states to be reduced. */
yyGLRState* yystate;
+ /** The lookahead for this reduction. */
+ int yyrawchar;
+ YYSTYPE yyval;
+ YYLTYPE yyloc;
+ /** Next sibling in chain of options. To facilitate merging,
+ * options are chained in decreasing order by address. */
yySemanticOption* yynext;
};
+/** Type of the items in the GLR stack. The yyisState field
+ * indicates which item of the union is valid. */
union yyGLRStackItem {
yyGLRState yystate;
yySemanticOption yyoption;
};
struct yyGLRStack {
- int yyerrflag;
int yyerrState;
-]b4_location_if([[ /* To compute the location of the error token, */
- yyGLRStackItem yyerror_range[2];]])[
+]b4_location_if([[ /* To compute the location of the error token. */
+ yyGLRStackItem yyerror_range[3];]])[
]b4_pure_if(
[
int yyerrcnt;
int yyrawchar;
+ YYSTYPE yyval;
+ YYLTYPE yyloc;
])[
- yySymbol* yytokenp;
- jmp_buf yyexception_buffer;
+ YYJMP_BUF yyexception_buffer;
yyGLRStackItem* yyitems;
yyGLRStackItem* yynextFree;
- int yyspaceLeft;
+ size_t yyspaceLeft;
yyGLRState* yysplitPoint;
yyGLRState* yylastDeleted;
yyGLRStateSet yytops;
};
-static void yyinitGLRStack (yyGLRStack* yystack, size_t yysize);
-static void yyexpandGLRStack (yyGLRStack* yystack]b4_pure_formals[);
-static void yyfreeGLRStack (yyGLRStack* yystack);
+#if YYSTACKEXPANDABLE
+static void yyexpandGLRStack (yyGLRStack* yystackp);
+#endif
+static void yyFail (yyGLRStack* yystackp]b4_pure_formals[, const char* yymsg)
+ __attribute__ ((__noreturn__));
static void
-yyFail (yyGLRStack* yystack]b4_pure_formals[, const char* yyformat, ...)
+yyFail (yyGLRStack* yystackp]b4_pure_formals[, const char* yymsg)
{
- yystack->yyerrflag = 1;
- if (yyformat != NULL)
- {
- char yymsg[256];
- va_list yyap;
- va_start (yyap, yyformat);
- vsprintf (yymsg, yyformat, yyap);
- yyerror (]b4_yyerror_args[yymsg);
- }
- longjmp (yystack->yyexception_buffer, 1);
+ if (yymsg != NULL)
+ yyerror (]b4_yyerror_args[yymsg);
+ YYLONGJMP (yystackp->yyexception_buffer, 1);
+}
+
+static void yyMemoryExhausted (yyGLRStack* yystackp)
+ __attribute__ ((__noreturn__));
+static void
+yyMemoryExhausted (yyGLRStack* yystackp)
+{
+ YYLONGJMP (yystackp->yyexception_buffer, 2);
}
#if YYDEBUG || YYERROR_VERBOSE
-/** A printable representation of TOKEN. Valid until next call to
- * tokenName. */
+/** A printable representation of TOKEN. */
static inline const char*
yytokenName (yySymbol yytoken)
{
/** 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;
+ * containing the pointer to the next state in the chain. */
+static void yyfillin (yyGLRStackItem *, int, int) __attribute__ ((__unused__));
static void
yyfillin (yyGLRStackItem *yyvsp, int yylow0, int yylow1)
{
}
/* 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. */
+ * 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;
+ __attribute__ ((__unused__));
static inline int
yyfill (yyGLRStackItem *yyvsp, int *yylow, int yylow1, yybool yynormal)
{
/** Perform user action for rule number YYN, with RHS length YYRHSLEN,
* and top stack item YYVSP. YYLVALP points to place to put semantic
* value ($$), and yylocp points to place for location information
- * (@@$). Returns yyok for normal return, yyaccept for YYACCEPT,
- * yyerr for YYERROR, yyabort for YYABORT. */
-static YYRESULTTAG
+ * (@@$). Returns yyok for normal return, yyaccept for YYACCEPT,
+ * yyerr for YYERROR, yyabort for YYABORT. */
+/*ARGSUSED*/ static YYRESULTTAG
yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp,
YYSTYPE* yyvalp,
- YYLTYPE* yylocp]b4_location_if(, [ ATTRIBUTE_UNUSED])[,
- yyGLRStack* yystack
- ]b4_user_formals[)
+ YYLTYPE* YYOPTIONAL_LOC (yylocp),
+ yyGLRStack* yystackp
+ ]b4_user_formals[)
{
- yybool yynormal ATTRIBUTE_UNUSED = (yystack->yysplitPoint == NULL);
+ yybool yynormal __attribute__ ((__unused__)) =
+ (yystackp->yysplitPoint == NULL);
int yylow;
-
-# undef yyerrok
-# define yyerrok (yystack->yyerrState = 0)
+]b4_parse_param_use[]dnl
+[# undef yyerrok
+# define yyerrok (yystackp->yyerrState = 0)
# undef YYACCEPT
# define YYACCEPT return yyaccept
# undef YYABORT
# undef YYERROR
# define YYERROR return yyerrok, yyerr
# undef YYRECOVERING
-# define YYRECOVERING (yystack->yyerrState != 0)
+# define YYRECOVERING (yystackp->yyerrState != 0)
# undef yyclearin
-# define yyclearin (yychar = *(yystack->yytokenp) = YYEMPTY)
+# define yyclearin (yychar = YYEMPTY)
# undef YYFILL
# define YYFILL(N) yyfill (yyvsp, &yylow, N, yynormal)
# undef YYBACKUP
# define YYBACKUP(Token, Value) \
- return yyerror (]b4_yyerror_args["syntax error: cannot back up"), \
+ return yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")), \
yyerrok, yyerr
yylow = 1;
*yyvalp = yyval_default;
else
*yyvalp = yyvsp[YYFILL (1-yyrhslen)].yystate.yysemantics.yysval;
- YYLLOC_DEFAULT (*yylocp, yyvsp - yyrhslen, yyrhslen);
-]
+ YYLLOC_DEFAULT ((*yylocp), (yyvsp - yyrhslen), yyrhslen);
+]b4_location_if([[ yystackp->yyerror_range[1].yystate.yyloc = *yylocp;
+]])[
switch (yyn)
{
- b4_actions
+ ]b4_actions
+/* Line __line__ of glr.c. */
+b4_syncline([@oline@], [@ofile@])[
+ default: break;
}
return yyok;
# undef YYBACKUP
# undef yyclearin
# undef YYRECOVERING
-/* Line __line__ of glr.c. */
-b4_syncline([@oline@], [@ofile@])
}
\f
-static void
+/*ARGSUSED*/ static void
yyuserMerge (int yyn, YYSTYPE* yy0, YYSTYPE* yy1)
{
- /* `Use' the arguments. */
- (void) yy0;
- (void) yy1;
+ YYUSE (yy0);
+ YYUSE (yy1);
switch (yyn)
{
- b4_mergers
+ ]b4_mergers[
+ default: break;
}
}
-[
+
/* Bison grammar-table manipulation. */
]b4_yydestruct_generate([b4_c_ansi_function_def])[
-/** Number of symbols composing the right hand side of rule #RULE. */
+/** Number of symbols composing the right hand side of rule #RULE. */
static inline int
yyrhsLength (yyRuleNum yyrule)
{
return yyr2[yyrule];
}
-/** Left-hand-side symbol for rule #RULE. */
+static void
+yydestroyGLRState (char const *yymsg, yyGLRState *yys]b4_user_formals[)
+{
+ if (yys->yyresolved)
+ yydestruct (yymsg, yystos[yys->yylrState],
+ &yys->yysemantics.yysval]b4_location_if([, &yys->yyloc])[]b4_user_args[);
+ else
+ {
+#if YYDEBUG
+ if (yydebug)
+ {
+ YYFPRINTF (stderr, "%s unresolved ", yymsg);
+ yy_symbol_print (stderr, yystos[yys->yylrState],
+ NULL]b4_location_if([, &yys->yyloc])[]b4_user_args[);
+ YYFPRINTF (stderr, "\n");
+ }
+#endif
+
+ if (yys->yysemantics.yyfirstVal)
+ {
+ yySemanticOption *yyoption = yys->yysemantics.yyfirstVal;
+ yyGLRState *yyrh;
+ int yyn;
+ for (yyrh = yyoption->yystate, yyn = yyrhsLength (yyoption->yyrule);
+ yyn > 0;
+ yyrh = yyrh->yypred, yyn -= 1)
+ yydestroyGLRState (yymsg, yyrh]b4_user_args[);
+ }
+ }
+}
+
+/** Left-hand-side symbol for rule #RULE. */
static inline yySymbol
yylhsNonterm (yyRuleNum yyrule)
{
}
#define yyis_pact_ninf(yystate) \
- ]m4_if(m4_eval(b4_pact_ninf < b4_pact_min), 1,
- 0,
- ((yystate) == YYPACT_NINF))[
+ ]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). */
+ * of token). */
static inline yybool
yyisDefaultedState (yyStateNum yystate)
{
return yyis_pact_ninf (yypact[yystate]);
}
-/** The default reduction for STATE, assuming it has one. */
+/** The default reduction for STATE, assuming it has one. */
static inline yyRuleNum
yydefaultAction (yyStateNum yystate)
{
}
#define yyis_table_ninf(yytable_value) \
- ]m4_if(m4_eval(b4_table_ninf < b4_table_min), 1,
- 0,
- ((yytable_value) == YYTABLE_NINF))[
+ ]m4_if(m4_eval(b4_table_ninf < b4_table_min), [1],
+ [YYID (0)],
+ [((yytable_value) == YYTABLE_NINF)])[
/** Set *YYACTION to the action to take in YYSTATE on seeing YYTOKEN.
* Result R means
*/
static inline void
yygetLRActions (yyStateNum yystate, int yytoken,
- int* yyaction, const short int** yyconflicts)
+ int* yyaction, const short int** yyconflicts)
{
int yyindex = yypact[yystate] + yytoken;
if (yyindex < 0 || YYLAST < yyindex || yycheck[yyindex] != yytoken)
/* GLRStates */
+/** Return a fresh GLRStackItem. Callers should call
+ * YY_RESERVE_GLRSTACK afterwards to make sure there is sufficient
+ * headroom. */
+
+static inline yyGLRStackItem*
+yynewGLRStackItem (yyGLRStack* yystackp, yybool yyisState)
+{
+ yyGLRStackItem* yynewItem = yystackp->yynextFree;
+ yystackp->yyspaceLeft -= 1;
+ yystackp->yynextFree += 1;
+ yynewItem->yystate.yyisState = yyisState;
+ return yynewItem;
+}
+
+/** Add a new semantic action that will execute the action for rule
+ * RULENUM on the semantic values in RHS to the list of
+ * alternative actions for STATE. Assumes that RHS comes from
+ * stack #K of *STACKP. */
static void
-yyaddDeferredAction (yyGLRStack* yystack, yyGLRState* yystate,
- yyGLRState* rhs, yyRuleNum yyrule]b4_pure_formals[)
-{
- yySemanticOption* yynewItem;
- yynewItem = &yystack->yynextFree->yyoption;
- yystack->yyspaceLeft -= 1;
- yystack->yynextFree += 1;
- yynewItem->yyisState = yyfalse;
- yynewItem->yystate = rhs;
- yynewItem->yyrule = yyrule;
- yynewItem->yynext = yystate->yysemantics.yyfirstVal;
- yystate->yysemantics.yyfirstVal = yynewItem;
- if (yystack->yyspaceLeft < YYHEADROOM)
- yyexpandGLRStack (yystack]b4_pure_args[);
+yyaddDeferredAction (yyGLRStack* yystackp, size_t yyk, yyGLRState* yystate,
+ yyGLRState* rhs, yyRuleNum yyrule)
+{
+ yySemanticOption* yynewOption =
+ &yynewGLRStackItem (yystackp, yyfalse)->yyoption;
+ yynewOption->yystate = rhs;
+ yynewOption->yyrule = yyrule;
+ if (yystackp->yytops.yylookaheadNeeds[yyk])
+ {
+ yynewOption->yyrawchar = yychar;
+ yynewOption->yyval = yylval;
+ yynewOption->yyloc = yylloc;
+ }
+ else
+ yynewOption->yyrawchar = YYEMPTY;
+ yynewOption->yynext = yystate->yysemantics.yyfirstVal;
+ yystate->yysemantics.yyfirstVal = yynewOption;
+
+ YY_RESERVE_GLRSTACK (yystackp);
}
/* GLRStacks */
-/** Initialize SET to a singleton set containing an empty stack. */
-static void
+/** Initialize SET to a singleton set containing an empty stack. */
+static yybool
yyinitStateSet (yyGLRStateSet* yyset)
{
yyset->yysize = 1;
yyset->yycapacity = 16;
yyset->yystates = (yyGLRState**) YYMALLOC (16 * sizeof yyset->yystates[0]);
+ if (! yyset->yystates)
+ return yyfalse;
yyset->yystates[0] = NULL;
+ yyset->yylookaheadNeeds =
+ (yybool*) YYMALLOC (16 * sizeof yyset->yylookaheadNeeds[0]);
+ if (! yyset->yylookaheadNeeds)
+ {
+ YYFREE (yyset->yystates);
+ return yyfalse;
+ }
+ return yytrue;
}
static void yyfreeStateSet (yyGLRStateSet* yyset)
{
YYFREE (yyset->yystates);
+ YYFREE (yyset->yylookaheadNeeds);
}
/** Initialize STACK to a single empty stack, with total maximum
- * capacity for all stacks of SIZE. */
-static void
-yyinitGLRStack (yyGLRStack* yystack, size_t yysize)
+ * capacity for all stacks of SIZE. */
+static yybool
+yyinitGLRStack (yyGLRStack* yystackp, size_t yysize)
{
- yystack->yyerrflag = 0;
- yystack->yyerrState = 0;
+ yystackp->yyerrState = 0;
yynerrs = 0;
- yystack->yyspaceLeft = yysize;
- yystack->yynextFree = yystack->yyitems =
- (yyGLRStackItem*) YYMALLOC (yysize * sizeof yystack->yynextFree[0]);
- yystack->yysplitPoint = NULL;
- yystack->yylastDeleted = NULL;
- yyinitStateSet (&yystack->yytops);
+ yystackp->yyspaceLeft = yysize;
+ yystackp->yyitems =
+ (yyGLRStackItem*) YYMALLOC (yysize * sizeof yystackp->yynextFree[0]);
+ if (!yystackp->yyitems)
+ return yyfalse;
+ yystackp->yynextFree = yystackp->yyitems;
+ yystackp->yysplitPoint = NULL;
+ yystackp->yylastDeleted = NULL;
+ return yyinitStateSet (&yystackp->yytops);
}
-#define YYRELOC(YYFROMITEMS,YYTOITEMS,YYX,YYTYPE) \
+
+#if YYSTACKEXPANDABLE
+# define YYRELOC(YYFROMITEMS,YYTOITEMS,YYX,YYTYPE) \
&((YYTOITEMS) - ((YYFROMITEMS) - (yyGLRStackItem*) (YYX)))->YYTYPE
/** If STACK is expandable, extend it. WARNING: Pointers into the
stack from outside should be considered invalid after this call.
We always expand when there are 1 or fewer items left AFTER an
allocation, so that we can avoid having external pointers exist
- across an allocation. */
+ across an allocation. */
static void
-yyexpandGLRStack (yyGLRStack* yystack]b4_pure_formals[)
+yyexpandGLRStack (yyGLRStack* yystackp)
{
-#if YYSTACKEXPANDABLE
- yyGLRStack yynewStack;
+ yyGLRStackItem* yynewItems;
yyGLRStackItem* yyp0, *yyp1;
size_t yysize, yynewSize;
size_t yyn;
- yysize = yystack->yynextFree - yystack->yyitems;
+ yysize = yystackp->yynextFree - yystackp->yyitems;
if (YYMAXDEPTH <= yysize)
- yyFail (yystack][]b4_pure_args[, "parser stack overflow");
+ yyMemoryExhausted (yystackp);
yynewSize = 2*yysize;
if (YYMAXDEPTH < yynewSize)
yynewSize = YYMAXDEPTH;
- yyinitGLRStack (&yynewStack, yynewSize);
- for (yyp0 = yystack->yyitems, yyp1 = yynewStack.yyitems, yyn = yysize;
+ yynewItems = (yyGLRStackItem*) YYMALLOC (yynewSize * sizeof yynewItems[0]);
+ if (! yynewItems)
+ yyMemoryExhausted (yystackp);
+ for (yyp0 = yystackp->yyitems, yyp1 = yynewItems, yyn = yysize;
0 < yyn;
yyn -= 1, yyp0 += 1, yyp1 += 1)
{
yyv1->yynext = YYRELOC (yyp0, yyp1, yyv0->yynext, yyoption);
}
}
- if (yystack->yysplitPoint != NULL)
- yystack->yysplitPoint = YYRELOC (yystack->yyitems, yynewStack.yyitems,
- yystack->yysplitPoint, yystate);
-
- 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], yystate);
- YYFREE (yystack->yyitems);
- yystack->yyitems = yynewStack.yyitems;
- yystack->yynextFree = yynewStack.yynextFree + yysize;
- yystack->yyspaceLeft = yynewStack.yyspaceLeft - yysize;
-
-#else
-
- yyFail (yystack][]b4_pure_args[, "parser stack overflow");
-#endif
+ if (yystackp->yysplitPoint != NULL)
+ yystackp->yysplitPoint = YYRELOC (yystackp->yyitems, yynewItems,
+ yystackp->yysplitPoint, yystate);
+
+ for (yyn = 0; yyn < yystackp->yytops.yysize; yyn += 1)
+ if (yystackp->yytops.yystates[yyn] != NULL)
+ yystackp->yytops.yystates[yyn] =
+ YYRELOC (yystackp->yyitems, yynewItems,
+ yystackp->yytops.yystates[yyn], yystate);
+ YYFREE (yystackp->yyitems);
+ yystackp->yyitems = yynewItems;
+ yystackp->yynextFree = yynewItems + yysize;
+ yystackp->yyspaceLeft = yynewSize - yysize;
}
+#endif
static void
-yyfreeGLRStack (yyGLRStack* yystack)
+yyfreeGLRStack (yyGLRStack* yystackp)
{
- YYFREE (yystack->yyitems);
- yyfreeStateSet (&yystack->yytops);
+ YYFREE (yystackp->yyitems);
+ yyfreeStateSet (&yystackp->yytops);
}
/** Assuming that S is a GLRState somewhere on STACK, update the
* splitpoint of STACK, if needed, so that it is at least as deep as
- * S. */
+ * S. */
static inline void
-yyupdateSplit (yyGLRStack* yystack, yyGLRState* yys)
+yyupdateSplit (yyGLRStack* yystackp, yyGLRState* yys)
{
- if (yystack->yysplitPoint != NULL && yystack->yysplitPoint > yys)
- yystack->yysplitPoint = yys;
+ if (yystackp->yysplitPoint != NULL && yystackp->yysplitPoint > yys)
+ yystackp->yysplitPoint = yys;
}
-/** Invalidate stack #K in STACK. */
+/** Invalidate stack #K in STACK. */
static inline void
-yymarkStackDeleted (yyGLRStack* yystack, int yyk)
+yymarkStackDeleted (yyGLRStack* yystackp, size_t yyk)
{
- if (yystack->yytops.yystates[yyk] != NULL)
- yystack->yylastDeleted = yystack->yytops.yystates[yyk];
- yystack->yytops.yystates[yyk] = NULL;
+ if (yystackp->yytops.yystates[yyk] != NULL)
+ yystackp->yylastDeleted = yystackp->yytops.yystates[yyk];
+ yystackp->yytops.yystates[yyk] = NULL;
}
/** Undelete the last stack that was marked as deleted. Can only be
done once after a deletion, and only when all other stacks have
- been deleted. */
+ been deleted. */
static void
-yyundeleteLastStack (yyGLRStack* yystack)
+yyundeleteLastStack (yyGLRStack* yystackp)
{
- if (yystack->yylastDeleted == NULL || yystack->yytops.yysize != 0)
+ if (yystackp->yylastDeleted == NULL || yystackp->yytops.yysize != 0)
return;
- yystack->yytops.yystates[0] = yystack->yylastDeleted;
- yystack->yytops.yysize = 1;
+ yystackp->yytops.yystates[0] = yystackp->yylastDeleted;
+ yystackp->yytops.yysize = 1;
YYDPRINTF ((stderr, "Restoring last deleted stack as stack #0.\n"));
- yystack->yylastDeleted = NULL;
+ yystackp->yylastDeleted = NULL;
}
static inline void
-yyremoveDeletes (yyGLRStack* yystack)
+yyremoveDeletes (yyGLRStack* yystackp)
{
size_t yyi, yyj;
yyi = yyj = 0;
- while (yyj < yystack->yytops.yysize)
+ while (yyj < yystackp->yytops.yysize)
{
- if (yystack->yytops.yystates[yyi] == NULL)
+ if (yystackp->yytops.yystates[yyi] == NULL)
{
if (yyi == yyj)
{
YYDPRINTF ((stderr, "Removing dead stacks.\n"));
}
- yystack->yytops.yysize -= 1;
+ yystackp->yytops.yysize -= 1;
}
else
{
- yystack->yytops.yystates[yyj] = yystack->yytops.yystates[yyi];
+ yystackp->yytops.yystates[yyj] = yystackp->yytops.yystates[yyi];
+ /* In the current implementation, it's unnecessary to copy
+ yystackp->yytops.yylookaheadNeeds[yyi] since, after
+ yyremoveDeletes returns, the parser immediately either enters
+ deterministic operation or shifts a token. However, it doesn't
+ hurt, and the code might evolve to need it. */
+ yystackp->yytops.yylookaheadNeeds[yyj] =
+ yystackp->yytops.yylookaheadNeeds[yyi];
if (yyj != yyi)
{
YYDPRINTF ((stderr, "Rename stack %lu -> %lu.\n",
}
/** Shift to a new state on stack #K of STACK, corresponding to LR state
- * LRSTATE, at input position POSN, with (resolved) semantic value SVAL. */
+ * LRSTATE, at input position POSN, with (resolved) semantic value SVAL. */
static inline void
-yyglrShift (yyGLRStack* yystack, int yyk, yyStateNum yylrState, size_t yyposn,
- YYSTYPE yysval, YYLTYPE* yylocp]b4_user_formals[)
-{
- yyGLRStackItem* yynewItem;
-
- yynewItem = yystack->yynextFree;
- yystack->yynextFree += 1;
- yystack->yyspaceLeft -= 1;
- yynewItem->yystate.yyisState = yytrue;
- yynewItem->yystate.yylrState = yylrState;
- yynewItem->yystate.yyposn = yyposn;
- yynewItem->yystate.yyresolved = yytrue;
- yynewItem->yystate.yypred = yystack->yytops.yystates[yyk];
- yystack->yytops.yystates[yyk] = &yynewItem->yystate;
- yynewItem->yystate.yysemantics.yysval = yysval;
- yynewItem->yystate.yyloc = *yylocp;
- if (yystack->yyspaceLeft < YYHEADROOM)
- yyexpandGLRStack (yystack]b4_pure_args[);
+yyglrShift (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState,
+ size_t yyposn,
+ YYSTYPE* yyvalp, YYLTYPE* yylocp)
+{
+ yyGLRState* yynewState = &yynewGLRStackItem (yystackp, yytrue)->yystate;
+
+ yynewState->yylrState = yylrState;
+ yynewState->yyposn = yyposn;
+ yynewState->yyresolved = yytrue;
+ yynewState->yypred = yystackp->yytops.yystates[yyk];
+ yynewState->yysemantics.yysval = *yyvalp;
+ yynewState->yyloc = *yylocp;
+ yystackp->yytops.yystates[yyk] = yynewState;
+
+ YY_RESERVE_GLRSTACK (yystackp);
}
/** Shift stack #K of YYSTACK, to a new state corresponding to LR
* state YYLRSTATE, at input position YYPOSN, with the (unresolved)
- * semantic value of YYRHS under the action for YYRULE. */
+ * semantic value of YYRHS under the action for YYRULE. */
static inline void
-yyglrShiftDefer (yyGLRStack* yystack, int yyk, yyStateNum yylrState,
- size_t yyposn, yyGLRState* rhs, yyRuleNum yyrule]b4_pure_formals[)
-{
- yyGLRStackItem* yynewItem;
-
- yynewItem = yystack->yynextFree;
- yynewItem->yystate.yyisState = yytrue;
- yynewItem->yystate.yylrState = yylrState;
- yynewItem->yystate.yyposn = yyposn;
- yynewItem->yystate.yyresolved = yyfalse;
- yynewItem->yystate.yypred = yystack->yytops.yystates[yyk];
- yynewItem->yystate.yysemantics.yyfirstVal = NULL;
- yystack->yytops.yystates[yyk] = &yynewItem->yystate;
- yystack->yynextFree += 1;
- yystack->yyspaceLeft -= 1;
- yyaddDeferredAction (yystack, &yynewItem->yystate, rhs, yyrule]b4_pure_args[);
+yyglrShiftDefer (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState,
+ size_t yyposn, yyGLRState* rhs, yyRuleNum yyrule)
+{
+ yyGLRState* yynewState = &yynewGLRStackItem (yystackp, yytrue)->yystate;
+
+ yynewState->yylrState = yylrState;
+ yynewState->yyposn = yyposn;
+ yynewState->yyresolved = yyfalse;
+ yynewState->yypred = yystackp->yytops.yystates[yyk];
+ yynewState->yysemantics.yyfirstVal = NULL;
+ yystackp->yytops.yystates[yyk] = yynewState;
+
+ /* Invokes YY_RESERVE_GLRSTACK. */
+ yyaddDeferredAction (yystackp, yyk, yynewState, rhs, yyrule);
}
/** Pop the symbols consumed by reduction #RULE from the top of stack
* #K of STACK, and perform the appropriate semantic action on their
* semantic values. Assumes that all ambiguities in semantic values
- * have been previously resolved. Set *VALP to the resulting value,
+ * have been previously resolved. Set *VALP to the resulting value,
* and *LOCP to the computed location (if any). Return value is as
- * for userAction. */
+ * for userAction. */
static inline YYRESULTTAG
-yydoAction (yyGLRStack* yystack, int yyk, yyRuleNum yyrule,
+yydoAction (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[)
{
int yynrhs = yyrhsLength (yyrule);
- if (yystack->yysplitPoint == NULL)
+ if (yystackp->yysplitPoint == NULL)
{
- /* Standard special case: single stack. */
- yyGLRStackItem* rhs = (yyGLRStackItem*) yystack->yytops.yystates[yyk];
+ /* Standard special case: single stack. */
+ yyGLRStackItem* rhs = (yyGLRStackItem*) yystackp->yytops.yystates[yyk];
YYASSERT (yyk == 0);
- yystack->yynextFree -= yynrhs;
- yystack->yyspaceLeft += yynrhs;
- yystack->yytops.yystates[0] = & yystack->yynextFree[-1].yystate;
+ yystackp->yynextFree -= yynrhs;
+ yystackp->yyspaceLeft += yynrhs;
+ yystackp->yytops.yystates[0] = & yystackp->yynextFree[-1].yystate;
return yyuserAction (yyrule, yynrhs, rhs,
- yyvalp, yylocp, yystack]b4_user_args[);
+ yyvalp, yylocp, yystackp]b4_user_args[);
}
else
{
+ /* At present, doAction is never called in nondeterministic
+ * mode, so this branch is never taken. It is here in
+ * anticipation of a future feature that will allow immediate
+ * evaluation of selected actions in nondeterministic mode. */
int yyi;
yyGLRState* yys;
yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1];
yys = yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred
- = yystack->yytops.yystates[yyk];
+ = yystackp->yytops.yystates[yyk];]b4_location_if([[
+ if (yynrhs == 0)
+ /* Set default location. */
+ yyrhsVals[YYMAXRHS + YYMAXLEFT - 1].yystate.yyloc = yys->yyloc;]])[
for (yyi = 0; yyi < yynrhs; yyi += 1)
{
yys = yys->yypred;
YYASSERT (yys);
}
- yyupdateSplit (yystack, yys);
- yystack->yytops.yystates[yyk] = yys;
+ yyupdateSplit (yystackp, yys);
+ yystackp->yytops.yystates[yyk] = yys;
return yyuserAction (yyrule, yynrhs, yyrhsVals + YYMAXRHS + YYMAXLEFT - 1,
- yyvalp, yylocp, yystack]b4_user_args[);
+ yyvalp, yylocp, yystackp]b4_user_args[);
}
}
#if !YYDEBUG
-# define YY_REDUCE_PRINT(K, Rule)
+# define YY_REDUCE_PRINT(Args)
#else
-# define YY_REDUCE_PRINT(K, Rule) \
+# define YY_REDUCE_PRINT(Args) \
do { \
if (yydebug) \
- yy_reduce_print (K, Rule); \
-} while (0)
+ yy_reduce_print Args; \
+} while (YYID (0))
/*----------------------------------------------------------.
| Report that the RULE is going to be reduced on stack #K. |
`----------------------------------------------------------*/
-static inline void
-yy_reduce_print (size_t yyk, yyRuleNum yyrule)
+/*ARGSUSED*/ static inline void
+yy_reduce_print (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
+ YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[)
{
+ int yynrhs = yyrhsLength (yyrule);
+ yybool yynormal __attribute__ ((__unused__)) =
+ (yystackp->yysplitPoint == NULL);
+ yyGLRStackItem* yyvsp = (yyGLRStackItem*) yystackp->yytops.yystates[yyk];
+ int yylow = 1;
int yyi;
- YYFPRINTF (stderr, "Reducing stack %lu by rule %d (line %lu), ",
+ YYUSE (yyvalp);
+ YYUSE (yylocp);
+]b4_parse_param_use[]dnl
+[ YYFPRINTF (stderr, "Reducing stack %lu by rule %d (line %lu):\n",
(unsigned long int) yyk, yyrule - 1,
(unsigned long int) yyrline[yyrule]);
- /* 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]));
+ /* The symbols being reduced. */
+ for (yyi = 0; yyi < yynrhs; yyi++)
+ {
+ fprintf (stderr, " $%d = ", yyi + 1);
+ yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi],
+ &]b4_rhs_value(yynrhs, yyi + 1)[
+ ]b4_location_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
+ b4_user_args[);
+ fprintf (stderr, "\n");
+ }
}
#endif
* the new state. If the new state would have an identical input
* position, LR state, and predecessor to an existing state on the stack,
* it is identified with that existing state, eliminating stack #K from
- * the STACK. In this case, the (necessarily deferred) semantic value is
+ * the STACK. In this case, the (necessarily deferred) semantic value is
* added to the options for the existing state's semantic value.
*/
static inline YYRESULTTAG
-yyglrReduce (yyGLRStack* yystack, size_t yyk, yyRuleNum yyrule,
- yybool yyforceEval]b4_pure_formals[)
+yyglrReduce (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
+ yybool yyforceEval]b4_user_formals[)
{
- size_t yyposn = yystack->yytops.yystates[yyk]->yyposn;
+ size_t yyposn = yystackp->yytops.yystates[yyk]->yyposn;
- if (yyforceEval || yystack->yysplitPoint == NULL)
+ if (yyforceEval || yystackp->yysplitPoint == NULL)
{
YYSTYPE yysval;
YYLTYPE 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,
+ YY_REDUCE_PRINT ((yystackp, yyk, yyrule, &yysval, &yyloc]b4_user_args[));
+ YYCHK (yydoAction (yystackp, yyk, yyrule, &yysval,
+ &yyloc]b4_user_args[));
+ YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyrule], &yysval, &yyloc);
+ yyglrShift (yystackp, yyk,
+ yyLRgotoState (yystackp->yytops.yystates[yyk]->yylrState,
yylhsNonterm (yyrule)),
- yyposn, yysval, &yyloc]b4_user_args[);
+ yyposn, &yysval, &yyloc);
}
else
{
size_t yyi;
int yyn;
- yyGLRState* yys, *yys0 = yystack->yytops.yystates[yyk];
+ yyGLRState* yys, *yys0 = yystackp->yytops.yystates[yyk];
yyStateNum yynewLRState;
- for (yys = yystack->yytops.yystates[yyk], yyn = yyrhsLength (yyrule);
+ for (yys = yystackp->yytops.yystates[yyk], yyn = yyrhsLength (yyrule);
0 < yyn; yyn -= 1)
{
yys = yys->yypred;
YYASSERT (yys);
}
- yyupdateSplit (yystack, yys);
+ yyupdateSplit (yystackp, yys);
yynewLRState = yyLRgotoState (yys->yylrState, yylhsNonterm (yyrule));
YYDPRINTF ((stderr,
- "Reduced stack %lu by rule #%d; action deferred. Now in state %d.\n",
+ "Reduced stack %lu by rule #%d; action deferred. Now in state %d.\n",
(unsigned long int) yyk, yyrule - 1, yynewLRState));
- for (yyi = 0; yyi < yystack->yytops.yysize; yyi += 1)
- if (yyi != yyk && yystack->yytops.yystates[yyi] != NULL)
+ for (yyi = 0; yyi < yystackp->yytops.yysize; yyi += 1)
+ if (yyi != yyk && yystackp->yytops.yystates[yyi] != NULL)
{
- yyGLRState* yyp, *yysplit = yystack->yysplitPoint;
- yyp = yystack->yytops.yystates[yyi];
+ yyGLRState* yyp, *yysplit = yystackp->yysplitPoint;
+ yyp = yystackp->yytops.yystates[yyi];
while (yyp != yys && yyp != yysplit && yyp->yyposn >= yyposn)
{
if (yyp->yylrState == yynewLRState && yyp->yypred == yys)
{
- yyaddDeferredAction (yystack, yyp, yys0, yyrule]b4_pure_args[);
- yymarkStackDeleted (yystack, yyk);
+ yyaddDeferredAction (yystackp, yyk, yyp, yys0, yyrule);
+ yymarkStackDeleted (yystackp, yyk);
YYDPRINTF ((stderr, "Merging stack %lu into stack %lu.\n",
(unsigned long int) yyk,
(unsigned long int) yyi));
yyp = yyp->yypred;
}
}
- yystack->yytops.yystates[yyk] = yys;
- yyglrShiftDefer (yystack, yyk, yynewLRState, yyposn, yys0, yyrule]b4_pure_args[);
+ yystackp->yytops.yystates[yyk] = yys;
+ yyglrShiftDefer (yystackp, yyk, yynewLRState, yyposn, yys0, yyrule);
}
return yyok;
}
-static int
-yysplitStack (yyGLRStack* yystack, int yyk)
+static size_t
+yysplitStack (yyGLRStack* yystackp, size_t yyk)
{
- if (yystack->yysplitPoint == NULL)
+ if (yystackp->yysplitPoint == NULL)
{
YYASSERT (yyk == 0);
- yystack->yysplitPoint = yystack->yytops.yystates[yyk];
+ yystackp->yysplitPoint = yystackp->yytops.yystates[yyk];
}
- if (yystack->yytops.yysize >= yystack->yytops.yycapacity)
+ if (yystackp->yytops.yysize >= yystackp->yytops.yycapacity)
{
- yystack->yytops.yycapacity *= 2;
- yystack->yytops.yystates =
- (yyGLRState**) YYREALLOC (yystack->yytops.yystates,
- (yystack->yytops.yycapacity
- * sizeof yystack->yytops.yystates[0]));
+ yyGLRState** yynewStates;
+ yybool* yynewLookaheadNeeds;
+
+ yynewStates = NULL;
+
+ if (yystackp->yytops.yycapacity
+ > (YYSIZEMAX / (2 * sizeof yynewStates[0])))
+ yyMemoryExhausted (yystackp);
+ yystackp->yytops.yycapacity *= 2;
+
+ yynewStates =
+ (yyGLRState**) YYREALLOC (yystackp->yytops.yystates,
+ (yystackp->yytops.yycapacity
+ * sizeof yynewStates[0]));
+ if (yynewStates == NULL)
+ yyMemoryExhausted (yystackp);
+ yystackp->yytops.yystates = yynewStates;
+
+ yynewLookaheadNeeds =
+ (yybool*) YYREALLOC (yystackp->yytops.yylookaheadNeeds,
+ (yystackp->yytops.yycapacity
+ * sizeof yynewLookaheadNeeds[0]));
+ if (yynewLookaheadNeeds == NULL)
+ yyMemoryExhausted (yystackp);
+ yystackp->yytops.yylookaheadNeeds = yynewLookaheadNeeds;
}
- yystack->yytops.yystates[yystack->yytops.yysize]
- = yystack->yytops.yystates[yyk];
- yystack->yytops.yysize += 1;
- return yystack->yytops.yysize-1;
+ yystackp->yytops.yystates[yystackp->yytops.yysize]
+ = yystackp->yytops.yystates[yyk];
+ yystackp->yytops.yylookaheadNeeds[yystackp->yytops.yysize]
+ = yystackp->yytops.yylookaheadNeeds[yyk];
+ yystackp->yytops.yysize += 1;
+ return yystackp->yytops.yysize-1;
}
/** True iff Y0 and Y1 represent identical options at the top level.
* That is, they represent the same rule applied to RHS symbols
- * that produce the same terminal symbols. */
+ * that produce the same terminal symbols. */
static yybool
yyidenticalOptions (yySemanticOption* yyy0, yySemanticOption* yyy1)
{
return yyfalse;
}
-/** Assuming identicalOptions (Y0,Y1), (destructively) merge the
- * alternative semantic values for the RHS-symbols of Y1 into the
- * corresponding semantic value sets of the symbols of Y0. */
+/** Assuming identicalOptions (Y0,Y1), destructively merge the
+ * alternative semantic values for the RHS-symbols of Y1 and Y0. */
static void
yymergeOptionSets (yySemanticOption* yyy0, yySemanticOption* yyy1)
{
yyn = yyrhsLength (yyy0->yyrule);
yyn > 0;
yys0 = yys0->yypred, yys1 = yys1->yypred, yyn -= 1)
- if (yys0 == yys1)
- break;
- else if (! yys0->yyresolved && ! yys1->yyresolved)
- {
- yySemanticOption* yyz;
- for (yyz = yys0->yysemantics.yyfirstVal; yyz->yynext != NULL;
- yyz = yyz->yynext)
- continue;
- yyz->yynext = yys1->yysemantics.yyfirstVal;
- }
+ {
+ if (yys0 == yys1)
+ break;
+ else if (yys0->yyresolved)
+ {
+ yys1->yyresolved = yytrue;
+ yys1->yysemantics.yysval = yys0->yysemantics.yysval;
+ }
+ else if (yys1->yyresolved)
+ {
+ yys0->yyresolved = yytrue;
+ yys0->yysemantics.yysval = yys1->yysemantics.yysval;
+ }
+ else
+ {
+ yySemanticOption** yyz0p;
+ yySemanticOption* yyz1;
+ yyz0p = &yys0->yysemantics.yyfirstVal;
+ yyz1 = yys1->yysemantics.yyfirstVal;
+ while (YYID (yytrue))
+ {
+ if (yyz1 == *yyz0p || yyz1 == NULL)
+ break;
+ else if (*yyz0p == NULL)
+ {
+ *yyz0p = yyz1;
+ break;
+ }
+ else if (*yyz0p < yyz1)
+ {
+ yySemanticOption* yyz = *yyz0p;
+ *yyz0p = yyz1;
+ yyz1 = yyz1->yynext;
+ (*yyz0p)->yynext = yyz;
+ }
+ yyz0p = &(*yyz0p)->yynext;
+ }
+ yys1->yysemantics.yyfirstVal = yys0->yysemantics.yyfirstVal;
+ }
+ }
}
/** Y0 and Y1 represent two possible actions to take in a given
* parsing state; return 0 if no combination is possible,
- * 1 if user-mergeable, 2 if Y0 is preferred, 3 if Y1 is preferred. */
+ * 1 if user-mergeable, 2 if Y0 is preferred, 3 if Y1 is preferred. */
static int
yypreference (yySemanticOption* y0, yySemanticOption* y1)
{
return 0;
}
-static YYRESULTTAG yyresolveValue (yySemanticOption* yyoptionList,
- yyGLRStack* yystack, YYSTYPE* yyvalp,
+static YYRESULTTAG yyresolveValue (yyGLRState* yys,
+ yyGLRStack* yystackp, YYSTYPE* yyvalp,
YYLTYPE* yylocp]b4_user_formals[);
static YYRESULTTAG
-yyresolveStates (yyGLRState* yys, int yyn, yyGLRStack* yystack]b4_user_formals[)
+yyresolveStates (yyGLRState* yys, int yyn,
+ yyGLRStack* yystackp]b4_user_formals[)
{
- YYRESULTTAG yyflag;
if (0 < yyn)
{
YYASSERT (yys->yypred);
- yyflag = yyresolveStates (yys->yypred, yyn-1, yystack]b4_user_args[);
- if (yyflag != yyok)
- return yyflag;
+ YYCHK (yyresolveStates (yys->yypred, yyn-1, yystackp]b4_user_args[));
if (! yys->yyresolved)
{
- yyflag = yyresolveValue (yys->yysemantics.yyfirstVal, yystack,
- &yys->yysemantics.yysval, &yys->yyloc
- ]b4_user_args[);
+ YYSTYPE yysval;
+ YYRESULTTAG yyflag = yyresolveValue (yys, yystackp, &yysval,
+ &yys->yyloc]b4_user_args[);
if (yyflag != yyok)
- return yyflag;
+ {
+ yys->yysemantics.yyfirstVal = NULL;
+ return yyflag;
+ }
+ yys->yysemantics.yysval = yysval;
yys->yyresolved = yytrue;
}
}
}
static YYRESULTTAG
-yyresolveAction (yySemanticOption* yyopt, yyGLRStack* yystack,
- YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[)
+yyresolveAction (yySemanticOption* yyopt, yyGLRStack* yystackp,
+ YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[)
{
yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1];
int yynrhs;
+ int yychar_current;
+ YYSTYPE yylval_current;
+ YYLTYPE yylloc_current;
+ YYRESULTTAG yyresult;
yynrhs = yyrhsLength (yyopt->yyrule);
- YYCHK (yyresolveStates (yyopt->yystate, yynrhs, 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[);
+ YYCHK (yyresolveStates (yyopt->yystate, yynrhs, yystackp]b4_user_args[));
+ yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred = yyopt->yystate;]b4_location_if([[
+ if (yynrhs == 0)
+ /* Set default location. */
+ yyrhsVals[YYMAXRHS + YYMAXLEFT - 1].yystate.yyloc = yyopt->yystate->yyloc;]])[
+ yychar_current = yychar;
+ yylval_current = yylval;
+ yylloc_current = yylloc;
+ yychar = yyopt->yyrawchar;
+ yylval = yyopt->yyval;
+ yylloc = yyopt->yyloc;
+ yyresult = yyuserAction (yyopt->yyrule, yynrhs,
+ yyrhsVals + YYMAXRHS + YYMAXLEFT - 1,
+ yyvalp, yylocp, yystackp]b4_user_args[);
+ yychar = yychar_current;
+ yylval = yylval_current;
+ yylloc = yylloc_current;
+ return yyresult;
}
#if YYDEBUG
}
#endif
-static void
+static void yyreportAmbiguity (yySemanticOption* yyx0, yySemanticOption* yyx1,
+ yyGLRStack* yystackp]b4_pure_formals[)
+ __attribute__ ((__noreturn__));
+/*ARGSUSED*/ static void
yyreportAmbiguity (yySemanticOption* yyx0, yySemanticOption* yyx1,
- yyGLRStack* yystack]b4_pure_formals[)
+ yyGLRStack* yystackp]b4_pure_formals[)
{
- /* `Unused' warnings. */
- (void) yyx0;
- (void) yyx1;
+ YYUSE (yyx0);
+ YYUSE (yyx1);
#if YYDEBUG
YYFPRINTF (stderr, "Ambiguity detected.\n");
yyreportTree (yyx1, 2);
YYFPRINTF (stderr, "\n");
#endif
- yyFail (yystack][]b4_pure_args[, "ambiguity detected");
+ yyFail (yystackp][]b4_pure_args[, YY_("syntax is ambiguous"));
}
-/** Resolve the ambiguity represented by OPTIONLIST, perform the indicated
- * actions, and return the result. */
+/** Resolve the ambiguity represented in state S, perform the indicated
+ * actions, and return the result. */
static YYRESULTTAG
-yyresolveValue (yySemanticOption* yyoptionList, yyGLRStack* yystack,
- YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[)
+yyresolveValue (yyGLRState* yys, yyGLRStack* yystackp, YYSTYPE* yyvalp,
+ YYLTYPE* yylocp]b4_user_formals[)
{
+ yySemanticOption* yyoptionList = yys->yysemantics.yyfirstVal;
yySemanticOption* yybest;
- yySemanticOption* yyp;
- int yymerge;
+ yySemanticOption** yypp;
+ yybool yymerge;
yybest = yyoptionList;
- yymerge = 0;
- for (yyp = yyoptionList->yynext; yyp != NULL; yyp = yyp->yynext)
+ yymerge = yyfalse;
+ for (yypp = &yyoptionList->yynext; *yypp != NULL; )
{
+ yySemanticOption* yyp = *yypp;
+
if (yyidenticalOptions (yybest, yyp))
- yymergeOptionSets (yybest, yyp);
+ {
+ yymergeOptionSets (yybest, yyp);
+ *yypp = yyp->yynext;
+ }
else
- switch (yypreference (yybest, yyp))
- {
- case 0:
- yyreportAmbiguity (yybest, yyp, yystack]b4_pure_args[);
- break;
- case 1:
- yymerge = 1;
- break;
- case 2:
- break;
- case 3:
- yybest = yyp;
- yymerge = 0;
- break;
- }
+ {
+ switch (yypreference (yybest, yyp))
+ {
+ case 0:
+ yyreportAmbiguity (yybest, yyp, yystackp]b4_pure_args[);
+ break;
+ case 1:
+ yymerge = yytrue;
+ break;
+ case 2:
+ break;
+ case 3:
+ yybest = yyp;
+ yymerge = yyfalse;
+ break;
+ default:
+ /* This cannot happen so it is not worth a YYASSERT (yyfalse),
+ but some compilers complain if the default case is
+ omitted. */
+ break;
+ }
+ yypp = &yyp->yynext;
+ }
}
if (yymerge)
{
+ yySemanticOption* yyp;
int yyprec = yydprec[yybest->yyrule];
- YYCHK (yyresolveAction (yybest, yystack, yyvalp, yylocp]b4_user_args[));
+ YYCHK (yyresolveAction (yybest, yystackp, 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]b4_user_args[));
+ YYRESULTTAG yyflag = yyresolveAction (yyp, yystackp, &yyval1,
+ &yydummy]b4_user_args[);
+ if (yyflag != yyok)
+ {
+ yydestruct ("Cleanup: discarding merged value",
+ yystos[yys->yylrState],
+ yyvalp]b4_location_if([, yylocp])[]b4_user_args[);
+ return yyflag;
+ }
yyuserMerge (yymerger[yyp->yyrule], yyvalp, &yyval1);
}
}
return yyok;
}
else
- return yyresolveAction (yybest, yystack, yyvalp, yylocp]b4_user_args[);
+ return yyresolveAction (yybest, yystackp, yyvalp, yylocp]b4_user_args[);
}
static YYRESULTTAG
-yyresolveStack (yyGLRStack* yystack]b4_user_formals[)
+yyresolveStack (yyGLRStack* yystackp]b4_user_formals[)
{
- if (yystack->yysplitPoint != NULL)
+ if (yystackp->yysplitPoint != NULL)
{
yyGLRState* yys;
int yyn;
- for (yyn = 0, yys = yystack->yytops.yystates[0];
- yys != yystack->yysplitPoint;
+ for (yyn = 0, yys = yystackp->yytops.yystates[0];
+ yys != yystackp->yysplitPoint;
yys = yys->yypred, yyn += 1)
continue;
- YYCHK (yyresolveStates (yystack->yytops.yystates[0], yyn, yystack
+ YYCHK (yyresolveStates (yystackp->yytops.yystates[0], yyn, yystackp
]b4_user_args[));
}
return yyok;
}
static void
-yycompressStack (yyGLRStack* yystack)
+yycompressStack (yyGLRStack* yystackp)
{
yyGLRState* yyp, *yyq, *yyr;
- if (yystack->yytops.yysize != 1 || yystack->yysplitPoint == NULL)
+ if (yystackp->yytops.yysize != 1 || yystackp->yysplitPoint == NULL)
return;
- for (yyp = yystack->yytops.yystates[0], yyq = yyp->yypred, yyr = NULL;
- yyp != yystack->yysplitPoint;
+ for (yyp = yystackp->yytops.yystates[0], yyq = yyp->yypred, yyr = NULL;
+ yyp != yystackp->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;
+ yystackp->yyspaceLeft += yystackp->yynextFree - yystackp->yyitems;
+ yystackp->yynextFree = ((yyGLRStackItem*) yystackp->yysplitPoint) + 1;
+ yystackp->yyspaceLeft -= yystackp->yynextFree - yystackp->yyitems;
+ yystackp->yysplitPoint = NULL;
+ yystackp->yylastDeleted = NULL;
while (yyr != NULL)
{
- yystack->yynextFree->yystate = *yyr;
+ yystackp->yynextFree->yystate = *yyr;
yyr = yyr->yypred;
- yystack->yynextFree->yystate.yypred = & yystack->yynextFree[-1].yystate;
- yystack->yytops.yystates[0] = &yystack->yynextFree->yystate;
- yystack->yynextFree += 1;
- yystack->yyspaceLeft -= 1;
+ yystackp->yynextFree->yystate.yypred = &yystackp->yynextFree[-1].yystate;
+ yystackp->yytops.yystates[0] = &yystackp->yynextFree->yystate;
+ yystackp->yynextFree += 1;
+ yystackp->yyspaceLeft -= 1;
}
}
static YYRESULTTAG
-yyprocessOneStack (yyGLRStack* yystack, int yyk,
- size_t yyposn, YYSTYPE* yylvalp, YYLTYPE* yyllocp
- ]b4_user_formals[)
+yyprocessOneStack (yyGLRStack* yystackp, size_t yyk,
+ size_t yyposn]b4_pure_formals[)
{
int yyaction;
const short int* yyconflicts;
yyRuleNum yyrule;
- yySymbol* const yytokenp = yystack->yytokenp;
- while (yystack->yytops.yystates[yyk] != NULL)
+ while (yystackp->yytops.yystates[yyk] != NULL)
{
- yyStateNum yystate = yystack->yytops.yystates[yyk]->yylrState;
- YYDPRINTF ((stderr, "Stack %d Entering state %d\n", yyk, yystate));
+ yyStateNum yystate = yystackp->yytops.yystates[yyk]->yylrState;
+ YYDPRINTF ((stderr, "Stack %lu Entering state %d\n",
+ (unsigned long int) yyk, yystate));
YYASSERT (yystate != YYFINAL);
yyrule = yydefaultAction (yystate);
if (yyrule == 0)
{
- YYDPRINTF ((stderr, "Stack %d dies.\n", yyk));
- yymarkStackDeleted (yystack, yyk);
+ YYDPRINTF ((stderr, "Stack %lu dies.\n",
+ (unsigned long int) yyk));
+ yymarkStackDeleted (yystackp, yyk);
return yyok;
}
- YYCHK (yyglrReduce (yystack, yyk, yyrule, yyfalse]b4_lpure_args[));
+ YYCHK (yyglrReduce (yystackp, yyk, yyrule, yyfalse]b4_user_args[));
}
else
{
- if (*yytokenp == YYEMPTY)
+ yySymbol yytoken;
+ yystackp->yytops.yylookaheadNeeds[yyk] = yytrue;
+ if (yychar == YYEMPTY)
{
YYDPRINTF ((stderr, "Reading a token: "));
yychar = YYLEX;
- *yytokenp = YYTRANSLATE (yychar);
- YY_SYMBOL_PRINT ("Next token is", *yytokenp, yylvalp, yyllocp);
+ yytoken = YYTRANSLATE (yychar);
+ YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
}
- yygetLRActions (yystate, *yytokenp, &yyaction, &yyconflicts);
+ else
+ yytoken = YYTRANSLATE (yychar);
+ yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts);
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]b4_lpure_args[));
- YYCHK (yyprocessOneStack (yystack, yynewStack, yyposn,
- yylvalp, yyllocp]b4_user_args[));
+ size_t yynewStack = yysplitStack (yystackp, yyk);
+ YYDPRINTF ((stderr, "Splitting off stack %lu from %lu.\n",
+ (unsigned long int) yynewStack,
+ (unsigned long int) yyk));
+ YYCHK (yyglrReduce (yystackp, yynewStack,
+ *yyconflicts, yyfalse]b4_user_args[));
+ YYCHK (yyprocessOneStack (yystackp, yynewStack,
+ yyposn]b4_pure_args[));
yyconflicts += 1;
}
if (yyisShiftAction (yyaction))
- {
- YYDPRINTF ((stderr, "On stack %d, ", yyk));
- YY_SYMBOL_PRINT ("shifting", *yytokenp, yylvalp, yyllocp);
- yyglrShift (yystack, yyk, yyaction, yyposn+1,
- *yylvalp, yyllocp]b4_user_args[);
- YYDPRINTF ((stderr, ", now in state #%d\n",
- yystack->yytops.yystates[yyk]->yylrState));
- break;
- }
+ break;
else if (yyisErrorAction (yyaction))
{
- YYDPRINTF ((stderr, "Stack %d dies.\n", yyk));
- yymarkStackDeleted (yystack, yyk);
+ YYDPRINTF ((stderr, "Stack %lu dies.\n",
+ (unsigned long int) yyk));
+ yymarkStackDeleted (yystackp, yyk);
break;
}
else
- YYCHK (yyglrReduce (yystack, yyk, -yyaction, yyfalse]b4_lpure_args[));
+ YYCHK (yyglrReduce (yystackp, yyk, -yyaction,
+ yyfalse]b4_user_args[));
}
}
return yyok;
}
-static void
-yyreportSyntaxError (yyGLRStack* yystack,
- YYSTYPE* yylvalp, YYLTYPE* yyllocp]b4_user_formals[)
+/*ARGSUSED*/ static void
+yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
{
- /* `Unused' warnings. */
- (void) yylvalp;
- (void) yyllocp;
-
- if (yystack->yyerrState == 0)
+ if (yystackp->yyerrState == 0)
{
#if YYERROR_VERBOSE
- yySymbol* const yytokenp = yystack->yytokenp;
int yyn;
- yyn = yypact[yystack->yytops.yystates[0]->yylrState];
+ yyn = yypact[yystackp->yytops.yystates[0]->yylrState];
if (YYPACT_NINF < yyn && yyn < YYLAST)
{
- size_t yysize = 0;
- const char* yyprefix;
- char* yymsg;
+ yySymbol yytoken = YYTRANSLATE (yychar);
+ size_t yysize0 = yytnamerr (NULL, yytokenName (yytoken));
+ size_t yysize = yysize0;
+ size_t yysize1;
+ yybool yysize_overflow = yyfalse;
+ char* yymsg = NULL;
+ enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
+ char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
int yyx;
+ char *yyfmt;
+ char const *yyf;
+ static char const yyunexpected[] = "syntax error, unexpected %s";
+ static char const yyexpecting[] = ", expecting %s";
+ static char const yyor[] = " or %s";
+ char yyformat[sizeof yyunexpected
+ + sizeof yyexpecting - 1
+ + ((YYERROR_VERBOSE_ARGS_MAXIMUM - 2)
+ * (sizeof yyor - 1))];
+ char const *yyprefix = yyexpecting;
/* Start YYX at -YYN if negative to avoid negative indexes in
YYCHECK. */
/* Stay within bounds of both yycheck and yytname. */
int yychecklim = YYLAST - yyn;
int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
- int yycount = 0;
+ int yycount = 1;
+
+ yyarg[0] = yytokenName (yytoken);
+ yyfmt = yystpcpy (yyformat, yyunexpected);
- yyprefix = ", expecting ";
for (yyx = yyxbegin; yyx < yyxend; ++yyx)
if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
{
- yysize += strlen (yyprefix) + strlen (yytokenName (yyx));
- yycount += 1;
- if (yycount == 5)
+ if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
{
- yysize = 0;
+ yycount = 1;
+ yysize = yysize0;
+ yyformat[sizeof yyunexpected - 1] = '\0';
break;
}
- yyprefix = " or ";
+ yyarg[yycount++] = yytokenName (yyx);
+ yysize1 = yysize + yytnamerr (NULL, yytokenName (yyx));
+ yysize_overflow |= yysize1 < yysize;
+ yysize = yysize1;
+ yyfmt = yystpcpy (yyfmt, yyprefix);
+ yyprefix = yyor;
}
- yysize += (sizeof ("syntax error, unexpected ")
- + strlen (yytokenName (*yytokenp)));
- yymsg = (char*) YYMALLOC (yysize);
- if (yymsg != 0)
+
+ yyf = YY_(yyformat);
+ yysize1 = yysize + strlen (yyf);
+ yysize_overflow |= yysize1 < yysize;
+ yysize = yysize1;
+
+ if (!yysize_overflow)
+ yymsg = (char *) YYMALLOC (yysize);
+
+ if (yymsg)
{
- char* yyp = yymsg;
- sprintf (yyp, "syntax error%s%s",
- (*yytokenp == YYEMPTY ? "" : ", unexpected "),
- yytokenName (*yytokenp));
- yyp += strlen (yyp);
- if (yycount < 5)
+ char *yyp = yymsg;
+ int yyi = 0;
+ while ((*yyp = *yyf))
{
- 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 ";
- }
+ if (*yyp == '%' && yyf[1] == 's' && yyi < yycount)
+ {
+ yyp += yytnamerr (yyp, yyarg[yyi++]);
+ yyf += 2;
+ }
+ else
+ {
+ yyp++;
+ yyf++;
+ }
}
yyerror (]b4_lyyerror_args[yymsg);
YYFREE (yymsg);
}
else
- yyerror (]b4_lyyerror_args["syntax error; also virtual memory exhausted");
+ {
+ yyerror (]b4_lyyerror_args[YY_("syntax error"));
+ yyMemoryExhausted (yystackp);
+ }
}
else
#endif /* YYERROR_VERBOSE */
- yyerror (]b4_lyyerror_args["syntax error");
+ yyerror (]b4_lyyerror_args[YY_("syntax error"));
yynerrs += 1;
}
}
-/* Recover from a syntax error on YYSTACK, assuming that YYTOKENP,
- YYLVALP, and YYLLOCP point to the syntactic category, semantic
- value, and location of the look-ahead. */
-static void
-yyrecoverSyntaxError (yyGLRStack* yystack,
- YYSTYPE* yylvalp,
- YYLTYPE* yyllocp]b4_location_if(, [ ATTRIBUTE_UNUSED])[
- ]b4_user_formals[)
+/* Recover from a syntax error on *YYSTACKP, assuming that *YYSTACKP->YYTOKENP,
+ yylval, and yylloc are the syntactic category, semantic value, and location
+ of the look-ahead. */
+/*ARGSUSED*/ static void
+yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
{
- yySymbol* const yytokenp = yystack->yytokenp;
size_t yyk;
int yyj;
- if (yystack->yyerrState == 3)
+ if (yystackp->yyerrState == 3)
/* We just shifted the error token and (perhaps) took some
reductions. Skip tokens until we can proceed. */
- while (yytrue)
+ while (YYID (yytrue))
{
- if (*yytokenp == YYEOF)
- {
- /* Now pop stack until empty and fail. */
- while (yystack->yytops.yystates[0] != NULL)
- {
- yyGLRState *yys = yystack->yytops.yystates[0];
-]b4_location_if([[ yystack->yyerror_range[0].yystate.yyloc = yys->yyloc;]])[
- yydestruct ("Error: popping",
- 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)
+ yySymbol yytoken;
+ if (yychar == YYEOF)
+ yyFail (yystackp][]b4_lpure_args[, NULL);
+ if (yychar != YYEMPTY)
{]b4_location_if([[
/* We throw away the lookahead, but the error range
- of the shifted error token must take it into account. */
- yyGLRState *yys = yystack->yytops.yystates[0];
- yys->yyloc.last_line = yyllocp->last_line;
- yys->yyloc.last_column = yyllocp->last_column;]])[
+ of the shifted error token must take it into account. */
+ yyGLRState *yys = yystackp->yytops.yystates[0];
+ yyGLRStackItem yyerror_range[3];
+ yyerror_range[1].yystate.yyloc = yys->yyloc;
+ yyerror_range[2].yystate.yyloc = yylloc;
+ YYLLOC_DEFAULT ((yys->yyloc), yyerror_range, 2);]])[
+ yytoken = YYTRANSLATE (yychar);
yydestruct ("Error: discarding",
- *yytokenp, yylvalp]b4_location_if([, yyllocp])[);
+ yytoken, &yylval]b4_location_if([, &yylloc])[]b4_user_args[);
}
YYDPRINTF ((stderr, "Reading a token: "));
yychar = YYLEX;
- *yytokenp = YYTRANSLATE (yychar);
- YY_SYMBOL_PRINT ("Next token is", *yytokenp, yylvalp, yyllocp);
- yyj = yypact[yystack->yytops.yystates[0]->yylrState];
+ yytoken = YYTRANSLATE (yychar);
+ YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
+ yyj = yypact[yystackp->yytops.yystates[0]->yylrState];
if (yyis_pact_ninf (yyj))
return;
- yyj += *yytokenp;
- if (yyj < 0 || YYLAST < yyj || yycheck[yyj] != *yytokenp)
+ yyj += yytoken;
+ if (yyj < 0 || YYLAST < yyj || yycheck[yyj] != yytoken)
{
- if (yydefact[yystack->yytops.yystates[0]->yylrState] != 0)
+ if (yydefact[yystackp->yytops.yystates[0]->yylrState] != 0)
return;
}
else if (yytable[yyj] != 0 && ! yyis_table_ninf (yytable[yyj]))
}
/* Reduce to one stack. */
- for (yyk = 0; yyk < yystack->yytops.yysize; yyk += 1)
- if (yystack->yytops.yystates[yyk] != NULL)
+ for (yyk = 0; yyk < yystackp->yytops.yysize; yyk += 1)
+ if (yystackp->yytops.yystates[yyk] != NULL)
break;
- if (yyk >= yystack->yytops.yysize)
- 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)
+ if (yyk >= yystackp->yytops.yysize)
+ yyFail (yystackp][]b4_lpure_args[, NULL);
+ for (yyk += 1; yyk < yystackp->yytops.yysize; yyk += 1)
+ yymarkStackDeleted (yystackp, yyk);
+ yyremoveDeletes (yystackp);
+ yycompressStack (yystackp);
+
+ /* Now pop stack until we find a state that shifts the error token. */
+ yystackp->yyerrState = 3;
+ while (yystackp->yytops.yystates[0] != NULL)
{
- yyGLRState *yys = yystack->yytops.yystates[0];
+ yyGLRState *yys = yystackp->yytops.yystates[0];
yyj = yypact[yys->yylrState];
if (! yyis_pact_ninf (yyj))
{
{
/* Shift the error token having adjusted its location. */
YYLTYPE yyerrloc;]b4_location_if([[
- yystack->yyerror_range[1].yystate.yyloc = *yyllocp;
- YYLLOC_DEFAULT (yyerrloc, yystack->yyerror_range - 1, 2);]])[
+ yystackp->yyerror_range[2].yystate.yyloc = yylloc;
+ YYLLOC_DEFAULT (yyerrloc, (yystackp->yyerror_range), 2);]])[
YY_SYMBOL_PRINT ("Shifting", yystos[yytable[yyj]],
- yylvalp, &yyerrloc);
- yyglrShift (yystack, 0, yytable[yyj],
- yys->yyposn, *yylvalp, &yyerrloc]b4_user_args[);
- yys = yystack->yytops.yystates[0];
+ &yylval, &yyerrloc);
+ yyglrShift (yystackp, 0, yytable[yyj],
+ yys->yyposn, &yylval, &yyerrloc);
+ yys = yystackp->yytops.yystates[0];
break;
}
}
-]b4_location_if([[ yystack->yyerror_range[0].yystate.yyloc = yys->yyloc;]])[
- yydestruct ("Error: popping",
- yystos[yys->yylrState],
- &yys->yysemantics.yysval]b4_location_if([, &yys->yyloc])[);
- yystack->yytops.yystates[0] = yys->yypred;
- yystack->yynextFree -= 1;
- yystack->yyspaceLeft += 1;
+]b4_location_if([[ yystackp->yyerror_range[1].yystate.yyloc = yys->yyloc;]])[
+ yydestroyGLRState ("Error: popping", yys]b4_user_args[);
+ yystackp->yytops.yystates[0] = yys->yypred;
+ yystackp->yynextFree -= 1;
+ yystackp->yyspaceLeft += 1;
}
- if (yystack->yytops.yystates[0] == NULL)
- yyFail (yystack][]b4_lpure_args[, NULL);
+ if (yystackp->yytops.yystates[0] == NULL)
+ yyFail (yystackp][]b4_lpure_args[, NULL);
}
#define YYCHK1(YYE) \
do { \
switch (YYE) { \
- default: \
+ case yyok: \
break; \
case yyabort: \
- yystack.yyerrflag = 1; \
- goto yyDone; \
+ goto yyabortlab; \
case yyaccept: \
- yystack.yyerrflag = 0; \
- goto yyDone; \
+ goto yyacceptlab; \
case yyerr: \
goto yyuser_error; \
+ default: \
+ goto yybuglab; \
} \
- } while (0)
+ } while (YYID (0))
/*----------.
]b4_c_ansi_function_def([yyparse], [int], b4_parse_param)[
{
- yySymbol yytoken;
+ int yyresult;
yyGLRStack yystack;
+ yyGLRStack* const yystackp = &yystack;
size_t yyposn;
-]b4_pure_if(
-[
- YYSTYPE yylval;
- YYLTYPE yylloc;
- #undef yychar
- #define yychar (yystack.yyrawchar)
-])[
-
- YYSTYPE* const yylvalp = &yylval;
- YYLTYPE* const yyllocp = &yylloc;
-
- yyinitGLRStack (&yystack, YYINITDEPTH);
- yystack.yytokenp = &yytoken;
YYDPRINTF ((stderr, "Starting parse\n"));
- if (setjmp (yystack.yyexception_buffer) != 0)
- goto yyDone;
-
+ yychar = YYEMPTY;
yylval = yyval_default;
]b4_location_if([
#if YYLTYPE_IS_TRIVIAL
#endif
])
m4_ifdef([b4_initial_action], [
-m4_pushdef([b4_at_dollar], [yylval])dnl
-m4_pushdef([b4_dollar_dollar], [yylloc])dnl
- /* User initialization code. */
+m4_pushdef([b4_at_dollar], [yylloc])dnl
+m4_pushdef([b4_dollar_dollar], [yylval])dnl
+ /* User initialization code. */
b4_initial_action
m4_popdef([b4_dollar_dollar])dnl
m4_popdef([b4_at_dollar])dnl
/* Line __line__ of glr.c. */
b4_syncline([@oline@], [@ofile@])])dnl
[
- yyglrShift (&yystack, 0, 0, 0, yylval, &yylloc]b4_user_args[);
- yytoken = YYEMPTY;
+ if (! yyinitGLRStack (yystackp, YYINITDEPTH))
+ goto yyexhaustedlab;
+ switch (YYSETJMP (yystack.yyexception_buffer))
+ {
+ case 0: break;
+ case 1: goto yyabortlab;
+ case 2: goto yyexhaustedlab;
+ default: goto yybuglab;
+ }
+ yyglrShift (&yystack, 0, 0, 0, &yylval, &yylloc);
yyposn = 0;
- while (yytrue)
+ while (YYID (yytrue))
{
/* For efficiency, we have two loops, the first of which is
specialized to deterministic operation (single stack, no
potential ambiguity). */
/* Standard mode */
- while (yytrue)
+ while (YYID (yytrue))
{
yyRuleNum yyrule;
int yyaction;
const short int* yyconflicts;
yyStateNum yystate = yystack.yytops.yystates[0]->yylrState;
- YYDPRINTF ((stderr, "Entering state %d\n", yystate));
+ YYDPRINTF ((stderr, "Entering state %d\n", yystate));
if (yystate == YYFINAL)
- goto yyDone;
+ goto yyacceptlab;
if (yyisDefaultedState (yystate))
{
yyrule = yydefaultAction (yystate);
if (yyrule == 0)
{
-]b4_location_if([[ yystack.yyerror_range[0].yystate.yyloc = *yyllocp;]])[
- yyreportSyntaxError (&yystack, yylvalp, yyllocp]b4_user_args[);
+]b4_location_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
+ yyreportSyntaxError (&yystack]b4_user_args[);
goto yyuser_error;
}
- YYCHK1 (yyglrReduce (&yystack, 0, yyrule, yytrue]b4_lpure_args[));
+ YYCHK1 (yyglrReduce (&yystack, 0, yyrule, yytrue]b4_user_args[));
}
else
{
- if (yytoken == YYEMPTY)
+ yySymbol yytoken;
+ if (yychar == YYEMPTY)
{
YYDPRINTF ((stderr, "Reading a token: "));
yychar = YYLEX;
yytoken = YYTRANSLATE (yychar);
- YY_SYMBOL_PRINT ("Next token is", yytoken, yylvalp, yyllocp);
+ YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
}
+ else
+ yytoken = YYTRANSLATE (yychar);
yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts);
if (*yyconflicts != 0)
break;
if (yyisShiftAction (yyaction))
{
- YY_SYMBOL_PRINT ("Shifting", yytoken, yylvalp, yyllocp);
- if (yytoken != YYEOF)
- yytoken = YYEMPTY;
+ YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
+ if (yychar != YYEOF)
+ yychar = YYEMPTY;
yyposn += 1;
- yyglrShift (&yystack, 0, yyaction, yyposn,
- yylval, yyllocp]b4_user_args[);
+ yyglrShift (&yystack, 0, yyaction, yyposn, &yylval, &yylloc);
if (0 < yystack.yyerrState)
yystack.yyerrState -= 1;
}
else if (yyisErrorAction (yyaction))
{
-]b4_location_if([[ yystack.yyerror_range[0].yystate.yyloc = *yyllocp;]])[
- yyreportSyntaxError (&yystack, yylvalp, yyllocp]b4_user_args[);
+]b4_location_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
+ yyreportSyntaxError (&yystack]b4_user_args[);
goto yyuser_error;
}
else
- YYCHK1 (yyglrReduce (&yystack, 0, -yyaction, yytrue]b4_lpure_args[));
+ YYCHK1 (yyglrReduce (&yystack, 0, -yyaction, yytrue]b4_user_args[));
}
}
- while (yytrue)
+ while (YYID (yytrue))
{
- int yys;
- int yyn = yystack.yytops.yysize;
+ yySymbol yytoken_to_shift;
+ size_t yys;
+ size_t yyn = yystack.yytops.yysize;
+
for (yys = 0; yys < yyn; yys += 1)
- YYCHK1 (yyprocessOneStack (&yystack, yys, yyposn,
- yylvalp, yyllocp]b4_user_args[));
- yytoken = YYEMPTY;
- yyposn += 1;
+ yystackp->yytops.yylookaheadNeeds[yys] = yychar != YYEMPTY;
+
+ /* yyprocessOneStack returns one of three things:
+
+ - An error flag. If the caller is yyprocessOneStack, it
+ immediately returns as well. When the caller is finally
+ yyparse, it jumps to an error label via YYCHK1.
+
+ - yyok, but yyprocessOneStack has invoked yymarkStackDeleted
+ (&yystack, yys), which sets the top state of yys to NULL. Thus,
+ yyparse's following invocation of yyremoveDeletes will remove
+ the stack.
+
+ - yyok, when ready to shift a token.
+
+ Except in the first case, yyparse will invoke yyremoveDeletes and
+ then shift the next token onto all remaining stacks. This
+ synchronization of the shift (that is, after all preceding
+ reductions on all stacks) helps prevents double destructor calls
+ on yylval in the event of memory exhaustion. */
+
+ for (yys = 0; yys < yyn; yys += 1)
+ YYCHK1 (yyprocessOneStack (&yystack, yys, yyposn]b4_lpure_args[));
yyremoveDeletes (&yystack);
+ yyn = yystack.yytops.yysize;
+
+ /* If any yyglrShift call fails, it will fail after shifting. Thus,
+ a copy of yylval will already be on stack 0 in the event of a
+ failure in the following loop. Thus, yychar is set to YYEMPTY
+ before the loop to make sure the user destructor for yylval isn't
+ called twice. */
+ yytoken_to_shift = YYTRANSLATE (yychar);
+ yychar = YYEMPTY;
+ yyposn += 1;
+ for (yys = 0; yys < yyn; yys += 1)
+ {
+ int yyaction;
+ const short int* yyconflicts;
+ yyStateNum yystate = yystack.yytops.yystates[yys]->yylrState;
+ yygetLRActions (yystate, yytoken_to_shift, &yyaction,
+ &yyconflicts);
+ /* Note that yyconflicts were handled by yyprocessOneStack. */
+ YYDPRINTF ((stderr, "On stack %lu, ", (unsigned long int) yys));
+ YY_SYMBOL_PRINT ("shifting", yytoken_to_shift, &yylval, &yylloc);
+ yyglrShift (&yystack, yys, yyaction, yyposn,
+ &yylval, &yylloc);
+ YYDPRINTF ((stderr, "Stack %lu now in state #%d\n",
+ (unsigned long int) yys,
+ yystack.yytops.yystates[yys]->yylrState));
+ }
if (yystack.yytops.yysize == 0)
{
yyundeleteLastStack (&yystack);
if (yystack.yytops.yysize == 0)
- yyFail (&yystack][]b4_lpure_args[, "syntax error");
+ yyFail (&yystack][]b4_lpure_args[, YY_("syntax error"));
YYCHK1 (yyresolveStack (&yystack]b4_user_args[));
YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));
-]b4_location_if([[ yystack.yyerror_range[0].yystate.yyloc = *yyllocp;]])[
- yyreportSyntaxError (&yystack, yylvalp, yyllocp]b4_user_args[);
+]b4_location_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
+ yyreportSyntaxError (&yystack]b4_user_args[);
goto yyuser_error;
}
else if (yystack.yytops.yysize == 1)
}
continue;
yyuser_error:
- yyrecoverSyntaxError (&yystack, yylvalp, yyllocp]b4_user_args[);
+ yyrecoverSyntaxError (&yystack]b4_user_args[);
yyposn = yystack.yytops.yystates[0]->yyposn;
}
- yyDone:
- /* On YYABORT, free the lookahead. */
- if (yystack.yyerrflag == 1 && yytoken != YYEMPTY)
- yydestruct ("Error: discarding lookahead",
- yytoken, yylvalp]b4_location_if([, yyllocp])[);
-
- yyfreeGLRStack (&yystack);
- return yystack.yyerrflag;
+
+ yyacceptlab:
+ yyresult = 0;
+ goto yyreturn;
+
+ yybuglab:
+ YYASSERT (yyfalse);
+ goto yyabortlab;
+
+ yyabortlab:
+ yyresult = 1;
+ goto yyreturn;
+
+ yyexhaustedlab:
+ yyerror (]b4_lyyerror_args[YY_("memory exhausted"));
+ yyresult = 2;
+ goto yyreturn;
+
+ yyreturn:
+ if (yychar != YYEOF && yychar != YYEMPTY)
+ yydestruct ("Cleanup: discarding lookahead",
+ YYTRANSLATE (yychar),
+ &yylval]b4_location_if([, &yylloc])[]b4_user_args[);
+
+ /* If the stack is well-formed, pop the stack until it is empty,
+ destroying its entries as we go. But free the stack regardless
+ of whether it is well-formed. */
+ if (yystack.yyitems)
+ {
+ yyGLRState** yystates = yystack.yytops.yystates;
+ if (yystates)
+ {
+ size_t yysize = yystack.yytops.yysize;
+ size_t yyk;
+ for (yyk = 0; yyk < yysize; yyk += 1)
+ if (yystates[yyk])
+ {
+ while (yystates[yyk])
+ {
+ yyGLRState *yys = yystates[yyk];
+]b4_location_if([[ yystack.yyerror_range[1].yystate.yyloc = yys->yyloc;]]
+)[ yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[);
+ yystates[yyk] = yys->yypred;
+ yystack.yynextFree -= 1;
+ yystack.yyspaceLeft += 1;
+ }
+ break;
+ }
+ }
+ yyfreeGLRStack (&yystack);
+ }
+
+ return yyresult;
}
/* DEBUGGING ONLY */
#ifdef YYDEBUG
-static void yypstack (yyGLRStack* yystack, int yyk) ATTRIBUTE_UNUSED;
-static void yypdumpstack (yyGLRStack* yystack) ATTRIBUTE_UNUSED;
+static void yypstack (yyGLRStack* yystackp, size_t yyk)
+ __attribute__ ((__unused__));
+static void yypdumpstack (yyGLRStack* yystackp) __attribute__ ((__unused__));
static void
yy_yypstack (yyGLRState* yys)
}
static void
-yypstack (yyGLRStack* yystack, int yyk)
+yypstack (yyGLRStack* yystackp, size_t yyk)
{
- yypstates (yystack->yytops.yystates[yyk]);
+ yypstates (yystackp->yytops.yystates[yyk]);
}
#define YYINDEX(YYX) \
- ((YYX) == NULL ? -1 : (yyGLRStackItem*) (YYX) - yystack->yyitems)
+ ((YYX) == NULL ? -1 : (yyGLRStackItem*) (YYX) - yystackp->yyitems)
static void
-yypdumpstack (yyGLRStack* yystack)
+yypdumpstack (yyGLRStack* yystackp)
{
yyGLRStackItem* yyp;
size_t yyi;
- for (yyp = yystack->yyitems; yyp < yystack->yynextFree; yyp += 1)
+ for (yyp = yystackp->yyitems; yyp < yystackp->yynextFree; yyp += 1)
{
- fprintf (stderr, "%3lu. ", (unsigned long int) (yyp - yystack->yyitems));
+ fprintf (stderr, "%3lu. ", (unsigned long int) (yyp - yystackp->yyitems));
if (*(yybool *) yyp)
{
fprintf (stderr, "Res: %d, LR State: %d, posn: %lu, pred: %ld",
fprintf (stderr, "\n");
}
fprintf (stderr, "Tops:");
- for (yyi = 0; yyi < yystack->yytops.yysize; yyi += 1)
+ for (yyi = 0; yyi < yystackp->yytops.yysize; yyi += 1)
fprintf (stderr, "%lu: %ld; ", (unsigned long int) yyi,
- (long int) YYINDEX (yystack->yytops.yystates[yyi]));
+ (long int) YYINDEX (yystackp->yytops.yystates[yyi]));
fprintf (stderr, "\n");
}
#endif
b4_epilogue
m4_if(b4_defines_flag, 0, [],
[@output @output_header_name@
-b4_copyright([Skeleton parser for GLR parsing with Bison], [2002, 2003, 2004])
+b4_copyright([Skeleton parser for GLR parsing with Bison],
+ [2002, 2003, 2004, 2005, 2006])[
-b4_token_defines(b4_tokens)
-
-#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED)
-m4_ifdef([b4_stype],
-[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
+/* C GLR parser skeleton written by Paul Hilfinger. */
+]
-b4_pure_if([],
-[extern YYSTYPE b4_prefix[]lval;])
+b4_shared_declarations
-#if ! defined (YYLTYPE) && ! defined (YYLTYPE_IS_DECLARED)
-typedef struct YYLTYPE
-{
-b4_location_if([
- int first_line;
- int first_column;
- int last_line;
- int last_column;
-],[
- char yydummy;
-])
-} YYLTYPE;
-# define YYLTYPE_IS_DECLARED 1
-# define YYLTYPE_IS_TRIVIAL 1
-#endif
+extern YYSTYPE b4_prefix[]lval;
b4_location_if([b4_pure_if([],
[extern YYLTYPE b4_prefix[]lloc;])
projects / bison.git / blobdiff