# 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])
+
+# Location type.
+m4_define_default([b4_location_type], [yyltype])
+
+
+## ------------------------ ##
+## Pure/impure interfaces. ##
+## ------------------------ ##
+
+
+# b4_Pure_if(IF-TRUE, IF-FALSE)
+# -----------------------------
+# Expand IF-TRUE, if %pure-parser and %parse-param, IF-FALSE otherwise.
+m4_define([b4_Pure_if],
+[b4_pure_if([m4_ifset([b4_parse_param],
+ [$1], [$2])],
+ [$2])])
+
+
+# b4_pure_args
+# ------------
+# Arguments passed to yyerror: user args plus yylloc.
+m4_define([b4_pure_args],
+[b4_Pure_if([b4_location_if([, &yylloc])])[]b4_user_args])
+
+
+# b4_lex_param
+# ------------
+# Accumule in b4_lex_param all the yylex arguments.
+# b4_lex_param arrives quoted twice, but we want to keep only one level.
+m4_define([b4_lex_param],
+m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl
+b4_location_if([, [[YYLTYPE *], [&yylloc]]])])dnl
+m4_ifdef([b4_lex_param], [, ]b4_lex_param)))
+
+
+
+## ------------ ##
+## Data Types. ##
+## ------------ ##
+
+# b4_int_type(MIN, MAX)
+# ---------------------
+# Return the smallest int type able to handle numbers ranging from
+# MIN to MAX (included). We overwrite the version from c.m4 which relies
+# on "signed char" which is not portable to old K&R compilers.
+m4_define([b4_int_type],
+[m4_if(b4_ints_in($@, [0], [255]), [1], [unsigned char],
+ b4_ints_in($@, [-128], [127]), [1], [yysigned_char],
+
+ b4_ints_in($@, [0], [65535]), [1], [unsigned short],
+ b4_ints_in($@, [-32768], [32767]), [1], [short],
+
+ m4_eval([0 <= $1]), [1], [unsigned int],
+
+ [int])])
+
+
+## ----------------- ##
+## Semantic Values. ##
+## ----------------- ##
+
+
# b4_lhs_value([TYPE])
# --------------------
# Expansion of $<TYPE>$.
## 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],
- [$2])])
-
-
# b4_lhs_location()
# -----------------
# Expansion of @$.
-## -------------- ##
-## %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. ##
## ------------------- ##
])
-
+# 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 Yacc-like parsing with Bison],
[1984, 1989, 1990, 2000, 2001, 2002])
+/* As a special exception, when this file is copied by Bison into a
+ Bison output file, you may use that output file without restriction.
+ This special exception was added by the Free Software Foundation
+ in version 1.24 of Bison. */
+
/* Written by Richard Stallman by simplifying the original so called
``semantic'' parser. */
define necessary library symbols; they are noted "INFRINGES ON
USER NAME SPACE" below. */
-/* Identify Bison output. */
-#define YYBISON 1
-
-/* Pure parsers. */
-#define YYPURE b4_pure
-
-/* Using locations. */
-#define YYLSP_NEEDED b4_locations_flag
-
+b4_identification
m4_if(b4_prefix[], [yy], [],
[/* If NAME_PREFIX is specified substitute the variables and functions
names. */
#define yynerrs b4_prefix[]nerrs
b4_location_if([#define yylloc b4_prefix[]lloc])])
+b4_token_defines(b4_tokens)
+
/* Copy the first part of user declarations. */
b4_pre_prologue
-b4_token_defines(b4_tokens)
-
/* Enabling traces. */
#ifndef YYDEBUG
# define YYDEBUG b4_debug
int last_line;
int last_column;
} yyltype;
-# define YYLTYPE b4_ltype
+# define YYLTYPE b4_location_type
# define YYLTYPE_IS_TRIVIAL 1
#endif
#endif
+#if defined (__STDC__) || defined (__cplusplus)
+ typedef signed char yysigned_char;
+#else
+ typedef short yysigned_char;
+#endif
+
/* 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. */
};
#endif
+# ifdef YYPRINT
/* YYTOKNUM[[YYLEX-NUM]] -- Internal token number corresponding to
token YYLEX-NUM. */
static const b4_int_type_for([b4_toknum]) yytoknum[[]] =
{
b4_toknum
};
+# endif
/* YYR1[[YYN]] -- Symbol number of symbol that rule YYN derives. */
static const b4_int_type_for([b4_r1]) yyr1[[]] =
/* 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, parse error. */
#define YYTABLE_NINF b4_table_ninf
static const b4_int_type_for([b4_table]) yytable[[]] =
{
} \
else \
{ \
- yyerror ("syntax error: cannot back up"); \
+ yyerror ("syntax error: cannot back up"b4_pure_args); \
YYERROR; \
} \
while (0)
/* YYLEX -- calling `yylex' with the right arguments. */
-b4_pure_if(
-[#ifdef YYLEX_PARAM
-# define YYLEX yylex (&yylval[]b4_location_if([, &yylloc]), YYLEX_PARAM)
+#ifdef YYLEX_PARAM
+# define YYLEX yylex (b4_pure_if([&yylval[]b4_location_if([, &yylloc]), ])YYLEX_PARAM)
#else
-# define YYLEX yylex (&yylval[]b4_location_if([, &yylloc]))
-#endif],
-[#define YYLEX yylex ()])
+# define YYLEX b4_c_function_call([yylex], [int], b4_lex_param)
+#endif
/* Enable debugging if requested. */
#if 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
\f
| Print this symbol on YYOUT. |
`-----------------------------*/
-b4_c_function([yysymprint],
- [static void],
- [[FILE*], [yyout]],
- [[int], [yytype]],
- [[YYSTYPE], [yyvalue]]b4_location_if([,
- [[YYLTYPE], [yylocation]]]))
+b4_c_function_def([yysymprint],
+ [static void],
+ [[FILE *yyout], [yyout]],
+ [[int yytype], [yytype]],
+ [[YYSTYPE yyvalue], [yyvalue]]b4_location_if([,
+ [[YYLTYPE yylocation], [yylocation]]]))
{
/* Pacify ``unused variable'' warnings. */
(void) yyvalue;
#endif /* YYDEBUG. */
-/*----------------------------------------------------------.
-| yyreport_parse_error -- report a parse error in YYSTATE. |
-`----------------------------------------------------------*/
-
-b4_c_function([yyreport_parse_error],
- [static void],
- [[int], [yystate]],
- [[int], [yychar]],
- [[YYSTYPE], [yyvalue]]b4_location_if([,
- [[YYLTYPE], [yylocation]]]))
-[{
-#if YYERROR_VERBOSE
- int yyn = yypact[yystate];
-
- if (YYPACT_NINF < yyn && yyn < YYLAST)
- {
- YYSIZE_T yysize = 0;
- int yytype = YYTRANSLATE (yychar);
- char *yymsg;
- int yyx, yycount;
-
- yycount = 0;
- /* Start YYX at -YYN if negative to avoid negative indexes in
- YYCHECK. */
- for (yyx = yyn < 0 ? -yyn : 0;
- yyx < (int) (sizeof (yytname) / sizeof (char *)); yyx++)
- if (yycheck[yyx + yyn] == yyx)
- yysize += yystrlen (yytname[yyx]) + 15, yycount++;
- yysize += yystrlen ("parse error, unexpected ") + 1;
- yysize += yystrlen (yytname[yytype]);
- yymsg = (char *) YYSTACK_ALLOC (yysize);
- if (yymsg != 0)
- {
- char *yyp = yystpcpy (yymsg, "parse error, unexpected ");
- yyp = yystpcpy (yyp, yytname[yytype]);
-
- if (yycount < 5)
- {
- yycount = 0;
- for (yyx = yyn < 0 ? -yyn : 0;
- yyx < (int) (sizeof (yytname) / sizeof (char *));
- yyx++)
- if (yycheck[yyx + yyn] == yyx)
- {
- const char *yyq = ! yycount ? ", expecting " : " or ";
- yyp = yystpcpy (yyp, yyq);
- yyp = yystpcpy (yyp, yytname[yyx]);
- yycount++;
- }
- }
- yyerror (yymsg);
- YYSTACK_FREE (yymsg);
- }
- else
- yyerror ("parse error; also virtual memory exhausted");
- }
- else
-#endif /* YYERROR_VERBOSE */
- yyerror ("parse error");
-
- /* Pacify ``unused variable'' warnings. */
- (void) yystate;
- (void) yychar;
- (void) yyvalue;
- ]b4_location_if([(void) yylocation;])[
-}]
-
-
/*-----------------------------------------------.
| Release the memory associated to this symbol. |
`-----------------------------------------------*/
-b4_c_function([yydestruct],
- [static void],
- [[int], [yytype]],
- [[YYSTYPE], [yyvalue]]b4_location_if([,
- [[YYLTYPE], [yylocation]]]))
+b4_c_function_def([yydestruct],
+ [static void],
+ [[int yytype], [yytype]],
+ [[YYSTYPE yyvalue], [yyvalue]]b4_location_if([,
+ [[YYLTYPE yylocation], [yylocation]]]))
{
/* Pacify ``unused variable'' warnings. */
(void) yyvalue;
\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. */
+/* Prevent warnings from -Wmissing-prototypes. */
#ifdef YYPARSE_PARAM
# if defined (__STDC__) || defined (__cplusplus)
-# define YYPARSE_PARAM_ARG void *YYPARSE_PARAM
-# define YYPARSE_PARAM_DECL
+int yyparse (void *YYPARSE_PARAM);
# else
-# define YYPARSE_PARAM_ARG YYPARSE_PARAM
-# define YYPARSE_PARAM_DECL void *YYPARSE_PARAM;
-# endif
-#else /* !YYPARSE_PARAM */
-# define YYPARSE_PARAM_ARG
-# define YYPARSE_PARAM_DECL
-#endif /* !YYPARSE_PARAM */
-
-/* Prevent warning if -Wstrict-prototypes. */
-#ifdef __GNUC__
-# ifdef YYPARSE_PARAM
-int yyparse (void *);
-# else
-int yyparse (void);
+int yyparse ();
# endif
+#else /* ! YYPARSE_PARAM */
+b4_c_function_decl([yyparse], [int], b4_parse_param)
#endif
+
m4_divert_push([KILL])# ======================== M4 code.
# b4_declare_parser_variables
# ---------------------------
# Declare the variables that are global, or local to YYPARSE if
-# pure-parser
+# pure-parser.
m4_define([b4_declare_parser_variables],
[/* The lookahead symbol. */
int yychar;
b4_pure_if([],
[b4_declare_parser_variables])
-int
-yyparse (YYPARSE_PARAM_ARG)
- YYPARSE_PARAM_DECL
+
+/*----------.
+| yyparse. |
+`----------*/
+
+#ifdef YYPARSE_PARAM
+# if defined (__STDC__) || defined (__cplusplus)
+int yyparse (void *YYPARSE_PARAM)
+# else
+int yyparse (YYPARSE_PARAM)
+ void *YYPARSE_PARAM;
+# endif
+#else /* ! YYPARSE_PARAM */
+b4_c_function_def([yyparse], [int], b4_parse_param)
+#endif
{[
]b4_pure_if([b4_declare_parser_variables])[
register int yystate;
yysetstate:
*yyssp = yystate;
- if (yyssp >= yyss + yystacksize - 1)
+ if (yyss + yystacksize - 1 <= yyssp)
{
/* Get the current used size of the three stacks, in elements. */
YYSIZE_T yysize = yyssp - yyss + 1;
goto yyoverflowlab;
# else
/* Extend the stack our own way. */
- if (yystacksize >= YYMAXDEPTH)
+ if (YYMAXDEPTH <= yystacksize)
goto yyoverflowlab;
yystacksize *= 2;
- if (yystacksize > YYMAXDEPTH)
+ if (YYMAXDEPTH < yystacksize)
yystacksize = YYMAXDEPTH;
{
YYDPRINTF ((stderr, "Stack size increased to %lu\n",
(unsigned long int) yystacksize));
- if (yyssp >= yyss + yystacksize - 1)
+ if (yyss + yystacksize - 1 <= yyssp)
YYABORT;
}
YYDPRINTF ((stderr, "\n"));
}
+ /* If the proper action on seeing token YYCHAR1 is to reduce or to
+ detect an error, take that action. */
yyn += yychar1;
if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yychar1)
goto yydefault;
-
yyn = yytable[yyn];
-
- /* yyn is what to do for this token type in this state.
- Negative => reduce, -yyn is rule number.
- Positive => shift, yyn is new state.
- New state is final state => don't bother to shift,
- just return success.
- 0, or most negative number => error. */
-
- if (yyn < 0)
+ if (yyn <= 0)
{
- if (yyn == YYTABLE_NINF)
+ if (yyn == 0 || yyn == YYTABLE_NINF)
goto yyerrlab;
yyn = -yyn;
goto yyreduce;
}
- else if (yyn == 0)
- goto yyerrlab;
if (yyn == YYFINAL)
YYACCEPT;
/* If YYLEN is nonzero, implement the default value of the action:
`$$ = $1'.
- Otherwise, the following line sets YYVAL to the semantic value of
- the lookahead token. This behavior is undocumented and Bison
+ Otherwise, the following line sets YYVAL to garbage.
+ This behavior is undocumented and Bison
users should not rely upon it. Assigning to YYVAL
unconditionally makes the parser a bit smaller, and it avoids a
GCC warning that YYVAL may be used uninitialized. */
yyn - 1, yyrline[yyn]);
/* Print the symbols being reduced, and their result. */
- for (yyi = yyprhs[yyn]; yyrhs[yyi] >= 0; yyi++)
+ for (yyi = yyprhs[yyn]; 0 <= yyrhs[yyi]; yyi++)
YYFPRINTF (stderr, "%s ", yytname[yyrhs[yyi]]);
YYFPRINTF (stderr, " -> %s\n", yytname[yyr1[yyn]]);
}
if (!yyerrstatus)
{
++yynerrs;
- yyreport_parse_error (yystate, yychar, yylval]b4_location_if([, yylloc])[);
+#if YYERROR_VERBOSE
+ yyn = yypact[yystate];
+
+ if (YYPACT_NINF < yyn && yyn < YYLAST)
+ {
+ YYSIZE_T yysize = 0;
+ int yytype = YYTRANSLATE (yychar);
+ char *yymsg;
+ int yyx, yycount;
+
+ yycount = 0;
+ /* Start YYX at -YYN if negative to avoid negative indexes in
+ YYCHECK. */
+ for (yyx = yyn < 0 ? -yyn : 0;
+ yyx < (int) (sizeof (yytname) / sizeof (char *)); yyx++)
+ if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
+ yysize += yystrlen (yytname[yyx]) + 15, yycount++;
+ yysize += yystrlen ("parse error, unexpected ") + 1;
+ yysize += yystrlen (yytname[yytype]);
+ yymsg = (char *) YYSTACK_ALLOC (yysize);
+ if (yymsg != 0)
+ {
+ char *yyp = yystpcpy (yymsg, "parse error, unexpected ");
+ yyp = yystpcpy (yyp, yytname[yytype]);
+
+ if (yycount < 5)
+ {
+ yycount = 0;
+ for (yyx = yyn < 0 ? -yyn : 0;
+ yyx < (int) (sizeof (yytname) / sizeof (char *));
+ yyx++)
+ if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
+ {
+ const char *yyq = ! yycount ? ", expecting " : " or ";
+ yyp = yystpcpy (yyp, yyq);
+ yyp = yystpcpy (yyp, yytname[yyx]);
+ yycount++;
+ }
+ }
+ yyerror (yymsg]b4_pure_args[);
+ YYSTACK_FREE (yymsg);
+ }
+ else
+ yyerror ("parse error; also virtual memory exhausted"]b4_pure_args[);
+ }
+ else
+#endif /* YYERROR_VERBOSE */
+ yyerror ("parse error"]b4_pure_args[);
}
goto yyerrlab1;
/* Pop the error token. */
YYPOPSTACK;
/* Pop the rest of the stack. */
- while (yyssp > yyss)
+ while (yyss < yyssp)
{
YYDPRINTF ((stderr, "Error: popping "));
YYDSYMPRINT ((stderr,
| yyoverflowlab -- parser overflow comes here. |
`----------------------------------------------*/
yyoverflowlab:
- yyerror ("parser stack overflow");
+ yyerror ("parser stack overflow"]b4_pure_args[);
yyresult = 2;
/* Fall through. */
#endif
m4_if(b4_defines_flag, 0, [],
[#output "b4_output_header_name"
b4_copyright([Skeleton parser for Yacc-like parsing with Bison],
- [1984, 1989, 1990, 2000, 2001, 2002])
+ [1984, 1989, 1990, 2000, 2001, 2002])
+
+/* As a special exception, when this file is copied by Bison into a
+ Bison output file, you may use that output file without restriction.
+ This special exception was added by the Free Software Foundation
+ in version 1.24 of Bison. */
#ifndef b4_header_guard
# define b4_header_guard
projects / bison.git / blobdiff