# We do want M4 expansion after # for CPP macros.
m4_changecom()
m4_divert(0)dnl
-@output @output_parser_name@
+@output b4_parser_file_name
b4_copyright([Skeleton implementation for Bison's Yacc-like parsers in C],dnl '
[1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006])[
]b4_identification
m4_if(b4_prefix, [yy], [],
[/* Substitute the variable and function names. */
-#define yyparse b4_prefix[]parse
-]b4_push_if([#define yypushparse b4_prefix[]pushparse
-#define yypvarsinit b4_prefix[]pvarsinit
-#define yypvars b4_prefix[]pvars])[
+]b4_push_if([#define yypush_parse b4_prefix[]push_parse
+#define yypstate_new b4_prefix[]pstate_new
+#define yypstate_delete b4_prefix[]pstate_delete
+#define yypstate b4_prefix[]pstate],
+[#define yyparse b4_prefix[]parse])[
#define yylex b4_prefix[]lex
#define yyerror b4_prefix[]error
#define yylval b4_prefix[]lval
# define YYLTYPE_IS_TRIVIAL 1
#endif])
+b4_push_if([[#ifndef YYPUSH_DECLS
+# define YYPUSH_DECLS
+struct yypstate;
+typedef struct yypstate yypstate;
+enum { YYPUSH_MORE = 4 };
+]b4_c_function_decl([[yypstate_new]], [[yypstate *]], [[[void]], []])
+b4_c_function_decl([[yypstate_delete]], [[void]],
+ [[[yypstate *yyps]], [[yyps]]])
+b4_c_function_decl([[yypush_parse]], [[int]],
+ [[[yypstate *yyps]], [[yyps]]],
+ [[[int yypushed_char]], [[yypushed_char]]],
+ [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
+ [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])m4_ifset([b4_parse_param], [,
+ b4_parse_param]))[
+#endif
+]])
m4_ifdef([b4_provides],
[[/* Copy the %provides blocks. */
]b4_user_provides])[]dnl
/* A type that is properly aligned for any stack member. */
union yyalloc
{
- yytype_int16 yyss;
- YYSTYPE yyvs;
- ]b4_locations_if([ YYLTYPE yyls;
+ yytype_int16 yyss_alloc;
+ YYSTYPE yyvs_alloc;
+ ]b4_locations_if([ YYLTYPE yyls_alloc;
])dnl
[};
elements in the stack, and YYPTR gives the new location of the
stack. Advance YYPTR to a properly aligned location for the next
stack. */
-# define YYSTACK_RELOCATE(Stack) \
+# define YYSTACK_RELOCATE(Stack_alloc, Stack) \
do \
{ \
YYSIZE_T yynewbytes; \
- YYCOPY (&yyptr->Stack, Stack, yysize); \
- Stack = &yyptr->Stack; \
+ YYCOPY (&yyptr->Stack_alloc, Stack, yysize); \
+ Stack = &yyptr->Stack_alloc; \
yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
yyptr += yynewbytes / sizeof (*yyptr); \
} \
[[YYSTYPE *yyvsp], [yyvsp]],
b4_locations_if([[[YYLTYPE *yylsp], [yylsp]],
])[[int yyrule], [yyrule]]m4_ifset([b4_parse_param], [,
- ])b4_parse_param)[
+ b4_parse_param]))[
{
int yynrhs = yyr2[yyrule];
int yyi;
\f
]b4_yydestruct_generate([b4_c_function_def])[
-\f
-
-/* Prevent warnings from -Wmissing-prototypes. */
+]b4_push_if([],
+[[/* Prevent warnings from -Wmissing-prototypes. */
#ifdef YYPARSE_PARAM
]b4_c_function_decl([yyparse], [int],
[[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[
#else /* ! YYPARSE_PARAM */
]b4_c_function_decl([yyparse], [int], b4_parse_param)[
-#endif /* ! YYPARSE_PARAM */
+#endif /* ! YYPARSE_PARAM */]])
-]b4_push_if([
-struct yypvars;
-enum { YYPUSH_MORE = 4 };
-]b4_c_function_decl([yypvarsinit], [struct yypvars *], [[void], []])[
-]b4_c_function_decl([yypushparse], [int],
- [[struct yypvars *yypvars], [yypvars]],
- [[int yynchar], [yynchar]],
- [[YYSTYPE *yynlval], [yynlval]]
- b4_locations_if([,[[YYLTYPE *yynlloc], [yynlloc]]]))[
-])[
-
-]m4_divert_push([KILL])# ======================== M4 code.
-# b4_declare_parser_variables
-# ---------------------------
+m4_divert_push([KILL])# ======================== M4 code.
+# b4_declare_scanner_communication_variables
+# ------------------------------------------
# Declare the variables that are global, or local to YYPARSE if
# pure-parser.
-m4_define([b4_declare_parser_variables],
-[/* The lookahead symbol. */
+m4_define([b4_declare_scanner_communication_variables],
+[[/* The lookahead symbol. */
int yychar;
/* The semantic value of the lookahead symbol. */
/* Number of syntax errors so far. */
]b4_push_if([],[
-int yynerrs;])[b4_locations_if([
+int yynerrs;])b4_locations_if([[
/* Location data for the lookahead symbol. */
-YYLTYPE yylloc;])
+YYLTYPE yylloc;]])
])
-m4_define([b4_yyssa],b4_push_if([pv->yyssa],[yyssa]))
-m4_define([b4_yyerror_range],b4_push_if([pv->yyerror_range],[yyerror_range]))
+m4_define([b4_yyerror_range],b4_push_if([yyps->yyerror_range],[yyerror_range]))
-# b4_declare_yyparse_variables
-# ----------------------------
-# Declare all the variables that are needed local to YYPARSE
-m4_define([b4_declare_yyparse_variables],
-[[struct yypvars
- {
+# b4_declare_parser_state_variables
+# ---------------------------------
+# Declare all the variables that are needed to maintain the parser state
+# between calls to yypush_parse.
+m4_define([b4_declare_parser_state_variables],
+[[
int yystate;
int yyn;
int yyresult;
/* The semantic value stack. */
YYSTYPE yyvsa[YYINITDEPTH];
YYSTYPE *yyvs;
- YYSTYPE *yyvsp;]]b4_locations_if([[[
+ YYSTYPE *yyvsp;
+]b4_locations_if([[
/* The location stack. */
YYLTYPE yylsa[YYINITDEPTH];
YYLTYPE *yyls;
YYLTYPE *yylsp;
/* The locations where the error started and ended. */
- YYLTYPE yyerror_range[2];]]])[
+ YYLTYPE yyerror_range[2];]])[
YYSIZE_T yystacksize;
/* The variables used to return semantic value and location from the
action routines. */
YYSTYPE yyval;
+]b4_locations_if([[ YYLTYPE yyloc;
+]])])
+
+m4_divert_pop([KILL])dnl# ====================== End of M4 code.
+
+b4_pure_if([], [b4_declare_scanner_communication_variables])
+
+b4_push_if(
+[[struct yypstate
+ {
+ ]b4_declare_parser_state_variables[
/* Used to determine if this is the first time this instance has
been used. */
- int yynew;]b4_locations_if([YYLTYPE yyloc;])[
+ int yynew;
};
/* Initialize the parser data structure. */
-struct yypvars*
-yypvarsinit (void)
+]b4_c_function_def([[yypstate_new]], [[yypstate *]])[
{
- struct yypvars *pv = (struct yypvars *) malloc (sizeof *pv);
- pv->yystate = 0;
- pv->yyresult = -1;
- pv->yyerrstatus = 0;
- pv->yytoken = 0;
-
- pv->yyss = pv->yyssa;
- pv->yyvs = pv->yyvsa;
-
- ]b4_locations_if([
- pv->yyls = pv->yylsa;])[
- pv->yystacksize = YYINITDEPTH;
-
- pv->yyssp = pv->yyss;
- pv->yyvsp = pv->yyvs;
-
- pv->yynew = 1;
-
-]b4_locations_if([ pv->yylsp = pv->yyls;])[
-
- return pv;
-}])
-m4_divert_pop([KILL])dnl# ====================== End of M4 code.
+ yypstate *yyps = (yypstate *) malloc (sizeof *yyps);
+ yyps->yyresult = -1;
+ yyps->yynew = 1;
+ return yyps;
+}
-b4_push_if([],[b4_pure_if([],
- [b4_declare_parser_variables])])
+]b4_c_function_def([[yypstate_delete]], [[void]],
+ [[[yypstate *yyps]], [[yyps]]])[
+{
+ free (yyps);
+}
-b4_push_if([b4_declare_yyparse_variables])
+#define yystate yyps->yystate
+#define yyn yyps->yyn
+#define yyresult yyps->yyresult
+#define yyerrstatus yyps->yyerrstatus
+#define yytoken yyps->yytoken
+#define yyssa yyps->yyssa
+#define yyss yyps->yyss
+#define yyssp yyps->yyssp
+#define yyvsa yyps->yyvsa
+#define yyvs yyps->yyvs
+#define yyvsp yyps->yyvsp
+]b4_locations_if([[#define yylsa yyps->yylsa
+#define yyls yyps->yyls
+#define yylsp yyps->yylsp
+]])[#define yystacksize yyps->yystacksize
+#define yyval yyps->yyval
+]b4_locations_if([[#define yyloc yyps->yyloc
+]])])[
/*-------------------------.
-| yyparse or yypushparse. |
+| yyparse or yypush_parse. |
`-------------------------*/
-b4_push_if([
-b4_c_function_def([yypushparse], [int], [[struct yypvars *yypvars], [yypvars]],
- [[int yynchar], [yynchar]], [[YYSTYPE *yynlval], [yynlval]]
- b4_locations_if([,[[YYLTYPE *yynlloc], [yynlloc]]]))],[
+]b4_push_if([
+b4_c_function_def([[yypush_parse]], [[int]], [[[yypstate *yyps]], [[yyps]]],
+ [[[int yypushed_char]], [[yypushed_char]]],
+ [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
+ [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])m4_ifset([b4_parse_param], [,
+ b4_parse_param]))], [
#ifdef YYPARSE_PARAM
b4_c_function_def([yyparse], [int], [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])
#else /* ! YYPARSE_PARAM */
b4_c_function_def([yyparse], [int], b4_parse_param)
-#endif])
-{[
- ]b4_pure_if([b4_declare_parser_variables])[
- ]b4_push_if([b4_declare_parser_variables])[
- ]b4_push_if([struct yypvars *pv;])[
- int yystate;
- int yyn;
- int yyresult;
- /* Number of tokens to shift before error messages enabled. */
- int yyerrstatus;
- /* Lookahead token as an internal (translated) token number. */
- int yytoken = 0;
+#endif])[
+{
+ ]b4_pure_if([b4_declare_scanner_communication_variables])
+ b4_push_if([], [b4_declare_parser_state_variables])[
+
#if YYERROR_VERBOSE
/* Buffer for error messages, and its allocated size. */
char yymsgbuf[128];
YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
#endif
- /* Three stacks and their tools:
- `yyss': related to states,
- `yyvs': related to semantic values,
- `yyls': related to locations.
-
- Refer to the stacks thru separate pointers, to allow yyoverflow
- to reallocate them elsewhere. */
-
- /* The state stack. */
- yytype_int16 yyssa[YYINITDEPTH];
- yytype_int16 *yyss = yyssa;
- yytype_int16 *yyssp;
-
- /* The semantic value stack. */
- YYSTYPE yyvsa[YYINITDEPTH];
- YYSTYPE *yyvs = yyvsa;
- YYSTYPE *yyvsp;
-
-]b4_locations_if(
-[[ /* The location stack. */
- YYLTYPE yylsa[YYINITDEPTH];
- YYLTYPE *yyls = yylsa;
- YYLTYPE *yylsp;
- /* The locations where the error started and ended. */
- ]b4_push_if([],[YYLTYPE yyerror_range[[2]]])[;
- ]])[
-
#define YYPOPSTACK(N) (yyvsp -= (N), yyssp -= (N)]b4_locations_if([, yylsp -= (N)])[)
- YYSIZE_T yystacksize = YYINITDEPTH;
-
- /* The variables used to return semantic value and location from the
- action routines. */
- YYSTYPE yyval;
-]b4_locations_if([ YYLTYPE yyloc;])[
-
/* The number of symbols on the RHS of the reduced rule.
Keep to zero when no symbol should be popped. */
int yylen = 0;
+]b4_push_if([[
+ if (!yyps->yynew)
+ goto yyread_pushed_token;
+]])[
+ yytoken = 0;
+ yyss = yyssa;
+ yyvs = yyvsa;
+]b4_locations_if([[ yyls = yylsa;
+]])[
+ yystacksize = YYINITDEPTH;
YYDPRINTF ((stderr, "Starting parse\n"));
yystate = 0;
yyerrstatus = 0;
-]b4_push_if([ yychar = yynchar;
- pv = yypvars;
- if (yynlval)
- yylval = *yynlval;
-]b4_locations_if([ if (yynlloc)
- yylloc = *yynlloc;])[],[yynerrs = 0;
- yychar = YYEMPTY; /* Cause a token to be read. */])[
+]b4_push_if([], [[ yynerrs = 0;]])[
+ yychar = YYEMPTY; /* Cause a token to be read. */
/* Initialize stack pointers.
Waste one element of value and location stack
so that they stay on the same level as the state stack.
The wasted elements are never initialized. */
-
yyssp = yyss;
yyvsp = yyvs;
]b4_locations_if([[ yylsp = yyls;
-]b4_push_if([],[
+
#if YYLTYPE_IS_TRIVIAL
/* Initialize the default location before parsing starts. */
yylloc.first_line = yylloc.last_line = ]b4_location_initial_line[;
yylloc.first_column = yylloc.last_column = ]b4_location_initial_column[;
-#endif])[
+#endif
]])
m4_ifdef([b4_initial_action], [
m4_pushdef([b4_at_dollar], [m4_define([b4_at_dollar_used])yylloc])dnl
m4_pushdef([b4_dollar_dollar], [m4_define([b4_dollar_dollar_used])yylval])dnl
- /* User initialization code. */
+/* User initialization code. */
b4_user_initial_action
m4_popdef([b4_dollar_dollar])dnl
m4_popdef([b4_at_dollar])])dnl
]])dnl
m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc;
]])dnl
-[ ]b4_push_if([
- /* Initialize the locals to the current context. */
- yystate = pv->yystate;
- yyn = pv->yyn;
- yyresult = pv->yyresult;
- yyerrstatus = pv->yyerrstatus;
- yytoken = pv->yytoken;
-
- yyss = pv->yyss;
- yyssp = pv->yyssp;
-
- yyvs = pv->yyvs;
- yyvsp = pv->yyvsp;
-
- ]b4_locations_if([[ /* The location stack. */
- yyls = pv->yyls;
- yylsp = pv->yylsp;]])[
-
- yystacksize = pv->yystacksize;
- yyval = pv->yyval;
- ]b4_locations_if([yyloc = pv->yyloc;])[
- if (pv->yynew == 0)
- {
- goto gottoken;
- }
- pv->yynew= 0;])[
+[
goto yysetstate;
/*------------------------------------------------------------.
(union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
if (! yyptr)
goto yyexhaustedlab;
- YYSTACK_RELOCATE (yyss);
- YYSTACK_RELOCATE (yyvs);
-]b4_locations_if([ YYSTACK_RELOCATE (yyls);])[
+ YYSTACK_RELOCATE (yyss_alloc, yyss);
+ YYSTACK_RELOCATE (yyvs_alloc, yyvs);
+]b4_locations_if([ YYSTACK_RELOCATE (yyls_alloc, yyls);])[
# undef YYSTACK_RELOCATE
- if (yyss1 != ]b4_yyssa[)
+ if (yyss1 != yyssa)
YYSTACK_FREE (yyss1);
}
# endif
/* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol. */
if (yychar == YYEMPTY)
{
- ]b4_push_if([
- YYDPRINTF ((stderr, "Return for a new token:\n"));
- yyresult = YYPUSH_MORE;
- /* Initialize the locals to the current context. */
- pv->yystate = yystate;
- pv->yyn = yyn;
- pv->yyerrstatus = yyerrstatus;
- pv->yytoken = yytoken;
-
- pv->yyss = yyss;
- pv->yyssp = yyssp;
-
- pv->yyvs = yyvs;
- pv->yyvsp = yyvsp;
-
- ]b4_locations_if([[ /* The location stack. */
- pv->yyls = yyls;
- pv->yylsp = yylsp;]])[
-
- pv->yystacksize = yystacksize;
- pv->yyval = yyval;
- ]b4_locations_if([pv->yyloc = yyloc;])[
- goto yypushreturn;
-gottoken:])[
- YYDPRINTF ((stderr, "Reading a token: "));
- ]b4_push_if([], [yychar = YYLEX;])[
- }
+]b4_push_if([[ if (!yyps->yynew)
+ {
+ YYDPRINTF ((stderr, "Return for a new token:\n"));
+ yyresult = YYPUSH_MORE;
+ goto yypushreturn;
+ }
+ yyps->yynew = 0;
+
+yyread_pushed_token:
+]])[ YYDPRINTF ((stderr, "Reading a token: "));
+]b4_push_if([[ yychar = yypushed_char;
+ if (yypushed_val)
+ yylval = *yypushed_val;
+]b4_locations_if([[ if (yypushed_loc)
+ yylloc = *yypushed_loc;]])],
+[[ yychar = YYLEX;
+]])[ }
if (yychar <= YYEOF)
{
YYPOPSTACK (1);
}
#ifndef yyoverflow
- if (yyss != ]b4_yyssa[)
+ if (yyss != yyssa)
YYSTACK_FREE (yyss);
#endif
]b4_push_if([yypushreturn:])[
if (yymsg != yymsgbuf)
YYSTACK_FREE (yymsg);
#endif
- ]b4_push_if([pv->yyresult = YYID (yyresult);])[
/* Make sure YYID is used. */
return YYID (yyresult);
]}
b4_epilogue
b4_defines_if(
-[@output @output_header_name@
+[@output b4_spec_defines_file
b4_copyright([Skeleton interface for Bison's Yacc-like parsers in C],dnl '
[1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006])
# define YYLTYPE_IS_TRIVIAL 1
#endif
-]b4_push_if([struct ]b4_prefix[pvars;
-enum { YYPUSH_MORE = 4 };])[
]b4_pure_if([],
[extern YYLTYPE b4_prefix[]lloc;])
)dnl b4_locations_if
+b4_push_if([[#ifndef YYPUSH_DECLS
+# define YYPUSH_DECLS
+struct ]b4_prefix[pstate;
+typedef struct ]b4_prefix[pstate ]b4_prefix[pstate;
+enum { YYPUSH_MORE = 4 };
+]b4_c_function_decl([b4_prefix[pstate_new]], [b4_prefix[pstate *]],
+ [[[void]], []])
+b4_c_function_decl([b4_prefix[pstate_delete]], [[void]],
+ [[b4_prefix[pstate *yyps]], [[yyps]]])
+b4_c_function_decl([b4_prefix[push_parse]], [[int]],
+ [[b4_prefix[pstate *yyps]], [[yyps]]],
+ [[[int yypushed_char]], [[yypushed_char]]],
+ [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
+ [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])m4_ifset([b4_parse_param], [,
+ b4_parse_param]))[
+#endif
+]])
m4_ifdef([b4_provides],
[[/* Copy the %provides blocks. */
]b4_user_provides])[]
projects / bison.git / blobdiff