# C++ skeleton for Bison
-# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008
+# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
# Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
m4_copy([b4_symbol_value], [b4_symbol_value_template])
-# b4_lex_symbol_if([IF-YYLEX-RETURNS-A-COMPLETE-SYMBOL], [IF-NOT])
-# ----------------------------------------------------------------
-m4_define([b4_lex_symbol_if],
-[b4_percent_define_ifdef([[lex_symbol]], [$1], [$2])])
-
-
-# b4_assert_if([IF-ASSERTIONS-ARE-USED], [IF-NOT])
-# ------------------------------------------------
-m4_define([b4_assert_if],
-[b4_percent_define_ifdef([[assert]], [$1], [$2])])
-
-
# b4_lhs_value([TYPE])
# --------------------
# Expansion of $<TYPE>$.
m4_popdef([b4_dollar_dollar])dnl
])])
-# b4_symbol_constructor_declaration_(SYMBOL-NUMBER)
-# -------------------------------------------------
-# Declare the overloaded version of make_symbol for the (common) type of
-# these SYMBOL-NUMBERS. Use at class-level.
-m4_define([b4_symbol_constructor_declaration_],
-[b4_symbol_if([$1], [is_token], [b4_symbol_if([$1], [has_id],
-[ static inline
- symbol_type
- make_[]b4_symbol_([$1], [id]) (dnl
-b4_args(b4_symbol_if([$1], [has_type],
- [const b4_symbol([$1], [type])& v]),
- b4_locations_if([const location_type& l])));
-
-])])])
-
-
-# b4_symbol_constructor_declarations
-# ----------------------------------
-# Declare symbol constructors for all the value types.
-# Use at class-level.
-m4_define([b4_symbol_constructor_declarations],
-[b4_variant_if([
- // Symbol constructors declarations.
-b4_symbol_foreach([b4_symbol_constructor_declaration_])])])
-
-
-
-# b4_symbol_constructor_definition_(SYMBOL-NUMBER)
-# ------------------------------------------------
-# Define symbol constructor for this SYMBOL-NUMBER.
-m4_define([b4_symbol_constructor_definition_],
-[b4_symbol_if([$1], [is_token], [b4_symbol_if([$1], [has_id],
-[ b4_parser_class_name::symbol_type
- b4_parser_class_name::make_[]b4_symbol_([$1], [id]) (dnl
-b4_args(b4_symbol_if([$1], [has_type],
- [const b4_symbol([$1], [type])& v]),
- b4_locations_if([const location_type& l])))
- {
- return symbol_type (b4_args([yytranslate_ (token::b4_symbol([$1], [id]))],
- b4_symbol_if([$1], [has_type], [v]),
- b4_locations_if([l])));
- }
-
-])])])
-
-
-# b4_symbol_constructor_definitions
-# ----------------------------------
-# Define the overloaded versions of make_symbol for all the value types.
-m4_define([b4_symbol_constructor_definitions],
-[b4_variant_if([
- // Implementation of make_symbol for each symbol type.
-b4_symbol_foreach([b4_symbol_constructor_definition_])])])
-
-
-# b4_yytranslate_definition
-# -------------------------
-# Define yytranslate_. Sometimes we want it in the header file,
-# sometimes the cc file suffices.
-m4_define([b4_yytranslate_definition],
-[[ // Symbol number corresponding to token number t.
- ]b4_parser_class_name[::token_number_type
- ]b4_parser_class_name[::yytranslate_ (]b4_lex_symbol_if([token_type],
- [int])[ t)
- {
- static
- const token_number_type
- translate_table[] =
- {
-]b4_translate[
- };
- const unsigned int user_token_number_max_ = ]b4_user_token_number_max[;
- const token_number_type undef_token_ = ]b4_undef_token_number[;
-
- if (static_cast<int>(t) <= yyeof_)
- return yyeof_;
- else if (static_cast<unsigned int> (t) <= user_token_number_max_)
- return translate_table[t];
- else
- return undef_token_;
- }
-]])
-
m4_pushdef([b4_copyright_years],
- [2002, 2003, 2004, 2005, 2006, 2007, 2008])
+ [2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009])
m4_define([b4_parser_class_name],
[b4_percent_define_get([[parser_class_name]])])
]b4_percent_code_get([[requires]])[
-]b4_assert_if([#include <cassert>])[
+]b4_parse_assert_if([#include <cassert>])[
#include <string>
#include <iostream>
#include "stack.hh"
]b4_namespace_open[
]b4_locations_if([ class position;
class location;])[
-]b4_variant_if([b4_variant_definition])[
+]b4_variant_if([b4_variant_define])[
]b4_namespace_close[
]b4_locations_if([#include "location.hh"])[
/* Enabling traces. */
#ifndef YYDEBUG
-# define YYDEBUG ]b4_debug_flag[
+# define YYDEBUG ]b4_parse_trace_if([1], [0])[
#endif
/* Enabling verbose error messages. */
# undef YYERROR_VERBOSE
# define YYERROR_VERBOSE 1
#else
-# define YYERROR_VERBOSE ]b4_error_verbose_flag[
+# define YYERROR_VERBOSE ]b4_error_verbose_if([1], [0])[
#endif
/* Enabling the token table. */
{
public:
]b4_public_types_declare[
-]b4_symbol_constructor_declarations[
/// Build a parser object.
]b4_parser_class_name[ (]b4_parse_param_decl[);
virtual ~]b4_parser_class_name[ ();
virtual void error (]b4_locations_if([const location_type& loc, ])[const std::string& msg);
private:
- /// Generate an error message.
- /// \param state the state where the error occurred.
- /// \param tok the lookahead token.
- virtual std::string yysyntax_error_ (int yystate, int tok);
-
/// State numbers.
typedef int state_type;
+ /// Generate an error message.
+ /// \param yystate the state where the error occurred.
+ /// \param yytoken the lookahead token.
+ virtual std::string yysyntax_error_ (state_type yystate, int yytoken);
+
+ /// Compute post-reduction state.
+ /// \param yystate the current state
+ /// \param yylhs the nonterminal to push on the stack
+ state_type yy_lr_goto_state_ (state_type yystate, int yylhs);
+
/// Internal symbol numbers.
typedef ]b4_int_type_for([b4_translate])[ token_number_type;
static const ]b4_int_type(b4_pact_ninf, b4_pact_ninf)[ yypact_ninf_;
]b4_parse_param_vars[
};
-]b4_lex_symbol_if([b4_yytranslate_definition
-b4_public_types_define
-b4_symbol_constructor_definitions])[
+]b4_lex_symbol_if([b4_yytranslate_define
+b4_public_types_define])[
]b4_namespace_close[
]b4_percent_define_flag_if([[global_tokens_and_yystype]],
| Symbol types. |
`---------------*/
-]b4_lex_symbol_if([], [b4_public_types_define
-b4_symbol_constructor_definitions])[
+]b4_lex_symbol_if([], [b4_public_types_define])[
// stack_symbol_type.
]b4_parser_class_name[::stack_symbol_type::stack_symbol_type ()
}
#endif
+ inline ]b4_parser_class_name[::state_type
+ ]b4_parser_class_name[::yy_lr_goto_state_ (state_type yystate, int yylhs)
+ {
+ int yyr = yypgoto_[yylhs - yyntokens_] + yystate;
+ if (0 <= yyr && yyr <= yylast_ && yycheck_[yyr] == yystate)
+ return yytable_[yyr];
+ else
+ return yydefgoto_[yylhs - yyntokens_];
+ }
+
int
]b4_parser_class_name[::parse ()
{
/* State. */
int yyn;
int yylen = 0;
- int yystate = 0;
/* Error handling. */
int yynerrs_ = 0;
yystack_ = stack_type (0);
yypush_ (0, 0, yyla);
- // A new state was pushed on the stack.
- // Invariant: yystate == yystack_[0].state, i.e.,
- // yystate was just pushed onto the state stack.
+ // A new symbol was pushed on the stack.
yynewstate:
- YYCDEBUG << "Entering state " << yystate << std::endl;
+ YYCDEBUG << "Entering state " << yystack_[0].state << std::endl;
/* Accept? */
- if (yystate == yyfinal_)
+ if (yystack_[0].state == yyfinal_)
goto yyacceptlab;
goto yybackup;
yybackup:
/* Try to take a decision without lookahead. */
- yyn = yypact_[yystate];
+ yyn = yypact_[yystack_[0].state];
if (yyn == yypact_ninf_)
goto yydefault;
--yyerrstatus_;
/* Shift the lookahead token. */
- yystate = yyn;
- yypush_ ("Shifting", yystate, yyla);
+ yypush_ ("Shifting", yyn, yyla);
goto yynewstate;
/*-----------------------------------------------------------.
| yydefault -- do the default action for the current state. |
`-----------------------------------------------------------*/
yydefault:
- yyn = yydefact_[yystate];
+ yyn = yydefact_[yystack_[0].state];
if (yyn == 0)
goto yyerrlab;
goto yyreduce;
| yyreduce -- Do a reduction. |
`-----------------------------*/
yyreduce:
- yylen = yyr2_[yyn];]b4_variant_if([
+ yylen = yyr2_[yyn];
+ yylhs.state = yy_lr_goto_state_(yystack_[yylen].state, yyr1_[yyn]);]b4_variant_if([
/* Variants are always initialized to an empty instance of the
correct type. The default $$=$1 action is NOT applied when using
variants. */
- ]b4_symbol_variant([[yyr1_@{yyn@}]], [yylhs.value], [build]),[
+ b4_symbol_variant([[yyr1_@{yyn@}]], [yylhs.value], [build])],[
/* If YYLEN is nonzero, implement the default value of the action:
`$$ = $1'. Otherwise, use the top of the stack.
default:
break;
}
- // Compute post-reduction state.
- yyn = yyr1_[yyn];
- yystate = yypgoto_[yyn - yyntokens_] + yystack_[yylen].state;
- if (0 <= yystate && yystate <= yylast_
- && yycheck_[yystate] == yystack_[yylen].state)
- yystate = yytable_[yystate];
- else
- yystate = yydefgoto_[yyn - yyntokens_];
- yylhs.state = yystate;
YY_SYMBOL_PRINT ("-> $$ =", yylhs);
]b4_variant_if([[
// Destroy the rhs symbols.
{
++yynerrs_;
error (]b4_args(b4_locations_if([yyla.location]),
- [yysyntax_error_ (yystate, yyla.type)])[);
+ [[yysyntax_error_ (yystack_[0].state, yyla.type)]])[);
}
]b4_locations_if([[
YYERROR and the label yyerrorlab therefore never appears in user
code. */
if (false)
- goto yyerrorlab;
-
-]b4_locations_if([[
- yyerror_range[0].location = yystack_[yylen - 1].location;]])[
+ goto yyerrorlab;]b4_locations_if([[
+ yyerror_range[0].location = yystack_[yylen - 1].location;]])b4_variant_if([[
+ /* $$ was initialized before running the user action. */
+ yy_destroy_ ("Error: discarding", yylhs);]])[
/* Do not reclaim the symbols of the rule which action triggered
this YYERROR. */
yypop_ (yylen);
yylen = 0;
- yystate = yystack_[0].state;
goto yyerrlab1;
/*-------------------------------------------------------------.
stack_symbol_type error_token;
for (;;)
{
- yyn = yypact_[yystate];
+ yyn = yypact_[yystack_[0].state];
if (yyn != yypact_ninf_)
{
yyn += yyterror_;
yyerror_range[0].location = yystack_[0].location;]])[
yy_destroy_ ("Error: popping", yystack_[0]);
yypop_ ();
- yystate = yystack_[0].state;
YY_STACK_PRINT ();
}
]b4_locations_if([[
YYLLOC_DEFAULT (error_token.location, (yyerror_range - 1), 2);]])[
/* Shift the error token. */
- error_token.state = yystate = yyn;
+ error_token.state = yyn;
yypush_ ("Shifting", error_token);
}
goto yynewstate;
// Generate an error message.
std::string
]b4_parser_class_name[::yysyntax_error_ (]dnl
-b4_error_verbose_if([int yystate, int yytoken],
+b4_error_verbose_if([state_type yystate, int yytoken],
[int, int])[)
{
std::string yyres;]b4_error_verbose_if([[
if (yypact_ninf_ < yyn && yyn <= yylast_)
{
/* Start YYX at -YYN if negative to avoid negative indexes in
- YYCHECK. */
+ YYCHECK. In other words, skip the first -YYN actions for this
+ state because they are default actions. */
int yyxbegin = yyn < 0 ? -yyn : 0;
/* Stay within bounds of both yycheck and yytname. */
char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
yyarg[yycount++] = yytname_[yytoken];
for (int yyx = yyxbegin; yyx < yyxend; ++yyx)
- if (yycheck_[yyx + yyn] == yyx && yyx != yyterror_)
+ if (yycheck_[yyx + yyn] == yyx && yyx != yyterror_
+ && yytable_[yyx + yyn] != yytable_ninf_)
{
if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
{
}
#endif // YYDEBUG
-]b4_lex_symbol_if([], [b4_yytranslate_definition])[
+]b4_lex_symbol_if([], [b4_yytranslate_define])[
]b4_namespace_close[
]b4_epilogue[]dnl
m4_divert_pop(0)
projects / bison.git / blobdiff