# C++ skeleton for Bison
-# Copyright (C) 2002-2012 Free Software Foundation, Inc.
+# Copyright (C) 2002-2013 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
m4_pushdef([b4_copyright_years],
- [2002-2012])
+ [2002-2013])
m4_define([b4_parser_class_name],
[b4_percent_define_get([[parser_class_name]])])
m4_define([b4_shared_declarations],
[b4_percent_code_get([[requires]])[
]b4_parse_assert_if([# include <cassert>])[
-# include <deque>
+# include <vector>
# include <iostream>
# include <stdexcept>
# include <string>]b4_defines_if([[
static const ]b4_int_type(b4_table_ninf, b4_table_ninf)[ yytable_ninf_;
/// Convert a scanner token number \a t to a symbol number.
- static inline token_number_type yytranslate_ (]b4_token_ctor_if([token_type], [int])[ t);
+ static token_number_type yytranslate_ (]b4_token_ctor_if([token_type], [int])[ t);
// Tables.
]b4_parser_tables_declare[]b4_error_verbose_if([
/// \brief Display a symbol type, value and location.
/// \param yyo The output stream.
/// \param yysym The symbol.
- template <typename Exact>
- void yy_print_ (std::ostream& yyo,
- const symbol_base_type<Exact>& yysym) const;
+ template <typename Base>
+ void yy_print_ (std::ostream& yyo, const basic_symbol<Base>& yysym) const;
#endif
/// \brief Reclaim the memory associated to a symbol.
/// \param yymsg Why this token is reclaimed.
/// If null, print nothing.
/// \param s The symbol.
- template <typename Exact>
- inline void yy_destroy_ (const char* yymsg,
- symbol_base_type<Exact>& yysym) const;
+ template <typename Base>
+ void yy_destroy_ (const char* yymsg, basic_symbol<Base>& yysym) const;
- /// Element of the stack: a state and its attributes.
- struct stack_symbol_type : symbol_base_type<stack_symbol_type>
+ private:
+ /// Type access provider for state based symbols.
+ struct by_state
{
- /// The parent class.
- typedef symbol_base_type<stack_symbol_type> super_type;
-
/// Default constructor.
- inline stack_symbol_type ();
+ by_state ();
/// Constructor.
- inline stack_symbol_type (]b4_join([state_type s],
- [const semantic_type& v],
- b4_locations_if([const location_type& l]))[);
+ by_state (state_type s);
+
+ /// Copy constructor.
+ by_state (const by_state& other);
+
+ void move (by_state& that);
/// The state.
state_type state;
/// The type (corresponding to \a state).
- inline int type_get_ () const;
+ /// -1 when empty.
+ int type_get () const;
+
+ /// The type used to store the symbol type.
+ typedef state_type value_type;
+ };
+
+ /// "Internal" symbol: element of the stack.
+ struct stack_symbol_type : basic_symbol<by_state>
+ {
+ /// Superclass.
+ typedef basic_symbol<by_state> super_type;
+ /// Construct an empty symbol.
+ stack_symbol_type ();
+ /// Steal the contents from \a sym to build this.
+ stack_symbol_type (state_type s, symbol_type& sym);
+ /// Assignment, needed by push_back.
+ stack_symbol_type& operator= (const stack_symbol_type& that);
};
/// Stack type.
/// if null, no trace is output.
/// \param s the symbol
/// \warning the contents of \a s.value is stolen.
- inline void yypush_ (const char* m, stack_symbol_type& s);
+ void yypush_ (const char* m, stack_symbol_type& s);
/// Push a new look ahead token on the state on the stack.
/// \param m a debug message to display
/// \param s the state
/// \param sym the symbol (for its value and location).
/// \warning the contents of \a s.value is stolen.
- inline void yypush_ (const char* m, state_type s, symbol_type& sym);
+ void yypush_ (const char* m, state_type s, symbol_type& sym);
/// Pop \a n symbols the three stacks.
- inline void yypop_ (unsigned int n = 1);
+ void yypop_ (unsigned int n = 1);
// Constants.
enum
]m4_ifset([b4_parse_param], [ ], [ :])[yydebug_ (false),
yycdebug_ (&std::cerr)]m4_ifset([b4_parse_param], [,])[
#endif]b4_parse_param_cons[
- {
- }
+ {}
]b4_parser_class_name::~b4_parser_class_name[ ()
- {
- }
+ {}
/*---------------.
]b4_token_ctor_if([], [b4_public_types_define])[
- // stack_symbol_type.
- ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type ()
- : super_type ()
- , state ()
+ // by_state.
+ inline
+ ]b4_parser_class_name[::by_state::by_state ()
+ : state (-1)
+ {}
+
+ inline
+ ]b4_parser_class_name[::by_state::by_state (const by_state& other)
+ : state (other.state)
+ {}
+
+ inline
+ void
+ ]b4_parser_class_name[::by_state::move (by_state& that)
{
+ state = that.state;
+ that.state = -1;
}
- ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type (]b4_join(
- [state_type s],
- [const semantic_type& v],
- b4_locations_if([const location_type& l]))[)
- : super_type (v]b4_locations_if([, l])[)
- , state (s)
+ inline
+ ]b4_parser_class_name[::by_state::by_state (state_type s)
+ : state (s)
+ {}
+
+ inline
+ int
+ ]b4_parser_class_name[::by_state::type_get () const
{
+ return state == -1 ? -1 : yystos_[state];
}
- int
- ]b4_parser_class_name[::stack_symbol_type::type_get_ () const
+ inline
+ ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type ()
+ {}
+
+
+ inline
+ ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type (state_type s, symbol_type& that)
+ : super_type (s]b4_locations_if([, that.location])[)
+ {
+ ]b4_variant_if([b4_symbol_variant([that.type_get ()],
+ [value], [move], [that.value])],
+ [[value = that.value;]])[
+ // that is emptied.
+ that.type = -1;
+ }
+
+ inline
+ ]b4_parser_class_name[::stack_symbol_type&
+ ]b4_parser_class_name[::stack_symbol_type::operator= (const stack_symbol_type& that)
{
- return yystos_[state];
+ state = that.state;
+ ]b4_variant_if([b4_symbol_variant([that.type_get ()],
+ [value], [copy], [that.value])],
+ [[value = that.value;]])[]b4_locations_if([
+ location = that.location;])[
+ return *this;
}
- template <typename Exact>
+ template <typename Base>
+ inline
void
- ]b4_parser_class_name[::yy_destroy_ (const char* yymsg,
- symbol_base_type<Exact>& yysym) const
+ ]b4_parser_class_name[::yy_destroy_ (const char* yymsg, basic_symbol<Base>& yysym) const
{
if (yymsg)
- YY_SYMBOL_PRINT (yymsg, yysym);
+ YY_SYMBOL_PRINT (yymsg, yysym);]b4_variant_if([], [
// User destructor.
int yytype = yysym.type_get ();
]b4_symbol_foreach([b4_symbol_destructor])dnl
[ default:
break;
- }]b4_variant_if([
-
- // Type destructor.
- b4_symbol_variant([[yytype]], [[yysym.value]], [[template destroy]])])[
+ }])[
}
#if ]b4_api_PREFIX[DEBUG
- template <typename Exact>
+ template <typename Base>
void
]b4_parser_class_name[::yy_print_ (std::ostream& yyo,
- const symbol_base_type<Exact>& yysym) const
+ const basic_symbol<Base>& yysym) const
{
std::ostream& yyoutput = yyo;
YYUSE (yyoutput);
}
#endif
+ inline
void
- ]b4_parser_class_name[::yypush_ (const char* m, state_type s,
- symbol_type& sym)
+ ]b4_parser_class_name[::yypush_ (const char* m, state_type s, symbol_type& sym)
{
- if (m)
- YY_SYMBOL_PRINT (m, sym);
-]b4_variant_if(
-[[ yystack_.push (stack_symbol_type (]b4_join(
- [s],
- [semantic_type()],
- b4_locations_if([sym.location]))[));
- ]b4_symbol_variant([[yystos_[s]]], [[yystack_[0].value]],
- [build], [sym.value])],
-[[ yystack_.push (stack_symbol_type (]b4_join(
- [s],
- [sym.value],
- b4_locations_if([sym.location]))[));]])[
+ stack_symbol_type t (s, sym);
+ yypush_ (m, t);
}
+ inline
void
]b4_parser_class_name[::yypush_ (const char* m, stack_symbol_type& s)
{
if (m)
YY_SYMBOL_PRINT (m, s);
-]b4_variant_if(
-[[ yystack_.push (stack_symbol_type (]b4_join(
- [s.state],
- [semantic_type()],
- b4_locations_if([s.location]))[));
- ]b4_symbol_variant([[yystos_[s.state]]], [[yystack_[0].value]],
- [build], [s.value])],
-[ yystack_.push (s);])[
+ yystack_.push (s);
}
+ inline
void
]b4_parser_class_name[::yypop_ (unsigned int n)
{
YYCDEBUG << "Reading a token: ";
try
{]b4_token_ctor_if([[
- symbol_type yylookahead = ]b4_lex[;
+ symbol_type yylookahead (]b4_lex[);
yyla.move (yylookahead);]], [[
yyla.type = yytranslate_ (]b4_lex[);]])[
}
YYERROR;
}
YY_SYMBOL_PRINT ("-> $$ =", yylhs);
-]b4_variant_if([[
- // Destroy the rhs symbols.
- for (int i = 0; i < yylen; ++i)
- // Destroy a variant whose value may have been swapped with
- // yylhs.value (for instance if the action was "std::swap($$,
- // $1)"). The value of yylhs.value (hence possibly one of these
- // rhs symbols) depends on the default construction for this
- // type. In the case of pointers for instance, no
- // initialization is done, so the value is junk. Therefore do
- // not try to report the value of symbols about to be destroyed
- // in the debug trace, it's possibly junk. Hence yymsg = 0.
- // Besides, that keeps exactly the same traces as with the other
- // Bison skeletons.
- yy_destroy_ (YY_NULL, yystack_[i]);]])[
-
yypop_ (yylen);
yylen = 0;
YY_STACK_PRINT ();
goto yyerrorlab;]b4_locations_if([[
yyerror_range[1].location = yystack_[yylen - 1].location;]])b4_variant_if([[
/* $$ was initialized before running the user action. */
- yy_destroy_ ("Error: discarding", yylhs);]])[
+ YY_SYMBOL_PRINT ("Error: discarding", yylhs);
+ yylhs.~stack_symbol_type();]])[
/* Do not reclaim the symbols of the rule whose action triggered
this YYERROR. */
yypop_ (yylen);
projects / bison.git / blobdiff