}dnl
])
+# b4_symbol_value_template(VAL, [TYPE])
+# -------------------------------------
+# Same as b4_symbol_value, but used in a template method.
+m4_copy([b4_symbol_value], [b4_symbol_value_template])
+
# How the semantic value is extracted when using variants.
b4_variant_if([
# b4_symbol_value(VAL, [TYPE])
[m4_ifval([$2],
[$1.as<$2>()],
[$1])])
+
+ # b4_symbol_value_template(VAL, [TYPE])
+ # -------------------------------------
+ # Same as b4_symbol_value, but used in a template method.
+ m4_define([b4_symbol_value_template],
+ [m4_ifval([$2],
+ [$1.template as<$2>()],
+ [$1])])
]) # b4_variant_if
# b4_assert_if([IF-ASSERTIONS-ARE-USED], [IF-NOT])
-# ----------------------------------------------------
+# ------------------------------------------------
m4_define([b4_assert_if],
[b4_percent_define_ifdef([[assert]], [$1], [$2])])
[b4_rhs_data([$1], [$2]).location])
+# b4_symbol(NUM, FIELD)
+# ---------------------
+# Recover a FIELD about symbol #NUM. Thanks to m4_indir, fails if
+# undefined.
+m4_define([b4_symbol],
+[m4_indir([b4_symbol($1, $2)])])
+
+
+# b4_symbol_if(NUM, FIELD, IF-TRUE, IF-FALSE)
+# -------------------------------------------
+# If FIELD about symbol #NUM is 1 expand IF-TRUE, if is 0, expand IF-FALSE.
+# Otherwise an error.
+m4_define([b4_symbol_if],
+[m4_case(b4_symbol([$1], [$2]),
+ [1], [$3],
+ [0], [$4],
+ [m4_fatal([$0: field $2 of $1 is not a Boolean:] b4_symbol([$1], [$2]))])])
+
+
# b4_symbol_actions(FILENAME, LINENO,
# SYMBOL-TAG, SYMBOL-NUM,
# SYMBOL-ACTION, SYMBOL-TYPENAME)
# Same as in C, but using references instead of pointers.
m4_define([b4_symbol_actions],
[m4_pushdef([b4_dollar_dollar],
- [b4_symbol_value([yysym.value], [$6])])dnl
+ [b4_symbol_value_template([yysym.value], [$6])])dnl
m4_pushdef([b4_at_dollar], [yysym.location])dnl
case $4: // $3
b4_syncline([$2], [$1])
])
-# b4_symbol_action_(SYMBOL-TAG, SYMBOL-NUM, SYMBOL-TYPENAME)
-# ----------------------------------------------------------
-# Invoke b4_dollar_dollar(SYMBOL_TYPENAME) for each symbol.
-m4_define([b4_symbol_action_],
-[m4_ifval($3,
-[ case $2: // $1
- b4_dollar_dollar($@);
+# b4_symbol_case_(SYMBOL-NUM)
+# ---------------------------
+# Issue a "case NUM" for SYMBOL-NUM.
+m4_define([b4_symbol_case_],
+[ case b4_symbol([$1], [number]): // b4_symbol([$1], [tag])
+])
+
+
+# b4_type_action_(NUMS)
+# ---------------------
+# Run actions for the symbol NUMS that all have the same type-name.
+# Skip NUMS that have no type-name.
+m4_define([b4_type_action_],
+[b4_symbol_if([$1], [has_type_name],
+[m4_map([b4_symbol_case_], [$@])[]dnl
+ b4_dollar_dollar([b4_symbol([$1], [number])],
+ [b4_symbol([$1], [tag])],
+ [b4_symbol([$1], [type_name])]);
break;
+
])])
+# b4_symbol_constructor_declaration_(SYMBOL-NUMBERS)
+# ----------------------------------------------------
+# 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_],
+[ template <token_type>
+ static inline symbol_type
+ make_symbol (b4_symbol_if([$1], [has_type_name],
+ [const b4_symbol([$1], [type_name])& v, ])dnl
+const location_type& l);
+
+])
+
+# b4_symbol_constructor_declarations
+# ----------------------------------
+# Declare the overloaded versions of make_symbol for all the value types.
+# Use at class-level.
+m4_define([b4_symbol_constructor_declarations],
+[b4_variant_if([
+ // Declaration of make_symbol for each value type.
+m4_map([b4_symbol_constructor_declaration_], m4_defn([b4_type_names]))])])
+
+
+
+# b4_symbol_constructor_specialization_(SYMBOL-NUMBER)
+# ----------------------------------------------------
+# Declare the specialization of make_symbol for this each SYMBOL-NUMBER.
+# Specializations cannot be declared at class-level, this must be done
+# at namespace-level.
+m4_define([b4_symbol_constructor_specialization_],
+[b4_symbol_if([$1], [is_token], [b4_symbol_if([$1], [tag_is_id],
+[ template <>
+ inline
+ b4_parser_class_name::symbol_type
+ b4_parser_class_name::make_symbol <b4_parser_class_name::token::b4_symbol([$1], [tag])> (dnl
+b4_symbol_if([$1], [has_type_name],
+ [const b4_symbol([$1], [type_name])& v, ])dnl
+const b4_parser_class_name::location_type& l);
+])])])
+
+# b4_symbol_constructor_specializations
+# -------------------------------------
+# Declare specializations of make_symbol.
+m4_define([b4_symbol_constructor_specializations],
+[b4_variant_if([
+ // Specializations of make_symbol for each symbol type.
+m4_map([b4_symbol_constructor_specialization_],
+ m4_defn([b4_symbol_numbers]))])dnl
+])
+
+
+
+# b4_symbol_constructor_definition_(SYMBOL-NUMBER)
+# ------------------------------------------------
+# Define make_symbol for this SYMBOL-NUMBER.
+m4_define([b4_symbol_constructor_definition_],
+[b4_symbol_if([$1], [is_token], [b4_symbol_if([$1], [tag_is_id],
+[ template <>
+ b4_parser_class_name::symbol_type
+ b4_parser_class_name::make_symbol <b4_parser_class_name::token::b4_symbol([$1], [tag])> (dnl
+b4_symbol_if([$1], [has_type_name],
+ [const b4_symbol([$1], [type_name])& v, ])dnl
+const location_type& l)
+ {
+ return symbol_type (yytranslate_ (token::b4_symbol([$1], [tag])),dnl
+ b4_symbol_if([$1], [has_type_name], [v, ])l);
+ }
+
+])])])
+
+
+# b4_symbol_constructor_declarations
+# ----------------------------------
+# 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.
+m4_map([b4_symbol_constructor_definition_], m4_defn([b4_symbol_numbers]))])])
+
+
# b4_symbol_variant(YYTYPE, YYVAL, ACTION, [ARGS])
# ------------------------------------------------
# Run some ACTION ("build", or "destroy") on YYVAL of symbol type
[$2.$3<$][3>(m4_shift3($@))])dnl
switch ($1)
{
-m4_map([b4_symbol_action_], m4_defn([b4_type_names]))
- default:
- break;
+m4_map([b4_type_action_], m4_defn([b4_type_names]))[]dnl
+ default:
+ break;
}
m4_popdef([b4_dollar_dollar])dnl
])
dummy[]_b4_char_sizeof_counter])
-# b4_char_sizeof(SYMBOL-TAG, SYMBOL-NUM, SYMBOL-TYPENAME)
-# -------------------------------------------------------
+# b4_char_sizeof(SYMBOL-NUM)
+# --------------------------
# To be mapped on the list of type names to produce:
#
# char dummy1[sizeof(type_name_1)];
# for defined type names.
# $3 is doubly-quoted, do not quote it again.
m4_define([b4_char_sizeof],
-[m4_ifval($3,
+[m4_ifval(b4_symbol([$1], [type_name]),
[
- char _b4_char_sizeof_dummy@{sizeof($3)@}; // $1])dnl
+ char _b4_char_sizeof_dummy@{sizeof([b4_symbol([$1], [type_name])])@}; // b4_symbol([$1], [tag])])dnl
])
{]b4_assert_if([
/// Whether something is contained.
bool built;
-
- /// Initially uninitialized.
- variant ()
- : built(false)
- {}])[
+])[
+ /// Empty construction.
+ inline
+ variant ()]b4_assert_if([
+ : built(false)])[
+ {}
/// Instantiate a \a T in here.
template <typename T>
return *new (buffer) T;
}
+ /// Instantiate a \a T in here from \a t.
+ template <typename T>
+ inline T&
+ build(const T& t)
+ {]b4_assert_if([
+ assert(!built);
+ built = true;])[
+ return *new (buffer) T(t);
+ }
+
+ /// Construct and fill.
+ template <typename T>
+ inline
+ variant (const T& t)]b4_assert_if([
+ : built(true)])[
+ {
+ new (buffer) T(t);
+ }
+
/// Accessor to a built \a T.
template <typename T>
inline T&
]b4_variant_if(
[ /// An auxiliary type to compute the largest semantic type.
union union_type
- {]m4_map([b4_char_sizeof], m4_defn([b4_type_names]))[
+ {]m4_map([b4_char_sizeof], m4_defn([b4_symbol_numbers]))[
};
/// Symbol semantic values.
#endif
/// Convert a scanner token number \a t to a symbol number.
- token_number_type yytranslate_ (int t);
+ static inline token_number_type yytranslate_ (int t);
/// A complete symbol, with its type.
+ template <typename Exact>
struct symbol_base_type
{
/// Default constructor.
inline symbol_base_type ();
/// Constructor.
+ inline symbol_base_type (const location_type& l);
inline symbol_base_type (const semantic_type& v, const location_type& l);
+ /// Return this with its exact type.
+ const Exact& self () const;
+ Exact& self ();
+
/// Return the type of this symbol.
- virtual int type_get () const = 0;
+ int type_get () const;
/// The semantic value.
semantic_type value;
/// \brief Display a symbol type, value and location.
/// \param yyo The output stream.
/// \param yysym The symbol.
- void yy_print_ (std::ostream& yyo, const symbol_base_type& yysym) const;
+ template <typename Exact>
+ void yy_print_ (std::ostream& yyo,
+ const symbol_base_type<Exact>& 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.
- inline void yy_destroy_ (const char* yymsg, symbol_base_type& yysym) const;
+ template <typename Exact>
+ inline void yy_destroy_ (const char* yymsg,
+ symbol_base_type<Exact>& yysym) const;
+ public:
/// Element of the stack: a state and its attributes.
- struct symbol_type : symbol_base_type
+ struct symbol_type : symbol_base_type<symbol_type>
{
+ /// The parent class.
+ typedef symbol_base_type<symbol_type> super_type;
+
/// Default constructor.
inline symbol_type ();
inline symbol_type (int t,
const semantic_type& v, const location_type& l);
+ inline symbol_type (int t,
+ const location_type& l);
+
/// The symbol type.
int type;
/// Return the type corresponding to this state.
- virtual inline int type_get () const;
+ inline int type_get_ () const;
};
+]b4_symbol_constructor_declarations[
+
+ private:
/// Element of the stack: a state and its attributes.
- struct stack_symbol_type : symbol_base_type
+ struct stack_symbol_type : symbol_base_type<stack_symbol_type>
{
+ /// The parent class.
+ typedef symbol_base_type<stack_symbol_type> super_type;
+
/// Default constructor.
inline stack_symbol_type ();
state_type state;
/// Return the type corresponding to this state.
- virtual inline int type_get () const;
+ inline int type_get_ () const;
};
/// Stack type.
inline void yypop_ (unsigned int n = 1);
/* Constants. */
- static const int yyeof_;
- /* LAST_ -- Last index in TABLE_. */
- static const int yylast_;
- static const int yynnts_;
- static const int yyempty_;
- static const int yyfinal_;
- static const int yyterror_;
- static const int yyerrcode_;
- static const int yyntokens_;
- static const unsigned int yyuser_token_number_max_;
- static const token_number_type yyundef_token_;
+ enum
+ {
+ yyeof_ = 0,
+ yylast_ = ]b4_last[, //< Last index in yytable_.
+ yynnts_ = ]b4_nterms_number[, //< Number of nonterminal symbols.
+ yyempty_ = -2,
+ yyfinal_ = ]b4_final_state_number[, //< Termination state number.
+ yyterror_ = 1,
+ yyerrcode_ = 256,
+ yyntokens_ = ]b4_tokens_number[, //< Number of tokens.
+ };
+
]b4_parse_param_vars[
};
-
+]b4_symbol_constructor_specializations[
]b4_namespace_close[
]b4_percent_define_flag_if([[global_tokens_and_yystype]],
`---------------*/
// symbol_base_type.
- ]b4_parser_class_name[::symbol_base_type::symbol_base_type ()
+ template <typename Exact>
+ ]b4_parser_class_name[::symbol_base_type<Exact>::symbol_base_type ()
: value()
, location()
{
}
- ]b4_parser_class_name[::symbol_base_type::symbol_base_type (const semantic_type& v, const location_type& l)
+ template <typename Exact>
+ ]b4_parser_class_name[::symbol_base_type<Exact>::symbol_base_type (const location_type& l)
+ : value()
+ , location(l)
+ {
+ }
+ template <typename Exact>
+ ]b4_parser_class_name[::symbol_base_type<Exact>::symbol_base_type (const semantic_type& v, const location_type& l)
: value(v)
, location(l)
{
}
+ template <typename Exact>
+ const Exact&
+ ]b4_parser_class_name[::symbol_base_type<Exact>::self () const
+ {
+ return static_cast<const Exact&>(*this);
+ }
+
+ template <typename Exact>
+ Exact&
+ ]b4_parser_class_name[::symbol_base_type<Exact>::self ()
+ {
+ return static_cast<Exact&>(*this);
+ }
+
+ template <typename Exact>
+ int
+ ]b4_parser_class_name[::symbol_base_type<Exact>::type_get () const
+ {
+ return self ().type_get_ ();
+ }
+
// symbol_type.
]b4_parser_class_name[::symbol_type::symbol_type ()
- : type()
- , symbol_base_type()
+ : super_type ()
+ , type ()
+ {
+ }
+
+ ]b4_parser_class_name[::symbol_type::symbol_type (int t,
+ const location_type& l)
+ : super_type (l)
+ , type (t)
{
}
]b4_parser_class_name[::symbol_type::symbol_type (int t,
const semantic_type& v, const location_type& l)
- : type(t)
- , symbol_base_type(v, l)
+ : super_type (v, l)
+ , type (t)
{
}
int
- ]b4_parser_class_name[::symbol_type::type_get () const
+ ]b4_parser_class_name[::symbol_type::type_get_ () const
{
return type;
}
+]b4_symbol_constructor_definitions[
+
// stack_symbol_type.
]b4_parser_class_name[::stack_symbol_type::stack_symbol_type ()
- : state()
- , symbol_base_type()
+ : super_type ()
+ , state ()
{
}
]b4_parser_class_name[::stack_symbol_type::stack_symbol_type (state_type s,
const semantic_type& v, const location_type& l)
- : state(s)
- , symbol_base_type(v, l)
+ : super_type (v, l)
+ , state (s)
{
}
int
- ]b4_parser_class_name[::stack_symbol_type::type_get () const
+ ]b4_parser_class_name[::stack_symbol_type::type_get_ () const
{
return yystos_[state];
}
+ template <typename Exact>
void
- ]b4_parser_class_name[::yy_destroy_ (const char* yymsg, symbol_base_type& yysym) const
+ ]b4_parser_class_name[::yy_destroy_ (const char* yymsg,
+ symbol_base_type<Exact>& yysym) const
{
int yytype = yysym.type_get ();
YYUSE (yymsg);
// User destructor.
switch (yytype)
{
- ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[
+]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[
default:
break;
}]b4_variant_if([
// Type destructor.
- b4_symbol_variant([[yytype]], [[yysym.value]], [[destroy]])])[
+ b4_symbol_variant([[yytype]], [[yysym.value]], [[template destroy]])])[
}
#if YYDEBUG
+ template <typename Exact>
void
- ]b4_parser_class_name[::yy_print_ (std::ostream& yyo, const symbol_base_type& yysym) const
+ ]b4_parser_class_name[::yy_print_ (std::ostream& yyo,
+ const symbol_base_type<Exact>& yysym) const
{
int yytype = yysym.type_get ();
yyo << (yytype < yyntokens_ ? "token" : "nterm")
<< yysym.location << ": ";
switch (yytype)
{
- ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
-[ default:
+]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))[
+ default:
break;
}
yyo << ')';
m4_ifdef([b4_lex_param], [, ]b4_lex_param))[;
}
-
/* Convert token to internal form. */
if (yychar <= yyeof_)
{
YY_REDUCE_PRINT (yyn);
switch (yyn)
{
- ]b4_user_actions[
+]b4_user_actions[
default:
break;
}
const token_number_type
translate_table[] =
{
- ]b4_translate[
+]b4_translate[
};
- if ((unsigned int) t <= yyuser_token_number_max_)
+ 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<unsigned int> (t) <= user_token_number_max_)
return translate_table[t];
else
- return yyundef_token_;
+ return undef_token_;
}
- const int ]b4_parser_class_name[::yyeof_ = 0;
- const int ]b4_parser_class_name[::yylast_ = ]b4_last[;
- const int ]b4_parser_class_name[::yynnts_ = ]b4_nterms_number[;
- const int ]b4_parser_class_name[::yyempty_ = -2;
- const int ]b4_parser_class_name[::yyfinal_ = ]b4_final_state_number[;
- const int ]b4_parser_class_name[::yyterror_ = 1;
- const int ]b4_parser_class_name[::yyerrcode_ = 256;
- const int ]b4_parser_class_name[::yyntokens_ = ]b4_tokens_number[;
-
- const unsigned int ]b4_parser_class_name[::yyuser_token_number_max_ = ]b4_user_token_number_max[;
- const ]b4_parser_class_name[::token_number_type ]b4_parser_class_name[::yyundef_token_ = ]b4_undef_token_number[;
-
]b4_namespace_close[
]b4_epilogue[]dnl
projects / bison.git / blobdiff