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// TR1 type_traits -*- C++ -*-
// Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING. If not, write to the Free
// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// USA.
// As a special exception, you may use this file as part of a free software
// library without restriction. Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License. This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.
/** @file tr1/type_traits
* This is a TR1 C++ Library header.
*/
#ifndef _GLIBCXX_TR1_TYPE_TRAITS
#define _GLIBCXX_TR1_TYPE_TRAITS 1
#pragma GCC system_header
#if defined(_GLIBCXX_INCLUDE_AS_CXX0X)
# error TR1 header cannot be included from C++0x header
#endif
#include <cstddef>
#if defined(_GLIBCXX_INCLUDE_AS_TR1)
# include <tr1_impl/type_traits>
#else
# define _GLIBCXX_INCLUDE_AS_TR1
# define _GLIBCXX_BEGIN_NAMESPACE_TR1 namespace tr1 {
# define _GLIBCXX_END_NAMESPACE_TR1 }
# define _GLIBCXX_TR1 tr1::
# include <tr1_impl/type_traits>
# undef _GLIBCXX_TR1
# undef _GLIBCXX_END_NAMESPACE_TR1
# undef _GLIBCXX_BEGIN_NAMESPACE_TR1
# undef _GLIBCXX_INCLUDE_AS_TR1
#endif
namespace std
{
namespace tr1
{
#define _DEFINE_SPEC_BODY(_Value) \
: public integral_constant<bool, _Value> { };
#define _DEFINE_SPEC_0_HELPER(_Spec, _Value) \
template<> \
struct _Spec \
_DEFINE_SPEC_BODY(_Value)
#define _DEFINE_SPEC(_Order, _Trait, _Type, _Value) \
_DEFINE_SPEC_##_Order##_HELPER(_Trait<_Type>, _Value) \
_DEFINE_SPEC_##_Order##_HELPER(_Trait<_Type const>, _Value) \
_DEFINE_SPEC_##_Order##_HELPER(_Trait<_Type volatile>, _Value) \
_DEFINE_SPEC_##_Order##_HELPER(_Trait<_Type const volatile>, _Value)
template<typename>
struct is_reference
: public false_type { };
template<typename _Tp>
struct is_reference<_Tp&>
: public true_type { };
template<typename _Tp>
struct is_pod
: public integral_constant<bool, __is_pod(_Tp) || is_void<_Tp>::value>
{ };
template<typename _Tp>
struct has_trivial_constructor
: public integral_constant<bool, is_pod<_Tp>::value>
{ };
template<typename _Tp>
struct has_trivial_copy
: public integral_constant<bool, is_pod<_Tp>::value>
{ };
template<typename _Tp>
struct has_trivial_assign
: public integral_constant<bool, is_pod<_Tp>::value>
{ };
template<typename _Tp>
struct has_trivial_destructor
: public integral_constant<bool, is_pod<_Tp>::value>
{ };
template<typename _Tp>
struct has_nothrow_constructor
: public integral_constant<bool, is_pod<_Tp>::value>
{ };
template<typename _Tp>
struct has_nothrow_copy
: public integral_constant<bool, is_pod<_Tp>::value>
{ };
template<typename _Tp>
struct has_nothrow_assign
: public integral_constant<bool, is_pod<_Tp>::value>
{ };
template<typename>
struct is_signed
: public false_type { };
_DEFINE_SPEC(0, is_signed, signed char, true)
_DEFINE_SPEC(0, is_signed, short, true)
_DEFINE_SPEC(0, is_signed, int, true)
_DEFINE_SPEC(0, is_signed, long, true)
_DEFINE_SPEC(0, is_signed, long long, true)
template<typename>
struct is_unsigned
: public false_type { };
_DEFINE_SPEC(0, is_unsigned, unsigned char, true)
_DEFINE_SPEC(0, is_unsigned, unsigned short, true)
_DEFINE_SPEC(0, is_unsigned, unsigned int, true)
_DEFINE_SPEC(0, is_unsigned, unsigned long, true)
_DEFINE_SPEC(0, is_unsigned, unsigned long long, true)
template<typename _Base, typename _Derived>
struct __is_base_of_helper
{
typedef typename remove_cv<_Base>::type _NoCv_Base;
typedef typename remove_cv<_Derived>::type _NoCv_Derived;
static const bool __value = (is_same<_Base, _Derived>::value
|| (__is_base_of(_Base, _Derived)
&& !is_same<_NoCv_Base,
_NoCv_Derived>::value));
};
template<typename _Base, typename _Derived>
struct is_base_of
: public integral_constant<bool,
__is_base_of_helper<_Base, _Derived>::__value>
{ };
template<typename _From, typename _To>
struct __is_convertible_simple
: public __sfinae_types
{
private:
static __one __test(_To);
static __two __test(...);
static _From __makeFrom();
public:
static const bool __value = sizeof(__test(__makeFrom())) == 1;
};
template<typename _Tp>
struct __is_int_or_cref
{
typedef typename remove_reference<_Tp>::type __rr_Tp;
static const bool __value = (is_integral<_Tp>::value
|| (is_integral<__rr_Tp>::value
&& is_const<__rr_Tp>::value
&& !is_volatile<__rr_Tp>::value));
};
template<typename _From, typename _To,
bool = (is_void<_From>::value || is_void<_To>::value
|| is_function<_To>::value || is_array<_To>::value
// This special case is here only to avoid warnings.
|| (is_floating_point<typename
remove_reference<_From>::type>::value
&& __is_int_or_cref<_To>::__value))>
struct __is_convertible_helper
{
// "An imaginary lvalue of type From...".
static const bool __value = (__is_convertible_simple<typename
add_reference<_From>::type, _To>::__value);
};
template<typename _From, typename _To>
struct __is_convertible_helper<_From, _To, true>
{ static const bool __value = (is_void<_To>::value
|| (__is_int_or_cref<_To>::__value
&& !is_void<_From>::value)); };
template<typename _From, typename _To>
struct is_convertible
: public integral_constant<bool,
__is_convertible_helper<_From, _To>::__value>
{ };
/// @brief reference modifications [4.7.2].
template<typename _Tp>
struct remove_reference
{ typedef _Tp type; };
template<typename _Tp>
struct remove_reference<_Tp&>
{ typedef _Tp type; };
// NB: Careful with reference to void.
template<typename _Tp, bool = (is_void<_Tp>::value
|| is_reference<_Tp>::value)>
struct __add_reference_helper
{ typedef _Tp& type; };
template<typename _Tp>
struct __add_reference_helper<_Tp, true>
{ typedef _Tp type; };
template<typename _Tp>
struct add_reference
: public __add_reference_helper<_Tp>
{ };
#undef _DEFINE_SPEC_0_HELPER
#undef _DEFINE_SPEC
#undef _DEFINE_SPEC_BODY
}
}
#endif // _GLIBCXX_TR1_TYPE_TRAITS
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