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File type_traits.h

// -*- C++ -*-

// Copyright (C) 2005-2018 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 3, 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.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

/** @file ext/type_traits.h
 *  This file is a GNU extension to the Standard C++ Library.
 */

#ifndef _EXT_TYPE_TRAITS
#define _EXT_TYPE_TRAITS 1

#pragma GCC system_header

#include <bits/c++config.h>
#include <bits/cpp_type_traits.h>

extern "C++" {

namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

// Define a nested type if some predicate holds.
  template<bool, typename>
    struct __enable_if 
    { };

template<typename _Tp>
    struct __enable_if<true, _Tp>
    { typedef _Tp __type; };

// Conditional expression for types. If true, first, if false, second.
  template<bool _Cond, typename _Iftrue, typename _Iffalse>
    struct __conditional_type
    { typedef _Iftrue __type; };

template<typename _Iftrue, typename _Iffalse>
    struct __conditional_type<false, _Iftrue, _Iffalse>
    { typedef _Iffalse __type; };

// Given an integral builtin type, return the corresponding unsigned type.
  template<typename _Tp>
    struct __add_unsigned
    { 
    private:
      typedef __enable_if<std::__is_integer<_Tp>::__value, _Tp> __if_type;
      
    public:
      typedef typename __if_type::__type __type; 
    };

template<>
    struct __add_unsigned<char>
    { typedef unsigned char __type; };

template<>
    struct __add_unsigned<signed char>
    { typedef unsigned char __type; };

template<>
    struct __add_unsigned<short>
    { typedef unsigned short __type; };

template<>
    struct __add_unsigned<int>
    { typedef unsigned int __type; };

template<>
    struct __add_unsigned<long>
    { typedef unsigned long __type; };

template<>
    struct __add_unsigned<long long>
    { typedef unsigned long long __type; };

// Declare but don't define.
  template<>
    struct __add_unsigned<bool>;

template<>
    struct __add_unsigned<wchar_t>;

// Given an integral builtin type, return the corresponding signed type.
  template<typename _Tp>
    struct __remove_unsigned
    { 
    private:
      typedef __enable_if<std::__is_integer<_Tp>::__value, _Tp> __if_type;
      
    public:
      typedef typename __if_type::__type __type; 
    };

template<>
    struct __remove_unsigned<char>
    { typedef signed char __type; };

template<>
    struct __remove_unsigned<unsigned char>
    { typedef signed char __type; };

template<>
    struct __remove_unsigned<unsigned short>
    { typedef short __type; };

template<>
    struct __remove_unsigned<unsigned int>
    { typedef int __type; };

template<>
    struct __remove_unsigned<unsigned long>
    { typedef long __type; };

template<>
    struct __remove_unsigned<unsigned long long>
    { typedef long long __type; };

// Declare but don't define.
  template<>
    struct __remove_unsigned<bool>;

template<>
    struct __remove_unsigned<wchar_t>;

// For use in string and vstring.
  template<typename _Type>
    inline bool
    __is_null_pointer(_Type* __ptr)
    { return __ptr == 0; }

template<typename _Type>
    inline bool
    __is_null_pointer(_Type)
    { return false; }

#if __cplusplus >= 201103L
  inline bool
  __is_null_pointer(std::nullptr_t)
  { return true; }
#endif

// For complex and cmath
  template<typename _Tp, bool = std::__is_integer<_Tp>::__value>
    struct __promote
    { typedef double __type; };

// No nested __type member for non-integer non-floating point types,
  // allows this type to be used for SFINAE to constrain overloads in
  // <cmath> and <complex> to only the intended types.
  template<typename _Tp>
    struct __promote<_Tp, false>
    { };

template<>
    struct __promote<long double>
    { typedef long double __type; };

template<>
    struct __promote<double>
    { typedef double __type; };

template<>
    struct __promote<float>
    { typedef float __type; };

template<typename _Tp, typename _Up,
           typename _Tp2 = typename __promote<_Tp>::__type,
           typename _Up2 = typename __promote<_Up>::__type>
    struct __promote_2
    {
      typedef __typeof__(_Tp2() + _Up2()) __type;
    };

template<typename _Tp, typename _Up, typename _Vp,
           typename _Tp2 = typename __promote<_Tp>::__type,
           typename _Up2 = typename __promote<_Up>::__type,
           typename _Vp2 = typename __promote<_Vp>::__type>
    struct __promote_3
    {
      typedef __typeof__(_Tp2() + _Up2() + _Vp2()) __type;
    };

template<typename _Tp, typename _Up, typename _Vp, typename _Wp,
           typename _Tp2 = typename __promote<_Tp>::__type,
           typename _Up2 = typename __promote<_Up>::__type,
           typename _Vp2 = typename __promote<_Vp>::__type,
           typename _Wp2 = typename __promote<_Wp>::__type>
    struct __promote_4
    {
      typedef __typeof__(_Tp2() + _Up2() + _Vp2() + _Wp2()) __type;
    };

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
} // extern "C++"

#endif

Name	Type	Size	Permission	Last Modified	Actions
.	DIR	-	drwxr-xr-x	2025-08-28 10:58:25
..	DIR	-	drwxr-xr-x	2025-08-28 10:58:25
pb_ds	DIR	-	drwxr-xr-x	2025-08-28 10:58:25
algorithm	text/x-c	18.84 KB	-rw-r--r--	2025-08-26 09:45:00
aligned_buffer.h	text/plain	3.88 KB	-rw-r--r--	2025-08-26 09:45:00
alloc_traits.h	text/plain	5.57 KB	-rw-r--r--	2025-08-26 09:45:00
array_allocator.h	text/x-c	5.26 KB	-rw-r--r--	2025-08-26 09:45:00
atomicity.h	text/x-c	3.43 KB	-rw-r--r--	2025-08-26 09:45:00
bitmap_allocator.h	text/x-c	31.08 KB	-rw-r--r--	2025-08-26 09:45:00
cast.h	text/plain	4.34 KB	-rw-r--r--	2025-08-26 09:45:00
cmath	text/x-c	6.42 KB	-rw-r--r--	2025-08-26 09:45:00
codecvt_specializations.h	text/x-c	15.97 KB	-rw-r--r--	2025-08-26 09:45:00
concurrence.h	text/x-c	7.43 KB	-rw-r--r--	2025-08-26 09:45:00
debug_allocator.h	text/x-c	5.58 KB	-rw-r--r--	2025-08-26 09:45:00
enc_filebuf.h	text/x-c	2.19 KB	-rw-r--r--	2025-08-26 09:45:00
extptr_allocator.h	text/x-c	6.04 KB	-rw-r--r--	2025-08-26 09:45:00
functional	text/x-c	13.96 KB	-rw-r--r--	2025-08-26 09:45:00
hash_map	text/x-c	17.36 KB	-rw-r--r--	2025-08-26 09:45:01
hash_set	text/x-c	16.79 KB	-rw-r--r--	2025-08-26 09:45:01
iterator	text/x-c	3.94 KB	-rw-r--r--	2025-08-26 09:45:00
malloc_allocator.h	text/x-c	4.97 KB	-rw-r--r--	2025-08-26 09:45:00
memory	text/x-c	6.99 KB	-rw-r--r--	2025-08-26 09:45:00
mt_allocator.h	text/x-c	22.96 KB	-rw-r--r--	2025-08-26 09:45:00
new_allocator.h	text/x-c	4.69 KB	-rw-r--r--	2025-08-26 09:45:00
numeric	text/x-c	4.62 KB	-rw-r--r--	2025-08-26 09:45:00
numeric_traits.h	text/x-c	4.47 KB	-rw-r--r--	2025-08-26 09:45:00
pod_char_traits.h	text/x-c	5.43 KB	-rw-r--r--	2025-08-26 09:45:00
pointer.h	text/x-c	19.36 KB	-rw-r--r--	2025-08-26 09:45:00
pool_allocator.h	text/x-c	8.61 KB	-rw-r--r--	2025-08-26 09:45:00
random	text/x-c	108.78 KB	-rw-r--r--	2025-08-26 09:45:00
random.tcc	text/plain	58.83 KB	-rw-r--r--	2025-08-26 09:45:00
rb_tree	text/x-c	3.23 KB	-rw-r--r--	2025-08-26 09:45:00
rc_string_base.h	text/x-c	23.18 KB	-rw-r--r--	2025-08-26 09:45:01
rope	text/x-c	85.58 KB	-rw-r--r--	2025-08-26 09:45:00
ropeimpl.h	text/x-c	47.3 KB	-rw-r--r--	2025-08-26 09:45:00
slist	text/x-c	28.91 KB	-rw-r--r--	2025-08-26 09:45:00
sso_string_base.h	text/plain	15.93 KB	-rw-r--r--	2025-08-26 09:45:01
stdio_filebuf.h	text/x-c	5.54 KB	-rw-r--r--	2025-08-26 09:45:00
stdio_sync_filebuf.h	text/x-c	8.58 KB	-rw-r--r--	2025-08-26 09:45:00
string_conversions.h	text/x-c	3.51 KB	-rw-r--r--	2025-08-26 09:45:00
throw_allocator.h	text/x-c	23.96 KB	-rw-r--r--	2025-08-26 09:45:00
type_traits.h	text/x-c	5.78 KB	-rw-r--r--	2025-08-26 09:45:00
typelist.h	text/x-c	16.09 KB	-rw-r--r--	2025-08-26 09:45:00
vstring.h	text/x-c	107.98 KB	-rw-r--r--	2025-08-26 09:45:01
vstring.tcc	text/x-c	23.06 KB	-rw-r--r--	2025-08-26 09:45:01
vstring_fwd.h	text/x-c	3.15 KB	-rw-r--r--	2025-08-26 09:45:01
vstring_util.h	text/x-c	5.63 KB	-rw-r--r--	2025-08-26 09:45:01

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