mirror of
https://github.com/triqs/dft_tools
synced 2024-11-01 19:53:45 +01:00
133 lines
4.5 KiB
C++
133 lines
4.5 KiB
C++
/*******************************************************************************
|
|
*
|
|
* TRIQS: a Toolbox for Research in Interacting Quantum Systems
|
|
*
|
|
* Copyright (C) 2011 by O. Parcollet
|
|
*
|
|
* TRIQS 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 of the License, or (at your option) any later
|
|
* version.
|
|
*
|
|
* TRIQS 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
|
|
* TRIQS. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
******************************************************************************/
|
|
#pragma once
|
|
#include <memory>
|
|
#include <functional>
|
|
#include "./macros.hpp"
|
|
|
|
// backward compat. C++11 compilers.
|
|
// new stuff in
|
|
|
|
namespace std {
|
|
namespace c14 {
|
|
|
|
// helpers
|
|
template <bool B, class T, class F> using conditional_t = typename conditional<B, T, F>::type;
|
|
template <class T> using result_of_t = typename result_of<T>::type;
|
|
template <class T> using remove_reference_t = typename remove_reference<T>::type;
|
|
template <class T> using add_const_t = typename add_const<T>::type;
|
|
template <class T> using remove_const_t = typename remove_const<T>::type;
|
|
template <class T> using decay_t = typename decay<T>::type;
|
|
template <bool B, class T = void> using enable_if_t = typename enable_if<B, T>::type;
|
|
|
|
// use simply std::c14::plus<>() ...
|
|
template<typename T = void> struct plus: std::plus<T>{};
|
|
template<> struct plus<void> {
|
|
template<typename T, typename U>
|
|
auto operator()( T&& t, U&& u) const DECL_AND_RETURN(std::forward<T>(t) + std::forward<U>(u));
|
|
};
|
|
|
|
// use simply std::c14::plus<>() ...
|
|
template<typename T = void> struct greater: std::greater<T>{};
|
|
template<> struct greater<void> {
|
|
template<typename T, typename U>
|
|
auto operator()( T&& t, U&& u) const DECL_AND_RETURN(std::forward<T>(t) > std::forward<U>(u));
|
|
};
|
|
|
|
template<typename T = void> struct less: std::less<T>{};
|
|
template<> struct less<void> {
|
|
template<typename T, typename U>
|
|
auto operator()( T&& t, U&& u) const DECL_AND_RETURN(std::forward<T>(t) < std::forward<U>(u));
|
|
};
|
|
|
|
template<typename T, typename... Args>
|
|
std::unique_ptr<T> make_unique(Args&&... args) { return std::unique_ptr<T>(new T(std::forward<Args>(args)...)); }
|
|
|
|
//------------------------------------------------------------------------------------------
|
|
//
|
|
// sequence from C++14 : from gcc lib 4.9
|
|
/// Class template integer_sequence
|
|
// Stores a tuple of indices. Used by tuple and pair, and by bind() to
|
|
// extract the elements in a tuple.
|
|
template<size_t... _Indexes>
|
|
struct _Index_tuple
|
|
{
|
|
typedef _Index_tuple<_Indexes..., sizeof...(_Indexes)> __next;
|
|
};
|
|
|
|
// Builds an _Index_tuple<0, 1, 2, ..., _Num-1>.
|
|
template<size_t _Num>
|
|
struct _Build_index_tuple
|
|
{
|
|
typedef typename _Build_index_tuple<_Num - 1>::__type::__next __type;
|
|
};
|
|
|
|
template<>
|
|
struct _Build_index_tuple<0>
|
|
{
|
|
typedef _Index_tuple<> __type;
|
|
};
|
|
|
|
template<typename _Tp, _Tp... _Idx>
|
|
struct integer_sequence
|
|
{
|
|
typedef _Tp value_type;
|
|
static constexpr size_t size() { return sizeof...(_Idx); }
|
|
};
|
|
|
|
template<typename _Tp, _Tp _Num,
|
|
typename _ISeq = typename _Build_index_tuple<_Num>::__type>
|
|
struct _Make_integer_sequence;
|
|
|
|
template<typename _Tp, _Tp _Num, size_t... _Idx>
|
|
struct _Make_integer_sequence<_Tp, _Num, _Index_tuple<_Idx...>>
|
|
{
|
|
static_assert( _Num >= 0,
|
|
"Cannot make integer sequence of negative length" );
|
|
|
|
typedef integer_sequence<_Tp, static_cast<_Tp>(_Idx)...> __type;
|
|
};
|
|
|
|
/// Alias template make_integer_sequence
|
|
template<typename _Tp, _Tp _Num>
|
|
using make_integer_sequence
|
|
= typename _Make_integer_sequence<_Tp, _Num>::__type;
|
|
|
|
/// Alias template index_sequence
|
|
template<size_t... _Idx>
|
|
using index_sequence = integer_sequence<size_t, _Idx...>;
|
|
|
|
/// Alias template make_index_sequence
|
|
template<size_t _Num>
|
|
using make_index_sequence = make_integer_sequence<size_t, _Num>;
|
|
|
|
/// Alias template index_sequence_for
|
|
template<typename... _Types>
|
|
using index_sequence_for = make_index_sequence<sizeof...(_Types)>;
|
|
//--------------------------------------------------
|
|
|
|
}
|
|
}
|
|
|
|
namespace std14 {
|
|
using namespace std::c14;
|
|
}
|