mirror of
https://github.com/triqs/dft_tools
synced 2024-10-31 19:23:45 +01:00
60 lines
2.5 KiB
C++
60 lines
2.5 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/>.
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
#ifndef TRIQS_UTILITY_EXPRESSION_TEMPLATE_TOOLS_H
|
||
|
|
#define TRIQS_UTILITY_EXPRESSION_TEMPLATE_TOOLS_H
|
||
|
|
#include <type_traits>
|
||
|
|
#include <complex>
|
||
|
|
namespace triqs { namespace utility {
|
||
|
|
|
||
|
|
namespace tags { struct plus{}; struct minus{}; struct multiplies{}; struct divides{}; }
|
||
|
|
|
||
|
|
// The basic operations put in a template....
|
||
|
|
template<typename Tag> struct operation;
|
||
|
|
template<> struct operation<tags::plus> {
|
||
|
|
template<typename L, typename R> auto operator()(L const & l, R const & r) const -> decltype(l+r) { return l+r;}
|
||
|
|
static const char name = '+';
|
||
|
|
};
|
||
|
|
template<> struct operation<tags::minus> {
|
||
|
|
template<typename L, typename R> auto operator()(L const & l, R const & r) const -> decltype(l-r) { return l-r;}
|
||
|
|
static const char name = '-';
|
||
|
|
};
|
||
|
|
template<> struct operation<tags::multiplies> {
|
||
|
|
template<typename L, typename R> auto operator()(L const & l, R const & r) const -> decltype(l*r) { return l*r;}
|
||
|
|
static const char name = '*';
|
||
|
|
};
|
||
|
|
template<> struct operation<tags::divides> {
|
||
|
|
template<typename L, typename R> auto operator()(L const & l, R const & r) const -> decltype(l/r) { return l/r;}
|
||
|
|
static const char name = '/';
|
||
|
|
};
|
||
|
|
|
||
|
|
// The scalar ...
|
||
|
|
template<typename T> struct is_in_ZRC : std::is_arithmetic<T> {};
|
||
|
|
template<> struct is_in_ZRC<bool> : std::true_type {};
|
||
|
|
template<typename T> struct is_in_ZRC<std::complex<T> > : std::true_type {};
|
||
|
|
|
||
|
|
template<typename A, typename B>
|
||
|
|
struct type_of_mult{
|
||
|
|
typedef decltype ( std::declval<typename std::remove_reference<A>::type>() * std::declval<typename std::remove_reference<B>::type>() ) type;
|
||
|
|
};
|
||
|
|
|
||
|
|
}}//namespace triqs::utility
|
||
|
|
#endif
|