mirror of
https://github.com/triqs/dft_tools
synced 2024-10-31 19:23:45 +01:00
86 lines
4.4 KiB
C++
86 lines
4.4 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_ARRAYS_EXPRESSION_ARRAY_ALGEBRA_H
|
|
#define TRIQS_ARRAYS_EXPRESSION_ARRAY_ALGEBRA_H
|
|
#include "./tools.hpp"
|
|
namespace triqs { namespace arrays {
|
|
|
|
template<typename Tag, typename L, typename R>
|
|
struct array_expr : TRIQS_MODEL_CONCEPT(ImmutableCuboidArray) {
|
|
typedef typename keeper_type<L>::type L_t;
|
|
typedef typename keeper_type<R>::type R_t;
|
|
static_assert( get_rank<R_t>::value==0 || get_rank<L_t>::value==0 || get_rank<L_t>::value == get_rank<R_t>::value, "rank mismatch in array operations");
|
|
typedef typename std::result_of<operation<Tag>(typename L_t::value_type,typename R_t::value_type)>::type value_type;
|
|
typedef typename std::remove_reference<typename std::result_of<combine_domain(L_t,R_t)>::type>::type domain_type;
|
|
|
|
L_t l; R_t r;
|
|
template<typename LL, typename RR> array_expr(LL && l_, RR && r_) : l(std::forward<LL>(l_)), r(std::forward<RR>(r_)) {}
|
|
|
|
domain_type domain() const { return combine_domain()(l,r); }
|
|
|
|
//template<typename KeyType> value_type operator[](KeyType && key) const { return operation<Tag>()(l[std::forward<KeyType>(key)] , r[std::forward<KeyType>(key)]);}
|
|
template<typename ... Args> value_type operator()(Args && ... args) const { return operation<Tag>()(l(std::forward<Args>(args)...) , r(std::forward<Args>(args)...));}
|
|
friend std::ostream &operator <<(std::ostream &sout, array_expr const &expr){return sout << "("<<expr.l << " "<<operation<Tag>::name << " "<<expr.r<<")" ; }
|
|
};
|
|
|
|
// a special case : the unary operator !
|
|
|
|
template<typename L> struct array_unary_m_expr : TRIQS_MODEL_CONCEPT(ImmutableCuboidArray) {
|
|
typedef typename keeper_type<L>::type L_t;
|
|
typedef typename L_t::value_type value_type;
|
|
typedef typename L_t::domain_type domain_type;
|
|
|
|
L_t l;
|
|
template<typename LL> array_unary_m_expr(LL && l_) : l(std::forward<LL>(l_)) {}
|
|
|
|
domain_type domain() const { return l.domain(); }
|
|
|
|
//template<typename KeyType> value_type operator[](KeyType&& key) const {return -l[key];}
|
|
template<typename ... Args> value_type operator()(Args && ... args) const { return -l(std::forward<Args>(args)...);}
|
|
friend std::ostream &operator <<(std::ostream &sout, array_unary_m_expr const &expr){return sout << '-'<<expr.l; }
|
|
};
|
|
|
|
// Now we can define all the C++ operators ...
|
|
#define DEFINE_OPERATOR(TAG, OP, TRAIT1, TRAIT2) \
|
|
template<typename A1, typename A2>\
|
|
typename std::enable_if<TRAIT1<A1>::value && TRAIT2 <A2>::value, array_expr<tags::TAG, A1,A2>>::type\
|
|
operator OP (A1 const & a1, A2 const & a2) { return array_expr<tags::TAG, A1,A2>(a1,a2);}
|
|
|
|
DEFINE_OPERATOR(plus, +, ImmutableCuboidArray,ImmutableCuboidArray);
|
|
DEFINE_OPERATOR(minus, -, ImmutableCuboidArray,ImmutableCuboidArray);
|
|
DEFINE_OPERATOR(multiplies, *, ImmutableCuboidArray,ImmutableCuboidArray);
|
|
DEFINE_OPERATOR(multiplies, *, is_in_ZRC,ImmutableCuboidArray);
|
|
DEFINE_OPERATOR(multiplies, *, ImmutableCuboidArray,is_in_ZRC);
|
|
DEFINE_OPERATOR(divides, /, ImmutableCuboidArray,ImmutableCuboidArray);
|
|
DEFINE_OPERATOR(divides, /, is_in_ZRC,ImmutableCuboidArray);
|
|
DEFINE_OPERATOR(divides, /, ImmutableCuboidArray,is_in_ZRC);
|
|
#undef DEFINE_OPERATOR
|
|
|
|
// the unary is special
|
|
template<typename A1> typename std::enable_if<ImmutableCuboidArray<A1>::value, array_unary_m_expr<A1>>::type
|
|
operator - (A1 const & a1) { return {a1};}
|
|
|
|
template<typename Expr > array<typename Expr::value_type, Expr::domain_type::rank>
|
|
make_array( Expr const & e) { return array<typename Expr::value_type, Expr::domain_type::rank>(e);}
|
|
|
|
}}//namespace triqs::arrays
|
|
#endif
|