mirror of
https://github.com/triqs/dft_tools
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39 lines
1.4 KiB
C++
39 lines
1.4 KiB
C++
/*******************************************************************************
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*
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* TRIQS: a Toolbox for Research in Interacting Quantum Systems
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*
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* Copyright (C) 2011 by O. Parcollet
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*
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* TRIQS is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* TRIQS is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* TRIQS. If not, see <http://www.gnu.org/licenses/>.
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*
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******************************************************************************/
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#pragma once
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namespace triqs {
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// MPL traits
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template<typename ... T> struct _or;
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template<typename T0, typename ... T> struct _or<T0,T...> : std::integral_constant<bool,T0::value || _or<T...>::value>{};
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template<> struct _or<> : std::false_type{};
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template<typename ... T> struct _and;
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template<typename T0, typename ... T> struct _and<T0,T...> : std::integral_constant<bool,T0::value && _and<T...>::value>{};
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template<> struct _and<> : std::true_type{};
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// helpers
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template<bool B> using bool_constant = std::integral_constant<bool,B>;
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}
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