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55 lines
1.3 KiB
C++
55 lines
1.3 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra.
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//
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// Copyright (C) 2015 Benoit Steiner <benoit.steiner.goog@gmail.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla
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// Public License v. 2.0. If a copy of the MPL was not distributed
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// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#ifndef EIGEN_CXX11_TENSOR_TENSOR_META_MACROS_H
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#define EIGEN_CXX11_TENSOR_TENSOR_META_MACROS_H
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/** use this macro in sfinae selection in templated functions
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*
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* template<typename T,
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* typename std::enable_if< isBanana<T>::value , int >::type = 0
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* >
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* void foo(){}
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*
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* becomes =>
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*
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* template<typename TopoType,
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* SFINAE_ENABLE_IF( isBanana<T>::value )
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* >
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* void foo(){}
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*/
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// SFINAE requires variadic templates
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#ifndef __CUDACC__
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#if EIGEN_HAS_VARIADIC_TEMPLATES
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// SFINAE doesn't work for gcc <= 4.7
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#ifdef EIGEN_COMP_GNUC
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#if EIGEN_GNUC_AT_LEAST(4,8)
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#define EIGEN_HAS_SFINAE
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#endif
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#else
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#define EIGEN_HAS_SFINAE
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#endif
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#endif
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#endif
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#define EIGEN_SFINAE_ENABLE_IF( __condition__ ) \
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typename internal::enable_if< ( __condition__ ) , int >::type = 0
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#if EIGEN_HAS_CONSTEXPR
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#define EIGEN_CONSTEXPR constexpr
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#else
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#define EIGEN_CONSTEXPR
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#endif
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#endif
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