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