// Copyright 2020 The Dawn & Tint Authors // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are met: // // 1. Redistributions of source code must retain the above copyright notice, this // list of conditions and the following disclaimer. // // 2. Redistributions in binary form must reproduce the above copyright notice, // this list of conditions and the following disclaimer in the documentation // and/or other materials provided with the distribution. // // 3. Neither the name of the copyright holder nor the names of its // contributors may be used to endorse or promote products derived from // this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. #ifndef SRC_DAWN_COMMON_UNDERLYINGTYPE_H_ #define SRC_DAWN_COMMON_UNDERLYINGTYPE_H_ #include <type_traits> namespace dawn { // UnderlyingType is similar to std::underlying_type_t. It is a passthrough for already // integer types which simplifies getting the underlying primitive type for an arbitrary // template parameter. It includes a specialization for detail::TypedIntegerImpl which yields // the wrapped integer type. namespace detail { template <typename T, typename Enable = void> struct UnderlyingTypeImpl; UnderlyingTypeImpl<I, typename std::enable_if_t<std::is_integral<I>::value>>; UnderlyingTypeImpl<E, typename std::enable_if_t<std::is_enum<E>::value>>; // Forward declare the TypedInteger impl. template <typename Tag, typename T> class TypedIntegerImpl; UnderlyingTypeImpl<TypedIntegerImpl<Tag, I>>; } // namespace detail UnderlyingType; } // namespace dawn #endif // SRC_DAWN_COMMON_UNDERLYINGTYPE_H_