1 /* 2 * Copyright 2019 by its authors. See AUTHORS. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 #ifndef EOLIAN_CXX_GENERATOR_HH 17 #define EOLIAN_CXX_GENERATOR_HH 18 19 #include <type_traits> 20 21 // EXPERIMENTAL 22 //#define USE_EOCXX_INHERIT_ONLY 23 //#define USE_EOCXX_MANUAL_OVERRIDES 24 25 namespace efl { namespace eolian { namespace grammar { 26 27 template <typename T, typename Enable = void> 28 struct is_generator : std::false_type {}; 29 template <typename T, typename Enable = void> 30 struct is_eager_generator : std::false_type {}; 31 32 template <typename T> 33 struct is_generator<T&> : is_generator<T> {}; 34 template <typename T> 35 struct is_eager_generator<T&> : is_eager_generator<T> {}; 36 template <typename T> 37 struct is_generator<T const&> : is_generator<T> {}; 38 template <typename T> 39 struct is_eager_generator<T const&> : is_eager_generator<T> {}; 40 template <typename T> 41 struct is_generator<T const> : is_generator<T> {}; 42 template <typename T> 43 struct is_eager_generator<T const> : is_eager_generator<T> {}; 44 template <typename T> 45 struct is_generator<T volatile> : is_generator<T> {}; 46 template <typename T> 47 struct is_eager_generator<T volatile> : is_eager_generator<T> {}; 48 template <typename T> 49 struct is_generator<T volatile&> : is_generator<T> {}; 50 template <typename T> 51 struct is_eager_generator<T volatile&> : is_eager_generator<T> {}; 52 template <typename T> 53 struct is_generator<T volatile const> : is_generator<T> {}; 54 template <typename T> 55 struct is_eager_generator<T volatile const> : is_eager_generator<T> {}; 56 template <typename T> 57 struct is_generator<T volatile const&> : is_generator<T> {}; 58 template <typename T> 59 struct is_eager_generator<T volatile const&> : is_eager_generator<T> {}; 60 // template <typename T> 61 // struct is_generator<T> : is_eager_generator<T> {}; 62 63 template <typename G, typename Enable = typename std::enable_if<is_eager_generator<G>::value>::type> 64 G as_generator(G g) { return g; } 65 66 67 } } } 68 69 #endif 70