1 /* 2 * Copyright 2014 Google Inc. All rights reserved. 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 17 #ifndef FRUIT_BINDING_DEPS_DEFN_H 18 #define FRUIT_BINDING_DEPS_DEFN_H 19 20 #include <fruit/impl/component_storage/binding_deps.h> 21 22 namespace fruit { 23 namespace impl { 24 25 template <typename L> 26 struct GetBindingDepsHelper; 27 28 template <typename... Ts> 29 struct GetBindingDepsHelper<fruit::impl::meta::Vector<fruit::impl::meta::Type<Ts>...>> { 30 inline const BindingDeps* operator()() { 31 static const TypeId types[] = {getTypeId<Ts>()..., TypeId{nullptr}}; // LCOV_EXCL_BR_LINE 32 static const BindingDeps deps = {types, sizeof...(Ts)}; 33 return &deps; 34 } 35 }; 36 37 // We specialize the "no Ts" case to avoid declaring types[] as an array of length 0. 38 template <> 39 struct GetBindingDepsHelper<fruit::impl::meta::Vector<>> { 40 inline const BindingDeps* operator()() { 41 static const TypeId types[] = {TypeId{nullptr}}; 42 static const BindingDeps deps = {types, 0}; 43 return &deps; 44 } 45 }; 46 47 template <typename Deps> 48 inline const BindingDeps* getBindingDeps() { 49 return GetBindingDepsHelper<Deps>()(); 50 } 51 52 } // namespace impl 53 } // namespace fruit 54 55 #endif // FRUIT_BINDING_DEPS_DEFN_H 56