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/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <iterator>
#include <type_traits>
namespace android {
namespace internal {
// Never instantiated. Used as a placeholder for template variables.
template <typename T>
struct invalid_type;
// AIDL generates specializations of this for enums.
template <typename EnumType, typename = std::enable_if_t<std::is_enum<EnumType>::value>>
constexpr invalid_type<EnumType> enum_values;
} // namespace internal
// Usage: for (const auto v : enum_range<EnumType>() ) { ... }
template <typename EnumType, typename = std::enable_if_t<std::is_enum<EnumType>::value>>
struct enum_range {
constexpr auto begin() const { return std::begin(internal::enum_values<EnumType>); }
constexpr auto end() const { return std::end(internal::enum_values<EnumType>); }
};
} // namespace android
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