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// Copyright 2023 The Pigweed Authors
//
// 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
//
// https://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 "pw_polyfill/standard_library/namespace.h"
_PW_POLYFILL_BEGIN_NAMESPACE_STD
template <typename T>
class reference_wrapper {
public:
using type = T;
// This constructor is incomplete / incorrect!
constexpr reference_wrapper(T& reference) : pointer_(&reference) {}
constexpr reference_wrapper(const reference_wrapper&) noexcept = default;
constexpr reference_wrapper& operator=(const reference_wrapper&) noexcept =
default;
constexpr T& get() const noexcept { return *pointer_; }
constexpr operator T&() const noexcept { return *pointer_; }
private:
T* pointer_;
};
_PW_POLYFILL_END_NAMESPACE_STD
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