default_delete.hpp

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// SPDX-License-Identifier: BSL-1.0
// SPDX-FileCopyrightText: Copyright (C) 2019 Tobias Hienzsch
 
#ifndef TETL_MEMORY_DEFAULT_DELETE_HPP
#define TETL_MEMORY_DEFAULT_DELETE_HPP
 
#include <etl/_config/all.hpp>
 
#include <etl/_type_traits/is_convertible.hpp>
#include <etl/_type_traits/is_function.hpp>
#include <etl/_type_traits/is_void.hpp>
 
namespace etl {
 
template <typename T>
struct default_delete {
    constexpr default_delete() noexcept = default;
 
    template <typename U>
        requires(is_convertible_v<U*, T*>)
    default_delete(default_delete<U> const& /*unused*/) noexcept
    {
    }
 
    auto operator()(T* ptr) const noexcept -> void
    {
        delete ptr;
    }
 
private:
    static_assert(!is_function_v<T>);
    static_assert(!is_void_v<T>);
    static_assert(sizeof(T));
};
 
template <typename T>
struct default_delete<T[]> {
    constexpr default_delete() noexcept = default;
 
    template <typename U>
        requires(is_convertible_v<U (*)[], T (*)[]>)
    default_delete(default_delete<U[]> const& /*unused*/) noexcept
    {
    }
 
    template <typename U>
        requires(is_convertible_v<U (*)[], T (*)[]>)
    auto operator()(U* ptr) const noexcept -> void
    {
        delete[] ptr;
    }
 
private:
    static_assert(sizeof(T));
    static_assert(not is_void_v<T>);
};
 
} // namespace etl
 
#endif // TETL_MEMORY_DEFAULT_DELETE_HPP