cpplib/include/cpp/lib_scope at master · vslavski/cpplib · GitHub

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/* File: /cpp/lib_scope
 *
 * This file is a part of cpplib project which is distributed under MIT License.
 * See file LICENSE for full license details.
 *
 * Copyright (c) 2020-present Nikita Zuev (V.Slavski!) <[email protected]>
 */
#ifndef CPPLIB__cpp__lib_scope
#define CPPLIB__cpp__lib_scope

#include <utility>

/////////////////////////////////// scope_exit /////////////////////////////////////////////

namespace cpp {

/// @see https://en.cppreference.com/w/cpp/experimental/scope_exit

/// @todo Satisfy all the requirements.

template< class EF >
class scope_exit {
public:
	scope_exit( const scope_exit & ) = delete;
	scope_exit & operator = ( const scope_exit & ) = delete;
	scope_exit & operator = ( scope_exit && ) = delete;

	constexpr explicit scope_exit( EF && fn_ ) noexcept
		: fn{ ::std::move( fn_ ) }
		, active{ true }
		{}

	constexpr scope_exit( scope_exit && other ) noexcept
		: fn{ ::std::move( other.fn ) }
		, active{ ::std::move( other.active ) }
		{}

	constexpr ~scope_exit() noexcept {
		if ( active ) fn();
	}

	constexpr void release() noexcept {
		active = false;
	}
private:
	EF fn;
	bool active;
};

} // namespace cpp

#endif // CPPLIB__cpp__lib_scope