ClickHouse/libs/libcommon/include/ext/scope_guard.h
2017-06-06 20:18:32 +03:00

27 lines
656 B
C++

#pragma once
#include <utility>
namespace ext
{
template <class F> class scope_guard {
const F function;
public:
constexpr scope_guard(const F & function) : function{function} {}
constexpr scope_guard(F && function) : function{std::move(function)} {}
~scope_guard() { function(); }
};
template <class F>
inline scope_guard<F> make_scope_guard(F && function) { return std::forward<F>(function); }
}
#define SCOPE_EXIT_CONCAT(n, ...) \
const auto scope_exit##n = ext::make_scope_guard([&] { __VA_ARGS__; })
#define SCOPE_EXIT_FWD(n, ...) SCOPE_EXIT_CONCAT(n, __VA_ARGS__)
#define SCOPE_EXIT(...) SCOPE_EXIT_FWD(__LINE__, __VA_ARGS__)