cpp-game-engine/util/scope_exit.hpp

//
//  scope_exit.hpp
//  gameutils
//
//  Created by Sam Jaffe on 7/5/16.
//

#pragma once

#include <functional>

#undef CONCAT2
#define CONCAT2(A, B) A##B
#undef CONCAT
#define CONCAT(A, B) CONCAT2(A, B)
#define scope(type) scope_##type##_t CONCAT( scope_,CONCAT( type, __LINE__ ) ) = [&]()

class scope_exit_t {
public:
  template <typename F>
  scope_exit_t(F && fun) : _func(fun) {}
  scope_exit_t(scope_exit_t && other) : _func(std::move(other._func)) {}
  ~scope_exit_t() { _func(); }
private:
  std::function<void()> _func;
};