25 lines
680 B
C++
25 lines
680 B
C++
#ifndef FIRST_DEFER_HEADER
|
|
#define FIRST_DEFER_HEADER
|
|
|
|
template <typename T>
|
|
struct DEFER_ExitScope {
|
|
T lambda;
|
|
DEFER_ExitScope(T lambda) : lambda(lambda) {}
|
|
~DEFER_ExitScope() { lambda(); }
|
|
DEFER_ExitScope(const DEFER_ExitScope &i) : lambda(i.lambda){};
|
|
|
|
private:
|
|
DEFER_ExitScope &operator=(const DEFER_ExitScope &);
|
|
};
|
|
|
|
class DEFER_ExitScopeHelp {
|
|
public:
|
|
template <typename T>
|
|
DEFER_ExitScope<T> operator+(T t) { return t; }
|
|
};
|
|
|
|
#define DEFER_CONCAT_INTERNAL(x, y) x##y
|
|
#define DEFER_CONCAT(x, y) DEFER_CONCAT_INTERNAL(x, y)
|
|
#define defer const auto DEFER_CONCAT(defer__, __LINE__) = DEFER_ExitScopeHelp() + [&]()
|
|
|
|
#endif |