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