15 lines
425 B
C++
15 lines
425 B
C++
template <typename F>
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struct Defer_Guard {
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Defer_Guard(F && f) : _f(f) {}
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~Defer_Guard() { _f(); }
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F _f;
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};
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struct Defer_Guard_Helper {
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template <typename F>
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Defer_Guard<F> operator+(F&& f) { return Defer_Guard<F>(static_cast<F &&>(f)); }
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};
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#define CONCAT_STR_INTERNAL(A, B) A##B
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#define CONCAT_STR(A, B) CONCAT_STR_INTERNAL(A, B)
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#define defer const auto CONCAT_STR(defer_, __LINE__) = Defer_Guard_Helper{} + [&]
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