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oboff/defer.hpp

Forked from pmttavara/defer.hpp
Created February 18, 2024 06:51
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The definitive defer implementation for C++. Syntax: defer { statements; };
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defer.hpp
#ifndef defer
struct defer_dummy {};
template <class F> struct deferrer { F f; ~deferrer() { f(); } };
template <class F> deferrer<F> operator*(defer_dummy, F f) { return {f}; }
#define DEFER_(LINE) zz_defer##LINE
#define DEFER(LINE) DEFER_(LINE)
#define defer auto DEFER(__LINE__) = defer_dummy{} *[&]()
#endif // defer
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oboff commented Feb 18, 2024

https://stackoverflow.com/a/42060129

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