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#pragma once
template <class Func>
struct YCombinator {
// NOTE: implicit constructor allows initializing this
Func func;
template <class... Ts>
decltype(auto) operator()(Ts&&... args) const {
// NOTE: static_cast<Ts>(args)... is equivalent to std::forward<Ts>(args)...
// written this way so that we don't have to include <utility>, as well as reducing template instanciations to help compile time
return func(*this, static_cast<Ts>(args)...);
}
};
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