src/Helper/MakeFixPoint.hpp

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• Last update: 2021-03-05 20:51:19+09:00
• Include: #include "src/Helper/MakeFixPoint.hpp"

概要

ラムダ式による再帰のヘルパー

使い方

int main() {
    dfs = make_fix_point([&](auto&& self) -> T {
        return self();
    });
    dfs();
}

Code

/// @docs src/Helper/MakeFixPoint.md
template <typename F> struct FixPoint : F {
    FixPoint(F&& f) : F(std::forward<F>(f)) {}
    template <typename... Args> decltype(auto) operator()(Args&&... args) const {
        return F::operator()(*this, std::forward<Args>(args)...);
    }
};
template <typename F> decltype(auto) make_fix_point(F&& f) { return FixPoint<F>{std::forward<F>(f)}; }

#line 1 "src/Helper/MakeFixPoint.hpp"
/// @docs src/Helper/MakeFixPoint.md
template <typename F> struct FixPoint : F {
    FixPoint(F&& f) : F(std::forward<F>(f)) {}
    template <typename... Args> decltype(auto) operator()(Args&&... args) const {
        return F::operator()(*this, std::forward<Args>(args)...);
    }
};
template <typename F> decltype(auto) make_fix_point(F&& f) { return FixPoint<F>{std::forward<F>(f)}; }

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