winebarrel https://blog.hatena.ne.jp/winebarrel/ so what https://so-wh.at/ C++ _Bool_typeが気になったので少し調査。 #include <iostream> using namespace std; class TrueFalse { bool r_; public: TrueFalse(bool r) : r_(r) {}; operator std::_Bool_type() const { return r_ ? _CONVERTIBLE_TO_TRUE : 0; } }; void print_bool(TrueFalse& tf) { cout << (tf ? "true" : "false") << endl; } int main() { Tru… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fso-wh.at%2Fentry%2F20090603%2Fp4" title=" _Bool_type - so what" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2009-06-03 00:00:00 rich https://so-wh.at/entry/20090603/p4 1.0 100%