DigitalGhost https://blog.hatena.ne.jp/DigitalGhost/ デ-mk6 https://dechimal.hatenadiary.com/ C++ お遊び。 namespace ns { typedef int declared; struct undeclared { int dummy[2]; }; template<size_t> struct S; template<> struct S<sizeof(undeclared)> { template<int> struct SS { declared n; void operator=(int) {} SS(int) {} friend SS & operator>(int, SS & ss) { return ss; } }; }; template<> struct S<siz… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fdechimal.hatenadiary.com%2Fentry%2F20090216%2F1234793122" title="同じスコープ内に重複した名前を宣言する - デ-mk6" 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 2009-02-16 23:05:22 rich https://dechimal.hatenadiary.com/entry/20090216/1234793122 1.0 100%