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| // aligned_union example #include <iostream> #include <type_traits> union U { int i; char c; double d; U(const char* str) : c(str[0]) {} }; // non-POD typedef std::aligned_union<sizeof(U),int,char,double>::type U_pod; int main() { U_pod a,b; // default-initialized (ok: type is POD) new (&a) U ("hello"); // call U's constructor in place b = a; // assignment (ok: type is POD) std::cout << reinterpret_cast<U&>(b).i << std::endl; return 0; }
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