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| // is_union example #include <iostream> #include <type_traits> union A { int i; float f; }; // named union struct B { union { int foo; float bar; }; // anonymous member union }; int main() { std::cout << std::boolalpha; std::cout << "is_union:" << std::endl; std::cout << "int: " << std::is_union<int>::value << std::endl; std::cout << "A: " << std::is_union<A>::value << std::endl; std::cout << "B: " << std::is_union<B>::value << std::endl; return 0; }
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