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| // conditional example #include <iostream> #include <type_traits> int main() { short int i = 1; // code does not compile if type of i is not integral typedef std::conditional<true,int,float>::type A; // int typedef std::conditional<false,int,float>::type B; // float typedef std::conditional<std::is_integral<A>::value,long,int>::type C; // long typedef std::conditional<std::is_integral<B>::value,long,int>::type D; // int std::cout << std::boolalpha; std::cout << "typedefs of int:" << std::endl; std::cout << "A: " << std::is_same<int,A>::value << std::endl; std::cout << "B: " << std::is_same<int,B>::value << std::endl; std::cout << "C: " << std::is_same<int,C>::value << std::endl; std::cout << "D: " << std::is_same<int,D>::value << std::endl; return 0; }
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