Created
August 20, 2021 19:30
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Concept Lite (Filip Roséen)
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| #include <type_traits> | |
| template <class T, class = std::enable_if_t<std::is_integral<T>::value>> | |
| using integral_t = T; | |
| // the usage | |
| template <class T> | |
| void f(integral_t<T> a) {} | |
| int main() | |
| { | |
| f ( 123); // ok | |
| // f (3.14f); // ill-formed | |
| } |
Works fine as variadic argument too.
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One must be aware of the fact that the above technique will make it troublesome to provide an additional overload of f having the same signature — since we, effectively, are declaring
template<class T> void f (T)in both cases.