Makes an instance of the common type of two types.
template<class Ty0, Ty1>
struct common_type;
Parameters
Parameter |
Description |
|---|---|
Ty0 |
The type to evaluate. |
Ty1 |
The type to evaluate. |
Remarks
An instance of this type modifier holds a modified-type that is:
Ty, if the template parameter pack has exactly one argument.
the type of the expression decltype(true ? Tgen() : Ugen()), where Tgen() is an imaginary function returning a value of type T&& and Ugen() is an imaginary function returning a value of type U&&, if the template parameter pack has exactly two arguments T and U.
Requirements
Header: <type_traits>
Namespace: std