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Selects one of two types, depending on the specified condition.
template<bool B, class Ty1, class Ty2>
struct conditional;
template<bool _Test,class T1,class T2>
using conditional_t = typename conditional<_Test, T1, T2>::type;
Parameters
Parameter |
Description |
|---|---|
B |
The value that determines the selected type. |
Ty1 |
The type to evaluate. |
Ty2 |
The type to evaluate. |
Remarks
conditional<B, Ty1, Ty2>::type evaluates to Ty1 when B evaluates to true, and evaluates to Ty2 when B evaluates to false.
Requirements
Header: <type_traits>
Namespace: std