bsl/conditional_8hpp_source.html

 #ifndef BSL_CONDITIONAL_HPP
 #define BSL_CONDITIONAL_HPP

 namespace bsl
 {
     template<bool B, typename T, typename F>
     struct conditional final
     {
         using type = T;
     };

     template<bool B, typename T, typename F>
     using conditional_t = typename conditional<B, T, F>::type;


     template<typename T, typename F>
     struct conditional<false, T, F> final
     {
         using type = F;
     };

 }

 #endif
bsl::conditional
Provides the member typedef type which is the same as T if B is true, otherwise is the same as F.
Definition: conditional.hpp:46

bsl::conditional_t
typename conditional< B, T, F >::type conditional_t
a helper that reduces the verbosity of bsl::conditional
Definition: conditional.hpp:54

bsl::conditional::type
T type
provides the member typedef "type"
Definition: conditional.hpp:49