Alias to the return type of the bsl::decay meta-function.
Declared in <bslmf_decay.h>
template<class t_TYPE>
using decay_t = decay<t_TYPE>::type;decay_t is an alias to the return type of the bsl::decay meta-function. Note, that the decay_t avoids the ::type suffix and typename prefix when we want to use the result of the meta-function in templates.