(Declared but not defined) Return bslmf::Tag<true>() if the argument is const-qualified and bslmf::Tag<false>() otherwise.
bslmf::Tag<true>()
const
bslmf::Tag<false>()
Declared in <bslmf_invokeresult.h>
<bslmf_invokeresult.h>
template<class t_TP> static bslmf::Tag<false> checkConst(t_TP&);