(Declared but not defined) Return bslmf::Tag<true>() if the argument is volatile‐qualified and bslmf::Tag<false>() otherwise. Note that if t_TP is both const‐ and volatile‐qualified, it will not match volatile t_TP&, hence the need for the const overloads.
Synopsis
Declared in <bslmf_invokeresult.h>
template<class t_TP>
static
bslmf::Tag<false>
checkVolatile(t_TP&);
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