Return a bdld::Datum object containing a map of the specified entries. The entries are supplied as pairs (odd number of sizeof...(entries) being an error) where the first specified element is the key, and the second is its corresponding value. The behavior is undefined if the same key is supplied more than once.
Declared in <bdld_datummaker.h>
template<typename... ENTRIES>
bdld::Datum
m(ENTRIES const&... entries) const;