[boost] [mpl] Metafunction to extract type

Subject: [boost] [mpl] Metafunction to extract type
From: Edward Diener (eldiener_at_[hidden])
Date: 2011-01-27 13:21:40

Does MPL already have a metafunction which takes a type, which is a 
nullary metafunction, and returns the nullary metafunction's nested type 
? As in:

     template
       <
       class T
       >
     struct get_type : T
       {
       };