I need a template constraint to ensure a struct is not copyable. While I found hasElaborateCopyConstructor* in std.traits, there seems not to be something like isCopyConstructible. Shall I create an enhancement request or did I miss something? Same question for isDefaultConstructible.

* This site and TDPL both try to make a clear distinction between C++'s copy constructor and D's postblit. Wouldn't hasElaboratePostblit be a better name?