Module kinds

Markers used to classify types, used as Kind associated types.

Enums

• IsIntoIterKind
  Marker for user-defined types that can be converted into const iterators
• IsIteratorKind
  Marker for const iterators
• IsNotStdKind
  Marker for non-standard library types.
• IsRefKind
  Marker for references.
• IsStdKind
  Marker for standard library types.