This is unfortunate, but it mostly applies to built-in types (since they don't have a declaration anywhere). Types that are defined entirely in libraries do hav

This is unfortunate, but it mostly applies to built-in types (since they don't have a declaration anywhere). Types that are defined entirely in libraries do have their trait implementations explicitly listed, e.g. http://seld.be/rustdoc/master/extra/dlist/struct.DList.html#implementations http://seld.be/rustdoc/master/extra/dlist/struct.DList.html#...