rust-lang/rfcs — pull request #245 by nick29581 (2014-09-17 21:50:34+00:00)
Title: Efficient single inheritance with traits.

Efficient single inheritance via virtual structs and unification and nesting of structs and enums. In contrast to #142, this RFC uses traits for virtual dispatch rather than a custom system around impls. The parts of the RFC about nested structs and enums are identical to #142.