[swift-evolution] Protocol requirement `where` clauses constraining associated types

[Dave Abrahams]

on Wed Feb 08 2017, Slava Pestov <swift-evolution at swift.org> wrote:

> Hah, Doug and I were just discussing this.

Funny thing; Nate Cook and I were just discussing the same thing today.
It seems like this hack we did in the standard library points to a
missing language feature; one with possible ABI impact.

-- 
-Dave