After reviewing the code of stdlib I found no one actually implements _customContainsEquatableElement: 1. Its default implementation in `SequenceType` just returns nil. 2. The implementation in `Set` delegates to `contains` which is bad because it reverses their relationship: the default implementation of `contains` in `SequenceType` delegates to `_customContainsEquatableElement`. 3. In all other place it just delegates to another `SequenceType`.
So no one is doing real work. If the current _customContainsEquatableElement is only a relic I suggest we remove it and clean up related code. _______________________________________________ swift-dev mailing list swift-dev@swift.org https://lists.swift.org/mailman/listinfo/swift-dev
