Commits
Dave Abrahams committed c2642e65e7d
[stdlib] id-as-Any: hashed collection casting Relax some preconditions in the cast machinery and write a comprehensive test suite. FIXMEs in test/1_stdlib/HashedCollectionCasts.swift.gyb show where the typechecker doesn't seem to quite work, or the frontend might be generating the wrong runtime calls. TODO: Add tests for failing downcasts