Mark Lacey 00cc26004b [Sema] Penalize conversions to Any. ...

We previously penalized bindings to Any, and that resulted in
inappropriately rejecting solutions where we bind a decl that is
explicitly typed Any. That penalty was removed in
170dc8acd7, but that has led to a variety
of source compatibility issues.

So now, we'll reintroduce a penalty for Any-typed things, but instead of
penalizing bindings (which happen both because of explicitly-typed
values in the source, and implicitly due to attempting various types for
a particular type variable), penalize casts, which are always present in
some form in the source.

Thanks go to John for the suggestion.

Fixes
  SR-3817 (aka rdar://problem/30311052)
  SR-3786 (aka rdar://problem/30268529)
  rdar://problem/29907555

2017-02-02 17:37:02 -08:00

167 KiB

Raw Blame History

View Raw