swift

2807a17e - [Type checker SR-899] Warning on missing ".self" for single-parameter functions.

[Type checker SR-899] Warning on missing ".self" for single-parameter functions. Due to a modeling error in the type checker's folding of type references into type expressions, code such as "strideof(Int)" would be accepted without the required ".self". Commit 4a60b6cbf4fa2a410aebf7f725865395c99ef6ca fixes the modeling issue but left the historical accepts-invalid; now, diagnose these cases with a warning + Fix-It to ease the transition. Fixes SR-899.