2 Commits

Author	SHA1	Message	Date
Pavel Yaskevich	c30845fa74	[ConstraintSystem] Detect and diagnose missing generic arguments ... Introduce a fix to detect and diagnose situations when omitted generic arguments couldn't be deduced by the solver based on the enclosing context. Example: ```swift struct S<T> { } _ = S() // There is not enough context to deduce `T` ``` Resolves: rdar://problem/51203824	2019-05-29 16:39:41 -07:00
Pavel Yaskevich	09cb803e79	[CSDiag] Always attempt to erase open existentials after re-typecheck ... All of the open existentials should be removed, along with their opaque value expressions, after sub-expression type-check. Because diagnostics might pick next sub-expression from constraint and its anchor could point to sub-expression which has only opaque value without enclosing open existential, which is going to trip up sanitizer. Resolves: rdar://problem/46544601	2018-12-21 00:34:27 -08:00