Pavel Yaskevich 04e2795a03 [ConstraintSystem] Don't bind result type of an empty closure too early ...

Instead of setting empty closure (`{}`) result type to be `Void`
while generating constraints, let's allocate a new type variable
instead and let it be bound to `Void` once the body is opened.

This way we can support an interaction with function builders which
would return a type different from `Void` even when applied to empty closure.

Resolves: rdar://problem/61347993

2020-04-06 15:55:55 -07:00

14 KiB

Raw Blame History

View Raw