Pavel Yaskevich 65adc18139 [ConstraintSystem] Delay constraint generation from single-statement closure body ...

Attempt to infer a closure type based on its parameters and body
and put it aside until contextual type becomes available or it
has been determined that there is no context.

Once all appropriate conditions are met, generate constraints for
the body of the closure and bind it the previously inferred type.

Doing so makes it possible to pass single-statement closures as
an argument to a function builder parameter.

Resolves: SR-11628
Resolves: rdar://problem/56340587

2020-01-14 00:09:32 -08:00

350 KiB

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