Pavel Yaskevich 4f63c4af71 [ConstraintSystem] Detect and diagnose extraneous returns from void functions ...

Diagnose an attempt return something from a function which
doesn't have a return type specified e.g.

```swift
func foo() { return 42 }
```

2019-05-07 13:43:14 -07:00

263 KiB

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