Pavel Yaskevich 3af163a94c [ConstraintSystem] Detect and fix extraneous use of & ...

Diagnose extraneous use of address of (`&`) which could only be
associated with arguments to `inout` parameters e.g.

```swift
struct S {}

var a: S = ...
var b: S = ...

a = &b
```

2019-05-06 11:18:47 -07:00

263 KiB

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