Pavel Yaskevich 9588d519c6 [CSOptimizer] Fix a conditional that ignores function type parameters to look through optionals ...

Since parameters that have function types don't participate in
ranking, function types that are wrapped in optionals should be
excluded as well, because it's possible to overload on that and
such overloads with optional types would gain an undue advantage.

For example:

```
func test(_: (() -> Void)?) {}
func test(_: () -> Void) {}

func compute(handler: () -> Void) {
  test(handler)
}
```

Without this change the second overload would be ignored and
the first one would be an exact match.

Resolves: rdar://157234317

2025-08-01 10:59:52 -07:00

72 KiB

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