[Diagnostics] Extend single parameter tuple splat to support generic parameters #27584
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…parameters
Currently single parameter tuple splat fix/diagnostic supports only
cases where parameter is a concrete tuple type, let's enhance that to
support generic parameters as well e.g.:
```swift
func foo<T>(_: T) {}
foo(0, 1, 2) // `T` expects arguments to form a tuple e.g. `foo((0, 1, 2))`
```
In situations like this:
```swift
func foo(x: (Int, Int) {}
foo(x: 0, 0)
```
Left paren to form a missing tuple should be placed after
the label because belongs to the parameter and not the tuple.
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jrose-apple
reviewed
Oct 9, 2019
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…neric parameter Since it's hard to say whether tuple use is really intended, let's add `did you mean to pass a tuple?` note to the error message.
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Currently single parameter tuple splat fix/diagnostic supports only
cases where parameter is a concrete tuple type, let's enhance that to
support generic parameters as well e.g.: