swift format fails when using new `sending` keyword

[fabianfett]

swift format fails when using new sending keyword.

Steps To Reproduce:

1. Create a Foo.swift with following content and save:

struct Foo {
  var bar: String
}

func whatever(_ foo: sending Foo) {

}

2. Run swift format Foo.swift on cli.

Results:

Observed:

Invocation fails: /Users/fabian/Developer/test.swift:5:30: error: unexpected code 'Foo' in parameter clause.

Expected:

swift format succeeds.

Notes:

Fails with Swift from Xcode-beta and swift-6.0-nightly on linux.

[ahoppen]

Synced to Apple’s issue tracker as rdar://135336930

[allevato]

This looks like a swift-syntax issue.

@ahoppen, since SE-0430 was accepted for Swift 6.0, should the sendingArgsAndResults experimental feature be removed and made unconditional?

[ahoppen]

Yes, that’s a swift-syntax issue. I’ll take it.

[ahoppen]

Should be fixed by:

• main: Enable the sendingArgsAndResults experimental feature #2835
• release/6.0: [6.0] Enable the sendingArgsAndResults experimental feature #2837
• release/6.0.0: [6.0.0] Enable the sendingArgsAndResults experimental feature #2838
• release/6.0.1: [6.0.1] Enable the sendingArgsAndResults experimental feature #2839