Pavel Yaskevich d06126da3b [Parser] Add support for multiple trailing closures syntax ...

Accept trailing closures in following form:

```swift
foo {
  <label-1>: { ... }
  <label-2>: { ... }
  ...
  <label-N>: { ... }
}
```

Consider each labeled block to be a regular argument to a call or subscript,
so the result of parser looks like this:

```swift
foo(<label-1>: { ... }, ..., <label-N>: { ... })
```

Note that in this example parens surrounding parameter list are implicit
and for the cases when they are given by the user e.g.

```swift
foo(bar) {
  <label-1>: { ... }
  ...
}
```

location of `)` is changed to a location of `}` to make sure that call
"covers" all of the transformed arguments and parser result would look
like this:

```swift
foo(bar,
   <label-1>: { ... }
)
```

Resolves: rdar://problem/59203764

2020-05-06 01:56:40 -04:00

47 KiB

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