Doug Gregor 25d40125e9 [Trailing closures] Bias toward the backward scan for ambiguities. ...

This approach, suggested by Xiaodi Wu, provides better source
compatibility for existing Swift code, by breaking ties in favor of the
existing Swift semantics. Each time the backward-scan rule is needed
(and differs from the forward-scan result), we will produce a warning
+ Fix-It to prepare for Swift 6 where the backward rule can be
removed.

2020-07-24 08:47:51 -07:00

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