SE-0276: Multi-Pattern Catch Clauses

[DevAndArtist (Adrian Meister)]

For example wouldn‘t a catch block also benefit from this ability as well (assuming it gets accepted and implemented)?

Ability to match a condition to multiple associated values from merged switch cases

I just had a small issue with a switch statement where I for some reason assumed that the where clause was already applied to every associated value of a merged switch case. enum Permission { case notSupported(UInt8) case readOnly(UInt8) case readWrite } let permission = Permission.notSupported(0) switch permission { case .notSupported(let code), .readOnly(let code) where code > 0: /* create the right error value */ default: /* create the default error value */ } The above exa…

do {
  ...
} catch {
case where <condition> in <pattern_1>, <pattern_2>:
  ...
}