We have a bug for this, https://bugs.swift.org/browse/SR-899. I had pretty much the same reaction you did, which is that it's definitely a bug but it's probably not worth changing right now.
Jordan > On Jun 2, 2016, at 13:21, Douglas Gregor via swift-dev <swift-dev@swift.org> > wrote: > > Hi all, > > While working on some unrelated refactoring, I stumbled across a minor fix > that would make use properly enforce “.self” when we want to get the metatype > of a named type. For example, the Swift compiler currently (incorrectly) > allows > > sizeof(UInt) > > which should be > > sizeof(UInt.self) > > The fix for this is actually pretty simple (patch attached), but the question > is… do we want to fix the problem, if we think that we’ll get SE-0090 that > makes “.self” go away? > > > https://github.com/apple/swift-evolution/blob/master/proposals/0090-remove-dot-self.md > > On the one hand, I want to fix the problem: > > * This came out of a desire to make the AST more sane. Essentially, the > folding of expressions into TypeExprs—which will go away entirely if/when > SE-0090 is implemented—is pulling in the parentheses describing call > arguments. Without the fix, we still have weird AST. > * SE-0090 is labeled as “deferred out of Swift 3”, so having the > compiler not implement the stated language for an entire release cycle seems > really unfortunate. > > OTOH, I don’t want to jerk people’s code around, forcing them to add “.self” > now only to remove it a year from now (or whenever). > > Thoughts? > > - Doug > > <enforce-metatype-self.patch>_______________________________________________ > swift-dev mailing list > swift-dev@swift.org > https://lists.swift.org/mailman/listinfo/swift-dev _______________________________________________ swift-dev mailing list swift-dev@swift.org https://lists.swift.org/mailman/listinfo/swift-dev
