> On Jul 26, 2015, at 16:50 , Quincey Morris > <quinceymor...@rivergatesoftware.com> wrote: > > On Jul 26, 2015, at 16:38 , Rick Mann <rm...@latencyzero.com> wrote: >> >> So, is a literal 0.0 not of type Double? > > No, it’s a numeric literal, so it has no numeric type. However your ‘addArc’ > function requires CGFloat parameters. Literal 0.0 is convertible to CGFloat, > but Double M_PI isn’t convertible automatically. > >> And can CGFloat be made to be implicitly assignable from Double? > > No. Swift doesn’t convert between numeric types automatically, so Double —> > CGFloat produces an error. However, many types satisfy a > ‘…LiteralConvertible’ protocol, which allows the compiler to treat a > compile-time literal such as 0 (which is ambiguous as to Swift type) to the > type expected in a given context.
So, why can I do this? let n : NSNumber = M_PI -- Rick Mann rm...@latencyzero.com _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
