Because in your example T = CustomStringConvertible On Mon, Apr 18, 2016 at 10:51 AM, tuuranton--- via swift-users < swift-users@swift.org> wrote:
> Why does this compile? > > let t1: Int? = 2 > print(t1 ?? "asdf") > > The type of ?? is this: > > @warn_unused_result > public func ??<T>(optional: T?, @autoclosure defaultValue: () throws -> T) > rethrows -> T > > The type syas that T must be the same type throughout. But above I could > successfully use Int? and then String. Why? > > _______________________________________________ > swift-users mailing list > swift-users@swift.org > https://lists.swift.org/mailman/listinfo/swift-users > > -- Marius Serban
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