Failing to find a syntax which works to do this. What I’m trying to do here is
extend Array to conform to a protocol. The real example has constraints on the
Element of the Array, so I can’t just extend Array, I have to use a protocol
extension on the protocol (I can’t find a way to extend Array to conform to a
type and also have some constraints).
Since an Array is a SequenceType and that’s all I really need, I tried this,
this is the very distilled version
protocol Foo
{
}
extension Foo where Self : SequenceType
{
func bar()->Self
{
let retval : Array<Self.Generator.Element> = []
return retval
// error: cannot convert return expression of type
'Array<Self.Generator.Element>' to expected return type 'Self'
}
}
but I get the given error message and don’t see why (nor how to fix it). An
Array is a SequenceType, so one should be returnable as a ‘Self’ as long as
it’s an array of the right elements. Self.Generator.Element should be the
correct element type for the array. Compiler bug or something I’m missing?
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