It’s because the compiler does not support this yet. It’s the same with `let
cgColor: CGColor = .clear.cgColor // will not work`.
Instead you need to write `UIColor.clear.cgColor` or in your case
`Double.phythagoreanTruple.0`
Am 1. September 2017 um 12:17:57, Rudolf Adamkovič via swift-users
(swift-users@swift.org) schrieb:
Given the following extension ...
extension Double {
typealias Triple = (Double, Double, Double)
static let pythagoreanTriple: Triple = (3, 4, 5)
}
... why does Swift compiler emits the following errors?
// Type of expression is ambiguous without more context
let a: Double = .pythagoreanTriple.0
// Type of expression is ambiguous without more context
func f(_ x: Double) {}
f(.pythagoreanTriple.0)
The errors disappear with explicit Double.pythagoreanTriple.0.
Why doesn't the compiler infer Double in this case?
FYI: Posted also to Stack Overflow here:
https://stackoverflow.com/questions/45998034/type-of-expression-is-ambiguous-for-static-tuples
R+
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