swift-mirror/test/Constraints/moveonly_tuples.swift

// RUN: %target-swift-frontend -typecheck -verify %s

// Tuples with noncopyable elements are not yet supported. Make sure we reject
// them when code attempts to form such a type explicitly or by inference.

 struct Butt: ~Copyable {
    var x: Int
}

struct Foo: ~Copyable {
    var t: (Int, Butt) // expected-error{{tuple with noncopyable element type 'Butt' is not supported}}
}
struct Bar<T>: ~Copyable {
    var t: (T, Butt) // expected-error{{tuple with noncopyable element type 'Butt' is not supported}}
    var u: (Int, (T, Butt)) // expected-error{{tuple with noncopyable element type 'Butt' is not supported}}
}

func inferredTuples<T>(x: Int, y: borrowing Butt, z: T) {
    let a = (x, y) // expected-error{{type '(Int, Butt)' containing noncopyable element is not supported}}
    let b = (y, z) // expected-error{{type '(Butt, T)' containing noncopyable element is not supported}}
    let c = (x, y, z) // expected-error{{type '(Int, Butt, T)' containing noncopyable element is not supported}}
    _ = a
    _ = b
    _ = c
}