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a9e871a0b1
Emit a warning that tuple shuffling is deprecated across the board. In the future, we should try to unshuffle these expressions where we can, but that's a diagnostic improvement for another day. See also https://forums.swift.org/t/deprecating-tuple-shuffles-round-2/16884/30
32 lines
1.1 KiB
Swift
32 lines
1.1 KiB
Swift
// RUN: %target-typecheck-verify-swift -swift-version 5
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func consume<T>(_ x: T) {} // Suppress unused variable warnings
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func shuffle_through_initialization() {
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let a = (x: 1, y: 2)
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let b: (y: Int, x: Int)
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b = a // expected-warning {{expression shuffles the elements of this tuple}}
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consume(b)
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}
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func shuffle_through_destructuring() {
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let a = (x: 1, y: 2)
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let (y: b, x: c) = a // expected-warning {{expression shuffles the elements of this tuple}}
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consume((b, c))
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}
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func shuffle_through_call() {
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func foo(_ : (x: Int, y: Int)) {}
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foo((y: 5, x: 10)) // expected-warning {{expression shuffles the elements of this tuple}}
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}
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func shuffle_through_cast() {
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let x = ((a: Int(), b: Int()) as (b: Int, a: Int)).0 // expected-warning {{expression shuffles the elements of this tuple}}
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// Ah, the famous double-shuffle
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let (c1, (c2, c3)): (c: Int, (b: Int, a: Int)) = ((a: Int(), b: Int()), c: Int())
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// expected-warning@-1 {{expression shuffles the elements of this tuple}}
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// expected-warning@-2 {{expression shuffles the elements of this tuple}}
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consume((x, c1, c2, c3))
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}
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