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[TypeChecker] NFC: Add a test-case for rdar://77233864 #37098

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Merged
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Apr 28, 2021
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[TypeChecker] NFC: Add a test-case for rdar://77233864 #37098

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12 changes: 12 additions & 0 deletions test/Constraints/generics.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -858,3 +858,15 @@ func rdar56212087() {

setValue(foo("", ""), forKey: "") // Ok (T is inferred as a `String` instead of `Any?`)
}

// rdar://77233864 - Ternary operator fails to deduce non-default literal type in SwiftUI preview
func test_ternary_operator_with_regular_conformance_to_literal_protocol() {
// Note that in this case `ExpressibleByIntegerLiteral` is a non-literal requirement
func test<T: ExpressibleByIntegerLiteral>(_: T) -> T {
fatalError()
}

func bug(_: Float?) {}

bug(true ? test(0) : test(42)) // Ok - type is `CGFloat` for 0 and 42
}