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* [SILGen] Emit unreachable code diagnostics for single expression closures with implicit returns too * [Test] Update diagnostic in test/SILGen/functions_uninhabited_param.swift
30 lines
1.0 KiB
Swift
30 lines
1.0 KiB
Swift
// RUN: %target-swift-emit-sil %s -o /dev/null -verify
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//===--- Function declaration with uninhabited parameter type
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func foo(baz: Never) -> Int { // expected-note {{'baz' is uninhabited, so this function body can never be executed}}
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print("I can't be called!") // expected-warning{{will never be executed}}
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return 0
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}
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func bar(baz: Never) -> Int {} // ok
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// SR-13432
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func map<T>(_ block: (Never) -> T) {}
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map { arg in // expected-note {{'arg' is uninhabited, so this function body can never be executed}}
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5 // expected-warning {{will never be executed}}
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}
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map { arg in // expected-note {{'arg' is uninhabited, so this function body can never be executed}}
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return 5 // expected-warning {{will never be executed}}
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}
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// We used to crash when emitting the closure below.
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enum E {
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static func f(_: E) {}
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}
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let _: (E.Type) -> (E) -> () = { s in { e in s.f(e) } }
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// expected-warning@-1 {{will never be executed}}
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// expected-note@-2 {{'e' is uninhabited, so this function body can never be executed}}
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