Pavel Kirpichenkov
c5893913f3
Coersion to Unit from error type leads to misleading type mismatches: "expected <expected lambda return type> found Unit", despite no user-provided Unit / empty lambda. These diagnostics were collected, but not reported before, and that had been disguising the issue for a while. KT-34729 Fixed
75 lines
3.3 KiB
Kotlin
Vendored
75 lines
3.3 KiB
Kotlin
Vendored
// !DIAGNOSTICS: -UNUSED_PARAMETER
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// !WITH_NEW_INFERENCE
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fun takeFnToAny(fn: () -> Any) {}
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fun takeFnToUnit(fn: () -> Unit) {}
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fun <P> takeFnToParameter(fn: () -> P) {}
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fun testAny() {
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takeFnToAny { }
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takeFnToAny { Unit }
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takeFnToAny { <!UNRESOLVED_REFERENCE!>unresolved<!>() }
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takeFnToAny { if (true) <!UNRESOLVED_REFERENCE!>unresolved<!>() }
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takeFnToAny { if (true) <!UNRESOLVED_REFERENCE!>unresolved<!>() else <!UNRESOLVED_REFERENCE!>unresolved<!>() }
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takeFnToAny(fun() = Unit)
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takeFnToAny(fun() {})
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takeFnToAny(fun() { return })
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takeFnToAny(fun() { return Unit })
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takeFnToAny(fun(): Unit {})
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takeFnToAny(fun(): Unit { return })
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takeFnToAny(fun(): Unit { return Unit })
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takeFnToAny(fun() { if (true) return })
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takeFnToAny(fun() { if (true) return Unit })
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takeFnToAny(fun() = <!UNRESOLVED_REFERENCE!>unresolved<!>())
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takeFnToAny(fun() { <!UNRESOLVED_REFERENCE!>unresolved<!>() })
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takeFnToAny(fun(): Unit { <!UNRESOLVED_REFERENCE!>unresolved<!>() })
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takeFnToAny(fun() { return <!UNRESOLVED_REFERENCE!>unresolved<!>() })
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takeFnToAny(fun() { if (true ) return <!UNRESOLVED_REFERENCE!>unresolved<!>() })
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}
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fun testUnit() {
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takeFnToUnit { }
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takeFnToUnit { Unit }
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takeFnToUnit { <!UNRESOLVED_REFERENCE!>unresolved<!>() }
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takeFnToUnit { if (true) <!UNRESOLVED_REFERENCE!>unresolved<!>() }
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takeFnToUnit { if (true) <!UNRESOLVED_REFERENCE!>unresolved<!>() else <!UNRESOLVED_REFERENCE!>unresolved<!>() }
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takeFnToUnit(fun() = Unit)
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takeFnToUnit(fun() {})
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takeFnToUnit(fun() { return })
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takeFnToUnit(fun() { return Unit })
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takeFnToUnit(fun(): Unit {})
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takeFnToUnit(fun(): Unit { return })
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takeFnToUnit(fun(): Unit { return Unit })
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takeFnToUnit(fun() { if (true) return })
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takeFnToUnit(fun() { if (true) return Unit })
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takeFnToUnit(fun() = <!UNRESOLVED_REFERENCE!>unresolved<!>())
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takeFnToUnit(fun() { <!UNRESOLVED_REFERENCE!>unresolved<!>() })
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takeFnToUnit(fun(): Unit { <!UNRESOLVED_REFERENCE!>unresolved<!>() })
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takeFnToUnit(fun() { return <!UNRESOLVED_REFERENCE!>unresolved<!>() })
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takeFnToUnit(fun() { if (true ) return <!UNRESOLVED_REFERENCE!>unresolved<!>() })
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}
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fun testParameter() {
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takeFnToParameter { }
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takeFnToParameter { Unit }
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takeFnToParameter { <!UNRESOLVED_REFERENCE!>unresolved<!>() }
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takeFnToParameter { if (true) <!UNRESOLVED_REFERENCE!>unresolved<!>() }
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takeFnToParameter {
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if (true) <!UNRESOLVED_REFERENCE!>unresolved<!>() else <!UNRESOLVED_REFERENCE!>unresolved<!>()
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}
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takeFnToParameter(fun() = Unit)
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takeFnToParameter(fun() {})
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takeFnToParameter(fun() { return })
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takeFnToParameter(fun() { return Unit })
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takeFnToParameter(fun(): Unit {})
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takeFnToParameter(fun(): Unit { return })
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takeFnToParameter(fun(): Unit { return Unit })
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takeFnToParameter(fun() { if (true) return })
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takeFnToParameter(fun() { if (true) return Unit })
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takeFnToParameter(fun() = <!UNRESOLVED_REFERENCE!>unresolved<!>())
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takeFnToParameter(fun() { <!UNRESOLVED_REFERENCE!>unresolved<!>() })
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takeFnToParameter(fun(): Unit { <!UNRESOLVED_REFERENCE!>unresolved<!>() })
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takeFnToParameter(fun() { return <!UNRESOLVED_REFERENCE!>unresolved<!>() })
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takeFnToParameter(fun() { if (true ) return <!UNRESOLVED_REFERENCE!>unresolved<!>() })
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}
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