Andrey Breslav
32 lines
785 B
Plaintext
32 lines
785 B
Plaintext
// KT-353 Generic type argument inference sometimes doesn't work
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trait A {
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fun <T> gen() : T
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}
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fun foo(a: A) {
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val <!UNUSED_VARIABLE!>g<!> : fun() : Unit = {
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a.gen() //it works: Unit is derived
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}
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val <!UNUSED_VARIABLE!>u<!>: Unit = a.gen() // Unit should be inferred
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if (true) {
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a.<!TYPE_INFERENCE_FAILED!>gen()<!> // Shouldn't work: no info for inference
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}
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val <!UNUSED_VARIABLE!>b<!> : fun() : Unit = {
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if (true) {
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a.gen() // unit can be inferred
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}
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else {
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()
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}
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}
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val <!UNUSED_VARIABLE!>f<!> : fun() : Int = { () : Int =>
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a.gen() //type mismatch, but Int can be derived
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}
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a.<!TYPE_INFERENCE_FAILED!>gen()<!> // Shouldn't work: no info for inference
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} |