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d27593aeda
It uses the same logic as an old back-end (see SamType#createByValueParameter and genericSamProjectedOut.kt), split into two parts: 1. When inserting SAM casts, use SamType#createByValueParamerer to get the target SAM type. 2. When inserting implicit casts, cast SAM conversions as arguments of methods of out-projected types to the original type of value parameter instead of 'Nothing'.
62 lines
1.2 KiB
Kotlin
Vendored
62 lines
1.2 KiB
Kotlin
Vendored
// IGNORE_BACKEND_FIR: JVM_IR
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// TARGET_BACKEND: JVM
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// WITH_RUNTIME
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// FILE: example/Hello.java
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package example;
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@FunctionalInterface
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public interface Hello<A> {
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void invoke(A a);
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}
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// FILE: example/SomeJavaClass.java
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package example;
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public class SomeJavaClass<A> {
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public void someFunction(Hello<A> hello) {
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((Hello)hello).invoke("OK");
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}
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public void plus(Hello<A> hello) {
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((Hello)hello).invoke("OK");
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}
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public void get(Hello<A> hello) {
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((Hello)hello).invoke("OK");
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}
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}
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// FILE: main.kt
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import example.SomeJavaClass
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fun box(): String {
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val a: SomeJavaClass<out String> = SomeJavaClass()
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var result = "fail"
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// a::someFunction parameter has type of Nothing
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// while it's completely safe to pass a lambda for a SAM
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// since Hello is effectively contravariant by its parameter
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a.someFunction {
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result = it
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}
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if (result != "OK") return "fail 1: $result"
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result = "fail"
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a + {
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result = it
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}
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if (result != "OK") return "fail 2: $result"
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result = "fail"
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a[{
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result = it
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}]
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if (result != "OK") return "fail 3: $result"
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return "OK"
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}
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