PSI2IR: SAM conversion in method arguments of out-projected Java classes

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'.
This commit is contained in:
Dmitry Petrov
2019-12-31 16:35:44 +03:00
parent a55bce801e
commit d27593aeda
13 changed files with 145 additions and 19 deletions
@@ -0,0 +1,38 @@
// WITH_RUNTIME
// FILE: genericSamProjectedOut.kt
import example.SomeJavaClass
fun test(a: SomeJavaClass<out String>) {
// a::someFunction parameter has type of Nothing
// while it's completely safe to pass a lambda for a SAM
// since Hello is effectively contravariant by its parameter
a.someFunction {}
a + {}
a[{}]
}
// FILE: example/Hello.java
package example;
@FunctionalInterface
public interface Hello<A> {
void invoke(A a);
}
// FILE: example/SomeJavaClass.java
package example;
public class SomeJavaClass<A> {
public void someFunction(Hello<A> hello) {
((Hello)hello).invoke("OK");
}
public void plus(Hello<A> hello) {
((Hello)hello).invoke("OK");
}
public void get(Hello<A> hello) {
((Hello)hello).invoke("OK");
}
}