Make computation of arguments for raw types lazy
See how we translate raw types to Kotlin model: RawType(A) = A<ErasedUpperBound(T1), ...> ErasedUpperBound(T : G<t>) = G<*> // UpperBound(T) is a type G<t> with arguments ErasedUpperBound(T : A) = A // UpperBound(T) is a type A without arguments ErasedUpperBound(T : F) = UpperBound(F) // UB(T) is another type parameter F Stack overflow happens with the following classes: class A<X extends B> // NB: raw type B in upper bound class B<Y extends A> // NB: raw type A in upper bound when calculating raw type for A, we start calculate ErasedUpperBound(Y), thus starting calculating raw type for B => ErasedUpperBound(X) => RawType(A), so we have SOE here. The problem is that we calculating the arguments for these raw types eagerly, while from the definition of ErasedUpperBound(Y) we only need a type constructor of raw type B (and the number of parameters), we don't use its arguments. The solution is to make arguments calculating for raw types lazy #KT-16528 Fixed
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@@ -0,0 +1,19 @@
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// FILE: JavaScriptParser.java
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public class JavaScriptParser<T extends JSPsiTypeParser> {
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public String foo() {return "OK";}
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}
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// FILE: JSPsiTypeParser.java
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public class JSPsiTypeParser<T extends JavaScriptParser> {}
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// FILE: ES6Parser.java
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public class ES6Parser<T extends JSPsiTypeParser> extends JavaScriptParser<T> {}
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// FILE: main.kt
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fun createParser(): JavaScriptParser<*> {
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return ES6Parser<JSPsiTypeParser<*>>()
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}
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fun box(): String = createParser().foo()
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@@ -0,0 +1,21 @@
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// WITH_RUNTIME
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// FILE: Device.java
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import java.util.Collection;
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public class Device<D extends Device, S extends Service> {
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public static Collection<Device<Device, Service>> getLoop() {
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return null;
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}
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}
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// FILE: Service.java
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public class Service<D extends Device, S extends Service> {
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}
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// FILE: loop.kt
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fun box(): String {
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val x = Device.getLoop()?.firstOrNull() // compilation error
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return "OK"
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}
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