ClassCast-Exception beim Id-Beispiel #6
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Bei folgendendem Beispiel
class Id {
<GPM, FNF extends GPM> Fun1<? extends GPM, ? super FNF> op = (x) -> x;
}
erhält man folgenden Fehler:
java.lang.ClassCastException: de.dhbwstuttgart.syntaxtree.type.ExtendsWildcardType cannot be cast to de.dhbwstuttgart.syntaxtree.type.RefType
Es ist ein Fehler aufgetreten:
Fehler beim Parsen und Inferieren
Fehler tritt bei Bytecode auf.
java.lang.ClassCastException: de.dhbwstuttgart.syntaxtree.type.ExtendsWildcardType cannot be cast to de.dhbwstuttgart.syntaxtree.type.RefType
at de.dhbwstuttgart.syntaxtree.type.RefType.getCombinedType(RefType.java:872)
at de.dhbwstuttgart.syntaxtree.type.RefType.getBytecodeType(RefType.java:824)
at de.dhbwstuttgart.syntaxtree.FieldDeclaration.genByteCode(FieldDeclaration.java:175)
at de.dhbwstuttgart.syntaxtree.Class.genByteCode(Class.java:113)
at de.dhbwstuttgart.typeinference.TypeinferenceResultSet.codegen(TypeinferenceResultSet.java:122)
at typinferenzplugin.Typinferenz.run(Typinferenz.java:58)
at typinferenzplugin.editor.JavEditor.typeReconstruction(JavEditor.java:111)
at typinferenzplugin.editor.JavEditor.doSave(JavEditor.java:96)
at org.eclipse.ui.texteditor.AbstractTextEditor$TextEditorSavable.doSave(AbstractTextEditor.java:7209)
at org.eclipse.ui.Saveable.doSave(Saveable.java:216)
Test: IdentityFieldTest umgesetzt
Trace:
java.lang.NullPointerException
at de.dhbwstuttgart.syntaxtree.type.RefType.getCombinedType(RefType.java:862)
at de.dhbwstuttgart.syntaxtree.type.RefType.getBytecodeType(RefType.java:827)
at de.dhbwstuttgart.syntaxtree.FieldDeclaration.genByteCode(FieldDeclaration.java:176)
at de.dhbwstuttgart.syntaxtree.Class.genByteCode(Class.java:115)
at de.dhbwstuttgart.syntaxtree.SourceFile.generateBytecode(SourceFile.java:1746)
at de.dhbwstuttgart.core.MyCompiler.generateBytecode(MyCompiler.java:326)
at bytecode.SingleClassTester.compileToBytecode(SingleClassTester.java:38)
at bytecode.IdentityFieldTest.test(IdentityFieldTest.java:12)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.internal.runners.TestMethodRunner.executeMethodBody(TestMethodRunner.java:99)
at org.junit.internal.runners.TestMethodRunner.runUnprotected(TestMethodRunner.java:81)
at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
at org.junit.internal.runners.TestMethodRunner.runMethod(TestMethodRunner.java:75)
at org.junit.internal.runners.TestMethodRunner.run(TestMethodRunner.java:45)
at org.junit.internal.runners.TestClassMethodsRunner.invokeTestMethod(TestClassMethodsRunner.java:71)
at org.junit.internal.runners.TestClassMethodsRunner.run(TestClassMethodsRunner.java:35)
at org.junit.internal.runners.TestClassRunner$1.runUnprotected(TestClassRunner.java:42)
at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
at org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Fehler triff auf, da beim GenericTypeVar die Methode getBytecodeType nicht implementiert ist.
OLD BUG