Uast: Rewrite visitor

plugins/uast-java/src/org/jetbrains/uast/java/expressions/JavaDumbUElement.kt

@@ -16,14 +16,13 @@
 package org.jetbrains.uast.java
 
 import com.intellij.psi.PsiElement
-import org.jetbrains.uast.LeafUElement
 import org.jetbrains.uast.UElement
 import org.jetbrains.uast.psi.PsiElementBacked
 
 class JavaDumbUElement(
         override val psi: PsiElement?,
         override val parent: UElement
-) : JavaAbstractUElement(), UElement, PsiElementBacked, LeafUElement {
+) : JavaAbstractUElement(), UElement, PsiElementBacked {
     override fun logString() = "JavaDumbUElement"
     override fun renderString() = "<stub@$psi>"
 }

plugins/uast-java/src/org/jetbrains/uast/java/expressions/JavaUInstanceCheckExpression.kt

@@ -30,6 +30,4 @@ class JavaUInstanceCheckExpression(
 
     override val operationKind: UastBinaryExpressionWithTypeKind.InstanceCheck
         get() = UastBinaryExpressionWithTypeKind.INSTANCE_CHECK
-
-    override fun evaluate() = null
 }

plugins/uast-java/src/org/jetbrains/uast/java/expressions/JavaULiteralExpression.kt

@@ -24,7 +24,7 @@ class JavaULiteralExpression(
         override val psi: PsiLiteralExpression,
         override val parent: UElement
 ) : JavaAbstractUElement(), ULiteralExpression, PsiElementBacked, JavaUElementWithType {
-    override val asString by lz { psi.text }
+    override fun asString() = psi.text
     override fun evaluate() = psi.value
     override val value by lz { evaluate() }
 

plugins/uast-java/src/org/jetbrains/uast/java/expressions/UnknownJavaExpression.kt

@@ -22,6 +22,6 @@ import org.jetbrains.uast.psi.PsiElementBacked
 class UnknownJavaExpression(
         override val psi: PsiElement,
         override val parent: UElement
-) : UExpression, PsiElementBacked, LeafUElement {
+) : UExpression, PsiElementBacked {
     override fun logString() = "[!] UnknownJavaExpression ($psi)"
 }

plugins/uast-java/src/org/jetbrains/uast/java/expressions/javaUCallExpressions.kt

@@ -144,7 +144,6 @@ class JavaArrayInitializerUCallExpression(
         get() = JavaUastCallKinds.ARRAY_INITIALIZER
 
     override fun resolve(context: UastContext) = null
-    override fun evaluate() = null
 }
 
 class JavaAnnotationArrayInitializerUCallExpression(