FIR/UAST: commonize labeled expression

plugins/uast-kotlin-base/src/org/jetbrains/uast/kotlin/expressions/KotlinULabeledExpression.kt

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.uast.kotlin
+
+import org.jetbrains.kotlin.psi.KtLabeledExpression
+import org.jetbrains.uast.UElement
+import org.jetbrains.uast.UIdentifier
+import org.jetbrains.uast.ULabeledExpression
+
+class KotlinULabeledExpression(
+    override val sourcePsi: KtLabeledExpression,
+    givenParent: UElement?
+) : KotlinAbstractUExpression(givenParent), ULabeledExpression {
+    override val label: String
+        get() = sourcePsi.getLabelName().orAnonymous("label")
+
+    override val labelIdentifier: UIdentifier?
+        get() = sourcePsi.getTargetLabel()?.let { KotlinUIdentifier(it, this) }
+
+    override val expression by lz {
+        baseResolveProviderService.baseKotlinConverter.convertOrEmpty(sourcePsi.baseExpression, this)
+    }
+}

plugins/uast-kotlin-base/src/org/jetbrains/uast/kotlin/internal/baseKotlinInternalUastUtils.kt

@@ -17,6 +17,9 @@ import java.util.function.Supplier
 
 typealias BaseResolveProviderServiceSupplier = Supplier<BaseKotlinUastResolveProviderService>
 
+@Suppress("NOTHING_TO_INLINE")
+inline fun String?.orAnonymous(kind: String = ""): String = this ?: "<anonymous" + (if (kind.isNotBlank()) " $kind" else "") + ">"
+
 fun <T> lz(initializer: () -> T) =
     lazy(LazyThreadSafetyMode.SYNCHRONIZED, initializer)