FIR/UAST: commonize KotlinEvaluatableUElement

plugins/uast-kotlin-base/src/org/jetbrains/uast/kotlin/BaseKotlinUastResolveProviderService.kt

@@ -19,4 +19,6 @@ interface BaseKotlinUastResolveProviderService {
     fun resolveToDeclaration(ktExpression: KtExpression): PsiElement?
 
     fun getExpressionType(uExpression: UExpression): PsiType?
+
+    fun evaluate(uExpression: UExpression): Any?
 }

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

@@ -0,0 +1,16 @@
+/*
+ * 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.uast.UExpression
+
+interface KotlinEvaluatableUElement : UExpression {
+    val baseResolveProviderService: BaseKotlinUastResolveProviderService
+
+    override fun evaluate(): Any? {
+        return baseResolveProviderService.evaluate(this)
+    }
+}