Support builtin properties in ConstantExpressionEvaluator

compiler/frontend/src/org/jetbrains/kotlin/resolve/constants/evaluate/ConstantExpressionEvaluator.kt

@@ -565,6 +565,11 @@ private class ConstantExpressionEvaluatorVisitor(
             return evaluateCall(calleeExpression, receiverExpression, expectedType)
         }
 
+        if (selectorExpression is JetSimpleNameExpression) {
+            val result = evaluateCall(selectorExpression, expression.receiverExpression, expectedType)
+            if (result != null) return result
+        }
+
         // MyEnum.A, Integer.MAX_VALUE
         if (selectorExpression != null) {
             return evaluate(selectorExpression, expectedType)

compiler/frontend/src/org/jetbrains/kotlin/resolve/constants/evaluate/OperationsMapGenerated.kt

@@ -98,6 +98,7 @@ internal val unaryOperations: HashMap<UnaryOperationKey<*>, Pair<Function1<Any?,
     unaryOperation(SHORT, "toLong", { a -> a.toLong() }, emptyUnaryFun),
     unaryOperation(SHORT, "toShort", { a -> a.toShort() }, emptyUnaryFun),
     unaryOperation(SHORT, "toString", { a -> a.toString() }, emptyUnaryFun),
+    unaryOperation(STRING, "length", { a -> a.length() }, emptyUnaryFun),
     unaryOperation(STRING, "toString", { a -> a.toString() }, emptyUnaryFun)
 )
 

compiler/testData/evaluate/constant/strings.kt

@@ -35,4 +35,4 @@ val prop9 = "a" + "b"
 val prop10 = prop9 + "b"
 
 // val prop11: 6
-val prop11 = "kotlin".length()
+val prop11 = "kotlin".length