Add annotation for default parameter value

core/util.runtime/src/org/jetbrains/kotlin/utils/numbers.kt

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2010-2017 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlin.utils
+
+data class NumberWithRadix(val number: String, val radix: Int)
+
+fun extractRadix(value: String): NumberWithRadix = when {
+    value.startsWith("0x") || value.startsWith("0X") -> NumberWithRadix(value.substring(2), 16)
+    value.startsWith("0b") || value.startsWith("0B") -> NumberWithRadix(value.substring(2), 2)
+    else -> NumberWithRadix(value, 10)
+}