validate identifier names

compiler/frontend/src/org/jetbrains/jet/lang/resolve/NameUtils.java

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2010-2012 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.jet.lang.resolve;
+
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * @author Stepan Koltsov
+ */
+public class NameUtils {
+
+    public static boolean isValidIdentified(@NotNull String name) {
+        return name.length() > 0 && !name.startsWith("<");
+    }
+
+    public static void requireIdentifier(@NotNull String name) {
+        if (!isValidIdentified(name)) {
+            throw new IllegalArgumentException("invalid identifier: " + name);
+        }
+    }
+
+}

js/js.translator/src/org/jetbrains/k2js/translate/context/NamingScope.java

@@ -19,6 +19,7 @@ package org.jetbrains.k2js.translate.context;
 import com.google.dart.compiler.backend.js.ast.JsName;
 import com.google.dart.compiler.backend.js.ast.JsScope;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.jet.lang.resolve.NameUtils;
 import org.jetbrains.k2js.translate.utils.JsAstUtils;
 
 /**
@@ -54,6 +55,7 @@ public final class NamingScope {
 
     @NotNull
         /*package*/ JsName declareUnobfuscatableName(@NotNull String name) {
+        NameUtils.requireIdentifier(name);
         JsName declaredName = scope.declareName(name);
         declaredName.setObfuscatable(false);
         return declaredName;