JS backend: added the ability to add metadata to js nodes.

js/js.dart-ast/src/com/google/dart/compiler/backend/js/ast/AbstractNode.java

@@ -1,13 +1,20 @@
 package com.google.dart.compiler.backend.js.ast;
 
 import com.google.dart.compiler.backend.js.JsToStringGenerationVisitor;
+import com.google.dart.compiler.backend.js.ast.metadata.HasMetadata;
 import com.google.dart.compiler.util.TextOutputImpl;
 
-abstract class AbstractNode implements JsNode {
+abstract class AbstractNode extends HasMetadata implements JsNode {
     @Override
     public String toString() {
         TextOutputImpl out = new TextOutputImpl();
         new JsToStringGenerationVisitor(out).accept(this);
         return out.toString();
     }
-}
+
+    protected <T extends HasMetadata> T withMetadataFrom(T other) {
+        this.copyMetadataFrom(other);
+        //noinspection unchecked
+        return (T) this;
+    }
+}

js/js.dart-ast/src/com/google/dart/compiler/backend/js/ast/JsName.java

@@ -4,13 +4,14 @@
 
 package com.google.dart.compiler.backend.js.ast;
 
+import com.google.dart.compiler.backend.js.ast.metadata.HasMetadata;
 import com.google.dart.compiler.common.Symbol;
 import org.jetbrains.annotations.NotNull;
 
 /**
  * An abstract base class for named JavaScript objects.
  */
-public class JsName implements Symbol {
+public class JsName extends HasMetadata implements Symbol {
   private final JsScope enclosing;
   private final String ident;
   private JsNode staticRef = null;

js/js.dart-ast/src/com/google/dart/compiler/backend/js/ast/metadata/HasMetadata.kt

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2010-2014 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 com.google.dart.compiler.backend.js.ast.metadata
+
+abstract class HasMetadata {
+    private val metadata: MutableMap<String, Any?> = hashMapOf()
+
+    fun <T> getData(key: String): T {
+        [suppress("UNCHECKED_CAST")]
+        return metadata[key] as T
+    }
+
+    fun <T> setData(key: String, value: T) {
+        metadata[key] = value
+    }
+
+    fun hasData(key: String): Boolean {
+        return metadata.containsKey(key)
+    }
+
+    fun removeData(key: String) {
+        metadata.remove(key)
+    }
+
+    fun copyMetadataFrom(other: HasMetadata) {
+        metadata.putAll(other.metadata)
+    }
+}

js/js.dart-ast/src/com/google/dart/compiler/backend/js/ast/metadata/MetadataProperty.kt

@@ -0,0 +1,28 @@
+/*
+ * Copyright 2010-2014 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 com.google.dart.compiler.backend.js.ast.metadata
+
+private class MetadataProperty<in T : HasMetadata, R>(val default: R) {
+    fun get(thisRef: T, desc: PropertyMetadata): R {
+        if (!thisRef.hasData(desc.name)) return default
+        return thisRef.getData<R>(desc.name)
+    }
+
+    fun set(thisRef: T, desc: PropertyMetadata, value: R) {
+        thisRef.setData(desc.name, value)
+    }
+}

js/js.dart-ast/src/com/google/dart/compiler/backend/js/ast/metadata/metadataProperties.kt

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2010-2014 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 com.google.dart.compiler.backend.js.ast.metadata
+
+import com.google.dart.compiler.backend.js.ast.*
+import org.jetbrains.jet.lang.types.lang.InlineStrategy
+import kotlin.properties.Delegates
+
+public var JsName.staticRef: JsNode? by MetadataProperty(default = null)
+
+public var JsInvocation.inlineStrategy: InlineStrategy? by MetadataProperty(default = null)
+
+public var JsFunction.isLocal: Boolean by MetadataProperty(default = false)
+
+public var JsParameter.hasDefaultValue: Boolean by MetadataProperty(default = false)
+