Begin to compute constant expressions in resolution.

pkg/compiler/lib/src/compiler.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of dart2js;
 
 /**
  * If true, print a warning for each method that was resolved, but not
  * compiled.
  */
@@ skipping 2402 matching lines @@
   @override
   InterfaceType get objectType => objectClass.computeType(compiler);
 
   @override
   InterfaceType get boolType => boolClass.computeType(compiler);
 
   @override
   InterfaceType get doubleType => doubleClass.computeType(compiler);
 
   @override
-  InterfaceType get functionType =>  functionClass.computeType(compiler);
+  InterfaceType get functionType => functionClass.computeType(compiler);
 
   @override
   InterfaceType get intType => intClass.computeType(compiler);
 
   @override
-  InterfaceType listType([DartType elementType = const DynamicType()]) {
-    return listClass.computeType(compiler).createInstantiation([elementType]);
+  InterfaceType listType([DartType elementType]) {
+    InterfaceType type = listClass.computeType(compiler);
+    if (elementType == null) {
+      return listClass.rawType;
+    }
+    return type.createInstantiation([elementType]);
   }
 
   @override
-  InterfaceType mapType([DartType keyType = const DynamicType(),
-                         DartType valueType = const DynamicType()]) {
-    return mapClass.computeType(compiler)
-        .createInstantiation([keyType, valueType]);
+  InterfaceType mapType([DartType keyType,
+                         DartType valueType]) {
+    InterfaceType type = mapClass.computeType(compiler);
+    if (keyType == null && valueType == null) {
+      return mapClass.rawType;
+    } else if (keyType == null) {
+      keyType = const DynamicType();
+    } else if (valueType == null) {
+      valueType = const DynamicType();
+    }
+    return type.createInstantiation([keyType, valueType]);
   }
 
   @override
   InterfaceType get nullType => nullClass.computeType(compiler);
 
   @override
   InterfaceType get numType => numClass.computeType(compiler);
 
   @override
   InterfaceType get stringType => stringClass.computeType(compiler);
 
   @override
+  InterfaceType get symbolType => symbolClass.computeType(compiler);
+
+  @override
   InterfaceType get typeType => typeClass.computeType(compiler);
 
   @override
-  InterfaceType iterableType([DartType elementType = const DynamicType()]) {
-    return iterableClass.computeType(compiler)
-        .createInstantiation([elementType]);
+  InterfaceType iterableType([DartType elementType]) {
+    InterfaceType type = iterableClass.computeType(compiler);
+    if (elementType == null) {
+      return iterableClass.rawType;
+    }
+    return type.createInstantiation([elementType]);
   }
 
   @override
-  InterfaceType futureType([DartType elementType = const DynamicType()]) {
-    return futureClass.computeType(compiler).createInstantiation([elementType]);
+  InterfaceType futureType([DartType elementType]) {
+    InterfaceType type = futureClass.computeType(compiler);
+    if (elementType == null) {
+      return futureClass.rawType;
+    }
+    return type.createInstantiation([elementType]);
   }
 
   @override
-  InterfaceType streamType([DartType elementType = const DynamicType()]) {
-    return streamClass.computeType(compiler).createInstantiation([elementType]);
+  InterfaceType streamType([DartType elementType]) {
+    InterfaceType type = streamClass.computeType(compiler);
+    if (elementType == null) {
+      return streamClass.rawType;
+    }
+    return type.createInstantiation([elementType]);
   }
 }
 
 typedef void InternalErrorFunction(Spannable location, String message);