Compute all default values of parameters.

pkg/analyzer/lib/src/generated/constant.dart

 // Copyright (c) 2014, 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.
 
 library analyzer.src.generated.constant;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
@@ skipping 171 matching lines @@
   }
 
   @override
   SuperConstructorInvocation visitSuperConstructorInvocation(
       SuperConstructorInvocation node) {
     SuperConstructorInvocation invocation =
         super.visitSuperConstructorInvocation(node);
     invocation.staticElement = node.staticElement;
     return invocation;
   }
+
+  @override
+  TypeName visitTypeName(TypeName node) {
+    TypeName typeName = super.visitTypeName(node);
+    typeName.type = node.type;
+    return typeName;
+  }
 }
 
 /**
  * Helper class encapsulating the methods for evaluating constants and
  * constant instance creation expressions.
  */
 class ConstantEvaluationEngine {
   /**
    * Parameter to "fromEnvironment" methods that denotes the default value.
    */
@@ skipping 1075 matching lines @@
       ConstructorElement element = node.element;
       if (element != null) {
         constantsToCompute.add(element);
         constantsToCompute.addAll(element.parameters);
       }
     }
     return null;
   }
 
   @override
+  Object visitDefaultFormalParameter(DefaultFormalParameter node) {
+    super.visitDefaultFormalParameter(node);
+    Expression defaultValue = node.defaultValue;
+    if (defaultValue != null && node.element != null) {
+      constantsToCompute.add(node.element);
+    }
+    return null;
+  }
+
+  @override
   Object visitVariableDeclaration(VariableDeclaration node) {
     super.visitVariableDeclaration(node);
     Expression initializer = node.initializer;
     VariableElement element = node.element;
     if (initializer != null &&
         (node.isConst ||
             treatFinalInstanceVarAsConst &&
                 element is FieldElement &&
                 node.isFinal &&
                 !element.isStatic)) {
@@ skipping 4083 matching lines @@
       return BoolState.from(_element == rightElement);
     } else if (rightOperand is DynamicState) {
       return BoolState.UNKNOWN_VALUE;
     }
     return BoolState.FALSE_STATE;
   }
 
   @override
   String toString() => _element == null ? "-unknown-" : _element.name;
 }