fixes #192, encode dynamic info in checker

lib/src/info.dart

 // Copyright (c) 2015, 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.
 
 /// Defines static information collected by the type checker and used later by
 /// emitters to generate code.
 library dev_compiler.src.info;
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
@@ skipping 106 matching lines @@
   DartType get baseType => rules.getStaticType(node);
   DartType get staticType => convertedType;
 
   // safe iff this cannot throw
   bool get safe => false;
 
   Level get level => safe ? Level.CONFIG : Level.INFO;
 
   String get description => '${this.runtimeType}: $baseType to $convertedType';
 
-  static const String _propertyName = 'dev_compiler.Conversion';
+  static const String _propertyName = 'dev_compiler.src.info.CoercionInfo';
 
   /// Gets the coercion info associated with this node.
   static CoercionInfo get(AstNode node) => node.getProperty(_propertyName);
 
   /// Sets the coercion info associated with this node.
   static CoercionInfo set(AstNode node, CoercionInfo info) {
     node.setProperty(_propertyName, info);
     return info;
   }
 }
@@ skipping 200 matching lines @@
       : super._internal(rules, expression, type);
 }
 
 class DynamicInvoke extends CoercionInfo {
   DynamicInvoke(TypeRules rules, Expression expression)
       : super(rules, expression);
 
   DartType get convertedType => rules.provider.dynamicType;
   String get message => '$node requires dynamic invoke';
   Level get level => Level.INFO;
+
+  static const String _propertyName = 'dev_compiler.src.info.DynamicInvoke';
+
+  /// Whether this [node] is the target of a dynamic operation.
+  static bool get(AstNode node) {
+    var value = node.getProperty(_propertyName);
+    return value != null ? value : false;
+  }
+
+  /// Sets whether this node is the target of a dynamic operation.
+  static bool set(AstNode node, bool value) {
+    // Free the storage for things that aren't dynamic.
+    if (value == false) value = null;
+    node.setProperty(_propertyName, value);
+    return value;
+  }
 }
 
 abstract class StaticError extends StaticInfo {
   final AstNode node;
 
   StaticError(this.node);
 
   Level get level => Level.SEVERE;
 }
 
@@ skipping 160 matching lines @@
     var isError = severity == analyzer.ErrorSeverity.WARNING;
     var level = isError ? Level.SEVERE : Level.WARNING;
     int begin = error.offset;
     int end = begin + error.length;
     return new AnalyzerError(error.message, level, begin, end);
   }
 
   const AnalyzerError(String message, Level level, int begin, int end)
       : super(message, level, begin, end);
 }