Implement prefixes in NewExpression.

dart/frog/leg/ssa/closure.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.
 
 class ClosureFieldElement extends Element {
   ClosureFieldElement(SourceString name, ClassElement enclosing)
       : super(name, ElementKind.FIELD, enclosing);
 
   bool isInstanceMember() => true;
   bool isAssignable() => false;
@@ skipping 52 matching lines @@
               this.callElement,
               this.thisElement)
       : this.freeVariableMapping = new Map<Element, Element>(),
         this.capturedFieldMapping = new Map<Element, Element>(),
         this.capturingScopes = new Map<Node, ClosureScope>(),
         this.usedVariablesInTry = new Set<Element>();
 
   bool isClosure() => closureElement !== null;
 }
 
-Map<Node, ClosureData> _closureDataCache;
-Map<Node, ClosureData> get closureDataCache() {
-  if (_closureDataCache === null) {
-    _closureDataCache = new HashMap<Node, ClosureData>();
-  }
-  return _closureDataCache;
-}
-
 class ClosureTranslator extends AbstractVisitor {
   final Compiler compiler;
   final TreeElements elements;
   int boxCounter = 0;
   bool inTryCatchOrFinally = false;
 
   // Map of captured variables. Initially they will map to themselves. If
   // a variable needs to be boxed then the scope declaring the variable
   // will update this mapping.
   Map<Element, Element> capturedVariableMapping;
   // List of encountered closures.
   List<FunctionExpression> closures;
 
   // The variables that have been declared in the current scope.
   List<Element> scopeVariables;
 
   FunctionElement currentFunctionElement;
   // The closureData of the currentFunctionElement.
   ClosureData closureData;
 
   bool insideClosure = false;
 
   ClosureTranslator(this.compiler, this.elements)
       : capturedVariableMapping = new Map<Element, Element>(),
         closures = <FunctionExpression>[];
 
   ClosureData translate(Node node) {
     // Closures have already been analyzed when visiting the surrounding
     // method/function. This also shortcuts for bailout functions.
-    ClosureData cached = closureDataCache[node];
+    ClosureData cached = compiler.closureDataCache[node];
     if (cached !== null) return cached;
 
     visit(node);
     // When variables need to be boxed their [capturedVariableMapping] is
     // updated, but we delay updating the similar freeVariableMapping in the
     // closure datas that capture these variables.
     // The closures don't have their fields (in the closure class) set, either.
     updateClosures();
 
-    return closureDataCache[node];
+    return compiler.closureDataCache[node];
   }
 
   // This function runs through all of the existing closures and updates their
   // free variables to the boxed value. It also adds the field-elements to the
   // class representing the closure. At the same time it fills the
   // [capturedFieldMapping].
   void updateClosures() {
     for (FunctionExpression closure in closures) {
       // The captured variables that need to be stored in a field of the closure
       // class.
       Set<Element> fieldCaptures = new Set<Element>();
-      ClosureData data = closureDataCache[closure];
+      ClosureData data = compiler.closureDataCache[closure];
       Map<Element, Element> freeVariableMapping = data.freeVariableMapping;
       // We get a copy of the keys and iterate over it, to avoid modifications
       // to the map while iterating over it.
       freeVariableMapping.getKeys().forEach((Element fromElement) {
         assert(fromElement == freeVariableMapping[fromElement]);
         Element updatedElement = capturedVariableMapping[fromElement];
         assert(updatedElement !== null);
         if (fromElement == updatedElement) {
           assert(freeVariableMapping[fromElement] == updatedElement);
           assert(Elements.isLocal(updatedElement));
@@ skipping 227 matching lines @@
       declareLocal(element);
     }
 
     // TODO(ahe): This is problematic. The backend should not repeat
     // the work of the resolver. It is the resolver's job to create
     // parameters, etc. Other phases should only visit statements.
     node.visitChildren(this);
 
     attachCapturedScopeVariables(node);
 
-    closureDataCache[node] = closureData;
+    compiler.closureDataCache[node] = closureData;
 
     ClosureData savedClosureData = closureData;
     bool savedInsideClosure = insideClosure;
 
     // Restore old values.
     scopeVariables = oldScopeVariables;
     insideClosure = oldInsideClosure;
     closureData = oldClosureData;
     currentFunctionElement = oldFunctionElement;
 
@@ skipping 18 matching lines @@
     // TODO(ngeoffray): implement finer grain state.
     inTryCatchOrFinally = true;
     node.visitChildren(this);
     inTryCatchOrFinally = false;
   }
 
   visitLiteralMap(LiteralMap node) {
     // TODO(ahe): Remove this method.
   }
 }