Remove element from DynamicType.

sdk/lib/_internal/compiler/implementation/resolution/members.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 resolution;
 
 abstract class TreeElements {
   Element get currentElement;
   Setlet<Node> get superUses;
 
@@ skipping 19 matching lines @@
   void setIteratorSelector(ForIn node, Selector selector);
   void setMoveNextSelector(ForIn node, Selector selector);
   void setCurrentSelector(ForIn node, Selector selector);
   void setConstant(Node node, Constant constant);
   Constant getConstant(Node node);
 
   /**
    * Returns [:true:] if [node] is a type literal.
    *
    * Resolution marks this by setting the type on the node to be the
-   * [:Type:] type.
+   * type that the literal refers to.
    */
   bool isTypeLiteral(Send node);
 
+  /// Returns the type that the type literal [node] refers to.
+  DartType getTypeLiteralType(Send node);
+
   /// Register additional dependencies required by [currentElement].
   /// For example, elements that are used by a backend.
   void registerDependency(Element element);
 
   /// Returns a list of nodes that potentially mutate [element] anywhere in its
   /// scope.
   List<Node> getPotentialMutations(VariableElement element);
 
   /// Returns a list of nodes that potentially mutate [element] in [node].
   List<Node> getPotentialMutationsIn(Node node, VariableElement element);
@@ skipping 122 matching lines @@
   }
 
   Constant getConstant(Node node) {
     return constants[node];
   }
 
   bool isTypeLiteral(Send node) {
     return getType(node) != null;
   }
 
+  DartType getTypeLiteralType(Send node) {
+    return getType(node);
+  }
+
   void registerDependency(Element element) {
     if (element == null) return;
     otherDependencies.add(element.implementation);
   }
 
   List<Node> getPotentialMutations(VariableElement element) {
     List<Node> mutations = potentiallyMutated[element];
     if (mutations == null) return const <Node>[];
     return mutations;
   }
@@ skipping 373 matching lines @@
       error(element.modifiers.getStatic(),
             MessageKind.TOP_LEVEL_VARIABLE_DECLARED_STATIC);
     }
     ResolverVisitor visitor = visitorFor(element);
     ResolutionRegistry registry = visitor.registry;
     // TODO(johnniwinther): Share the resolved type between all variables
     // declared in the same declaration.
     if (tree.type != null) {
       element.variables.type = visitor.resolveTypeAnnotation(tree.type);
     } else {
-      element.variables.type = compiler.types.dynamicType;
+      element.variables.type = const DynamicType();
     }
     registry.useElement(tree, element);
 
     Expression initializer = element.initializer;
     Modifiers modifiers = element.modifiers;
     if (initializer != null) {
       // TODO(johnniwinther): Avoid analyzing initializers if
       // [Compiler.analyzeSignaturesOnly] is set.
       visitor.visit(initializer);
     } else if (modifiers.isConst) {
@@ skipping 29 matching lines @@
 
   DartType resolveTypeAnnotation(Element element, TypeAnnotation annotation) {
     DartType type = resolveReturnType(element, annotation);
     if (type.isVoid) {
       error(annotation, MessageKind.VOID_NOT_ALLOWED);
     }
     return type;
   }
 
   DartType resolveReturnType(Element element, TypeAnnotation annotation) {
-    if (annotation == null) return compiler.types.dynamicType;
+    if (annotation == null) return const DynamicType();
     DartType result = visitorFor(element).resolveTypeAnnotation(annotation);
     if (result == null) {
       // TODO(karklose): warning.
-      return compiler.types.dynamicType;
+      return const DynamicType();
     }
     return result;
   }
 
   void resolveRedirectionChain(ConstructorElementX constructor,
                                Spannable node) {
     ConstructorElementX target = constructor;
     InterfaceType targetType;
     List<Element> seen = new List<Element>();
     // Follow the chain of redirections and check for cycles.
@@ skipping 1032 matching lines @@
                                           element.name,
                                           element);
         }
       } else {
         // The caller of this method will create the ErroneousElement for
         // the MalformedType.
         element = null;
       }
     } else {
       String stringValue = typeName.source;
-      if (identical(stringValue, 'dynamic')) {
-        element = compiler.dynamicClass;
-      } else {
-        element = lookupInScope(compiler, typeName, scope, typeName.source);
-      }
+      element = lookupInScope(compiler, typeName, scope, typeName.source);
     }
     return element;
   }
 
   DartType resolveTypeAnnotation(MappingVisitor visitor, TypeAnnotation node,
                                  {bool malformedIsError: false,
                                   bool deferredIsMalformed: true}) {
     ResolutionRegistry registry = visitor.registry;
 
     Identifier typeName;
@@ skipping 18 matching lines @@
       // The type name is of the form [: prefix . identifier :].
       prefixName = send.receiver.asIdentifier();
       typeName = send.selector.asIdentifier();
     } else {
       typeName = node.typeName.asIdentifier();
       if (identical(typeName.source, 'void')) {
         type = const VoidType();
         checkNoTypeArguments(type);
         registry.useType(node, type);
         return type;
+      } else if (identical(typeName.source, 'dynamic')) {
+        type = const DynamicType();
+        checkNoTypeArguments(type);
+        registry.useType(node, type);
+        return type;
       }
     }
 
     Element element = resolveTypeName(prefixName, typeName, visitor.scope,
                                       deferredIsMalformed: deferredIsMalformed);
 
     DartType reportFailureAndCreateType(MessageKind messageKind,
                                         Map messageArguments,
                                         {DartType userProvidedBadType,
                                          Element erroneousElement}) {
@@ skipping 26 matching lines @@
     } else if (element.isErroneous) {
       ErroneousElement erroneousElement = element;
       type = reportFailureAndCreateType(
           erroneousElement.messageKind, erroneousElement.messageArguments,
           erroneousElement: erroneousElement);
     } else if (!element.impliesType) {
       type = reportFailureAndCreateType(
           MessageKind.NOT_A_TYPE, {'node': node.typeName});
     } else {
       bool addTypeVariableBoundsCheck = false;
-      if (identical(element, compiler.dynamicClass)) {
-        type = checkNoTypeArguments(element.computeType(compiler));
-      } else if (element.isClass) {
+      if (element.isClass) {
         ClassElement cls = element;
         // TODO(johnniwinther): [_ensureClassWillBeResolved] should imply
         // [computeType].
         compiler.resolver._ensureClassWillBeResolved(cls);
         element.computeType(compiler);
         var arguments = new LinkBuilder<DartType>();
         bool hasTypeArgumentMismatch = resolveTypeArguments(
             visitor, node, cls.typeVariables, arguments);
         if (hasTypeArgumentMismatch) {
           type = new BadInterfaceType(cls.declaration,
@@ skipping 326 matching lines @@
     } else if (node.isSuper()) {
       if (!inInstanceContext) error(node, MessageKind.NO_SUPER_IN_STATIC);
       if ((ElementCategory.SUPER & allowedCategory) == 0) {
         error(node, MessageKind.INVALID_USE_OF_SUPER);
       }
       return null;
     } else {
       String name = node.source;
       Element element = lookupInScope(compiler, node, scope, name);
       if (Elements.isUnresolved(element) && name == 'dynamic') {
-        element = compiler.dynamicClass;
+        // TODO(johnniwinther): Remove this hack when we can return more complex
+        // objects than [Element] from this method.
+        element = compiler.typeClass;
+        // Set the type to be `dynamic` to mark that this is a type literal.
+        registry.setType(node, const DynamicType());
       }
       element = reportLookupErrorIfAny(element, node, node.source);
       if (element == null) {
         if (!inInstanceContext) {
           element = warnAndCreateErroneousElement(
               node, node.source, MessageKind.CANNOT_RESOLVE,
               {'name': node});
           registry.registerThrowNoSuchMethod();
         }
       } else if (element.isErroneous) {
@@ skipping 451 matching lines @@
               warnAndCreateErroneousElement(node.selector, field.name,
                                             MessageKind.CANNOT_RESOLVE_GETTER);
         }
       } else if (target.isTypeVariable) {
         ClassElement cls = target.enclosingClass;
         assert(enclosingElement.enclosingClass == cls);
         registry.registerClassUsingVariableExpression(cls);
         registry.registerTypeVariableExpression();
         // Set the type of the node to [Type] to mark this send as a
         // type variable expression.
-        registry.setType(node, compiler.typeClass.computeType(compiler));
-        registry.registerTypeLiteral(target);
+        registry.registerTypeLiteral(node, target.computeType(compiler));
       } else if (target.impliesType && (!sendIsMemberAccess || node.isCall)) {
         // Set the type of the node to [Type] to mark this send as a
         // type literal.
-        registry.setType(node, compiler.typeClass.computeType(compiler));
-        registry.registerTypeLiteral(target);
+        DartType type;
+
+        // TODO(johnniwinther): Remove this hack when we can pass more complex
+        // information between methods than resolved elements.
+        if (target == compiler.typeClass && node.receiver == null) {
+          // Potentially a 'dynamic' type literal.
+          type = registry.getType(node.selector);
+        }
+        if (type == null) {
+          type = target.computeType(compiler);
+        }
+        registry.registerTypeLiteral(node, type);
 
         // Don't try to make constants of calls to type literals.
         if (!node.isCall) {
           analyzeConstant(node);
         } else {
           // The node itself is not a constant but we register the selector (the
           // identifier that refers to the class/typedef) as a constant.
           analyzeConstant(node.selector);
         }
       }
@@ skipping 365 matching lines @@
   visitThrow(Throw node) {
     registry.registerThrowExpression();
     visit(node.expression);
   }
 
   visitVariableDefinitions(VariableDefinitions node) {
     DartType type;
     if (node.type != null) {
       type = resolveTypeAnnotation(node.type);
     } else {
-      type = compiler.types.dynamicType;
+      type = const DynamicType();
     }
     VariableList variables = new VariableList.node(node, type);
     VariableDefinitionsVisitor visitor =
         new VariableDefinitionsVisitor(compiler, node, this, variables);
 
     Modifiers modifiers = node.modifiers;
     void reportExtraModifier(String modifier) {
       Node modifierNode;
       for (Link<Node> nodes = modifiers.nodes.nodes;
            !nodes.isEmpty;
@@ skipping 775 matching lines @@
       if (typeNode.bound != null) {
         DartType boundType = typeResolver.resolveTypeAnnotation(
             this, typeNode.bound);
         variableElement.boundCache = boundType;
 
         void checkTypeVariableBound() {
           Link<TypeVariableElement> seenTypeVariables =
               const Link<TypeVariableElement>();
           seenTypeVariables = seenTypeVariables.prepend(variableElement);
           DartType bound = boundType;
-          while (bound.kind == TypeKind.TYPE_VARIABLE) {
+          while (bound.isTypeVariable) {
             TypeVariableElement element = bound.element;
             if (seenTypeVariables.contains(element)) {
               if (identical(element, variableElement)) {
                 // Only report an error on the checked type variable to avoid
                 // generating multiple errors for the same cyclicity.
                 warning(typeNode.name, MessageKind.CYCLIC_TYPE_VARIABLE,
                     {'typeVariableName': variableElement.name});
               }
               break;
             }
@@ skipping 232 matching lines @@
     return element.computeType(compiler);
   }
 
   /// Resolves the mixed type for [mixinNode] and checks that the the mixin type
   /// is a valid, non-blacklisted interface type. The mixin type is returned.
   DartType checkMixinType(TypeAnnotation mixinNode) {
     DartType mixinType = resolveType(mixinNode);
     if (isBlackListed(mixinType)) {
       compiler.reportError(mixinNode,
           MessageKind.CANNOT_MIXIN, {'type': mixinType});
-    } else if (mixinType.kind == TypeKind.TYPE_VARIABLE) {
+    } else if (mixinType.isTypeVariable) {
       compiler.reportError(mixinNode, MessageKind.CLASS_NAME_EXPECTED);
-    } else if (mixinType.kind == TypeKind.MALFORMED_TYPE) {
+    } else if (mixinType.isMalformed) {
       compiler.reportError(mixinNode, MessageKind.CANNOT_MIXIN_MALFORMED);
     }
     return mixinType;
   }
 
   DartType visitNamedMixinApplication(NamedMixinApplication node) {
     invariant(node, element != null);
     invariant(element, element.resolutionState == STATE_STARTED,
         message: () => 'cyclic resolution of class $element');
 
@@ skipping 94 matching lines @@
         node.asNamedMixinApplication();
     Link<DartType> interfaces = (namedMixinApplication != null)
         ? resolveInterfaces(namedMixinApplication.interfaces,
                             namedMixinApplication.superclass)
         : const Link<DartType>();
 
     // The class that is the result of a mixin application implements
     // the interface of the class that was mixed in so always prepend
     // that to the interface list.
     if (mixinApplication.interfaces == null) {
-      if (mixinType.kind == TypeKind.INTERFACE) {
+      if (mixinType.isInterfaceType) {
         // Avoid malformed types in the interfaces.
         interfaces = interfaces.prepend(mixinType);
       }
       mixinApplication.interfaces = interfaces;
     } else {
       assert(invariant(mixinApplication,
           mixinApplication.hasIncompleteHierarchy));
     }
 
     ClassElement superclass = supertype.element;
@@ skipping 169 matching lines @@
       supertypes = supertypes.tail;
     }
   }
 
   isBlackListed(DartType type) {
     LibraryElement lib = element.library;
     return
       !identical(lib, compiler.coreLibrary) &&
       !identical(lib, compiler.jsHelperLibrary) &&
       !identical(lib, compiler.interceptorsLibrary) &&
-      (identical(type, compiler.types.dynamicType) ||
+      (type.isDynamic ||
        identical(type.element, compiler.boolClass) ||
        identical(type.element, compiler.numClass) ||
        identical(type.element, compiler.intClass) ||
        identical(type.element, compiler.doubleClass) ||
        identical(type.element, compiler.stringClass) ||
        identical(type.element, compiler.nullClass));
   }
 }
 
 class ClassSupertypeResolver extends CommonResolverVisitor {
@@ skipping 220 matching lines @@
         // The unnamed constructor may not exist, so [e] may become unresolved.
         element = resolveConstructor(cls, diagnosticNode, '');
       } else {
         element = failOrReturnErroneousElement(
             element, diagnosticNode, element.name, MessageKind.NOT_A_TYPE,
             {'node': diagnosticNode});
       }
     }
     if (type == null) {
       if (Elements.isUnresolved(element)) {
-        type = compiler.types.dynamicType;
+        type = const DynamicType();
       } else {
         type = element.enclosingClass.rawType;
       }
     }
     resolver.registry.setType(expression, type);
     return element;
   }
 
   Element visitTypeAnnotation(TypeAnnotation node) {
     assert(invariant(node, type == null));
@@ skipping 86 matching lines @@
   TreeElements _treeElements;
 
   bool get hasTreeElements => _treeElements != null;
 
   TreeElements get treeElements {
     assert(invariant(this, _treeElements !=null,
         message: "TreeElements have not been computed for $this."));
     return _treeElements;
   }
 }