Move dart2js from sdk/lib/_internal/compiler to pkg/compiler

sdk/lib/_internal/compiler/implementation/scanner/class_element_parser.dart

-// Copyright (c) 2011, 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 scanner;
-
-class ClassElementParser extends PartialParser {
-  ClassElementParser(Listener listener) : super(listener);
-
-  Token parseClassBody(Token token) => fullParseClassBody(token);
-}
-
-class PartialClassElement extends ClassElementX with PartialElement {
-  ClassNode cachedNode;
-
-  PartialClassElement(String name,
-                      Token beginToken,
-                      Token endToken,
-                      Element enclosing,
-                      int id)
-      : super(name, enclosing, id, STATE_NOT_STARTED) {
-    this.beginToken = beginToken;
-    this.endToken = endToken;
-  }
-
-  void set supertypeLoadState(int state) {
-    assert(state == supertypeLoadState + 1);
-    assert(state <= STATE_DONE);
-    super.supertypeLoadState = state;
-  }
-
-  void set resolutionState(int state) {
-    assert(state == resolutionState + 1);
-    assert(state <= STATE_DONE);
-    super.resolutionState = state;
-  }
-
-  bool get hasNode => cachedNode != null;
-
-  ClassNode get node {
-    assert(invariant(this, cachedNode != null,
-        message: "Node has not been computed for $this."));
-    return cachedNode;
-  }
-
-  ClassNode parseNode(Compiler compiler) {
-    if (cachedNode != null) return cachedNode;
-    compiler.withCurrentElement(this, () {
-      compiler.parser.measure(() {
-        MemberListener listener = new MemberListener(compiler, this);
-        Parser parser = new ClassElementParser(listener);
-        Token token = parser.parseTopLevelDeclaration(beginToken);
-        assert(identical(token, endToken.next));
-        cachedNode = listener.popNode();
-        assert(invariant(beginToken, listener.nodes.isEmpty,
-            message: "Non-empty listener stack: ${listener.nodes}"));
-      });
-      compiler.patchParser.measure(() {
-        if (isPatched) {
-          // TODO(lrn): Perhaps extract functionality so it doesn't
-          // need compiler.
-          compiler.patchParser.parsePatchClassNode(patch);
-        }
-      });
-    });
-    return cachedNode;
-  }
-
-  Token get position => beginToken;
-
-  // TODO(johnniwinther): Ensure that modifiers are always available.
-  Modifiers get modifiers =>
-      cachedNode != null ? cachedNode.modifiers : Modifiers.EMPTY;
-
-  accept(ElementVisitor visitor) => visitor.visitClassElement(this);
-}
-
-class MemberListener extends NodeListener {
-  final ClassElement enclosingElement;
-
-  MemberListener(DiagnosticListener listener,
-                 Element enclosingElement)
-      : this.enclosingElement = enclosingElement,
-        super(listener, enclosingElement.compilationUnit);
-
-  bool isConstructorName(Node nameNode) {
-    if (enclosingElement == null ||
-        enclosingElement.kind != ElementKind.CLASS) {
-      return false;
-    }
-    String name;
-    if (nameNode.asIdentifier() != null) {
-      name = nameNode.asIdentifier().source;
-    } else {
-      Send send = nameNode.asSend();
-      name = send.receiver.asIdentifier().source;
-    }
-    return enclosingElement.name == name;
-  }
-
-  // TODO(johnniwinther): Remove this method.
-  String getMethodNameHack(Node methodName) {
-    Send send = methodName.asSend();
-    if (send == null) {
-      if (isConstructorName(methodName)) return '';
-      return methodName.asIdentifier().source;
-    }
-    Identifier receiver = send.receiver.asIdentifier();
-    Identifier selector = send.selector.asIdentifier();
-    Operator operator = selector.asOperator();
-    if (operator != null) {
-      assert(identical(receiver.source, 'operator'));
-      // TODO(ahe): It is a hack to compare to ')', but it beats
-      // parsing the node.
-      bool isUnary = identical(operator.token.next.next.stringValue, ')');
-      return Elements.constructOperatorName(operator.source, isUnary);
-    } else {
-      if (receiver == null || receiver.source != enclosingElement.name) {
-        listener.reportError(send.receiver,
-                                 MessageKind.INVALID_CONSTRUCTOR_NAME,
-                                 {'name': enclosingElement.name});
-      }
-      return selector.source;
-    }
-  }
-
-  void endMethod(Token getOrSet, Token beginToken, Token endToken) {
-    super.endMethod(getOrSet, beginToken, endToken);
-    FunctionExpression method = popNode();
-    pushNode(null);
-    bool isConstructor = isConstructorName(method.name);
-    String name = getMethodNameHack(method.name);
-    Element memberElement;
-    if (isConstructor) {
-      if (getOrSet != null) {
-        recoverableError(getOrSet, 'illegal modifier');
-      }
-      memberElement = new PartialConstructorElement(
-          name, beginToken, endToken,
-          ElementKind.GENERATIVE_CONSTRUCTOR,
-          method.modifiers,
-          enclosingElement);
-    } else {
-      ElementKind kind = ElementKind.FUNCTION;
-      if (getOrSet != null) {
-        kind = (identical(getOrSet.stringValue, 'get'))
-               ? ElementKind.GETTER : ElementKind.SETTER;
-      }
-      memberElement =
-          new PartialFunctionElement(name, beginToken, getOrSet, endToken,
-                                     kind, method.modifiers, enclosingElement,
-                                     !method.hasBody());
-    }
-    addMember(memberElement);
-  }
-
-  void endFactoryMethod(Token beginToken, Token endToken) {
-    super.endFactoryMethod(beginToken, endToken);
-    FunctionExpression method = popNode();
-    pushNode(null);
-    String name = getMethodNameHack(method.name);
-    Identifier singleIdentifierName = method.name.asIdentifier();
-    if (singleIdentifierName != null && singleIdentifierName.source == name) {
-      if (name != enclosingElement.name) {
-        listener.reportError(singleIdentifierName,
-                                 MessageKind.INVALID_UNNAMED_CONSTRUCTOR_NAME,
-                                 {'name': enclosingElement.name});
-      }
-    }
-    ElementKind kind = ElementKind.FUNCTION;
-    Element memberElement = new PartialConstructorElement(
-        name, beginToken, endToken,
-        ElementKind.FUNCTION,
-        method.modifiers,
-        enclosingElement);
-    addMember(memberElement);
-  }
-
-  void endFields(int count, Token beginToken, Token endToken) {
-    bool hasParseError = memberErrors.head;
-    super.endFields(count, beginToken, endToken);
-    VariableDefinitions variableDefinitions = popNode();
-    Modifiers modifiers = variableDefinitions.modifiers;
-    pushNode(null);
-    void buildFieldElement(Identifier name, VariableList fields) {
-      Element element =
-          new FieldElementX(name, enclosingElement, fields);
-      addMember(element);
-    }
-    buildFieldElements(modifiers, variableDefinitions.definitions,
-                       enclosingElement,
-                       buildFieldElement, beginToken, endToken,
-                       hasParseError);
-  }
-
-  void endInitializer(Token assignmentOperator) {
-    pushNode(null); // Super expects an expression, but
-                    // ClassElementParser just skips expressions.
-    super.endInitializer(assignmentOperator);
-  }
-
-  void endInitializers(int count, Token beginToken, Token endToken) {
-    pushNode(null);
-  }
-
-  void addMember(Element memberElement) {
-    for (Link link = metadata; !link.isEmpty; link = link.tail) {
-      memberElement.addMetadata(link.head);
-    }
-    metadata = const Link<MetadataAnnotation>();
-    enclosingElement.addMember(memberElement, listener);
-  }
-
-  void endMetadata(Token beginToken, Token periodBeforeName, Token endToken) {
-    popNode(); // Discard arguments.
-    if (periodBeforeName != null) {
-      popNode(); // Discard name.
-    }
-    popNode(); // Discard node (Send or Identifier).
-    pushMetadata(new PartialMetadataAnnotation(beginToken, endToken));
-  }
-}