Move parser and token related libraries into their own subfolder.

pkg/compiler/lib/src/scanner/class_element_parser.dart

Index: pkg/compiler/lib/src/scanner/class_element_parser.dart
diff --git a/pkg/compiler/lib/src/scanner/class_element_parser.dart b/pkg/compiler/lib/src/scanner/class_element_parser.dart
deleted file mode 100644
index e1669befaf0ed70818655591edacbee73206e052..0000000000000000000000000000000000000000
--- a/pkg/compiler/lib/src/scanner/class_element_parser.dart
+++ /dev/null
@@ -1,286 +0,0 @@
-// 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.
-
-library dart2js.parser.classes;
-
-import '../compiler.dart' show
-    Compiler;
-import '../diagnostics/diagnostic_listener.dart' show
-    DiagnosticListener;
-import '../diagnostics/messages.dart' show
-    MessageKind;
-import '../diagnostics/invariant.dart' show
-    invariant;
-import '../elements/elements.dart' show
-    CompilationUnitElement,
-    Element,
-    ElementKind,
-    Elements,
-    MetadataAnnotation,
-    STATE_NOT_STARTED,
-    STATE_DONE;
-import '../elements/modelx.dart' show
-    ClassElementX,
-    ElementX,
-    FieldElementX,
-    VariableList;
-import '../elements/visitor.dart' show
-    ElementVisitor;
-import '../tree/tree.dart';
-import '../util/util.dart' show
-    Link;
-
-import 'listener.dart' show
-    Listener,
-    NodeListener,
-    ParserError,
-    PartialConstructorElement,
-    PartialElement,
-    PartialFunctionElement,
-    PartialMetadataAnnotation;
-import 'parser.dart' show
-    Parser;
-import 'partial_parser.dart' show
-    PartialParser;
-import 'token.dart' show
-    Token;
-
-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 == STATE_NOT_STARTED || state == supertypeLoadState + 1);
-    assert(state <= STATE_DONE);
-    super.supertypeLoadState = state;
-  }
-
-  void set resolutionState(int state) {
-    assert(state == STATE_NOT_STARTED || 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);
-        try {
-          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}"));
-        } on ParserError {
-          // TODO(ahe): Often, a ParserError is thrown while parsing the class
-          // body. This means that the stack actually contains most of the
-          // information synthesized below. Consider rewriting the parser so
-          // endClassDeclaration is called before parsing the class body.
-          Identifier name = new Identifier(findMyName(beginToken));
-          NodeList typeParameters = null;
-          Node supertype = null;
-          NodeList interfaces = listener.makeNodeList(0, null, null, ",");
-          Token extendsKeyword = null;
-          NodeList body = listener.makeNodeList(0, beginToken, endToken, null);
-          cachedNode = new ClassNode(
-              Modifiers.EMPTY, name, typeParameters, supertype, interfaces,
-              beginToken, extendsKeyword, body, endToken);
-          hasParseError = true;
-        }
-      });
-      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, arg) {
-    return visitor.visitClassElement(this, arg);
-  }
-
-  PartialClassElement copyWithEnclosing(CompilationUnitElement enclosing) {
-    return new PartialClassElement(name, beginToken, endToken, enclosing, id);
-  }
-}
-
-class MemberListener extends NodeListener {
-  final ClassElementX enclosingClass;
-
-  MemberListener(DiagnosticListener listener,
-                 ClassElementX enclosingElement)
-      : this.enclosingClass = enclosingElement,
-        super(listener, enclosingElement.compilationUnit);
-
-  bool isConstructorName(Node nameNode) {
-    if (enclosingClass == null ||
-        enclosingClass.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 enclosingClass.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 != enclosingClass.name) {
-        listener.reportError(send.receiver,
-                                 MessageKind.INVALID_CONSTRUCTOR_NAME,
-                                 {'name': enclosingClass.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,
-          enclosingClass);
-    } else {
-      memberElement = new PartialFunctionElement(
-          name, beginToken, getOrSet, endToken,
-          method.modifiers, enclosingClass, hasBody: 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 != enclosingClass.name) {
-        listener.reportError(singleIdentifierName,
-                                 MessageKind.INVALID_UNNAMED_CONSTRUCTOR_NAME,
-                                 {'name': enclosingClass.name});
-      }
-    }
-    Element memberElement = new PartialConstructorElement(
-        name, beginToken, endToken,
-        ElementKind.FUNCTION,
-        method.modifiers,
-        enclosingClass);
-    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, enclosingClass, fields);
-      addMember(element);
-    }
-    buildFieldElements(modifiers, variableDefinitions.definitions,
-                       enclosingClass,
-                       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 addMetadata(ElementX memberElement) {
-    for (Link link = metadata; !link.isEmpty; link = link.tail) {
-      memberElement.addMetadata(link.head);
-    }
-    metadata = const Link<MetadataAnnotation>();
-  }
-
-  void addMember(ElementX memberElement) {
-    addMetadata(memberElement);
-    enclosingClass.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));
-  }
-}