Parse formal parameters.

dart/frog/leg/tree/nodes.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.
 
 interface Visitor<R> {
   R visitBlock(Block node);
   R visitExpressionStatement(ExpressionStatement node);
   R visitFunctionExpression(FunctionExpression node);
   R visitIdentifier(Identifier node);
   R visitIf(If node);
   R visitLiteralBool(LiteralBool node);
   R visitLiteralDouble(LiteralDouble node);
   R visitLiteralInt(LiteralInt node);
   R visitLiteralString(LiteralString node);
   R visitNodeList(NodeList node);
   R visitOperator(Operator node);
-  R visitParameter(Parameter node);
   R visitReturn(Return node);
   R visitSend(Send node);
   R visitSendSet(SendSet node);
   R visitTypeAnnotation(TypeAnnotation node);
   R visitVariableDefinitions(VariableDefinitions node);
 }
 
 Token firstBeginToken(Node first, Node second) {
   return (first !== null) ? first.getBeginToken()
                           : second.getBeginToken();
@@ skipping 278 matching lines @@
 
   getEndToken() => token;
 }
 
 class Operator extends Identifier {
   const Operator(Token token) : super(token);
 
   accept(Visitor visitor) => visitor.visitOperator(this);
 }
 
-class Parameter extends Node {
-  final Identifier name;
-  final TypeAnnotation typeAnnotation;
-
-  const Parameter(this.name, [this.typeAnnotation]);
-
-  accept(Visitor visitor) => visitor.visitParameter(this);
-
-  Token getBeginToken() {
-    return firstBeginToken(typeAnnotation, name);
-  }
-
-  Token getEndToken() => name.getEndToken();
-}
-
 class Return extends Statement {
   final Expression expression;
   final Token beginToken;
   final Token endToken;
 
   const Return(this.beginToken, this.endToken, this.expression);
 
   bool get hasExpression() => expression !== null;
 
   accept(Visitor visitor) => visitor.visitReturn(this);
@@ skipping 44 matching lines @@
 }
 
 /** Representation of modifiers such as static, abstract, final, etc. */
 class Modifiers {
   final Link<Token> modifiers;
   /** Bit pattern to easy check what modifiers are present. */
   final int flags;
 
   const Modifiers([this.modifiers, this.flags = 0]);
 }