Remove frog from the repository.

frog/token.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.
-
-/**
- * A single token in the Dart language.
- */
-class Token {
-  /** A member of [TokenKind] specifying what kind of token this is. */
-  final int kind;
-
-  /** The [SourceFile] this token came from. */
-  final SourceFile source;
-
-  /** The start and end indexes into the [SourceFile] of this [Token]. */
-  final int start, end;
-
-  Token(this.kind, this.source, this.start, this.end) {}
-
-  Token.fake(this.kind, span)
-    : this.source = span.file, this.start = span.start, this.end = span.end;
-
-  /** Returns the source text corresponding to this [Token]. */
-  String get text() {
-    return source.text.substring(start, end);
-  }
-
-  /** Returns a pretty representation of this token for error messages. **/
-  String toString() {
-    var kindText = TokenKind.kindToString(kind);
-    var actualText = text;
-    if (kindText != actualText) {
-      if (actualText.length > 10) {
-        actualText = actualText.substring(0, 8) + '...';
-      }
-      return '$kindText($actualText)';
-    } else {
-      return kindText;
-    }
-  }
-
-  /** Returns a [SourceSpan] representing the source location. */
-  SourceSpan get span() {
-    return new SourceSpan(source, start, end);
-  }
-}
-
-/** A token containing a parsed literal value. */
-class LiteralToken extends Token {
-  var value;
-  LiteralToken(kind, source, start, end, this.value)
-      : super(kind, source, start, end);
-}
-
-/** A token containing error information. */
-class ErrorToken extends Token {
-  String message;
-  ErrorToken(kind, source, start, end, this.message)
-      : super(kind, source, start, end);
-}