Parse metadata, but ignore it.

dart/lib/compiler/implementation/scanner/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.
 
 final int EOF_TOKEN = 0;
 
 final int KEYWORD_TOKEN = $k;
 final int IDENTIFIER_TOKEN = $a;
 final int DOUBLE_TOKEN = $d;
 final int INT_TOKEN = $i;
@@ skipping 11 matching lines @@
 final int GT_TOKEN = $GT;
 final int HASH_TOKEN = $HASH;
 final int OPEN_CURLY_BRACKET_TOKEN = $OPEN_CURLY_BRACKET;
 final int OPEN_SQUARE_BRACKET_TOKEN = $OPEN_SQUARE_BRACKET;
 final int OPEN_PAREN_TOKEN = $OPEN_PAREN;
 final int LT_TOKEN = $LT;
 final int MINUS_TOKEN = $MINUS;
 final int PERIOD_TOKEN = $PERIOD;
 final int PLUS_TOKEN = $PLUS;
 final int QUESTION_TOKEN = $QUESTION;
+final int AT_TOKEN = $AT;
 final int CLOSE_CURLY_BRACKET_TOKEN = $CLOSE_CURLY_BRACKET;
 final int CLOSE_SQUARE_BRACKET_TOKEN = $CLOSE_SQUARE_BRACKET;
 final int CLOSE_PAREN_TOKEN = $CLOSE_PAREN;
 final int SEMICOLON_TOKEN = $SEMICOLON;
 final int SLASH_TOKEN = $SLASH;
 final int TILDE_TOKEN = $TILDE;
 final int STAR_TOKEN = $STAR;
 final int PERCENT_TOKEN = $PERCENT;
 final int CARET_TOKEN = $CARET;
 
@@ skipping 281 matching lines @@
   const PrecedenceInfo(const SourceString('=>'), 0, FUNCTION_TOKEN);
 final PrecedenceInfo HASH_INFO =
   const PrecedenceInfo(const SourceString('#'), 0, HASH_TOKEN);
 final PrecedenceInfo INDEX_EQ_INFO =
   const PrecedenceInfo(const SourceString('[]='), 0, INDEX_EQ_TOKEN);
 final PrecedenceInfo SEMICOLON_INFO =
   const PrecedenceInfo(const SourceString(';'), 0, SEMICOLON_TOKEN);
 final PrecedenceInfo COMMA_INFO =
   const PrecedenceInfo(const SourceString(','), 0, COMMA_TOKEN);
 
+final PrecedenceInfo AT_INFO =
+  const PrecedenceInfo(const SourceString('@'), 0, AT_TOKEN);
+
 // Assignment operators.
 final int ASSIGNMENT_PRECEDENCE = 1;
 final PrecedenceInfo AMPERSAND_EQ_INFO =
   const PrecedenceInfo(const SourceString('&='),
                        ASSIGNMENT_PRECEDENCE, AMPERSAND_EQ_TOKEN);
 final PrecedenceInfo BAR_EQ_INFO =
   const PrecedenceInfo(const SourceString('|='),
                        ASSIGNMENT_PRECEDENCE, BAR_EQ_TOKEN);
 final PrecedenceInfo CARET_EQ_INFO =
   const PrecedenceInfo(const SourceString('^='),
@@ skipping 148 matching lines @@
 
 final PrecedenceInfo HEXADECIMAL_INFO =
   const PrecedenceInfo(const SourceString('hexadecimal'), 0, HEXADECIMAL_TOKEN);
 
 final PrecedenceInfo COMMENT_INFO =
   const PrecedenceInfo(const SourceString('comment'), 0, COMMENT_TOKEN);
 
 // For reporting lexical errors.
 final PrecedenceInfo ERROR_INFO =
   const PrecedenceInfo(const SourceString('?'), 0, UNKNOWN_TOKEN);