polymer_expressions: Add % as an operator. Test all operators..

pkg/polymer_expressions/lib/tokenizer.dart

 // Copyright (c) 2013, 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 polymer_expressions.tokenizer;
 
 const int _TAB = 9;
 const int _LF = 10;
 const int _VTAB = 11;
 const int _FF = 12;
 const int _CR = 13;
 const int _SPACE = 32;
 const int _BANG = 33;
 const int _DQ = 34;
 const int _$ = 36;
+const int _PERCENT = 37;
 const int _AMPERSAND = 38;
 const int _SQ = 39;
 const int _OPEN_PAREN = 40;
 const int _CLOSE_PAREN = 41;
 const int _STAR = 42;
 const int _PLUS = 43;
 const int _COMMA = 44;
 const int _MINUS = 45;
 const int _PERIOD = 46;
 const int _SLASH = 47;
@@ skipping 17 matching lines @@
 const int _r = 114;
 const int _t = 116;
 const int _v = 118;
 const int _z = 122;
 const int _OPEN_CURLY_BRACKET = 123;
 const int _BAR = 124;
 const int _CLOSE_CURLY_BRACKET = 125;
 const int _NBSP = 160;
 
 const _OPERATORS = const [_PLUS, _MINUS, _STAR, _SLASH, _BANG, _AMPERSAND,
-                          /*_COMMA,*/ _LT, _EQ, _GT, _QUESTION, _CARET, _BAR];
+                          _PERCENT, _LT, _EQ, _GT, _QUESTION, _CARET, _BAR];
 
 const _GROUPERS = const [_OPEN_PAREN, _CLOSE_PAREN,
                          _OPEN_SQUARE_BRACKET, _CLOSE_SQUARE_BRACKET,
                          _OPEN_CURLY_BRACKET, _CLOSE_CURLY_BRACKET];
 
 const _TWO_CHAR_OPS = const ['==', '!=', '<=', '>=', '||', '&&'];
 
 const _KEYWORDS = const ['in', 'this'];
 
 const _PRECEDENCE = const {
@@ skipping 227 matching lines @@
     _tokens.add(new Token(GROUPER_TOKEN, value, _PRECEDENCE[value]));
     _advance();
   }
 }
 
 class ParseException implements Exception {
   final String message;
   ParseException(this.message);
   String toString() => "ParseException: $message";
 }