Version 1.5.0-dev.4.14

dart/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;
@@ skipping 60 matching lines @@
   '?':  1,
   '||': 2,
   '&&': 3,
   '|':  4,
   '^':  5,
   '&':  6,
 
   // equality
   '!=': 7,
   '==': 7,
+  '!==': 7,
+  '===': 7,
 
   // relational
   '>=': 8,
   '>':  8,
   '<=': 8,
   '<':  8,
 
   // additive
   '+':  9,
   '-':  9,
@@ skipping 180 matching lines @@
   tokenizeOperator() {
     int startChar = _next;
     _advance();
     var op;
     // check for 2 character operators
     if (isOperator(_next)) {
       var op2 = new String.fromCharCodes([startChar, _next]);
       if (_TWO_CHAR_OPS.contains(op2)) {
         op = op2;
         _advance();
+        // kind of hacky check for === and !===, could be better / more general
+        if (_next == _EQ && (startChar == _BANG || startChar == _EQ)) {
+          op = op2 + '=';
+          _advance();
+        }
       } else {
         op = new String.fromCharCode(startChar);
       }
     } else {
       op = new String.fromCharCode(startChar);
     }
     _tokens.add(new Token(OPERATOR_TOKEN, op, _PRECEDENCE[op]));
   }
 
   tokenizeGrouper() {
     var value = new String.fromCharCode(_next);
     _tokens.add(new Token(GROUPER_TOKEN, value, _PRECEDENCE[value]));
     _advance();
   }
 }
 
 class ParseException implements Exception {
   final String message;
   ParseException(this.message);
   String toString() => "ParseException: $message";
 }