change fasta.Token.isIdentifier() from method to getter

pkg/front_end/lib/src/fasta/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.
 
 library fasta.scanner.token;
 
 import '../../scanner/token.dart' as analyzer;
 import '../../scanner/token.dart' show TokenType;
 
 import 'token_constants.dart' show IDENTIFIER_TOKEN;
@@ skipping 83 matching lines @@
 
   /**
    * The precedence level for this token.
    */
   int get precedence => info.precedence;
 
   /**
    * True if this token is an identifier. Some keywords allowed as identifiers,
    * see implementation in [KeywordToken].
    */
-  bool isIdentifier();
+  bool get isIdentifier;
 
   bool get isPseudo => false;
 
   /**
    * Returns a textual representation of this token to be used for debugging
    * purposes. The resulting string might contain information about the
    * structure of the token, for example 'StringToken(foo)' for the identifier
    * token 'foo'.
    *
    * Use [lexeme] for the text actually parsed by the token.
@@ skipping 140 matching lines @@
     return eof;
   }
 
   @override
   String get lexeme => info.value;
 
   @override
   String get stringValue => info.value;
 
   @override
-  bool isIdentifier() => false;
+  bool get isIdentifier => false;
 
   @override
   String toString() => "SymbolToken(${isEof ? '-eof-' : lexeme})";
 
   @override
   bool get isEof => info == analyzer.TokenType.EOF;
 
   @override
   Token copyWithoutComments() => isEof
       ? new SymbolToken.eof(charOffset)
@@ skipping 53 matching lines @@
   final analyzer.Keyword keyword;
 
   KeywordToken(this.keyword, int charOffset) : super(charOffset);
 
   TokenType get info => keyword.info;
 
   String get lexeme => keyword.lexeme;
 
   String get stringValue => keyword.lexeme;
 
-  bool isIdentifier() => keyword.isPseudo || keyword.isBuiltIn;
+  bool get isIdentifier => keyword.isPseudo || keyword.isBuiltIn;
 
   bool get isPseudo => keyword.isPseudo;
 
   bool get isBuiltInIdentifier => keyword.isBuiltIn;
 
   String toString() => "KeywordToken($lexeme)";
 
   @override
   Token copyWithoutComments() => new KeywordToken(keyword, charOffset);
 
@@ skipping 107 matching lines @@
         valueOrLazySubstring =
             decodeUtf8(data, start, end, valueOrLazySubstring.boolValue);
       }
       return valueOrLazySubstring;
     }
   }
 
   /// See [Token.stringValue] for an explanation.
   String get stringValue => null;
 
-  bool isIdentifier() => identical(kind, IDENTIFIER_TOKEN);
+  bool get isIdentifier => identical(kind, IDENTIFIER_TOKEN);
 
   String toString() => "StringToken($lexeme)";
 
   static final StringCanonicalizer canonicalizer = new StringCanonicalizer();
 
   static String canonicalizedString(
       String s, int start, int end, bool canonicalize) {
     if (!canonicalize) return s;
     return canonicalizer.canonicalize(s, start, end, false);
   }
@@ skipping 204 matching lines @@
       identical(value, "<=") ||
       identical(value, "<") ||
       identical(value, "&") ||
       identical(value, "^") ||
       identical(value, "|");
 }
 
 bool isTernaryOperator(String value) => identical(value, "[]=");
 
 bool isMinusOperator(String value) => identical(value, "-");