lib/src/token.dart

library mustache.token;


class TokenType {
  
  const TokenType(this.name);
  
  final String name;
  
  String toString() => '(TokenType $name)';

  static const TokenType text = const TokenType('text');
  static const TokenType openDelimiter = const TokenType('openDelimiter');
  static const TokenType closeDelimiter = const TokenType('closeDelimiter');

  // A sigil is the word commonly used to describe the special character at the
  // start of mustache tag i.e. #, ^ or /.
  static const TokenType sigil = const TokenType('sigil');
  static const TokenType identifier = const TokenType('identifier');
  static const TokenType dot = const TokenType('dot');
  
  static const TokenType changeDelimiter = const TokenType('changeDelimiter');
  static const TokenType whitespace = const TokenType('whitespace');
  static const TokenType lineEnd = const TokenType('lineEnd');

}


class Token {
  
  Token(this.type, this.value, this.start, this.end);
  
  final TokenType type;
  final String value;
  
  final int start;
  final int end;
  
  String toString() => "(Token ${type.name} \"$value\" $start $end)";
  
  // Only used for testing.
  bool operator ==(o) => o is Token
      && type == o.type
      && value == o.value
      && start == o.start
      && end == o.end;
  
  // TODO hashcode. import quiver.
}