code: private byte parseBinaryLiteral(Token input) {
  		String text = input.text;
  		if (text.length() > 11) {
  			// FIXME: this will be deprecated!
  			syntaxError("invalid binary literal (too long)", input);
  		}
  		int val = 0;
  		// Start past 0b
  		for (int i = 2; i != text.length(); ++i) {
  			char c = text.charAt(i);
  			// Skip underscore
  			if(c == '_') { continue; }
  			val = val << 1;
  			if (c == '1') {
  				val = val | 1;
  			} else if (c == '0') {
  
  			} else {
  				syntaxError("invalid binary literal (invalid characters)", input);
  			}
  		}
  		return (byte) val;
  	}
docs: Parse a token representing a binary literal, such as "0b0110", "0b1111_0101",
  etc.
  
  @param input
  The token representing the byte value.
  @return