gan_tokenizer.php
protected function parse_identifier() {
		$this->token_start = $this->pos;

		while((++$this->pos < $this->size) && isset($this->identifiers[$this->doc[$this->pos]])) {}

		--$this->pos;
		return self::TOK_IDENTIFIER;
	}
protected function parse_identifier() {
		$this->token_start = $this->pos;

		while((++$this->pos < $this->size) && isset($this->identifiers[$this->doc[$this->pos]])) {}

		--$this->pos;
		return self::TOK_IDENTIFIER;
	}
Parse identifiers
@return int Token
@internal Gets called with {@link $identifiers} characters