public function parse(Parser $parser)
{
$lexer = $parser->getLexer();
$parser->match(Lexer::T_IDENTIFIER);
$parser->match(Lexer::T_OPEN_PARENTHESIS);
$this->expr[] = $parser->StringPrimary();
$parser->match(Lexer::T_COMMA);
$this->expr[] = $parser->StringPrimary();
while (Lexer::T_COMMA === $lexer->lookahead['type']) {
$parser->match(Lexer::T_COMMA);
$this->expr[] = $parser->StringPrimary();
}
$parser->match(Lexer::T_CLOSE_PARENTHESIS);
}