function parse($input)
{
if (!self::$tokenizer) {
self::$tokenizer = new NTokenizer(self::$patterns, 'mi');
}
$input = str_replace("\r", '', $input);
$input = strtr($input, "\t", ' ');
$input = "\n" . $input . "\n";
self::$tokenizer->tokenize($input);
$this->n = 0;
$res = $this->_parse();
while (isset(self::$tokenizer->tokens[$this->n])) {
if (self::$tokenizer->tokens[$this->n][0] === "\n") {
$this->n++;
} else {
$this->error();
}
}
return $res;
}
