function __toString()
{
$var_pat = "\\\$[a-zA-Z_][a-zA-Z0-9_'\"\\[\\]]*";
$fe_pat = "/\\s*({$var_pat})\\s+as(:?\\s+({$var_pat})\\s+(:?=>|:))?\\s+({$var_pat})/";
preg_match($fe_pat, $this->contents, $matches);
$iterable = PhpToJs::varToJs($matches[1]);
$key = $matches[3] ? substr($matches[3], 1) : 'key';
$iterator = PhpToJs::varToJs($matches[5]);
$str = "(function(data) { var " . OUTPUT_VAR . " = '';\n";
$str .= "for (var {$key} in {$iterable}) { if ({$iterable}.hasOwnProperty({$key})) {";
PhpToJs::pushVar($iterator, $iterable . '[' . $key . ']');
PhpToJs::pushVar("data." . $key, $key);
return $str;
}
