function interpret(IContext $ctx)
{
$foo = $ctx->getFunction($this->name) ?: (isset(self::$list[$this->name]) ? self::$list[$this->name] : null);
if (!$foo) {
throw new FunctionNotFoundException("Function {$this->name} not found");
}
$values = array_map(function ($e) use($ctx) {
$e->interpret($ctx);
return $ctx->get($e);
}, $this->arguments);
$ctx->set($this, call_user_func_array($foo, $values));
}
