item *reloadable = nullptr;
{
int reloadable_pos;
std::stringstream ss(act->name);
ss >> reloadable_pos;
reloadable = &p->i_at(reloadable_pos);
}
From the code that comes after this I’m pretty sure it gets the item that you’re trying to reload and assigns it to reloadable.
What do act->name and &p->i_at(reloadable_pos) do?
Just from a glance, it looks like act->name is storing the position of the item to reload (as a string for some reason), and then ss >> reloadable_pos converts this string into an int, then it is picking the item at that position from the players inventory with &p->i_at(reloadable_pos).
What do you mean by position?
Where in the player’s internal code representing the inventory the item is located. It really should be using the position parameter according to https://github.com/CleverRaven/Cataclysm-DDA/blob/master/doc/PLAYER_ACTIVITY.md.