double yank_code(Protein &p) {
if(top<int>(p) < 0) return 0;
int index = pop<int>(p);
std::size_t count;
try {
item<T> i = get_nth_item(stack<T>(p), (unsigned)index, erase);
put_item(i, stack<T>(p));
count = i.container.size();
}
catch(const detail::stack_underflow&) {
push<int>(p, index);
return 0;
}
return count;
}
Light* LightManager::GetLight(size_t index)
{
return get_nth_item(m_Lights, index);
}