result_t operator()(config& child, const std::string& key, int startindex, int endindex) const
{
assert(endindex - startindex >= 0);
if(endindex > 0) {
// NOTE: currently this is only called from as_range_visitor_base<vi_policy_create>
// Based on that assumption we use vi_policy_create::get_child_at here instead of making this
// a class template.
vi_policy_create::get_child_at(child, key, endindex - 1);
}
int size_diff = datasource_.size() - (endindex - startindex);
// remove configs first
while(size_diff < 0) {
child.remove_child(key, startindex);
++size_diff;
}
std::size_t index = 0;
for(index = 0; index < static_cast<std::size_t>(size_diff); ++index) {
child.add_child_at(key, config(), startindex + index).swap(datasource_[index]);
}
for(; index < datasource_.size(); ++index) {
child.child(key, startindex + index).swap(datasource_[index]);
}
return get_child_range(child, key, startindex, datasource_.size());
}
