try {
surface_id_to_layer_map stl{};
auto m = j["mappings"];
+ stl.layers.reserve(m.size());
std::transform(
std::cbegin(m), std::cend(m),
std::inserter(stl.mapping, stl.mapping.end()),
- [](nlohmann::json const &j) { return surface_id_to_layer(j); });
+ [&stl](nlohmann::json const &j) {
+ auto k = surface_id_to_layer(j);
+ stl.layers.push_back(unsigned(k.layer_id));
+ return k;
+ });
+ // XXX need to sort layers?
for (auto i : stl.mapping) {
if (i.name.empty()) {
return Err<struct surface_id_to_layer_map>(