message: Fixed move constructors for MeshReader::MaterialRegistry
diff: @@ -58,26 +58,35 @@ struct MeshReader::MaterialRegistry::MaterialRegistryImpl {
  // Create the implementation
  MeshReader::MaterialRegistry::MaterialRegistry()
  - : mImpl(new MaterialRegistryImpl) {
  + : mImpl(new MaterialRegistryImpl()) {
  }
  +
  // Deep copy the implementation
  MeshReader::MaterialRegistry::MaterialRegistry(const MaterialRegistry& rhs)
  : mImpl(new MaterialRegistryImpl(*rhs.mImpl)) {
  }
  +
  MeshReader::MaterialRegistry& MeshReader::MaterialRegistry::operator=(const MaterialRegistry& rhs) {
  *mImpl = *rhs.mImpl;
  return *this;
  }
  // Delete the implementation
  MeshReader::MaterialRegistry::~MaterialRegistry() {
  + if (mImpl != nullptr) {
  delete mImpl;
  }
  +}
  // Default move construction
  -MeshReader::MaterialRegistry::MaterialRegistry(MaterialRegistry&&) = default;
  +MeshReader::MaterialRegistry::MaterialRegistry(MaterialRegistry&& rhs)
  + : mImpl(nullptr) {
  + std::swap(mImpl, rhs.mImpl);
  +}
  MeshReader::MaterialRegistry& MeshReader::MaterialRegistry::operator=(MaterialRegistry&& rhs) {
  - *mImpl = std::move(*rhs.mImpl);
  + delete mImpl;
  + mImpl = nullptr;
  + std::swap(mImpl, rhs.mImpl);
  return *this;
  }
  @@ -96,7 +105,8 @@ filament::MaterialInstance* MeshReader::MaterialRegistry::getMaterialInstance(
  void MeshReader::MaterialRegistry::registerMaterialInstance(const utils::CString& name,
  filament::MaterialInstance* materialInstance) {
  // Add the material to our map
  - mImpl->materialMap[name] = materialInstance;
  + //mImpl->materialMap[name] = materialInstance;
  + mImpl->materialMap.insert({name, materialInstance});
  }
  void MeshReader::MaterialRegistry::unregisterMaterialInstance(const utils::CString& name) {
  