on_error()

template<typename type_t >

virtual void xtd::iobserver< type_t >::on_error ( const std::exception &  error )

pure virtualnoexcept

Notifies the observer that the provider has experienced an error condition.

Parameters

error

n object that provides additional information about the error.

Examples

The following example provides an implementation of the on_error method in a latitude/longitude tracking application. The method simply reports that data is currently unavailable; it does not make use of the std::exception object passed to it as a parameter. See the Example section of the xtd::iobserver<type_t> topic for the complete example.

void on_error(const std::exception& e) noexcept override {
  console::write_line("{}: The location cannot be determined.", name());
}