Function reset

examples/example-server-lib/tiling_window_manager.cpp:176–179

{
template<typename ValueType>
void reset(mir::optional_value<ValueType>& option)
{
    if (option.is_set()) option.consume();
}

template<typename ValueType>
void set_if_needed(mir::optional_value<ValueType>& pending, ValueType const& current, ValueType const& correct)