Doggy bags for saving leftovers in restaurants are extremely common in the USA, especially as portions sizes are usually too large to consume in one meal.
But I have read in various forums that it isn't socially acceptable to ask for a box for leftovers in France, and that some restaurants don't even have take-home boxes available. Is this true? If so, are there alternatives to having uneaten food thrown away and wasted? What do the locals do if they can't finish their meal?