//! Rules used by the `planner`
//! A rule is a constraint on valid solutions, but also provides insights
//! and eventually inferences to optimize the solving process.

// Nutritional values
// - Per day : according to user profile (man: 2000kcal, woman: 1800kcal)
// - Per meal : some meals should have higher nutrional values than others

// Ingredients
// - Per week : should use most of a limited set of ingredients (excluding
// condiments, ...)
// - To consume : must use a small set of ingredients (leftovers)
//

// Price
// - Per week : should restrict ingredients cost to a given amount