Struct BPProblem 

pub struct BPProblem { /* private fields */ }

Dynamic counterpart of BPInstance.

Implementations

impl BPProblem

pub fn new(instance: BPInstance) -> Self

pub fn remove_layout(&mut self, key: LayKey)

Removes a layout from the problem. The bin used by the layout will be closed and all items placed inside it will be deregistered.

pub fn place_item(&mut self, placement: BPPlacement) -> (LayKey, PItemKey)

Places an item according to the provided BPPlacement in the problem. Panics if the item’s demand or the selected bin’s stock is exhausted.

pub fn remove_item(&mut self, lkey: LayKey, pik: PItemKey) -> BPPlacement

Removes an item from a layout. If the layout is empty, it will be closed.

pub fn save(&self) -> BPSolution

Creates a snapshot of the current state of the problem as a BPSolution.

pub fn restore(&mut self, solution: &BPSolution) -> bool

Restores the state of the problem to the given BPSolution. Returns true if any of the layout keys changed (i.e., layouts were added or removed). Recreated layouts receive new keys; snapshot keys are not preserved for them.

pub fn instance(&self) -> &BPInstance

pub fn layouts(&self) -> &SlotMap<LayKey, Layout>

pub fn layout_bins(&self) -> &SecondaryMap<LayKey, usize>

pub fn item_demand_qtys(&self) -> &[usize]

pub fn bin_stock_qtys(&self) -> &[usize]

pub fn density(&self) -> f32

pub fn item_placed_qtys(&self) -> impl Iterator<Item = usize>

pub fn bin_used_qtys(&self) -> impl Iterator<Item = usize>

pub fn bin_cost(&self) -> u64

Returns the total cost of all bins used in the solution.

pub fn n_placed_items(&self) -> usize

Trait Implementations

impl Clone for BPProblem

fn clone(&self) -> BPProblem

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.