Struct BPProblem

pub struct BPProblem {
    pub instance: BPInstance,
    pub layouts: SlotMap<LayKey, Layout>,
    pub item_demand_qtys: Vec<usize>,
    pub bin_stock_qtys: Vec<usize>,
}

Modifiable counterpart of BPInstance. Items can be placed and removed, bins can be opened and closed.

Fields

instance: BPInstance

layouts: SlotMap<LayKey, Layout>

item_demand_qtys: Vec<usize>

bin_stock_qtys: Vec<usize>

Implementations

impl BPProblem

pub fn new(instance: BPInstance) -> Self

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

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

Places an item according to the given BPPlacement in the problem.

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

Removes an item from a layout. If the layout is empty, it will be closed. Set commit_instantly to false if there’s a high chance that this modification will be reverted.

pub fn save(&mut self) -> BPSolution

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

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

Restores the state of the problem to the given BPSolution.

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.

Trait Implementations

impl Clone for BPProblem

fn clone(&self) -> BPProblem

Returns a copy of the value.

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

Performs copy-assignment from source.