Struct vrp_core::solver::Builder

pub struct Builder {
    pub max_generations: Option<usize>,
    pub max_time: Option<usize>,
    pub cost_variation: Option<(usize, f64)>,
    pub config: EvolutionConfig,
}

Provides configurable way to build solver.

Fields

max_generations: Option<usize>

max_time: Option<usize>

cost_variation: Option<(usize, f64)>

config: EvolutionConfig

Implementations

impl Builder

pub fn new(problem: Arc<Problem>) -> Self

impl Builder

pub fn with_max_generations(self, limit: Option<usize>) -> Self

Sets max generations to be run. Default is 2000.

pub fn with_cost_variation(self, variation: Option<(usize, f64)>) -> Self

Sets cost variation termination criteria. Default is None.

pub fn with_max_time(self, limit: Option<usize>) -> Self

Sets max running time limit. Default is 300 seconds.

pub fn with_initial_methods(
    self,
    initial_methods: Vec<(Box<dyn Recreate>, usize)>
) -> Self

Sets initial methods.

pub fn with_solutions(self, solutions: Vec<Arc<Solution>>) -> Self

Sets initial solutions. Default is none.

pub fn with_population_size(self, size: usize) -> Self

Sets population size. Default is 4.

pub fn with_offspring_size(self, size: usize) -> Self

Sets offspring size. Default is 4.

pub fn with_elite_size(self, size: usize) -> Self

Sets elite size. Default is 2.

pub fn with_initial_size(self, size: usize) -> Self

Sets initial population size. Each initial individual is constructed separately which used to take more time than normal refinement process. Default is 2.

pub fn with_mutation(self, mutation: Box<dyn Mutation>) -> Self

Sets mutation algorithm. Default is ruin and recreate.

pub fn with_termination(self, termination: Box<dyn Termination>) -> Self

Sets termination algorithm. Default is max time and max generations.

pub fn build(self) -> Result<Solver, String>

Builds solver with parameters specified.