Struct DynamicValueSelector

pub struct DynamicValueSelector<Var> { /* private fields */ }

Similar to DynamicBrancher, this is a pass-along structure which should be used when a Sized object is required.

Implementations

impl<Var> DynamicValueSelector<Var>

pub fn new(selector: Box<dyn ValueSelector<Var>>) -> Self

Trait Implementations

impl<Var> Debug for DynamicValueSelector<Var>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<Var> ValueSelector<Var> for DynamicValueSelector<Var>

fn select_value( &mut self, context: &mut SelectionContext<'_>, decision_variable: Var, ) -> Predicate

Determines which value in the domain of decision_variable to branch next on. The domain of the decision_variable variable should have at least 2 values in it (as it otherwise should not have been selected as decision_variable). Returns a Predicate specifying the required change in the domain.

fn on_solution(&mut self, solution: SolutionReference<'_>)

This method is called when a solution is found; either when iterating over all solutions in the case of a satisfiable problem or on solutions of increasing quality when solving an optimisation problem.

fn on_unassign_integer(&mut self, variable: DomainId, value: i32)

A function which is called after a DomainId is unassigned during backtracking (i.e. when it was fixed but is no longer), specifically, it provides variable which is the DomainId which has been reset and value which is the value to which the variable was previously fixed. This method could thus be called multiple times in a single backtracking operation by the solver.

fn on_unassign_literal(&mut self, literal: Literal)

A function which is called after a Literal is unassigned during backtracking (i.e. when it was fixed but is no longer), specifically, it provides literal which is the Literal which has been reset. This method could thus be called multiple times in a single backtracking operation by the solver.

fn is_restart_pointless(&mut self) -> bool

This method returns whether a restart is currently pointless for the ValueSelector.