Struct HardSoftScore 

pub struct HardSoftScore { /* private fields */ }

A score with separate hard and soft constraint levels.

Hard constraints must be satisfied for a solution to be feasible. Soft constraints are optimization objectives.

When comparing scores:

1. Hard scores are compared first
2. Soft scores are only compared when hard scores are equal

Examples

use solverforge_core::HardSoftScore;

let score1 = HardSoftScore::of(-1, -100);  // 1 hard constraint broken
let score2 = HardSoftScore::of(0, -200);   // Feasible but poor soft score

// Feasible solutions are always better than infeasible ones
assert!(score2 > score1);

let score3 = HardSoftScore::of(0, -50);    // Better soft score
assert!(score3 > score2);

Implementations

impl HardSoftScore

pub const ZERO: HardSoftScore

The zero score.

pub const ONE_HARD: HardSoftScore

One hard constraint penalty.

pub const ONE_SOFT: HardSoftScore

One soft constraint penalty.

pub const fn of(hard: i64, soft: i64) -> Self

Creates a new HardSoftScore.

pub const fn of_hard(hard: i64) -> Self

Creates a score with only a hard component.

pub const fn of_soft(soft: i64) -> Self

Creates a score with only a soft component.

pub const fn hard(&self) -> i64

Returns the hard score component.

pub const fn soft(&self) -> i64

Returns the soft score component.

pub const fn hard_score(&self) -> HardSoftScore

Returns the hard score as a new HardSoftScore.

pub const fn soft_score(&self) -> HardSoftScore

Returns the soft score as a new HardSoftScore.

Trait Implementations

impl Add for HardSoftScore

type Output = HardSoftScore

The resulting type after applying the + operator.

fn add(self, other: Self) -> Self

Performs the + operation.

impl Clone for HardSoftScore

fn clone(&self) -> HardSoftScore

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HardSoftScore

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

Formats the value using the given formatter.

impl Default for HardSoftScore

fn default() -> HardSoftScore

Returns the “default value” for a type.

impl Display for HardSoftScore

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

Formats the value using the given formatter.

impl Hash for HardSoftScore

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Neg for HardSoftScore

type Output = HardSoftScore

The resulting type after applying the - operator.

fn neg(self) -> Self

Performs the unary - operation.

impl Ord for HardSoftScore

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl ParseableScore for HardSoftScore

fn parse(s: &str) -> Result<Self, ScoreParseError>

Parses a score from a string representation.

fn to_string_repr(&self) -> String

Returns the string representation of this score.

impl PartialEq for HardSoftScore

fn eq(&self, other: &HardSoftScore) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for HardSoftScore

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Score for HardSoftScore

fn is_feasible(&self) -> bool

Returns true if this score represents a feasible solution.

fn zero() -> Self

Returns the zero score (identity element for addition).

fn levels_count() -> usize

Returns the number of score levels.

fn to_level_numbers(&self) -> Vec<i64>

Returns the score values as a vector of i64.

fn from_level_numbers(levels: &[i64]) -> Self

Creates a score from level numbers.

fn multiply(&self, multiplicand: f64) -> Self

Multiplies this score by a scalar.

fn divide(&self, divisor: f64) -> Self

Divides this score by a scalar.

fn abs(&self) -> Self

Returns the absolute value of this score.

fn compare(&self, other: &Self) -> Ordering

Compares two scores, returning the ordering.

fn is_better_than(&self, other: &Self) -> bool

Returns true if this score is better than the other score.

fn is_worse_than(&self, other: &Self) -> bool

Returns true if this score is worse than the other score.

fn is_equal_to(&self, other: &Self) -> bool

Returns true if this score is equal to the other score.

impl Sub for HardSoftScore

type Output = HardSoftScore

The resulting type after applying the - operator.

fn sub(self, other: Self) -> Self

Performs the - operation.

impl Copy for HardSoftScore

impl Eq for HardSoftScore

impl StructuralPartialEq for HardSoftScore