Struct HardSoftDecimalScore 

pub struct HardSoftDecimalScore { /* private fields */ }

A score with separate hard and soft constraint levels, using i64 with ×100000 scaling.

This provides 5 decimal places of precision (matching Timefold’s BigDecimal display) while maintaining zero heap allocation and full type safety.

Internal values are stored pre-scaled. Use of for unscaled input or of_scaled for pre-scaled values.

Examples

use solverforge_core::{HardSoftDecimalScore, Score};

// Create from unscaled values (automatically multiplied by 100000)
let score1 = HardSoftDecimalScore::of(-1, -100);
assert_eq!(score1.hard_scaled(), -100000);
assert_eq!(score1.soft_scaled(), -10000000);

// Create from pre-scaled values (for minute-based penalties)
let score2 = HardSoftDecimalScore::of_scaled(-3050000, 0);  // -30.5 hard
assert!(!score2.is_feasible());

// Display shows values (trailing zeros stripped)
let score3 = HardSoftDecimalScore::of_scaled(-150000, -250000);
assert_eq!(format!("{}", score3), "-1.5hard/-2.5soft");

Implementations

impl HardSoftDecimalScore

pub const ZERO: HardSoftDecimalScore

The zero score.

pub const ONE_HARD: HardSoftDecimalScore

One hard constraint penalty (scaled).

pub const ONE_SOFT: HardSoftDecimalScore

One soft constraint penalty (scaled).

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

Creates a new score from unscaled values.

The values are automatically multiplied by 100000.

Examples

use solverforge_core::HardSoftDecimalScore;

let score = HardSoftDecimalScore::of(-2, -100);
assert_eq!(score.hard_scaled(), -200000);
assert_eq!(score.soft_scaled(), -10000000);

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

Creates a new score from pre-scaled values.

Use this for minute-based penalties where precision matters.

Examples

use solverforge_core::HardSoftDecimalScore;

// -30.5 hard constraint (overlap of 30.5 minutes)
let score = HardSoftDecimalScore::of_scaled(-3050000, 0);
assert_eq!(score.hard_scaled(), -3050000);

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

Creates a score with only a hard component (unscaled input).

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

Creates a score with only a soft component (unscaled input).

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

Creates a score with only a hard component (pre-scaled input).

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

Creates a score with only a soft component (pre-scaled input).

pub const fn hard_scaled(&self) -> i64

Returns the scaled hard score component.

pub const fn soft_scaled(&self) -> i64

Returns the scaled soft score component.

pub const fn hard_score(&self) -> HardSoftDecimalScore

Returns the hard score as a new HardSoftDecimalScore.

pub const fn soft_score(&self) -> HardSoftDecimalScore

Returns the soft score as a new HardSoftDecimalScore.

pub const fn has_hard_component(&self) -> bool

Returns true if this score has a non-zero hard component.

Used by constraint streams to determine if a weight represents a hard or soft constraint.

Trait Implementations

impl Add for HardSoftDecimalScore

type Output = HardSoftDecimalScore

The resulting type after applying the + operator.

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

Performs the + operation.

impl Clone for HardSoftDecimalScore

fn clone(&self) -> HardSoftDecimalScore

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HardSoftDecimalScore

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

Formats the value using the given formatter.

impl Default for HardSoftDecimalScore

fn default() -> HardSoftDecimalScore

Returns the “default value” for a type.

impl Display for HardSoftDecimalScore

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

Formats the value using the given formatter.

impl Hash for HardSoftDecimalScore

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 HardSoftDecimalScore

type Output = HardSoftDecimalScore

The resulting type after applying the - operator.

fn neg(self) -> Self

Performs the unary - operation.

impl Ord for HardSoftDecimalScore

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 HardSoftDecimalScore

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 HardSoftDecimalScore

fn eq(&self, other: &HardSoftDecimalScore) -> 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 HardSoftDecimalScore

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 HardSoftDecimalScore

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 HardSoftDecimalScore

type Output = HardSoftDecimalScore

The resulting type after applying the - operator.

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

Performs the - operation.

impl Copy for HardSoftDecimalScore

impl Eq for HardSoftDecimalScore

impl StructuralPartialEq for HardSoftDecimalScore