Enum ObjectiveSense 

pub enum ObjectiveSense {
    Minimize,
    Maximize,
}

The direction in which an objective is optimised.

This is the typed direction primitive that reconciles the library’s maximise-native engine with cost objectives (the benchmark landscapes). See the module documentation for the two-space model.

Variants

Minimize

Lower is better (cost, loss, error, distance-to-target).

Maximize

Higher is better (reward, fitness, accuracy, score).

Implementations

impl ObjectiveSense

pub fn to_canonical(self, raw: f32) -> f32

Maps a raw user-space objective value into the engine’s maximise-native canonical space.

Maximize passes the value through unchanged; Minimize negates it so a cost surface is optimised as −cost by the maximise-native engine. Applied once, at the harness / fitness-adapter boundary.

use rlevo_core::objective::ObjectiveSense;
assert_eq!(ObjectiveSense::Maximize.to_canonical(3.0), 3.0);
assert_eq!(ObjectiveSense::Minimize.to_canonical(3.0), -3.0);

pub fn from_canonical(self, canonical: f32) -> f32

Inverse of to_canonical: maps an engine-space (canonical, maximise) value back to the user’s declared sense for reporting (best_fitness, records, showcases).

Because the mapping is an involution (negate iff Minimize), this is the same operation as to_canonical.

use rlevo_core::objective::ObjectiveSense;
// A Minimize landscape optimised as -cost in canonical space reads back
// as its natural cost.
let canonical = ObjectiveSense::Minimize.to_canonical(2.5); // -2.5
assert_eq!(ObjectiveSense::Minimize.from_canonical(canonical), 2.5);

Trait Implementations

impl Clone for ObjectiveSense

fn clone(&self) -> ObjectiveSense

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ObjectiveSense

impl Debug for ObjectiveSense

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ObjectiveSense

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for ObjectiveSense

impl Hash for ObjectiveSense

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 PartialEq for ObjectiveSense

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for ObjectiveSense

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ObjectiveSense