Struct Goals 

#[non_exhaustive]
pub struct Goals {
    pub objectives: Vec<f64>,
    pub violation: f64,
}

What a model gives for one design: its goals, each to be made as small as it can be, and by how much it breaks the constraints, zero if it keeps them all.

A design the model can’t evaluate (a flight that fails) is Goals::failed: its violation is +∞, so every design that could be evaluated dominates it. Infinite values serialize as none, a JSON null.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

objectives: Vec<f64>

The goals’ values, in the order the model gives them.

violation: f64

The total violation, Σ max(0, gⱼ) over constraints written gⱼ ≤ 0: zero if the design keeps them all, +∞ if it failed.

Implementations

impl Goals

pub fn feasible(objectives: Vec<f64>) -> Self

Goals with no constraints to break.

pub fn constrained(objectives: Vec<f64>, constraints: &[f64]) -> Self

Goals under constraints gⱼ(x) ≤ 0, given as the numbers gⱼ: the violation is Σ max(0, gⱼ), as for Evaluation::constrained, whose advice on scaling the constraints holds here too.

pub fn failed() -> Self

A design the model can’t evaluate: no goals, and a violation of +∞, behind every other.

pub fn is_feasible(&self) -> bool

Whether the design keeps every constraint.

Trait Implementations

impl Clone for Goals

fn clone(&self) -> Goals

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Goals

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Goals

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Goals

fn eq(&self, other: &Goals) -> 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 Serialize for Goals

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 Goals