Struct StudyBuilder 

pub struct StudyBuilder<V: PartialOrd = f64> { /* private fields */ }

A builder for constructing Study instances with a fluent API.

Created via Study::builder(). Collects sampler, pruner, direction, and storage options before constructing the study.

Defaults

• Direction: Minimize
• Sampler: RandomSampler
• Pruner: NopPruner
• Storage: MemoryStorage

Examples

use optimizer::prelude::*;

let study: Study<f64> = Study::builder()
    .maximize()
    .sampler(TpeSampler::new())
    .pruner(MedianPruner::new(Direction::Maximize).n_warmup_steps(5))
    .build();

assert_eq!(study.direction(), Direction::Maximize);

Implementations

impl<V: PartialOrd> StudyBuilder<V>

pub fn minimize(self) -> Self

Set the optimization direction to minimize (the default).

pub fn maximize(self) -> Self

Set the optimization direction to maximize.

pub fn direction(self, direction: Direction) -> Self

Set the optimization direction explicitly.

pub fn sampler(self, sampler: impl Sampler + 'static) -> Self

Set the sampler used for parameter suggestions.

Defaults to RandomSampler if not specified.

pub fn pruner(self, pruner: impl Pruner + 'static) -> Self

Set the pruner used for early stopping of trials.

Defaults to NopPruner (no pruning) if not specified.

pub fn storage(self, storage: impl Storage<V> + 'static) -> Self

Set a custom storage backend.

Defaults to MemoryStorage if not specified.

pub fn build(self) -> Study<V>

where V: Send + Sync + 'static,

Build the Study with the configured options.