Struct illicit::Snapshot

pub struct Snapshot { /* fields omitted */ }

A point-in-time representation of the implicit environment.

Examples

Collecting a Snapshot is useful for debugging:

illicit::Layer::new().offer(5u16).enter(|| {
    println!("{:#?}", illicit::Snapshot::get());
});

Snapshots can also be converted back into Layers for re-use:

let mut snapshot = None;
illicit::Layer::new().offer(5u16).enter(|| {
    assert_eq!(*illicit::expect::<u16>(), 5);
    snapshot = Some(illicit::Snapshot::get());
});
assert!(illicit::get::<u16>().is_err());

illicit::Layer::from(snapshot.unwrap()).enter(|| {
    assert_eq!(*illicit::expect::<u16>(), 5);
});

Implementations

impl Snapshot

pub fn get() -> Self

Returns a snapshot of the current context. Suitable for debug printing, or can be converted into a Layer for reuse.

Trait Implementations

impl Clone for Snapshot

fn clone(&self) -> Snapshot

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Snapshot

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

Formats the value using the given formatter.

impl From<Snapshot> for Layer

fn from(snapshot: Snapshot) -> Self

Performs the conversion.