Trait FlipBack 

pub trait FlipBack {
    // Required method
    fn extract(&self) -> BackState;
}

A black-box secondary engine that can only surface a locator for flip-back.

Secondaries implement FlipBack and never FlipDonor. That is the charter’s no-chain invariant (§4) expressed in the type system: there is no path to forward-donate a document to another secondary, so a flip is always one hop (primary ↔ secondary), re-rooting at the lossless source rather than chaining.

Required Methods

fn extract(&self) -> BackState

Extract the cheap locator (URL, scroll, form, cookies) the black box exposes.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors