Trait GeneratorStep 

pub trait GeneratorStep<CONTEXT, STATE, ITEM> {
    // Required method
    fn step(context: &CONTEXT, state: &mut STATE) -> Completable<Option<ITEM>>;
}

Defines a single step of a Generator.

Implement this trait to define the logic for generating items. Each call to step should either:

• Return Ok(Some(item)) to yield an item
• Return Ok(None) when the generator is exhausted
• Return Err(Incomplete::Suspended) to yield control without producing an item
• Return Err(Incomplete::Cancelled(_)) if cancellation was detected

Type Parameters

• CONTEXT: Immutable configuration/input for the generator
• STATE: Mutable state that persists across steps
• ITEM: The type of items produced by the generator

Required Methods

fn step(context: &CONTEXT, state: &mut STATE) -> Completable<Option<ITEM>>

Execute one step of the generator.

Returns Some(item) to yield an item, or None when exhausted.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors