Struct Stage 

pub struct Stage<M = ()> {
    pub function: ItemFn,
    pub metadata: M,
}

One link in a converter’s stage chain — a value-inspecting step that sits between the rust value the #[prebindgen] fn yields/receives and the wire-facing ConverterImpl::function.

Each stage is a fallible In → Result<Out, Err> function. The core pipeline only ever emits and de-duplicates Self::function; how a stage’s Err arm is surfaced to the foreign side — throw an exception, return an error code, set errno, … — is entirely up to the destination-language adapter and is described by Self::metadata.

Fields

function: ItemFn

Complete function definition for this stage. Same shape as ConverterImpl::function but typed for this stage’s own In → Out and own error type.

metadata: M

Adapter-specific extras for this stage — same Metadata type as the owning converter (ConverterImpl::metadata). The core never inspects this; the adapter’s emitter reads it to decide how the stage’s Err arm is surfaced (e.g. a JNI adapter stores the JVM exception class and throw_* fn to call here; a C adapter might store the error-code sentinel). Defaults to ().

Trait Implementations

impl<M: Clone> Clone for Stage<M>

fn clone(&self) -> Stage<M>

Returns a duplicate of the value.

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

Performs copy-assignment from source.