Trait SidecarField 

#[doc(hidden)]
pub trait SidecarField {
    // Required methods
    fn __mx_flush(&self, prot: SEXP, index: usize);
    fn __mx_load(&self, prot: SEXP, index: usize);
    fn __mx_discard_pending(&self);
    fn __mx_replaces_saved(&self) -> bool;
}

A Sidecar<T> field, as the handle sees it through the TypedExternal::__mx_visit_sidecars hook the derive emits. Every method runs on R’s main thread.

Required Methods

fn __mx_flush(&self, prot: SEXP, index: usize)

Moves a pending value into slot index of prot.

fn __mx_load(&self, prot: SEXP, index: usize)

Reads slot index of prot back into the field as its pending value, unless one is pending already.

fn __mx_discard_pending(&self)

Drops a pending value, which a write to the slot supersedes.

fn __mx_replaces_saved(&self) -> bool

Whether the pending value was made by Sidecar::replace.

Dyn Compatibility

This trait is dyn compatible.

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

Implementors

impl<T> SidecarField for Sidecar<T>