Type Alias ErasedExternalPtr 

pub type ErasedExternalPtr = ExternalPtr<()>;

Type-erased ExternalPtr for cases where the concrete T is not needed.

Aliased Type

#[repr(C)]
pub struct ErasedExternalPtr {
    sexp: SEXP,
    cached_ptr: NonNull<()>,
    _marker: PhantomData<()>,
}

Fields

sexp: SEXP

cached_ptr: NonNull<()>

Cached data pointer, set once at construction time.

This avoids the R_ExternalPtrAddr FFI call on every as_ref()/as_mut(). The pointer remains valid for the lifetime of the ExternalPtr because:

• R’s finalizer only runs after R garbage-collects the SEXP (which cannot happen while a Rust ExternalPtr value exists).
• R_ClearExternalPtr is only called in methods that consume or finalize (into_raw, into_inner, release_any).

_marker: PhantomData<()>