Type Alias libR_sys::R_altrep_Length_method_t

pub type R_altrep_Length_method_t = Option<unsafe extern "C" fn(arg1: SEXP) -> R_xlen_t>;

Aliased Type

enum R_altrep_Length_method_t {
    None,
    Some(unsafe extern "C" fn(_: *mut SEXPREC) -> isize),
}

Variants

None

No value.

Some(unsafe extern "C" fn(_: *mut SEXPREC) -> isize)

Some value of type T.