Type Alias R_altstring_No_NA_method_t 

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

Must return 1 if x is known not to store any missing values (see STRING_NO_NA), otherwise 0 (including if it’s unknown). The default method always returns 0.

Aliased Type

pub enum R_altstring_No_NA_method_t {
    None,
    Some(unsafe extern "C" fn(*mut SEXPREC) -> i32),
}

Variants

None

No value.

Some(unsafe extern "C" fn(*mut SEXPREC) -> i32)

Some value of type T.