Type Alias arg_comparefn 

pub type arg_comparefn = Option<unsafe extern "C" fn(k1: *const c_void, k2: *const c_void) -> c_int>;

Aliased Type

pub enum arg_comparefn {
    None,
    Some(unsafe extern "C" fn(*const c_void, *const c_void) -> i32),
}

Variants

None

No value.

Some(unsafe extern "C" fn(*const c_void, *const c_void) -> i32)

Some value of type T.