Type Alias libR_sys::fcn_p

pub type fcn_p = Option<unsafe extern "C" fn(arg1: c_int, arg2: *mut f64, arg3: *mut f64, arg4: *mut c_void)>;

type of pointer to the target and gradient functions

Aliased Type

enum fcn_p {
    None,
    Some(unsafe extern "C" fn(_: i32, _: *mut f64, _: *mut f64, _: *mut c_void)),
}

Variants

None

No value.

Some(unsafe extern "C" fn(_: i32, _: *mut f64, _: *mut f64, _: *mut c_void))

Some value of type T.