Type Alias constructor 

pub type constructor = Option<unsafe extern "C" fn(prefix: *mut c_char, arg: *mut c_char) -> c_int>;

HAL ‘constructor’ typedef If it is not NULL, this points to a function which can construct a new instance of its component. Return value is >=0 for success, <0 for error.

Aliased Type

pub enum constructor {
    None,
    Some(unsafe extern "C" fn(*mut i8, *mut i8) -> i32),
}

Variants

None

No value.

Some(unsafe extern "C" fn(*mut i8, *mut i8) -> i32)

Some value of type T.