Type Alias GEOSQueryCallback 

pub type GEOSQueryCallback = Option<unsafe extern "C" fn(item: *mut c_void, userdata: *mut c_void)>;

Aliased Type

pub enum GEOSQueryCallback {
    None,
    Some(unsafe extern "C" fn(*mut c_void, *mut c_void)),
}

Variants

None

No value.

Some(unsafe extern "C" fn(*mut c_void, *mut c_void))

Some value of type T.