pub type PhidgetGPS_OnHeadingChangeCallback = Option<unsafe extern "C" fn(ch: PhidgetGPSHandle, ctx: *mut c_void, heading: f64, velocity: f64)>;Aliased Type§
pub enum PhidgetGPS_OnHeadingChangeCallback {
None,
Some(unsafe extern "C" fn(*mut _PhidgetGPS, *mut c_void, f64, f64)),
}