Type Alias PFNGLWINDOWPOS2DPROC 

pub type PFNGLWINDOWPOS2DPROC = Option<unsafe extern "C" fn(x: GLdouble, y: GLdouble)>;

Aliased Type

pub enum PFNGLWINDOWPOS2DPROC {
    None,
    Some(unsafe extern "C" fn(f64, f64)),
}

Variants

None

No value.

Some(unsafe extern "C" fn(f64, f64))

Some value of type T.