Type Alias gtk4_sys::GtkExpressionNotify

pub type GtkExpressionNotify = Option<unsafe extern "C" fn(_: gpointer)>;

Aliased Type

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

Variants

None

No value.

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

Some value of type T.