pub type PFNGLUNIFORM3FPROC = Option<unsafe extern "C" fn(location: GLint, v0: GLfloat, v1: GLfloat, v2: GLfloat)>;
pub enum PFNGLUNIFORM3FPROC { None, Some(unsafe extern "C" fn(i32, f32, f32, f32)), }
No value.
Some value of type T.
T