Vector declaration syntax 1+ 1? 1 type_qualifier 1 storage_class_specifier 2 vector 2 __vector 3.0 bool 3.0 signed 3.0 unsigned 3.1 char 3.1 short 3.1.1? 3.1.1 int 3.1 int 3.1 long 3.1.1? 3.1.1 int 3 pixel 3 __pixel 3 float