| {starstar} expr [op]:starstar [expr2]:expr
| {slash} expr [op]:slash [expr2]:expr
| {percent} expr [op]:percent [expr2]:expr
- | {uminus} minus expr
- | {uplus} plus expr
+ | {uminus} [op]:minus expr
+ | {uplus} [op]:plus expr
| {new} kwnew type id? [args]:exprs
| {attr} expr [id]:attrid
| {attr_assign} expr [id]:attrid assign [value]:expr