| '(' ctype ',' comma_types1 ')' { LL $ HsTupleTy Boxed ($2:$4) }
| '(#' comma_types1 '#)' { LL $ HsTupleTy Unboxed $2 }
| '[' ctype ']' { LL $ HsListTy $2 }
+ | '<{' ctype '}>' '@' tyvar { LL $ HsModalBoxType (unLoc $5) $2 }
| '<[' ctype ']>' '@' tyvar { LL $ HsModalBoxType (unLoc $5) $2 }
| '[:' ctype ':]' { LL $ HsPArrTy $2 }
| '(' ctype ')' { LL $ HsParTy $2 }