non associative with precedence 89
for @{ 'DBind $T $I $T1 }.
*) (**) (* this breaks all parsing *)
+notation "hvbox( T . break ④ { I } break { T1 , break T2 , break T3 } )"
+ non associative with precedence 47
+ for @{ 'DBind $T $I $T1 $T2 $T3 }.
+
notation "hvbox( # [ x ] )"
non associative with precedence 90
for @{ 'Weight $x }.