RosettaCodeData/Task/Copy-a-string/Bracmat/copy-a-string.bracmat

abcdef:?a;
!a:?b;

c=abcdef;
!c:?d;

!a:!b { variables a and b are the same and probably referencing the same string }
!a:!d { variables a and d are also the same but not referencing the same string }