https://issues.dlang.org/show_bug.cgi?id=24355 --- Comment #1 from anonymous4 <dfj1esp02 at sneakemail.com> --- In case 1 it's unclear what you want, it can be id[0..6]=str[0..6] or id[0..6]=str[0..6],id[6..12]=str[0..6],... - pattern copy. --