>From this thread (http://forum.dlang.org/post/mailman.89.1383248384.9546.digitalmars-d-learn@puremagic.com) I was under the impression that const/immutable and postblits don't mix. This DIP seems to be trying to address that. One of the potential workarounds to this issue was the idea of struct copy constructors. This is what I was referring to. With this proposal, is there still a need for struct copy constructors?