On Saturday, September 10, 2016 17:58:37 Russel Winder via Digitalmars-d-learn wrote: > What is the idiomatic way of cloning an array? > > I had wondered about x.dup but am now worried this is not creating a > shallow copy.
dup creates an array with mutable elements that are copies of what was in the original array. How deep a copy that is depends on the type. It does exactly as deep a copy as simply copying the element would do. e.g. auto e = arr[4]; So, unless postblit constructors are involved, then it's not going to be doing any deep copying, and if a postblit constructor that does a deep copy is involved, then any other copying you'd do with it would be deep too unless you explicitly bit-blitted it rather than copying it, and that's usually a bad idea. - Jonathan M Davis
