On Sunday, November 17, 2013 11:53:57 David Nadlinger wrote: > On Sunday, 17 November 2013 at 10:33:12 UTC, Philippe Sigaud > > wrote: > > But `popFront()` changes an internal state with visible, > > external > > effects: it changes `front` return value and in the end, it will > > affect `empty` return value. > > So no, I don't consider `popFront` to be pure. > > That's actually not a reason for them to be impure (see e.g. > http://klickverbot.at/blog/2012/05/purity-in-d#pure_member_functions > for my attempt on explaining that).
I should put that on my list of articles to link people to. I'd forgotten about it. For that matter, I should probably write more articles like that myself so that I can point people to them instead of explaining the same thing over and over again. - Jonathan M Davis
