Mark all parameters const to get a strong pure function. For "this" const goes on the method:class Foo { int i = 0; void bar() const pure { // can't mutate i here } }See also: http://dlang.org/function.html#pure-functions
I see, thanks a lot. I like this pure feature and was already disappointed. Scala doesn't have it (has to remain interoperable with Java), so I was really happy to see it in D. Your answer saved my day :-) -- Bienlein
