On Sunday, 23 March 2014 at 00:50:34 UTC, Walter Bright wrote:
auto e = r.front;
Remember that front is a getter property, which means it should
work like a variable. Typically, reading a variable is not
destructive and needs no preparation. There's exceptions to the
rule, but they almost always work this way, so ranges should too.
If true, this means that r.front will have to cache a copy in
many cases.
Indeed, in many of my quick input ranges, I just make front a
regular variable and popFront updates it to the next item.
