On 10/2/2015 10:49 AM, Eric Niebler wrote:
On Thursday, 1 October 2015 at 21:03:16 UTC, Walter Bright wrote:
I don't see evidence that C++ had ranges before D. Boost ranges are not what
we think of as ranges.
Why not?
Because it returns iterators. It should expose functions (or operators) that do
this:
front
popFront
empty
not iterators. Instead, it has:
begin
end
empty
The begin and end are iterators, and don't encapsulate (i.e. constrain) what can
be done with those iterators. For example, begin can return an iterator that can
be used to increment right on past the end. The iterator itself has no knowledge
of where the end is.
This is the issue that D ranges (and Matthew's and your's) solve. I believe the
difference is fundamental.
http://www.boost.org/doc/libs/1_34_0/libs/range/doc/range.html
It's possible I misunderstand it, please correct me if so.
