Subject: Re: [boost] AlRangeExandrescu?
From: Kai Schroeder (kaischroeder3_at_[hidden])
Date: 2009-07-25 11:36:06
On Sat, Jul 25, 2009 at 7:11 AM, Andrei Alexandrescu <
> David Abrahams wrote:
>> on Fri Jul 24 2009, Andrei Alexandrescu <andrei-AT-metalanguage.com>
>> Another example of an iterator-based design that's not easy to
>>> replicate with ranges is Boost Multi-Index. (Thanks Emil Dotchevski
>>> for pointing that out during my talk. (Marshall Clow promised the
>>> video will be available Real Real Soon Now(tm).)) In Multi-Index,
>>> indexes store iterators; storing ranges would often waste twice the
>>> space for little or no benefit.
>> Can't you handle that by storing a range that always contains only one
>> element: [iterator,iterator+1)?
> You can, but that doubles the memory eaten by the index.
Isn't it possible to create single element ranges from every iterator by
slightly modifying its interface to fulfill a range concept (without
additional memory requirements)?