[boost] Re: Re: Re: rtl (Range Template Library)

From: Thorsten Ottosen (nesotto_at_[hidden])
Date: 2003-11-19 06:28:50

"Brian McNamara" <lorgon_at_[hidden]> wrote in message
news:20031119100449.GA16839_at_lennon.cc.gatech.edu...

>
> You may be interested to read
>
>
http://groups.google.com/groups?q=brian+mcnamara+range+group:comp.lang.c%2B%2B.moderated+group:comp.lang.c%2B%2B.moderated&hl=en&lr=&ie=UTF-8&group=comp.lang.c%2B%2B.moderated&selm=8gm2i6%24gbt%241%40news-int.gatech.edu&rnum=5
>
> and other messages in-that-thread/of-mine from that time period.

>From thead:
-------------
class interval {    // a "single iterator" type (and a "concept")
      // conceptually this encapsulates a pair of iterators, first & last
      operator++       // advance (e.g. first++)
      operator*        // get element (*first)
      bool isEnd()     // the "first==last" concept, easier for
InputIters
      stl_iterator first()  // probably unnecessary
      stl_iterator last()   // the lynchpin--see below
   }

I find the idea of having Pavol's iterator_range augemented with
operator*() and operator++ quite nice. isEnd() is equal to
empty() which should be equal to operator bool-something();

It might also be nice with a
constructor that can limit the stored range in some way, eg.

vector<int> v;
iterator_range< ... > r( v ); // [begin(), end() )
iterator_range< ... > r( v, 5, 5 ); // [begin() + 5, end() - 5)

or something

-Thorsten