| .. Sequences/Views//iterator_range |
| |
| iterator_range |
| ============== |
| |
| Synopsis |
| -------- |
| |
| .. parsed-literal:: |
| |
| template< |
| typename First |
| , typename Last |
| > |
| struct iterator_range |
| { |
| // |unspecified| |
| // |...| |
| }; |
| |
| |
| Description |
| ----------- |
| |
| A view into subset of sequence elements identified by a pair of iterators. |
| |
| |
| Header |
| ------ |
| |
| .. parsed-literal:: |
| |
| #include <boost/mpl/fold.hpp> |
| |
| |
| Model of |
| -------- |
| |
| * `Forward`__, `Bidirectional`__, or |Random Access Sequence|, depending on the category |
| of the underlaying iterators. |
| |
| __ `Forward Sequence`_ |
| __ `Bidirectional Sequence`_ |
| |
| |
| |
| Parameters |
| ---------- |
| |
| +---------------+-----------------------------------+-----------------------------------------------+ |
| | Parameter | Requirement | Description | |
| +===============+===================================+===============================================+ |
| | ``First``, | |Forward Iterator| | Iterators identifying the view's boundaries. | |
| | ``Last`` | | | |
| +---------------+-----------------------------------+-----------------------------------------------+ |
| |
| |
| Expression semantics |
| -------------------- |
| |
| |Semantics disclaimer...| |Forward Sequence|. |
| |
| In the following table, ``v`` is an instance of ``iterator_range``, ``first`` and ``last`` are |
| iterators into a |Forward Sequence|, and [``first``, ``last``) form a valid range. |
| |
| +-------------------------------------------+-------------------------------------------------------+ |
| | Expression | Semantics | |
| +===========================================+=======================================================+ |
| | .. parsed-literal:: | A lazy sequence all the elements in the range | |
| | | [``first``, ``last``). | |
| | iterator_range<first,last> | | |
| | iterator_range<first,last>::type | | |
| +-------------------------------------------+-------------------------------------------------------+ |
| |
| Example |
| ------- |
| |
| .. parsed-literal:: |
| |
| typedef range_c<int,0,100> r; |
| typedef advance_c< begin<r>::type,10 >::type first; |
| typedef advance_c< end<r>::type,-10 >::type last; |
| |
| BOOST_MPL_ASSERT(( equal< |
| iterator_range<first,last> |
| , range_c<int,10,90> |
| > )); |
| |
| |
| See also |
| -------- |
| |
| |Sequences|, |Views|, |filter_view|, |transform_view|, |joint_view|, |zip_view|, |max_element| |
| |
| |
| .. copyright:: Copyright © 2001-2009 Aleksey Gurtovoy and David Abrahams |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
