1<?xml version="1.0" encoding="utf-8" ?> 2<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 3<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> 4<!-- Copyright Aleksey Gurtovoy 2006. Distributed under the Boost --> 5<!-- Software License, Version 1.0. (See accompanying --> 6<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) --> 7<head> 8<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 9<meta name="generator" content="Docutils 0.3.6: http://docutils.sourceforge.net/" /> 10<title>THE BOOST MPL LIBRARY: Iterator Protocol</title> 11<link rel="stylesheet" href="../style.css" type="text/css" /> 12</head> 13<body class="docframe"> 14<table class="header"><tr class="header"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./apply-lambda-semantics.html" class="navigation-link">Prev</a> <a href="./tag-dispatching-protocol.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./apply-lambda-semantics.html" class="navigation-link">Back</a> <a href="./tag-dispatching-protocol.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./changes-in-boost-1-32-0.html" class="navigation-link">Up</a> <a href="../index.html" class="navigation-link">Home</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./tutorial_toc.html" class="navigation-link">Full TOC</a></span></td> 15<td class="header-group page-location"><a href="../index.html" class="navigation-link">Front Page</a> / <a href="./changelog-history.html" class="navigation-link">Changelog & History</a> / <a href="./changes-in-boost-1-32-0.html" class="navigation-link">Changes in Boost 1.32.0 Release</a> / <a href="./iterator-protocol.html" class="navigation-link">Iterator Protocol</a></td> 16</tr></table><div class="header-separator"></div> 17<div class="section" id="iterator-protocol"> 18<h1><a class="toc-backref" href="./changes-in-boost-1-32-0.html#id65" name="iterator-protocol">Iterator Protocol</a></h1> 19<p>The library no longer guarantees or relies on the direct presence 20of <tt class="literal"><span class="pre">advance</span></tt> / <tt class="literal"><span class="pre">distance</span></tt> / <tt class="literal"><span class="pre">next</span></tt> / <tt class="literal"><span class="pre">prior</span></tt> / <tt class="literal"><span class="pre">type</span></tt> 21members in iterator types; the following table summarises the new 22requirements:</p> 23<table border="1" class="table"> 24<colgroup> 25<col width="50%" /> 26<col width="50%" /> 27</colgroup> 28<thead valign="bottom"> 29<tr><th>Before</th> 30<th>Now</th> 31</tr> 32</thead> 33<tbody valign="top"> 34<tr><td><tt class="literal"><span class="pre">i::type</span></tt></td> 35<td><tt class="literal"><span class="pre">deref<i>::type</span></tt></td> 36</tr> 37<tr><td><tt class="literal"><span class="pre">i::next</span></tt></td> 38<td><tt class="literal"><span class="pre">next<i>::type</span></tt></td> 39</tr> 40<tr><td><tt class="literal"><span class="pre">i::prior</span></tt></td> 41<td><tt class="literal"><span class="pre">prior<i>::type</span></tt></td> 42</tr> 43<tr><td><tt class="literal"><span class="pre">i::advance<n>::type</span></tt></td> 44<td><tt class="literal"><span class="pre">advance<i,n>::type</span></tt></td> 45</tr> 46<tr><td><tt class="literal"><span class="pre">i::distance<j>::type</span></tt></td> 47<td><tt class="literal"><span class="pre">distance<i,j>::type</span></tt></td> 48</tr> 49<tr><td><tt class="literal"><span class="pre">i::category</span></tt></td> 50<td><tt class="literal"><span class="pre">i::category</span></tt></td> 51</tr> 52</tbody> 53</table> 54</div> 55 56<div class="footer-separator"></div> 57<table class="footer"><tr class="footer"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./apply-lambda-semantics.html" class="navigation-link">Prev</a> <a href="./tag-dispatching-protocol.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./apply-lambda-semantics.html" class="navigation-link">Back</a> <a href="./tag-dispatching-protocol.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./changes-in-boost-1-32-0.html" class="navigation-link">Up</a> <a href="../index.html" class="navigation-link">Home</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./tutorial_toc.html" class="navigation-link">Full TOC</a></span></td> 58</tr></table></body> 59</html> 60