projects / ceph.git / blame
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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 | <head> | |
| 5 | <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> | |
| 6 | <meta name="generator" content="Docutils 0.5: http://docutils.sourceforge.net/" /> | |
| 7 | <title>Forward Traversal Concept</title> | |
| 8 | <link rel="stylesheet" href="../../../rst.css" type="text/css" /> | |
| 9 | </head> | |
| 10 | <body> | |
| 11 | <div class="document" id="forward-traversal-concept"> | |
| 12 | <h1 class="title">Forward Traversal Concept</h1> | |
| 13 | ||
| 14 | <!-- Copyright David Abrahams 2006. Distributed under the Boost --> | |
| 15 | <!-- Software License, Version 1.0. (See accompanying --> | |
| 16 | <!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) --> | |
| 17 | <p>A class or built-in type <tt class="docutils literal"><span class="pre">X</span></tt> models the <em>Forward Traversal</em> | |
| 18 | concept if, in addition to <tt class="docutils literal"><span class="pre">X</span></tt> meeting the requirements of Default | |
| 19 | Constructible and Single Pass Iterator, the following expressions are | |
| 20 | valid and respect the stated semantics.</p> | |
| 21 | <table border="1" class="docutils"> | |
| 22 | <colgroup> | |
| 23 | <col width="38%" /> | |
| 24 | <col width="34%" /> | |
| 25 | <col width="27%" /> | |
| 26 | </colgroup> | |
| 27 | <thead valign="bottom"> | |
| 28 | <tr><th class="head" colspan="3">Forward Traversal Iterator Requirements (in addition to Default Constructible and Single Pass Iterator)</th> | |
| 29 | </tr> | |
| 30 | <tr><th class="head">Expression</th> | |
| 31 | <th class="head">Return Type</th> | |
| 32 | <th class="head">Assertion/Note</th> | |
| 33 | </tr> | |
| 34 | </thead> | |
| 35 | <tbody valign="top"> | |
| 36 | <tr><td><tt class="docutils literal"><span class="pre">X</span> <span class="pre">u;</span></tt></td> | |
| 37 | <td><tt class="docutils literal"><span class="pre">X&</span></tt></td> | |
| 38 | <td>note: <tt class="docutils literal"><span class="pre">u</span></tt> may have a | |
| 39 | singular value.</td> | |
| 40 | </tr> | |
| 41 | <tr><td><tt class="docutils literal"><span class="pre">++r</span></tt></td> | |
| 42 | <td><tt class="docutils literal"><span class="pre">X&</span></tt></td> | |
| 43 | <td><tt class="docutils literal"><span class="pre">r</span> <span class="pre">==</span> <span class="pre">s</span></tt> and <tt class="docutils literal"><span class="pre">r</span></tt> is | |
| 44 | dereferenceable implies | |
| 45 | <tt class="docutils literal"><span class="pre">++r</span> <span class="pre">==</span> <span class="pre">++s.</span></tt></td> | |
| 46 | </tr> | |
| 47 | <tr><td><tt class="docutils literal"><span class="pre">iterator_traits<X>::difference_type</span></tt></td> | |
| 48 | <td>A signed integral type representing | |
| 49 | the distance between iterators</td> | |
| 50 | <td> </td> | |
| 51 | </tr> | |
| 52 | <tr><td><tt class="docutils literal"><span class="pre">iterator_traversal<X>::type</span></tt></td> | |
| 53 | <td>Convertible to | |
| 54 | <tt class="docutils literal"><span class="pre">forward_traversal_tag</span></tt></td> | |
| 55 | <td> </td> | |
| 56 | </tr> | |
| 57 | </tbody> | |
| 58 | </table> | |
| 59 | </div> | |
| 60 | <div class="footer"> | |
| 61 | <hr class="footer" /> | |
| 62 | <a class="reference external" href="ForwardTraversal.rst">View document source</a>. | |
| 63 | Generated by <a class="reference external" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference external" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source. | |
| 64 | ||
| 65 | </div> | |
| 66 | </body> | |
| 67 | </html> |