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79 lines
2.6 KiB
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1">
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<title>posix_time::time iterators Documentation</title>
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<link href="doxygen.css" rel="stylesheet" type="text/css">
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</head>
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<body>
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<a href="../../../index.htm">
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<img align="left" src="../../../c++boost.gif" alt="C++ Boost">
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</a>
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<h1>posix_time::time iterators</h1>
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<p> <p>
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<hr>
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<a href="index.html">Overall Index</a> --
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<a href="gregorian.html">Gregorian Index</a> --
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<a href="posix_time.html">Posix Time Index</a>
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<p>
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<font class="bold">Time Iterators</font>
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<p>
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<a href="#intro">Introduction</a> --
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<a href="#header">Header</a> --
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<a href="#classoverview">Class Overview</a>
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<p>
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<h2><a name="intro">Introduction</a></h2>
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<p>
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Time iterators provide a standard mechanism for iteration through times. Time iterators are a model of
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<a href="http://www.sgi.com/tech/stl/InputIterator.html">Input Iterator</a> and can be used to populate collections with times. The following example
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iterates using a 15 minute interation interval.
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<p>
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<div class="fragment"><pre>
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<font class="keyword">using namespace</font> boost::gregorian;
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<font class="keyword">using namespace</font> boost::posix_time;
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date d(2000,Jan,20);
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ptime start(d);<font class="comment">//2000-Jan-20 00:00:00</font>
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time_iterator titr(start,minutes(15)); <font class="comment">//iterate on 15 minute intervals</font>
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<font class="comment">//produces 00:00:00, 00:15:00, 00:30:00, 00:45:00</font>
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<font class="keyword">for</font> (; titr < ptime(d,hour(1)); ++titr) {
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std::cout << to_simple_string(*titr) << std::endl;
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}
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</pre></div>
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<p>
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The <a href="exp-print_hours.html">print hours</a>
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example iterates through the remainder of the day incrementing by an hour.
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<p>
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<h2><a name="header">Header</a></h2>
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<pre>
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#include "boost/date_time/posix_time/posix_time.hpp" //include all types plus i/o
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or
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#include "boost/date_time/posix_time/posix_time_types.hpp" //no i/o just types
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</pre>
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<p>
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<h2><a name="classoverview">Class Overview</a></h2>
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<p>
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<table border=1 cellspacing=3 cellpadding=3>
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<tr><td><b>Class</b></td>
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<td><b>Construction Parameters</b></td>
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<td><b>Description</b></td></tr>
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<tr><td>time_iterator</td>
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<td>ptime start_time, time_duration increment</td>
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<td>Iterate incrementing by the specified duration.</td></tr>
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</table>
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<hr><address><small>
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<!-- hhmts start -->
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Last modified: Thu Sep 5 07:23:04 MST 2002
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<!-- hhmts end -->
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by <a href="mailto:jeff@crystalclearsoftware.com">Jeff Garland</a> © 2000-2002
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</small></address>
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</body>
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</html>
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