forked from boostorg/fusion
Eric Niebler
5b6d08974e
https://svn.boost.org/svn/boost/trunk ........ r40862 | dave | 2007-11-06 15:39:09 -0800 (Tue, 06 Nov 2007) | 2 lines Added missing copyright/license ........ r40863 | djowel | 2007-11-06 18:12:28 -0800 (Tue, 06 Nov 2007) | 1 line added copyright and license info for each page. ........ r40864 | aaron_windsor | 2007-11-06 18:30:38 -0800 (Tue, 06 Nov 2007) | 1 line Shortening file name of a graph test to < 32 characters ........ r40865 | djowel | 2007-11-06 18:34:18 -0800 (Tue, 06 Nov 2007) | 1 line added license info in copyright notice at the footer ........ r40866 | djowel | 2007-11-06 19:06:23 -0800 (Tue, 06 Nov 2007) | 1 line added license info in copyright notice at the footer ........ r40867 | djowel | 2007-11-06 19:23:31 -0800 (Tue, 06 Nov 2007) | 1 line added license info in copyright notice at the footer ........ r40868 | djowel | 2007-11-06 19:25:59 -0800 (Tue, 06 Nov 2007) | 1 line added copyright and license info for each page. ........ r40869 | djowel | 2007-11-06 19:27:38 -0800 (Tue, 06 Nov 2007) | 1 line added license info in copyright notice at the footer ........ r40870 | djowel | 2007-11-06 19:30:01 -0800 (Tue, 06 Nov 2007) | 1 line added copyright and license info for each page. ........ r40871 | djowel | 2007-11-06 19:35:49 -0800 (Tue, 06 Nov 2007) | 1 line added copyright and license info for each page. ........ r40872 | djowel | 2007-11-06 19:37:51 -0800 (Tue, 06 Nov 2007) | 1 line added copyright and license info for each page. ........ r40873 | djowel | 2007-11-06 19:46:23 -0800 (Tue, 06 Nov 2007) | 1 line added copyright and license info for each page. ........ r40874 | chris_kohlhoff | 2007-11-06 22:49:36 -0800 (Tue, 06 Nov 2007) | 2 lines Add copyright notice. ........ r40875 | chris_kohlhoff | 2007-11-06 22:53:17 -0800 (Tue, 06 Nov 2007) | 2 lines Add myself as asio maintainer. ........ r40876 | chris_kohlhoff | 2007-11-06 23:23:53 -0800 (Tue, 06 Nov 2007) | 2 lines Add asio. ........ r40877 | joaquin | 2007-11-07 00:45:27 -0800 (Wed, 07 Nov 2007) | 1 line reapplied change at rev 40284 ........ r40878 | johnmaddock | 2007-11-07 02:07:08 -0800 (Wed, 07 Nov 2007) | 1 line Ooops, got the pp-logic wrong and disable long double support for all Unix platforms, instead of just Intel on Linux prior to version 10. ........ r40879 | johnmaddock | 2007-11-07 02:09:50 -0800 (Wed, 07 Nov 2007) | 1 line Fix calls to fpclassify so they don't trigger macro expansion when fpclassify is a macro. ........ r40880 | t_schwinger | 2007-11-07 02:14:42 -0800 (Wed, 07 Nov 2007) | 3 lines adds FunctionTypes ........ r40881 | johnmaddock | 2007-11-07 03:50:02 -0800 (Wed, 07 Nov 2007) | 1 line Change test (again) so that the range of values tested matches original test: last change started testing more extreme input values, which caused regressions on Mac OS X. ........ r40882 | johnmaddock | 2007-11-07 03:59:39 -0800 (Wed, 07 Nov 2007) | 3 lines Disabled use of long double when BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS is defined. Disabled special-double precision error rates when BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS is defined. ........ r40883 | johnmaddock | 2007-11-07 04:04:01 -0800 (Wed, 07 Nov 2007) | 1 line Oops get the name of test right! ........ r40884 | anthonyw | 2007-11-07 04:10:17 -0800 (Wed, 07 Nov 2007) | 1 line Added missing licence and copyright ........ r40885 | garcia | 2007-11-07 04:25:16 -0800 (Wed, 07 Nov 2007) | 2 lines added logging library. ........ r40886 | garcia | 2007-11-07 05:38:53 -0800 (Wed, 07 Nov 2007) | 2 lines Exception was accepted. ........ r40887 | fcacciola | 2007-11-07 06:12:15 -0800 (Wed, 07 Nov 2007) | 1 line Added explicit failures for newly discovered GCC const ref binding bug (see Ticket #1301) ........ [SVN r40891]
141 lines
12 KiB
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141 lines
12 KiB
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>I/O</title>
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<a accesskey="p" href="../operator.html"><img src="../../../../../../../doc/html/images/prev.png" alt="Prev"></a><a accesskey="u" href="../operator.html"><img src="../../../../../../../doc/html/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../../../doc/html/images/home.png" alt="Home"></a><a accesskey="n" href="i_o/in.html"><img src="../../../../../../../doc/html/images/next.png" alt="Next"></a>
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<div class="section" lang="en">
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<div class="titlepage"><div><div><h4 class="title">
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<a name="fusion.sequence.operator.i_o"></a><a href="i_o.html" title="I/O">I/O</a></h4></div></div></div>
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<div class="toc"><dl>
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<dt><span class="section"><a href="i_o/in.html">in</a></span></dt>
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<dt><span class="section"><a href="i_o/out.html">out</a></span></dt>
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</dl></div>
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<p>
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The I/O operators: <tt class="computeroutput"><span class="special"><<</span></tt>
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and <tt class="computeroutput"><span class="special">>></span></tt> work generically
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on all Fusion sequences. The global <tt class="computeroutput"><span class="keyword">operator</span><span class="special"><<</span></tt> has been overloaded for generic
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output streams such that <a href="../../sequence.html" title="Sequence">Sequence</a>(s)
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are output by recursively calling <tt class="computeroutput"><span class="keyword">operator</span><span class="special"><<</span></tt> for each element. Analogously,
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the global <tt class="computeroutput"><span class="keyword">operator</span><span class="special">>></span></tt>
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has been overloaded to extract <a href="../../sequence.html" title="Sequence">Sequence</a>(s)
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from generic input streams by recursively calling <tt class="computeroutput"><span class="keyword">operator</span><span class="special">>></span></tt> for each element.
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</p>
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<p>
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The default delimiter between the elements is space, and the <a href="../../sequence.html" title="Sequence">Sequence</a>
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is enclosed in parenthesis. For Example:
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</p>
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<pre class="programlisting">
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<a href="../../container/vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></a><span class="special"><</span><span class="keyword">float</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">></span> <span class="identifier">a</span><span class="special">(</span><span class="number">1.0f</span><span class="special">,</span> <span class="number">2</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">(</span><span class="string">"Howdy folks!"</span><span class="special">);</span>
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<span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">a</span><span class="special">;</span>
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</pre>
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<p>
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outputs the <a href="../../container/vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></a>
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as: (1.0 2 Howdy folks!)
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</p>
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<p>
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The library defines three manipulators for changing the default behavior:
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</p>
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<div class="variablelist">
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<p class="title"><b>Manipulators</b></p>
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<dl>
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<dt><span class="term"><tt class="computeroutput"><span class="identifier">tuple_open</span><span class="special">(</span><span class="identifier">arg</span><span class="special">)</span></tt></span></dt>
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<dd><p>
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Defines the character that is output before the first element.
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</p></dd>
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<dt><span class="term"><tt class="computeroutput"><span class="identifier">tuple_close</span><span class="special">(</span><span class="identifier">arg</span><span class="special">)</span></tt></span></dt>
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<dd><p>
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Defines the character that is output after the last element.
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</p></dd>
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<dt><span class="term"><tt class="computeroutput"><span class="identifier">tuple_delimiter</span><span class="special">(</span><span class="identifier">arg</span><span class="special">)</span></tt></span></dt>
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<dd><p>
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Defines the delimiter character between elements.
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</p></dd>
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</dl>
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</div>
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<p>
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The argument to <tt class="computeroutput"><span class="identifier">tuple_open</span></tt>,
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<tt class="computeroutput"><span class="identifier">tuple_close</span></tt> and <tt class="computeroutput"><span class="identifier">tuple_delimiter</span></tt> may be a <tt class="computeroutput"><span class="keyword">char</span></tt>, <tt class="computeroutput"><span class="keyword">wchar_t</span></tt>,
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a C-string, or a wide C-string.
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</p>
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<p>
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Example:
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</p>
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<pre class="programlisting">
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<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">tuple_open</span><span class="special">(</span><span class="char">'['</span><span class="special">)</span> <span class="special"><<</span> <span class="identifier">tuple_close</span><span class="special">(</span><span class="char">']'</span><span class="special">)</span> <span class="special"><<</span> <span class="identifier">tuple_delimiter</span><span class="special">(</span><span class="string">", "</span><span class="special">)</span> <span class="special"><<</span> <span class="identifier">a</span><span class="special">;</span>
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</pre>
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<p>
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outputs the same <a href="../../container/vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></a>, <tt class="computeroutput"><span class="identifier">a</span></tt>
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as: [1.0, 2, Howdy folks!]
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</p>
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<p>
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The same manipulators work with <tt class="computeroutput"><span class="keyword">operator</span><span class="special">>></span></tt> and <tt class="computeroutput"><span class="identifier">istream</span></tt>
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as well. Suppose the <tt class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">cin</span></tt>
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stream contains the following data:
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</p>
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<pre class="programlisting">
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<span class="special">(</span><span class="number">1</span> <span class="number">2</span> <span class="number">3</span><span class="special">)</span> <span class="special">[</span><span class="number">4</span><span class="special">:</span><span class="number">5</span><span class="special">]</span>
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</pre>
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<p>
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The code:
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</p>
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<pre class="programlisting">
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<a href="../../container/vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></a><span class="special"><</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">></span> <span class="identifier">i</span><span class="special">;</span>
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<a href="../../container/vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></a><span class="special"><</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">></span> <span class="identifier">j</span><span class="special">;</span>
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<span class="identifier">std</span><span class="special">::</span><span class="identifier">cin</span> <span class="special">>></span> <span class="identifier">i</span><span class="special">;</span>
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<span class="identifier">std</span><span class="special">::</span><span class="identifier">cin</span> <span class="special">>></span> <span class="identifier">set_open</span><span class="special">(</span><span class="char">'['</span><span class="special">)</span> <span class="special">>></span> <span class="identifier">set_close</span><span class="special">(</span><span class="char">']'</span><span class="special">)</span> <span class="special">>></span> <span class="identifier">set_delimiter</span><span class="special">(</span><span class="char">':'</span><span class="special">);</span>
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<span class="identifier">std</span><span class="special">::</span><span class="identifier">cin</span> <span class="special">>></span> <span class="identifier">j</span><span class="special">;</span>
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</pre>
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<p>
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reads the data into the <a href="../../container/vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></a>(s) <tt class="computeroutput"><span class="identifier">i</span></tt>
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and <tt class="computeroutput"><span class="identifier">j</span></tt>.
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</p>
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<p>
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Note that extracting <a href="../../sequence.html" title="Sequence">Sequence</a>(s)
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with <tt class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span></tt> or C-style string elements does
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not generally work, since the streamed <a href="../../sequence.html" title="Sequence">Sequence</a>
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representation may not be unambiguously parseable.
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</p>
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<a name="fusion.sequence.operator.i_o.header"></a><h5>
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<a name="id516759"></a>
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<a href="i_o.html#fusion.sequence.operator.i_o.header">Header</a>
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</h5>
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<pre class="programlisting">
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<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">sequence</span><span class="special">/</span><span class="identifier">io</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
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<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">include</span><span class="special">/</span><span class="identifier">io</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
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</pre>
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</div>
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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<td align="left"></td>
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<td align="right"><div class="copyright-footer"><small>Copyright © 2001-2007 Joel de Guzman, Dan Marsden, Tobias
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Schwinger<p>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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</p></small></div></td>
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