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26 | <div class="titlepage"><div><div><h3 class="title"> | |
27 | <a name="phoenix.starter_kit.lazy_statements"></a><a class="link" href="lazy_statements.html" title="Lazy Statements">Lazy Statements</a> | |
28 | </h3></div></div></div> | |
29 | <p> | |
30 | Lazy statements? Sure. There are lazy versions of the C++ statements we all | |
31 | know and love. For example: | |
32 | </p> | |
33 | <pre class="programlisting"><span class="identifier">if_</span><span class="special">(</span><span class="identifier">arg1</span> <span class="special">></span> <span class="number">5</span><span class="special">)</span> | |
34 | <span class="special">[</span> | |
35 | <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">arg1</span> | |
36 | <span class="special">]</span> | |
37 | </pre> | |
38 | <p> | |
39 | Say, for example, we wish to print all the elements that are greater than | |
40 | 5 (separated by a comma) in a vector. Here's how we write it: | |
41 | </p> | |
42 | <pre class="programlisting"><span class="identifier">std</span><span class="special">::</span><span class="identifier">for_each</span><span class="special">(</span><span class="identifier">v</span><span class="special">.</span><span class="identifier">begin</span><span class="special">(),</span> <span class="identifier">v</span><span class="special">.</span><span class="identifier">end</span><span class="special">(),</span> | |
43 | <span class="identifier">if_</span><span class="special">(</span><span class="identifier">arg1</span> <span class="special">></span> <span class="number">5</span><span class="special">)</span> | |
44 | <span class="special">[</span> | |
45 | <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">arg1</span> <span class="special"><<</span> <span class="string">", "</span> | |
46 | <span class="special">]</span> | |
47 | <span class="special">);</span> | |
48 | </pre> | |
49 | <p> | |
50 | (See <a href="../../../../example/if.cpp" target="_top">if.cpp</a>) | |
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56 | Learn more about statements <a class="link" href="../modules/statement.html" title="Statement">here.</a> | |
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62 | <td align="right"><div class="copyright-footer">Copyright © 2002-2005, 2010, 2014, 2015 Joel de Guzman, Dan Marsden, Thomas | |
63 | Heller, John Fletcher<p> | |
64 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
65 | 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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