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28        Statement</a>
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30<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">phoenix</span><span class="special">/</span><span class="identifier">statement</span><span class="special">/</span><span class="keyword">while</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
31</pre>
32<p>
33          The syntax is:
34        </p>
35<pre class="programlisting"><span class="identifier">while_</span><span class="special">(</span><span class="identifier">conditional_expression</span><span class="special">)</span>
36<span class="special">[</span>
37    <span class="identifier">sequenced_statements</span>
38<span class="special">]</span>
39</pre>
40<p>
41          Example: This code decrements each element until it reaches zero and prints
42          out the number at each step. A newline terminates the printout of each
43          value.
44        </p>
45<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">c</span><span class="special">.</span><span class="identifier">begin</span><span class="special">(),</span> <span class="identifier">c</span><span class="special">.</span><span class="identifier">end</span><span class="special">(),</span>
46    <span class="special">(</span>
47        <span class="identifier">while_</span><span class="special">(</span><span class="identifier">arg1</span><span class="special">--)</span>
48        <span class="special">[</span>
49            <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="identifier">arg1</span> <span class="special">&lt;&lt;</span> <span class="string">", "</span>
50        <span class="special">],</span>
51        <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="identifier">val</span><span class="special">(</span><span class="string">"\n"</span><span class="special">)</span>
52    <span class="special">)</span>
53<span class="special">);</span>
54</pre>
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58<td align="right"><div class="copyright-footer">Copyright &#169; 2002-2005, 2010 Joel de Guzman, Dan Marsden, Thomas Heller<p>
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