libs/regex/doc/html/boost_regex/ref/non_std_strings/mfc_strings/mfc_iter.html


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<title>Iterating Over the Matches Within An MFC String</title>
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<div class="titlepage"><div><div><h5 class="title">
<a name="boost_regex.ref.non_std_strings.mfc_strings.mfc_iter"></a><a class="link" href="mfc_iter.html" title="Iterating Over the Matches Within An MFC String">Iterating
          Over the Matches Within An MFC String</a>
</h5></div></div></div>
<p>
            The following helper functions are provided to ease the conversion from
            an MFC/ATL string to a <a class="link" href="../../regex_iterator.html" title="regex_iterator"><code class="computeroutput"><span class="identifier">regex_iterator</span></code></a> or <a class="link" href="../../regex_token_iterator.html" title="regex_token_iterator"><code class="computeroutput"><span class="identifier">regex_token_iterator</span></code></a>:
          </p>
<h5>
<a name="boost_regex.ref.non_std_strings.mfc_strings.mfc_iter.h0"></a>
            <span><a name="boost_regex.ref.non_std_strings.mfc_strings.mfc_iter.regex_iterator_creation_helper"></a></span><a class="link" href="mfc_iter.html#boost_regex.ref.non_std_strings.mfc_strings.mfc_iter.regex_iterator_creation_helper">regex_iterator
            creation helper</a>
          </h5>
<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">charT</span><span class="special">&gt;</span>
<span class="identifier">regex_iterator</span><span class="special">&lt;</span><span class="identifier">charT</span> <span class="keyword">const</span><span class="special">*&gt;</span>
   <span class="identifier">make_regex_iterator</span><span class="special">(</span>
      <span class="keyword">const</span> <span class="identifier">ATL</span><span class="special">::</span><span class="identifier">CSimpleStringT</span><span class="special">&lt;</span><span class="identifier">charT</span><span class="special">&gt;&amp;</span> <span class="identifier">s</span><span class="special">,</span>
      <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special">&lt;</span><span class="identifier">charT</span><span class="special">&gt;&amp;</span> <span class="identifier">e</span><span class="special">,</span>
      <span class="special">::</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">f</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">);</span>
</pre>
<p>
            <span class="bold"><strong>Effects</strong></span>: returns <code class="computeroutput"><span class="identifier">regex_iterator</span><span class="special">(</span><span class="identifier">s</span><span class="special">.</span><span class="identifier">GetString</span><span class="special">(),</span> <span class="identifier">s</span><span class="special">.</span><span class="identifier">GetString</span><span class="special">()</span> <span class="special">+</span> <span class="identifier">s</span><span class="special">.</span><span class="identifier">GetLength</span><span class="special">(),</span>
            <span class="identifier">e</span><span class="special">,</span>
            <span class="identifier">f</span><span class="special">);</span></code>
          </p>
<p>
            <span class="bold"><strong>Example</strong></span>:
          </p>
<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">enumerate_links</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">CString</span><span class="special">&amp;</span> <span class="identifier">html</span><span class="special">)</span>
<span class="special">{</span>
   <span class="comment">// enumerate and print all the  links in some HTML text,</span>
   <span class="comment">// the expression used is by Andew Lee on www.regxlib.com:</span>
   <span class="identifier">boost</span><span class="special">::</span><span class="identifier">tregex</span> <span class="identifier">r</span><span class="special">(</span>
      <span class="identifier">__T</span><span class="special">(</span><span class="string">"href=[\"\']((http:\\/\\/|\\.\\/|\\/)?\\w+"</span>
          <span class="string">"(\\.\\w+)*(\\/\\w+(\\.\\w+)?)*"</span>
          <span class="string">"(\\/|\\?\\w*=\\w*(&amp;\\w*=\\w*)*)?)[\"\']"</span><span class="special">));</span>
   <span class="identifier">boost</span><span class="special">::</span><span class="identifier">tregex_iterator</span> <span class="identifier">i</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">make_regex_iterator</span><span class="special">(</span><span class="identifier">html</span><span class="special">,</span> <span class="identifier">r</span><span class="special">)),</span> <span class="identifier">j</span><span class="special">;</span>
   <span class="keyword">while</span><span class="special">(</span><span class="identifier">i</span> <span class="special">!=</span> <span class="identifier">j</span><span class="special">)</span>
   <span class="special">{</span>
      <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="special">(*</span><span class="identifier">i</span><span class="special">)[</span><span class="number">1</span><span class="special">]</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
      <span class="special">++</span><span class="identifier">i</span><span class="special">;</span>
   <span class="special">}</span>
<span class="special">}</span>
</pre>
<h5>
<a name="boost_regex.ref.non_std_strings.mfc_strings.mfc_iter.h1"></a>
            <span><a name="boost_regex.ref.non_std_strings.mfc_strings.mfc_iter.regex_token_iterator_creation_helpers"></a></span><a class="link" href="mfc_iter.html#boost_regex.ref.non_std_strings.mfc_strings.mfc_iter.regex_token_iterator_creation_helpers">regex_token_iterator
            creation helpers</a>
          </h5>
<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">charT</span><span class="special">&gt;</span>
<span class="identifier">regex_token_iterator</span><span class="special">&lt;</span><span class="identifier">charT</span> <span class="keyword">const</span><span class="special">*&gt;</span>
   <span class="identifier">make_regex_token_iterator</span><span class="special">(</span>
      <span class="keyword">const</span> <span class="identifier">ATL</span><span class="special">::</span><span class="identifier">CSimpleStringT</span><span class="special">&lt;</span><span class="identifier">charT</span><span class="special">&gt;&amp;</span> <span class="identifier">s</span><span class="special">,</span>
      <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special">&lt;</span><span class="identifier">charT</span><span class="special">&gt;&amp;</span> <span class="identifier">e</span><span class="special">,</span>
      <span class="keyword">int</span> <span class="identifier">sub</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span>
      <span class="special">::</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">f</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">);</span>
</pre>
<p>
            <span class="bold"><strong>Effects</strong></span>: returns <code class="computeroutput"><span class="identifier">regex_token_iterator</span><span class="special">(</span><span class="identifier">s</span><span class="special">.</span><span class="identifier">GetString</span><span class="special">(),</span> <span class="identifier">s</span><span class="special">.</span><span class="identifier">GetString</span><span class="special">()</span> <span class="special">+</span> <span class="identifier">s</span><span class="special">.</span><span class="identifier">GetLength</span><span class="special">(),</span>
            <span class="identifier">e</span><span class="special">,</span>
            <span class="identifier">sub</span><span class="special">,</span>
            <span class="identifier">f</span><span class="special">);</span></code>
          </p>
<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">charT</span><span class="special">&gt;</span>
<span class="identifier">regex_token_iterator</span><span class="special">&lt;</span><span class="identifier">charT</span> <span class="keyword">const</span><span class="special">*&gt;</span>
   <span class="identifier">make_regex_token_iterator</span><span class="special">(</span>
      <span class="keyword">const</span> <span class="identifier">ATL</span><span class="special">::</span><span class="identifier">CSimpleStringT</span><span class="special">&lt;</span><span class="identifier">charT</span><span class="special">&gt;&amp;</span> <span class="identifier">s</span><span class="special">,</span>
      <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special">&lt;</span><span class="identifier">charT</span><span class="special">&gt;&amp;</span> <span class="identifier">e</span><span class="special">,</span>
      <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;&amp;</span> <span class="identifier">subs</span><span class="special">,</span>
      <span class="special">::</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">f</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">);</span>
</pre>
<p>
            <span class="bold"><strong>Effects</strong></span>: returns <code class="computeroutput"><span class="identifier">regex_token_iterator</span><span class="special">(</span><span class="identifier">s</span><span class="special">.</span><span class="identifier">GetString</span><span class="special">(),</span> <span class="identifier">s</span><span class="special">.</span><span class="identifier">GetString</span><span class="special">()</span> <span class="special">+</span> <span class="identifier">s</span><span class="special">.</span><span class="identifier">GetLength</span><span class="special">(),</span>
            <span class="identifier">e</span><span class="special">,</span>
            <span class="identifier">subs</span><span class="special">,</span>
            <span class="identifier">f</span><span class="special">);</span></code>
          </p>
<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">N</span><span class="special">&gt;</span>
<span class="identifier">regex_token_iterator</span><span class="special">&lt;</span><span class="identifier">charT</span> <span class="keyword">const</span><span class="special">*&gt;</span>
   <span class="identifier">make_regex_token_iterator</span><span class="special">(</span>
      <span class="keyword">const</span> <span class="identifier">ATL</span><span class="special">::</span><span class="identifier">CSimpleStringT</span><span class="special">&lt;</span><span class="identifier">charT</span><span class="special">&gt;&amp;</span> <span class="identifier">s</span><span class="special">,</span>
      <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special">&lt;</span><span class="identifier">charT</span><span class="special">&gt;&amp;</span> <span class="identifier">e</span><span class="special">,</span>
      <span class="keyword">const</span> <span class="keyword">int</span> <span class="special">(&amp;</span> <span class="identifier">subs</span><span class="special">)[</span><span class="identifier">N</span><span class="special">],</span>
      <span class="special">::</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">f</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">);</span>
</pre>
<p>
            <span class="bold"><strong>Effects</strong></span>: returns <code class="computeroutput"><span class="identifier">regex_token_iterator</span><span class="special">(</span><span class="identifier">s</span><span class="special">.</span><span class="identifier">GetString</span><span class="special">(),</span> <span class="identifier">s</span><span class="special">.</span><span class="identifier">GetString</span><span class="special">()</span> <span class="special">+</span> <span class="identifier">s</span><span class="special">.</span><span class="identifier">GetLength</span><span class="special">(),</span>
            <span class="identifier">e</span><span class="special">,</span>
            <span class="identifier">subs</span><span class="special">,</span>
            <span class="identifier">f</span><span class="special">);</span></code>
          </p>
<p>
            <span class="bold"><strong>Example</strong></span>:
          </p>
<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">enumerate_links2</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">CString</span><span class="special">&amp;</span> <span class="identifier">html</span><span class="special">)</span>
<span class="special">{</span>
   <span class="comment">// enumerate and print all the  links in some HTML text,</span>
   <span class="comment">// the expression used is by Andew Lee on www.regxlib.com:</span>
   <span class="identifier">boost</span><span class="special">::</span><span class="identifier">tregex</span> <span class="identifier">r</span><span class="special">(</span>
         <span class="identifier">__T</span><span class="special">(</span><span class="string">"href=[\"\']((http:\\/\\/|\\.\\/|\\/)?\\w+"</span>
             <span class="string">"(\\.\\w+)*(\\/\\w+(\\.\\w+)?)*"</span>
             <span class="string">"(\\/|\\?\\w*=\\w*(&amp;\\w*=\\w*)*)?)[\"\']"</span><span class="special">));</span>
   <span class="identifier">boost</span><span class="special">::</span><span class="identifier">tregex_token_iterator</span> <span class="identifier">i</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">make_regex_token_iterator</span><span class="special">(</span><span class="identifier">html</span><span class="special">,</span> <span class="identifier">r</span><span class="special">,</span> <span class="number">1</span><span class="special">)),</span> <span class="identifier">j</span><span class="special">;</span>
   <span class="keyword">while</span><span class="special">(</span><span class="identifier">i</span> <span class="special">!=</span> <span class="identifier">j</span><span class="special">)</span>
   <span class="special">{</span>
      <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="special">*</span><span class="identifier">i</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
      <span class="special">++</span><span class="identifier">i</span><span class="special">;</span>
   <span class="special">}</span>
<span class="special">}</span>
</pre>
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<td align="right"><div class="copyright-footer">Copyright &#169; 1998-2010 John Maddock<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        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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