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<div class="titlepage"><div><div><h5 class="title">
<a name="boost_regex.ref.non_std_strings.mfc_strings.mfc_algo"></a><a class="link" href="mfc_algo.html" title="Overloaded Algorithms For MFC String Types">
Overloaded Algorithms For MFC String Types</a>
</h5></div></div></div>
<p>
For each regular expression algorithm that's overloaded for a <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span></code> argument, there is also
one overloaded for the MFC/ATL string types. These algorithm signatures
all look a lot more complex than they actually are, but for completeness
here they are anyway:
</p>
<a name="boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.regex_match"></a><h5>
<a name="id1031820"></a>
<a class="link" href="mfc_algo.html#boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.regex_match">regex_match</a>
</h5>
<p>
There are two overloads, the first reports what matched in a match_results
structure, the second does not.
</p>
<p>
All the usual caveats for <a class="link" href="../../regex_match.html" title="regex_match"><code class="computeroutput"><span class="identifier">regex_match</span></code></a> apply, in particular
the algorithm will only report a successful match if all of the input
text matches the expression, if this isn't what you want then use <a class="link" href="../../regex_search.html" title="regex_search"><code class="computeroutput"><span class="identifier">regex_search</span></code></a>
instead.
</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="keyword">class</span> <span class="identifier">T</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">A</span><span class="special">&gt;</span>
<span class="keyword">bool</span> <span class="identifier">regex_match</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="identifier">match_results</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="identifier">B</span><span class="special">*,</span> <span class="identifier">A</span><span class="special">&gt;&amp;</span> <span class="identifier">what</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">,</span> <span class="identifier">T</span><span class="special">&gt;&amp;</span> <span class="identifier">e</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="special">::</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex_match</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">what</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="comment">//
</span><span class="comment">// Extract filename part of a path from a CString and return the result
</span><span class="comment">// as another CString:
</span><span class="comment">//
</span><span class="identifier">CString</span> <span class="identifier">get_filename</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">CString</span><span class="special">&amp;</span> <span class="identifier">path</span><span class="special">)</span>
<span class="special">{</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">"(?:\\A|.*\\\\)([^\\\\]+)"</span><span class="special">));</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">tmatch</span> <span class="identifier">what</span><span class="special">;</span>
<span class="keyword">if</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex_match</span><span class="special">(</span><span class="identifier">path</span><span class="special">,</span> <span class="identifier">what</span><span class="special">,</span> <span class="identifier">r</span><span class="special">))</span>
<span class="special">{</span>
<span class="comment">// extract $1 as a CString:
</span> <span class="keyword">return</span> <span class="identifier">CString</span><span class="special">(</span><span class="identifier">what</span><span class="special">[</span><span class="number">1</span><span class="special">].</span><span class="identifier">first</span><span class="special">,</span> <span class="identifier">what</span><span class="special">.</span><span class="identifier">length</span><span class="special">(</span><span class="number">1</span><span class="special">));</span>
<span class="special">}</span>
<span class="keyword">else</span>
<span class="special">{</span>
<span class="keyword">throw</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">runtime_error</span><span class="special">(</span><span class="string">"Invalid pathname"</span><span class="special">);</span>
<span class="special">}</span>
<span class="special">}</span>
</pre>
<a name="boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.regex_match__second_overload_"></a><h5>
<a name="id1032478"></a>
<a class="link" href="mfc_algo.html#boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.regex_match__second_overload_">regex_match
(second overload)</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">,</span> <span class="keyword">class</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="keyword">bool</span> <span class="identifier">regex_match</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">B</span><span class="special">,</span> <span class="identifier">T</span><span class="special">&gt;&amp;</span> <span class="identifier">e</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="special">::</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex_match</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="comment">//
</span><span class="comment">// Find out if *password* meets our password requirements,
</span><span class="comment">// as defined by the regular expression *requirements*.
</span><span class="comment">//
</span><span class="keyword">bool</span> <span class="identifier">is_valid_password</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">CString</span><span class="special">&amp;</span> <span class="identifier">password</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">CString</span><span class="special">&amp;</span> <span class="identifier">requirements</span><span class="special">)</span>
<span class="special">{</span>
<span class="keyword">return</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex_match</span><span class="special">(</span><span class="identifier">password</span><span class="special">,</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">make_regex</span><span class="special">(</span><span class="identifier">requirements</span><span class="special">));</span>
<span class="special">}</span>
</pre>
<a name="boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.regex_search"></a><h5>
<a name="id1034694"></a>
<a class="link" href="mfc_algo.html#boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.regex_search">regex_search</a>
</h5>
<p>
There are two additional overloads for <a class="link" href="../../regex_search.html" title="regex_search"><code class="computeroutput"><span class="identifier">regex_search</span></code></a>, the first reports
what matched the second does not:
</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="keyword">class</span> <span class="identifier">A</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="keyword">bool</span> <span class="identifier">regex_search</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="identifier">match_results</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*,</span> <span class="identifier">A</span><span class="special">&gt;&amp;</span> <span class="identifier">what</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">,</span> <span class="identifier">T</span><span class="special">&gt;&amp;</span> <span class="identifier">e</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 ::boost::regex_search(s.GetString(),
s.GetString() + s.GetLength(), what, e, f);
</p>
<p>
<span class="bold"><strong>Example</strong></span>: Postcode extraction from an
address string.
</p>
<pre class="programlisting"><span class="identifier">CString</span> <span class="identifier">extract_postcode</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">CString</span><span class="special">&amp;</span> <span class="identifier">address</span><span class="special">)</span>
<span class="special">{</span>
<span class="comment">// searches throw address for a UK postcode and returns the result,
</span> <span class="comment">// the expression used is by Phil A. 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">"^(([A-Z]{1,2}[0-9]{1,2})|([A-Z]{1,2}[0-9][A-Z]))\\s?([0-9][A-Z]{2})$"</span><span class="special">));</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">tmatch</span> <span class="identifier">what</span><span class="special">;</span>
<span class="keyword">if</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex_search</span><span class="special">(</span><span class="identifier">address</span><span class="special">,</span> <span class="identifier">what</span><span class="special">,</span> <span class="identifier">r</span><span class="special">))</span>
<span class="special">{</span>
<span class="comment">// extract $0 as a CString:
</span> <span class="keyword">return</span> <span class="identifier">CString</span><span class="special">(</span><span class="identifier">what</span><span class="special">[</span><span class="number">0</span><span class="special">].</span><span class="identifier">first</span><span class="special">,</span> <span class="identifier">what</span><span class="special">.</span><span class="identifier">length</span><span class="special">());</span>
<span class="special">}</span>
<span class="keyword">else</span>
<span class="special">{</span>
<span class="keyword">throw</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">runtime_error</span><span class="special">(</span><span class="string">"No postcode found"</span><span class="special">);</span>
<span class="special">}</span>
<span class="special">}</span>
</pre>
<a name="boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.regex_search__second_overload_"></a><h5>
<a name="id1035229"></a>
<a class="link" href="mfc_algo.html#boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.regex_search__second_overload_">regex_search
(second overload)</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">,</span> <span class="keyword">class</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">bool</span> <span class="identifier">regex_search</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">,</span> <span class="identifier">T</span><span class="special">&gt;&amp;</span> <span class="identifier">e</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="special">::</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex_search</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>
<a name="boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.regex_replace"></a><h5>
<a name="id1035520"></a>
<a class="link" href="mfc_algo.html#boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.regex_replace">regex_replace</a>
</h5>
<p>
There are two additional overloads for <a class="link" href="../../regex_replace.html" title="regex_replace"><code class="computeroutput"><span class="identifier">regex_replace</span></code></a>, the first sends
output to an output iterator, while the second creates a new string
</p>
<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">OutputIterator</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">BidirectionalIterator</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">traits</span><span class="special">,</span> <span class="keyword">class</span>
<span class="identifier">charT</span><span class="special">&gt;</span>
<span class="identifier">OutputIterator</span> <span class="identifier">regex_replace</span><span class="special">(</span><span class="identifier">OutputIterator</span> <span class="identifier">out</span><span class="special">,</span>
<span class="identifier">BidirectionalIterator</span> <span class="identifier">first</span><span class="special">,</span>
<span class="identifier">BidirectionalIterator</span> <span class="identifier">last</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">,</span> <span class="identifier">traits</span><span class="special">&gt;&amp;</span> <span class="identifier">e</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">fmt</span><span class="special">,</span>
<span class="identifier">match_flag_type</span> <span class="identifier">flags</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="special">::</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex_replace</span><span class="special">(</span><span class="identifier">out</span><span class="special">,</span> <span class="identifier">first</span><span class="special">,</span> <span class="identifier">last</span><span class="special">,</span> <span class="identifier">e</span><span class="special">,</span> <span class="identifier">fmt</span><span class="special">.</span><span class="identifier">GetString</span><span class="special">(),</span>
<span class="identifier">flags</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">traits</span><span class="special">,</span> <span class="identifier">charT</span><span class="special">&gt;</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;</span> <span class="identifier">regex_replace</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">,</span> <span class="identifier">traits</span><span class="special">&gt;&amp;</span> <span class="identifier">e</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">fmt</span><span class="special">,</span>
<span class="identifier">match_flag_type</span> <span class="identifier">flags</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 a new string created
using <a class="link" href="../../regex_replace.html" title="regex_replace"><code class="computeroutput"><span class="identifier">regex_replace</span></code></a>,
and the same memory manager as string <span class="emphasis"><em>s</em></span>.
</p>
<p>
<span class="bold"><strong>Example</strong></span>:
</p>
<pre class="programlisting"><span class="comment">//
</span><span class="comment">// Take a credit card number as a string of digits,
</span><span class="comment">// and reformat it as a human readable string with "-"
</span><span class="comment">// separating each group of four digits:
</span><span class="comment">//
</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">tregex</span> <span class="identifier">e</span><span class="special">(</span><span class="identifier">__T</span><span class="special">(</span><span class="string">"\\A(\\d{3,4})[- ]?(\\d{4})[- ]?(\\d{4})[- ]?(\\d{4})\\z"</span><span class="special">));</span>
<span class="keyword">const</span> <span class="identifier">CString</span> <span class="identifier">human_format</span> <span class="special">=</span> <span class="identifier">__T</span><span class="special">(</span><span class="string">"$1-$2-$3-$4"</span><span class="special">);</span>
<span class="identifier">CString</span> <span class="identifier">human_readable_card_number</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">CString</span><span class="special">&amp;</span> <span class="identifier">s</span><span class="special">)</span>
<span class="special">{</span>
<span class="keyword">return</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex_replace</span><span class="special">(</span><span class="identifier">s</span><span class="special">,</span> <span class="identifier">e</span><span class="special">,</span> <span class="identifier">human_format</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>
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