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  26 <div class="titlepage"><div><div><h5 class="title">
  27 <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
  28           Algorithms For MFC String Types</a>
  29 </h5></div></div></div>
  30 <p>
  31             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
  32             one overloaded for the MFC/ATL string types. These algorithm signatures
  33             all look a lot more complex than they actually are, but for completeness
  34             here they are anyway:
  35           </p>
  36 <h5>
  37 <a name="boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.h0"></a>
  38             <span class="phrase"><a name="boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.regex_match"></a></span><a class="link" href="mfc_algo.html#boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.regex_match">regex_match</a>
  39           </h5>
  40 <p>
  41             There are two overloads, the first reports what matched in a match_results
  42             structure, the second does not.
  43           </p>
  44 <p>
  45             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
  46             the algorithm will only report a successful match if all of the input
  47             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>
  48             instead.
  49           </p>
  50 <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>
  51 <span class="keyword">bool</span> <span class="identifier">regex_match</span><span class="special">(</span>
  52    <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>
  53    <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>
  54    <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>
  55    <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>
  56 </pre>
  57 <p>
  58             <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>
  59             <span class="identifier">s</span><span class="special">.</span><span class="identifier">GetString</span><span class="special">()</span>
  60             <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>
  61           </p>
  62 <p>
  63             <span class="bold"><strong>Example:</strong></span>
  64           </p>
  65 <pre class="programlisting"><span class="comment">//</span>
  66 <span class="comment">// Extract filename part of a path from a CString and return the result</span>
  67 <span class="comment">// as another CString:</span>
  68 <span class="comment">//</span>
  69 <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>
  70 <span class="special">{</span>
  71    <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>
  72    <span class="identifier">boost</span><span class="special">::</span><span class="identifier">tmatch</span> <span class="identifier">what</span><span class="special">;</span>
  73    <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>
  74    <span class="special">{</span>
  75       <span class="comment">// extract $1 as a CString:</span>
  76       <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>
  77    <span class="special">}</span>
  78    <span class="keyword">else</span>
  79    <span class="special">{</span>
  80       <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>
  81    <span class="special">}</span>
  82 <span class="special">}</span>
  83 </pre>
  84 <h5>
  85 <a name="boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.h1"></a>
  86             <span class="phrase"><a name="boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.regex_match_second_overload"></a></span><a class="link" href="mfc_algo.html#boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.regex_match_second_overload">regex_match
  87             (second overload)</a>
  88           </h5>
  89 <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>
  90 <span class="keyword">bool</span> <span class="identifier">regex_match</span><span class="special">(</span>
  91    <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>
  92    <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>
  93    <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>
  94 </pre>
  95 <p>
  96             <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>
  97             <span class="identifier">s</span><span class="special">.</span><span class="identifier">GetString</span><span class="special">()</span>
  98             <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>
  99           </p>
 100 <p>
 101             <span class="bold"><strong>Example:</strong></span>
 102           </p>
 103 <pre class="programlisting"><span class="comment">//</span>
 104 <span class="comment">// Find out if *password* meets our password requirements,</span>
 105 <span class="comment">// as defined by the regular expression *requirements*.</span>
 106 <span class="comment">//</span>
 107 <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>
 108 <span class="special">{</span>
 109    <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>
 110 <span class="special">}</span>
 111 </pre>
 112 <h5>
 113 <a name="boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.h2"></a>
 114             <span class="phrase"><a name="boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.regex_search"></a></span><a class="link" href="mfc_algo.html#boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.regex_search">regex_search</a>
 115           </h5>
 116 <p>
 117             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
 118             what matched the second does not:
 119           </p>
 120 <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>
 121 <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>
 122                   <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>
 123                   <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>
 124                   <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>
 125 </pre>
 126 <p>
 127             <span class="bold"><strong>Effects</strong></span>: returns ::boost::regex_search(s.GetString(),
 128             s.GetString() + s.GetLength(), what, e, f);
 129           </p>
 130 <p>
 131             <span class="bold"><strong>Example</strong></span>: Postcode extraction from an
 132             address string.
 133           </p>
 134 <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>
 135 <span class="special">{</span>
 136    <span class="comment">// searches throw address for a UK postcode and returns the result,</span>
 137    <span class="comment">// the expression used is by Phil A. on www.regxlib.com:</span>
 138    <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>
 139    <span class="identifier">boost</span><span class="special">::</span><span class="identifier">tmatch</span> <span class="identifier">what</span><span class="special">;</span>
 140    <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>
 141    <span class="special">{</span>
 142       <span class="comment">// extract $0 as a CString:</span>
 143       <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>
 144    <span class="special">}</span>
 145    <span class="keyword">else</span>
 146    <span class="special">{</span>
 147       <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>
 148    <span class="special">}</span>
 149 <span class="special">}</span>
 150 </pre>
 151 <h5>
 152 <a name="boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.h3"></a>
 153             <span class="phrase"><a name="boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.regex_search_second_overload"></a></span><a class="link" href="mfc_algo.html#boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.regex_search_second_overload">regex_search
 154             (second overload)</a>
 155           </h5>
 156 <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>
 157 <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>
 158                <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>
 159                <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>
 160 </pre>
 161 <p>
 162             <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>
 163             <span class="identifier">s</span><span class="special">.</span><span class="identifier">GetString</span><span class="special">()</span>
 164             <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>
 165           </p>
 166 <h5>
 167 <a name="boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.h4"></a>
 168             <span class="phrase"><a name="boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.regex_replace"></a></span><a class="link" href="mfc_algo.html#boost_regex.ref.non_std_strings.mfc_strings.mfc_algo.regex_replace">regex_replace</a>
 169           </h5>
 170 <p>
 171             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
 172             output to an output iterator, while the second creates a new string
 173           </p>
 174 <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>
 175          <span class="identifier">charT</span><span class="special">&gt;</span>
 176 <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>
 177                            <span class="identifier">BidirectionalIterator</span> <span class="identifier">first</span><span class="special">,</span>
 178                            <span class="identifier">BidirectionalIterator</span> <span class="identifier">last</span><span class="special">,</span>
 179                            <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>
 180                            <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>
 181                            <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>
 182 </pre>
 183 <p>
 184             <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>
 185             <span class="identifier">flags</span><span class="special">);</span></code>
 186           </p>
 187 <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>
 188 <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>
 189                            <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>
 190                            <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>
 191                            <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>
 192 </pre>
 193 <p>
 194             <span class="bold"><strong>Effects</strong></span>: returns a new string created
 195             using <a class="link" href="../../regex_replace.html" title="regex_replace"><code class="computeroutput"><span class="identifier">regex_replace</span></code></a>,
 196             and the same memory manager as string <span class="emphasis"><em>s</em></span>.
 197           </p>
 198 <p>
 199             <span class="bold"><strong>Example</strong></span>:
 200           </p>
 201 <pre class="programlisting"><span class="comment">//</span>
 202 <span class="comment">// Take a credit card number as a string of digits, </span>
 203 <span class="comment">// and reformat it as a human readable string with "-"</span>
 204 <span class="comment">// separating each group of four digits:</span>
 205 <span class="comment">//</span>
 206 <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>
 207 <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>
 208
 209 <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>
 210 <span class="special">{</span>
 211    <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>
 212 <span class="special">}</span>
 213 </pre>
 214 </div>
 215 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 216 <td align="left"></td>
 217 <td align="right"><div class="copyright-footer">Copyright &#169; 1998-2013 John Maddock<p>
 218         Distributed under the Boost Software License, Version 1.0. (See accompanying
 219         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>)
 220       </p>
 221 </div></td>
 222 </tr></table>
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