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4<title>Overloaded Algorithms For MFC String Types</title>
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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 © 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>
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