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| <div class="titlepage"><div><div><h5 class="title"> |
| <a name="boost_regex.ref.non_std_strings.icu.unicode_types"></a><a class="link" href="unicode_types.html" title="Unicode regular expression types"> |
| Unicode regular expression types</a> |
| </h5></div></div></div> |
| <p> |
| Header <code class="computeroutput"><span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">regex</span><span class="special">/</span><span class="identifier">icu</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code> provides a regular expression traits |
| class that handles UTF-32 characters: |
| </p> |
| <pre class="programlisting"><span class="keyword">class</span> <span class="identifier">icu_regex_traits</span><span class="special">;</span> |
| </pre> |
| <p> |
| and a regular expression type based upon that: |
| </p> |
| <pre class="programlisting"><span class="keyword">typedef</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">UChar32</span><span class="special">,</span><span class="identifier">icu_regex_traits</span><span class="special">></span> <span class="identifier">u32regex</span><span class="special">;</span> |
| </pre> |
| <p> |
| The type <code class="computeroutput"><span class="identifier">u32regex</span></code> is |
| regular expression type to use for all Unicode regular expressions; internally |
| it uses UTF-32 code points, but can be created from, and used to search, |
| either UTF-8, or UTF-16 encoded strings as well as UTF-32 ones. |
| </p> |
| <p> |
| The constructors, and assign member functions of <code class="computeroutput"><span class="identifier">u32regex</span></code>, |
| require UTF-32 encoded strings, but there are a series of overloaded |
| algorithms called <code class="computeroutput"><span class="identifier">make_u32regex</span></code> |
| which allow regular expressions to be created from UTF-8, UTF-16, or |
| UTF-32 encoded strings: |
| </p> |
| <pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">InputIterator</span><span class="special">></span> |
| <span class="identifier">u32regex</span> <span class="identifier">make_u32regex</span><span class="special">(</span><span class="identifier">InputIterator</span> <span class="identifier">i</span><span class="special">,</span> |
| <span class="identifier">InputIterator</span> <span class="identifier">j</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">syntax_option_type</span> <span class="identifier">opt</span><span class="special">);</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Effects</strong></span>: Creates a regular expression |
| object from the iterator sequence [i,j). The character encoding of the |
| sequence is determined based upon sizeof(*i): 1 implies UTF-8, 2 implies |
| UTF-16, and 4 implies UTF-32. |
| </p> |
| <pre class="programlisting"><span class="identifier">u32regex</span> <span class="identifier">make_u32regex</span><span class="special">(</span><span class="keyword">const</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">p</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">syntax_option_type</span> <span class="identifier">opt</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">perl</span><span class="special">);</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Effects</strong></span>: Creates a regular expression |
| object from the Null-terminated UTF-8 characater sequence <span class="emphasis"><em>p</em></span>. |
| </p> |
| <pre class="programlisting"><span class="identifier">u32regex</span> <span class="identifier">make_u32regex</span><span class="special">(</span><span class="keyword">const</span> <span class="keyword">unsigned</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">p</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">syntax_option_type</span> <span class="identifier">opt</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">perl</span><span class="special">);</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Effects</strong></span>: Creates a regular expression |
| object from the Null-terminated UTF-8 characater sequence p. |
| </p> |
| <pre class="programlisting"><span class="identifier">u32regex</span> <span class="identifier">make_u32regex</span><span class="special">(</span><span class="keyword">const</span> <span class="keyword">wchar_t</span><span class="special">*</span> <span class="identifier">p</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">syntax_option_type</span> <span class="identifier">opt</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">perl</span><span class="special">);</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Effects</strong></span>: Creates a regular expression |
| object from the Null-terminated characater sequence p. The character |
| encoding of the sequence is determined based upon sizeof(wchar_t): 1 |
| implies UTF-8, 2 implies UTF-16, and 4 implies UTF-32. |
| </p> |
| <pre class="programlisting"><span class="identifier">u32regex</span> <span class="identifier">make_u32regex</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">UChar</span><span class="special">*</span> <span class="identifier">p</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">syntax_option_type</span> <span class="identifier">opt</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">perl</span><span class="special">);</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Effects</strong></span>: Creates a regular expression |
| object from the Null-terminated UTF-16 characater sequence p. |
| </p> |
| <pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">C</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">></span> |
| <span class="identifier">u32regex</span> <span class="identifier">make_u32regex</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">C</span><span class="special">,</span> <span class="identifier">T</span><span class="special">,</span> <span class="identifier">A</span><span class="special">>&</span> <span class="identifier">s</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">syntax_option_type</span> <span class="identifier">opt</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">perl</span><span class="special">);</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Effects</strong></span>: Creates a regular expression |
| object from the string s. The character encoding of the string is determined |
| based upon sizeof(C): 1 implies UTF-8, 2 implies UTF-16, and 4 implies |
| UTF-32. |
| </p> |
| <pre class="programlisting"><span class="identifier">u32regex</span> <span class="identifier">make_u32regex</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">UnicodeString</span><span class="special">&</span> <span class="identifier">s</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">syntax_option_type</span> <span class="identifier">opt</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">perl</span><span class="special">);</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Effects</strong></span>: Creates a regular expression |
| object from the UTF-16 encoding string s. |
| </p> |
| </div> |
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| <td align="right"><div class="copyright-footer">Copyright © 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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