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26 <div class="titlepage"><div><div><h5 class="title">
27 <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
28 regular expression types</a>
29 </h5></div></div></div>
31 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
32 class that handles UTF-32 characters:
34 <pre class="programlisting"><span class="keyword">class</span> <span class="identifier">icu_regex_traits</span><span class="special">;</span>
37 and a regular expression type based upon that:
39 <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>
42 The type <code class="computeroutput"><span class="identifier">u32regex</span></code> is
43 regular expression type to use for all Unicode regular expressions; internally
44 it uses UTF-32 code points, but can be created from, and used to search,
45 either UTF-8, or UTF-16 encoded strings as well as UTF-32 ones.
48 The constructors, and assign member functions of <code class="computeroutput"><span class="identifier">u32regex</span></code>,
49 require UTF-32 encoded strings, but there are a series of overloaded
50 algorithms called <code class="computeroutput"><span class="identifier">make_u32regex</span></code>
51 which allow regular expressions to be created from UTF-8, UTF-16, or
52 UTF-32 encoded strings:
54 <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>
55 <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>
56 <span class="identifier">InputIterator</span> <span class="identifier">j</span><span class="special">,</span>
57 <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>
60 <span class="bold"><strong>Effects</strong></span>: Creates a regular expression
61 object from the iterator sequence [i,j). The character encoding of the
62 sequence is determined based upon sizeof(*i): 1 implies UTF-8, 2 implies
63 UTF-16, and 4 implies UTF-32.
65 <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>
66 <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>
67 <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>
70 <span class="bold"><strong>Effects</strong></span>: Creates a regular expression
71 object from the Null-terminated UTF-8 character sequence <span class="emphasis"><em>p</em></span>.
73 <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>
74 <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>
75 <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>
78 <span class="bold"><strong>Effects</strong></span>: Creates a regular expression
79 object from the Null-terminated UTF-8 character sequence p.
81 <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>
82 <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>
83 <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>
86 <span class="bold"><strong>Effects</strong></span>: Creates a regular expression
87 object from the Null-terminated character sequence p. The character encoding
88 of the sequence is determined based upon sizeof(wchar_t): 1 implies UTF-8,
89 2 implies UTF-16, and 4 implies UTF-32.
91 <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>
92 <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>
93 <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>
96 <span class="bold"><strong>Effects</strong></span>: Creates a regular expression
97 object from the Null-terminated UTF-16 character sequence p.
99 <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>
100 <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>
101 <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>
102 <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>
105 <span class="bold"><strong>Effects</strong></span>: Creates a regular expression
106 object from the string s. The character encoding of the string is determined
107 based upon sizeof(C): 1 implies UTF-8, 2 implies UTF-16, and 4 implies
110 <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>
111 <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>
112 <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>
115 <span class="bold"><strong>Effects</strong></span>: Creates a regular expression
116 object from the UTF-16 encoding string s.
119 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
120 <td align="left"></td>
121 <td align="right"><div class="copyright-footer">Copyright © 1998-2013 John Maddock<p>
122 Distributed under the Boost Software License, Version 1.0. (See accompanying
123 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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