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26 | <div class="titlepage"><div><div><h3 class="title"> | |
27 | <a name="boost_regex.ref.regex_token_iterator"></a><a class="link" href="regex_token_iterator.html" title="regex_token_iterator">regex_token_iterator</a> | |
28 | </h3></div></div></div> | |
29 | <p> | |
30 | The template class <a class="link" href="regex_token_iterator.html" title="regex_token_iterator"><code class="computeroutput"><span class="identifier">regex_token_iterator</span></code></a> is an iterator | |
31 | adapter; that is to say it represents a new view of an existing iterator | |
32 | sequence, by enumerating all the occurrences of a regular expression within | |
33 | that sequence, and presenting one or more character sequence for each match | |
34 | found. Each position enumerated by the iterator is a <a class="link" href="sub_match.html" title="sub_match"><code class="computeroutput"><span class="identifier">sub_match</span></code></a> object that represents | |
35 | what matched a particular sub-expression within the regular expression. When | |
36 | class <a class="link" href="regex_token_iterator.html" title="regex_token_iterator"><code class="computeroutput"><span class="identifier">regex_token_iterator</span></code></a> is used to | |
37 | enumerate a single sub-expression with index -1, then the iterator performs | |
38 | field splitting: that is to say it enumerates one character sequence for | |
39 | each section of the character container sequence that does not match the | |
40 | regular expression specified. | |
41 | </p> | |
42 | <pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">BidirectionalIterator</span><span class="special">,</span> | |
43 | <span class="keyword">class</span> <span class="identifier">charT</span> <span class="special">=</span> <span class="identifier">iterator_traits</span><span class="special"><</span><span class="identifier">BidirectionalIterator</span><span class="special">>::</span><span class="identifier">value_type</span><span class="special">,</span> | |
44 | <span class="keyword">class</span> <span class="identifier">traits</span> <span class="special">=</span> <span class="identifier">regex_traits</span><span class="special"><</span><span class="identifier">charT</span><span class="special">></span> <span class="special">></span> | |
45 | <span class="keyword">class</span> <span class="identifier">regex_token_iterator</span> | |
46 | <span class="special">{</span> | |
47 | <span class="keyword">public</span><span class="special">:</span> | |
48 | <span class="keyword">typedef</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> <span class="identifier">regex_type</span><span class="special">;</span> | |
49 | <span class="keyword">typedef</span> <span class="identifier">sub_match</span><span class="special"><</span><span class="identifier">BidirectionalIterator</span><span class="special">></span> <span class="identifier">value_type</span><span class="special">;</span> | |
50 | <span class="keyword">typedef</span> <span class="keyword">typename</span> <span class="identifier">iterator_traits</span><span class="special"><</span><span class="identifier">BidirectionalIterator</span><span class="special">>::</span><span class="identifier">difference_type</span> <span class="identifier">difference_type</span><span class="special">;</span> | |
51 | <span class="keyword">typedef</span> <span class="keyword">const</span> <span class="identifier">value_type</span><span class="special">*</span> <span class="identifier">pointer</span><span class="special">;</span> | |
52 | <span class="keyword">typedef</span> <span class="keyword">const</span> <span class="identifier">value_type</span><span class="special">&</span> <span class="identifier">reference</span><span class="special">;</span> | |
53 | <span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">forward_iterator_tag</span> <span class="identifier">iterator_category</span><span class="special">;</span> | |
54 | ||
55 | <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.construct1">regex_token_iterator</a><span class="special">();</span> | |
56 | <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.construct2">regex_token_iterator</a><span class="special">(</span><span class="identifier">BidirectionalIterator</span> <span class="identifier">a</span><span class="special">,</span> | |
57 | <span class="identifier">BidirectionalIterator</span> <span class="identifier">b</span><span class="special">,</span> | |
58 | <span class="keyword">const</span> <span class="identifier">regex_type</span><span class="special">&</span> <span class="identifier">re</span><span class="special">,</span> | |
59 | <span class="keyword">int</span> <span class="identifier">submatch</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> | |
60 | <span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">match_default</span><span class="special">);</span> | |
61 | <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.construct3">regex_token_iterator</a><span class="special">(</span><span class="identifier">BidirectionalIterator</span> <span class="identifier">a</span><span class="special">,</span> | |
62 | <span class="identifier">BidirectionalIterator</span> <span class="identifier">b</span><span class="special">,</span> | |
63 | <span class="keyword">const</span> <span class="identifier">regex_type</span><span class="special">&</span> <span class="identifier">re</span><span class="special">,</span> | |
64 | <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="keyword">int</span><span class="special">>&</span> <span class="identifier">submatches</span><span class="special">,</span> | |
65 | <span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">match_default</span><span class="special">);</span> | |
66 | <span class="keyword">template</span> <span class="special"><</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">N</span><span class="special">></span> | |
67 | <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.construct4">regex_token_iterator</a><span class="special">(</span><span class="identifier">BidirectionalIterator</span> <span class="identifier">a</span><span class="special">,</span> | |
68 | <span class="identifier">BidirectionalIterator</span> <span class="identifier">b</span><span class="special">,</span> | |
69 | <span class="keyword">const</span> <span class="identifier">regex_type</span><span class="special">&</span> <span class="identifier">re</span><span class="special">,</span> | |
70 | <span class="keyword">const</span> <span class="keyword">int</span> <span class="special">(&</span><span class="identifier">submatches</span><span class="special">)[</span><span class="identifier">N</span><span class="special">],</span> | |
71 | <span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">match_default</span><span class="special">);</span> | |
72 | <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.construct5">regex_token_iterator</a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">regex_token_iterator</span><span class="special">&);</span> | |
73 | <span class="identifier">regex_token_iterator</span><span class="special">&</span> <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.assign">operator=</a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">regex_token_iterator</span><span class="special">&);</span> | |
74 | <span class="keyword">bool</span> <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.op_eq">operator==</a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">regex_token_iterator</span><span class="special">&)</span><span class="keyword">const</span><span class="special">;</span> | |
75 | <span class="keyword">bool</span> <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.op_ne">operator!=</a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">regex_token_iterator</span><span class="special">&)</span><span class="keyword">const</span><span class="special">;</span> | |
76 | <span class="keyword">const</span> <span class="identifier">value_type</span><span class="special">&</span> <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.op_deref">operator*</a><span class="special">()</span><span class="keyword">const</span><span class="special">;</span> | |
77 | <span class="keyword">const</span> <span class="identifier">value_type</span><span class="special">*</span> <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.op_arrow">operator-></a><span class="special">()</span><span class="keyword">const</span><span class="special">;</span> | |
78 | <span class="identifier">regex_token_iterator</span><span class="special">&</span> <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.op_inc1">operator++</a><span class="special">();</span> | |
79 | <span class="identifier">regex_token_iterator</span> <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.op_inc2">operator++</a><span class="special">(</span><span class="keyword">int</span><span class="special">);</span> | |
80 | <span class="special">};</span> | |
81 | ||
82 | <span class="keyword">typedef</span> <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="keyword">const</span> <span class="keyword">char</span><span class="special">*></span> <span class="identifier">cregex_token_iterator</span><span class="special">;</span> | |
83 | <span class="keyword">typedef</span> <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">::</span><span class="identifier">const_iterator</span><span class="special">></span> <span class="identifier">sregex_token_iterator</span><span class="special">;</span> | |
84 | <span class="preprocessor">#ifndef</span> <span class="identifier">BOOST_NO_WREGEX</span> | |
85 | <span class="keyword">typedef</span> <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="keyword">const</span> <span class="keyword">wchar_t</span><span class="special">*></span> <span class="identifier">wcregex_token_iterator</span><span class="special">;</span> | |
86 | <span class="keyword">typedef</span> <span class="identifier">regex_token_iterator</span><span class="special"><<</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">wstring</span><span class="special">::</span><span class="identifier">const_iterator</span><span class="special">></span> <span class="identifier">wsregex_token_iterator</span><span class="special">;</span> | |
87 | <span class="preprocessor">#endif</span> | |
88 | ||
89 | <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">traits</span><span class="special">></span> | |
90 | <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> | |
91 | <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.make">make_regex_token_iterator</a><span class="special">(</span> | |
92 | <span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*</span> <span class="identifier">p</span><span class="special">,</span> | |
93 | <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> | |
94 | <span class="keyword">int</span> <span class="identifier">submatch</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> | |
95 | <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</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> | |
96 | ||
97 | <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</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">ST</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">SA</span><span class="special">></span> | |
98 | <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>::</span><span class="identifier">const_iterator</span><span class="special">,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> | |
99 | <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.make">make_regex_token_iterator</a><span class="special">(</span> | |
100 | <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">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>&</span> <span class="identifier">p</span><span class="special">,</span> | |
101 | <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> | |
102 | <span class="keyword">int</span> <span class="identifier">submatch</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> | |
103 | <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</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> | |
104 | ||
105 | <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">traits</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">N</span><span class="special">></span> | |
106 | <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> | |
107 | <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.make">make_regex_token_iterator</a><span class="special">(</span> | |
108 | <span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*</span> <span class="identifier">p</span><span class="special">,</span> | |
109 | <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> | |
110 | <span class="keyword">const</span> <span class="keyword">int</span> <span class="special">(&</span><span class="identifier">submatch</span><span class="special">)[</span><span class="identifier">N</span><span class="special">],</span> | |
111 | <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</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> | |
112 | ||
113 | <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</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">ST</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">SA</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">N</span><span class="special">></span> | |
114 | <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>::</span><span class="identifier">const_iterator</span><span class="special">,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> | |
115 | <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.make">make_regex_token_iterator</a><span class="special">(</span> | |
116 | <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">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>&</span> <span class="identifier">p</span><span class="special">,</span> | |
117 | <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> | |
118 | <span class="keyword">const</span> <span class="keyword">int</span> <span class="special">(&</span><span class="identifier">submatch</span><span class="special">)[</span><span class="identifier">N</span><span class="special">],</span> | |
119 | <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</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> | |
120 | ||
121 | <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">traits</span><span class="special">></span> | |
122 | <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> | |
123 | <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.make">make_regex_token_iterator</a><span class="special">(</span> | |
124 | <span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*</span> <span class="identifier">p</span><span class="special">,</span> | |
125 | <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> | |
126 | <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="keyword">int</span><span class="special">>&</span> <span class="identifier">submatch</span><span class="special">,</span> | |
127 | <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</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> | |
128 | ||
129 | <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</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">ST</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">SA</span><span class="special">></span> | |
130 | <span class="identifier">regex_token_iterator</span><span class="special"><</span> | |
131 | <span class="keyword">typename</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>::</span><span class="identifier">const_iterator</span><span class="special">,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> | |
132 | <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.make">make_regex_token_iterator</a><span class="special">(</span> | |
133 | <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">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>&</span> <span class="identifier">p</span><span class="special">,</span> | |
134 | <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> | |
135 | <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="keyword">int</span><span class="special">>&</span> <span class="identifier">submatch</span><span class="special">,</span> | |
136 | <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</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> | |
137 | </pre> | |
138 | <h5> | |
139 | <a name="boost_regex.ref.regex_token_iterator.h0"></a> | |
140 | <span class="phrase"><a name="boost_regex.ref.regex_token_iterator.description"></a></span><a class="link" href="regex_token_iterator.html#boost_regex.ref.regex_token_iterator.description">Description</a> | |
141 | </h5> | |
142 | <a name="boost_regex.regex_token_iterator.construct1"></a><pre class="programlisting"><span class="identifier">regex_token_iterator</span><span class="special">();</span> | |
143 | </pre> | |
144 | <p> | |
145 | <span class="bold"><strong>Effects</strong></span>: constructs an end of sequence iterator. | |
146 | </p> | |
147 | <a name="boost_regex.regex_token_iterator.construct2"></a><pre class="programlisting"><span class="identifier">regex_token_iterator</span><span class="special">(</span><span class="identifier">BidirectionalIterator</span> <span class="identifier">a</span><span class="special">,</span> | |
148 | <span class="identifier">BidirectionalIterator</span> <span class="identifier">b</span><span class="special">,</span> | |
149 | <span class="keyword">const</span> <span class="identifier">regex_type</span><span class="special">&</span> <span class="identifier">re</span><span class="special">,</span> | |
150 | <span class="keyword">int</span> <span class="identifier">submatch</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> | |
151 | <span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">match_default</span><span class="special">);</span> | |
152 | </pre> | |
153 | <p> | |
154 | <span class="bold"><strong>Preconditions</strong></span>: <code class="computeroutput"><span class="special">!</span><span class="identifier">re</span><span class="special">.</span><span class="identifier">empty</span><span class="special">()</span></code>. Object <span class="emphasis"><em>re</em></span> shall exist | |
155 | for the lifetime of the iterator constructed from it. | |
156 | </p> | |
157 | <p> | |
158 | <span class="bold"><strong>Effects</strong></span>: constructs a <a class="link" href="regex_token_iterator.html" title="regex_token_iterator"><code class="computeroutput"><span class="identifier">regex_token_iterator</span></code></a> that will enumerate | |
159 | one string for each regular expression match of the expression <span class="emphasis"><em>re</em></span> | |
160 | found within the sequence [a,b), using match flags <span class="emphasis"><em>m</em></span> | |
161 | (see <a class="link" href="match_flag_type.html" title="match_flag_type"><code class="computeroutput"><span class="identifier">match_flag_type</span></code></a>). | |
162 | The string enumerated is the sub-expression <span class="emphasis"><em>submatch</em></span> | |
163 | for each match found; if <span class="emphasis"><em>submatch</em></span> is -1, then enumerates | |
164 | all the text sequences that did not match the expression <span class="emphasis"><em>re</em></span> | |
165 | (that is to performs field splitting). | |
166 | </p> | |
167 | <p> | |
168 | <span class="bold"><strong>Throws</strong></span>: <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">runtime_error</span></code> | |
169 | if the complexity of matching the expression against an N character string | |
170 | begins to exceed O(N<sup>2</sup>), or if the program runs out of stack space while matching | |
171 | the expression (if Boost.Regex is configured in recursive mode), or if the | |
172 | matcher exhausts its permitted memory allocation (if Boost.Regex is configured | |
173 | in non-recursive mode). | |
174 | </p> | |
175 | <a name="boost_regex.regex_token_iterator.construct3"></a><pre class="programlisting"><span class="identifier">regex_token_iterator</span><span class="special">(</span><span class="identifier">BidirectionalIterator</span> <span class="identifier">a</span><span class="special">,</span> | |
176 | <span class="identifier">BidirectionalIterator</span> <span class="identifier">b</span><span class="special">,</span> | |
177 | <span class="keyword">const</span> <span class="identifier">regex_type</span><span class="special">&</span> <span class="identifier">re</span><span class="special">,</span> | |
178 | <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="keyword">int</span><span class="special">>&</span> <span class="identifier">submatches</span><span class="special">,</span> | |
179 | <span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">match_default</span><span class="special">);</span> | |
180 | </pre> | |
181 | <p> | |
182 | <span class="bold"><strong>Preconditions</strong></span>: <code class="computeroutput"><span class="identifier">submatches</span><span class="special">.</span><span class="identifier">size</span><span class="special">()</span> | |
183 | <span class="special">&&</span> <span class="special">!</span><span class="identifier">re</span><span class="special">.</span><span class="identifier">empty</span><span class="special">()</span></code>. Object <span class="emphasis"><em>re</em></span> shall exist | |
184 | for the lifetime of the iterator constructed from it. | |
185 | </p> | |
186 | <p> | |
187 | <span class="bold"><strong>Effects</strong></span>: constructs a <a class="link" href="regex_token_iterator.html" title="regex_token_iterator"><code class="computeroutput"><span class="identifier">regex_token_iterator</span></code></a> that will enumerate | |
188 | <code class="computeroutput"><span class="identifier">submatches</span><span class="special">.</span><span class="identifier">size</span><span class="special">()</span></code> | |
189 | strings for each regular expression match of the expression <span class="emphasis"><em>re</em></span> | |
190 | found within the sequence [a,b), using match flags <span class="emphasis"><em>m</em></span> | |
191 | (see <a class="link" href="match_flag_type.html" title="match_flag_type"><code class="computeroutput"><span class="identifier">match_flag_type</span></code></a>). | |
192 | For each match found one string will be enumerated for each sub-expression | |
193 | index contained within submatches vector; if <code class="computeroutput"><span class="identifier">submatches</span><span class="special">[</span><span class="number">0</span><span class="special">]</span></code> | |
194 | is -1, then the first string enumerated for each match will be all of the | |
195 | text from end of the last match to the start of the current match, in addition | |
196 | there will be one extra string enumerated when no more matches can be found: | |
197 | from the end of the last match found, to the end of the underlying sequence. | |
198 | </p> | |
199 | <p> | |
200 | <span class="bold"><strong>Throws</strong></span>: <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">runtime_error</span></code> | |
201 | if the complexity of matching the expression against an N character string | |
202 | begins to exceed O(N<sup>2</sup>), or if the program runs out of stack space while matching | |
203 | the expression (if Boost.Regex is configured in recursive mode), or if the | |
204 | matcher exhausts its permitted memory allocation (if Boost.Regex is configured | |
205 | in non-recursive mode). | |
206 | </p> | |
207 | <a name="boost_regex.regex_token_iterator.construct4"></a><pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">N</span><span class="special">></span> | |
208 | <span class="identifier">regex_token_iterator</span><span class="special">(</span><span class="identifier">BidirectionalIterator</span> <span class="identifier">a</span><span class="special">,</span> | |
209 | <span class="identifier">BidirectionalIterator</span> <span class="identifier">b</span><span class="special">,</span> | |
210 | <span class="keyword">const</span> <span class="identifier">regex_type</span><span class="special">&</span> <span class="identifier">re</span><span class="special">,</span> | |
211 | <span class="keyword">const</span> <span class="keyword">int</span> <span class="special">(&</span><span class="identifier">submatches</span><span class="special">)[</span><span class="identifier">R</span><span class="special">],</span> | |
212 | <span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">match_default</span><span class="special">);</span> | |
213 | </pre> | |
214 | <p> | |
215 | <span class="bold"><strong>Preconditions</strong></span>: <code class="computeroutput"><span class="special">!</span><span class="identifier">re</span><span class="special">.</span><span class="identifier">empty</span><span class="special">()</span></code>. Object <span class="emphasis"><em>re</em></span> shall exist | |
216 | for the lifetime of the iterator constructed from it. | |
217 | </p> | |
218 | <p> | |
219 | <span class="bold"><strong>Effects</strong></span>: constructs a <a class="link" href="regex_token_iterator.html" title="regex_token_iterator"><code class="computeroutput"><span class="identifier">regex_token_iterator</span></code></a> that will enumerate | |
220 | <span class="emphasis"><em>R</em></span> strings for each regular expression match of the expression | |
221 | <span class="emphasis"><em>re</em></span> found within the sequence [a,b), using match flags | |
222 | <span class="emphasis"><em>m</em></span> (see <a class="link" href="match_flag_type.html" title="match_flag_type"><code class="computeroutput"><span class="identifier">match_flag_type</span></code></a>). For each match | |
223 | found one string will be enumerated for each sub-expression index contained | |
224 | within the <span class="emphasis"><em>submatches</em></span> array; if <code class="computeroutput"><span class="identifier">submatches</span><span class="special">[</span><span class="number">0</span><span class="special">]</span></code> | |
225 | is -1, then the first string enumerated for each match will be all of the | |
226 | text from end of the last match to the start of the current match, in addition | |
227 | there will be one extra string enumerated when no more matches can be found: | |
228 | from the end of the last match found, to the end of the underlying sequence. | |
229 | </p> | |
230 | <p> | |
231 | <span class="bold"><strong>Throws</strong></span>: <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">runtime_error</span></code> | |
232 | if the complexity of matching the expression against an N character string | |
233 | begins to exceed O(N<sup>2</sup>), or if the program runs out of stack space while matching | |
234 | the expression (if Boost.Regex is configured in recursive mode), or if the | |
235 | matcher exhausts its permitted memory allocation (if Boost.Regex is configured | |
236 | in non-recursive mode). | |
237 | </p> | |
238 | <a name="boost_regex.regex_token_iterator.construct5"></a><pre class="programlisting"><span class="identifier">regex_token_iterator</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">regex_token_iterator</span><span class="special">&</span> <span class="identifier">that</span><span class="special">);</span> | |
239 | </pre> | |
240 | <p> | |
241 | <span class="bold"><strong>Effects</strong></span>: constructs a copy of <code class="computeroutput"><span class="identifier">that</span></code>. | |
242 | </p> | |
243 | <p> | |
244 | <span class="bold"><strong>Postconditions</strong></span>: <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span> <span class="special">==</span> <span class="identifier">that</span></code>. | |
245 | </p> | |
246 | <a name="boost_regex.regex_token_iterator.assign"></a><pre class="programlisting"><span class="identifier">regex_token_iterator</span><span class="special">&</span> <span class="keyword">operator</span><span class="special">=(</span><span class="keyword">const</span> <span class="identifier">regex_token_iterator</span><span class="special">&</span> <span class="identifier">that</span><span class="special">);</span> | |
247 | </pre> | |
248 | <p> | |
249 | <span class="bold"><strong>Effects</strong></span>: sets <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code> to be equal to <code class="computeroutput"><span class="identifier">that</span></code>. | |
250 | </p> | |
251 | <p> | |
252 | <span class="bold"><strong>Postconditions</strong></span>: <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span> <span class="special">==</span> <span class="identifier">that</span></code>. | |
253 | </p> | |
254 | <a name="boost_regex.regex_token_iterator.op_eq"></a><pre class="programlisting"><span class="keyword">bool</span> <span class="keyword">operator</span><span class="special">==(</span><span class="keyword">const</span> <span class="identifier">regex_token_iterator</span><span class="special">&)</span><span class="keyword">const</span><span class="special">;</span> | |
255 | </pre> | |
256 | <p> | |
257 | <span class="bold"><strong>Effects</strong></span>: returns true if <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code> is the same position as <code class="computeroutput"><span class="identifier">that</span></code>. | |
258 | </p> | |
259 | <a name="boost_regex.regex_token_iterator.op_ne"></a><pre class="programlisting"><span class="keyword">bool</span> <span class="keyword">operator</span><span class="special">!=(</span><span class="keyword">const</span> <span class="identifier">regex_token_iterator</span><span class="special">&)</span><span class="keyword">const</span><span class="special">;</span> | |
260 | </pre> | |
261 | <p> | |
262 | <span class="bold"><strong>Effects</strong></span>: returns <code class="computeroutput"><span class="special">!(*</span><span class="keyword">this</span> <span class="special">==</span> <span class="identifier">that</span><span class="special">)</span></code>. | |
263 | </p> | |
264 | <a name="boost_regex.regex_token_iterator.op_deref"></a><pre class="programlisting"><span class="keyword">const</span> <span class="identifier">value_type</span><span class="special">&</span> <span class="keyword">operator</span><span class="special">*()</span><span class="keyword">const</span><span class="special">;</span> | |
265 | </pre> | |
266 | <p> | |
267 | <span class="bold"><strong>Effects</strong></span>: returns the current character sequence | |
268 | being enumerated. | |
269 | </p> | |
270 | <a name="boost_regex.regex_token_iterator.op_arrow"></a><pre class="programlisting"><span class="keyword">const</span> <span class="identifier">value_type</span><span class="special">*</span> <span class="keyword">operator</span><span class="special">->()</span><span class="keyword">const</span><span class="special">;</span> | |
271 | </pre> | |
272 | <p> | |
273 | <span class="bold"><strong>Effects</strong></span>: returns <code class="computeroutput"><span class="special">&(*</span><span class="keyword">this</span><span class="special">)</span></code>. | |
274 | </p> | |
275 | <a name="boost_regex.regex_token_iterator.op_inc1"></a><pre class="programlisting"><span class="identifier">regex_token_iterator</span><span class="special">&</span> <span class="keyword">operator</span><span class="special">++();</span> | |
276 | </pre> | |
277 | <p> | |
278 | <span class="bold"><strong>Effects</strong></span>: Moves on to the next character | |
279 | sequence to be enumerated. | |
280 | </p> | |
281 | <p> | |
282 | <span class="bold"><strong>Throws</strong></span>: <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">runtime_error</span></code> | |
283 | if the complexity of matching the expression against an N character string | |
284 | begins to exceed O(N<sup>2</sup>), or if the program runs out of stack space while matching | |
285 | the expression (if Boost.Regex is configured in recursive mode), or if the | |
286 | matcher exhausts its permitted memory allocation (if Boost.Regex is configured | |
287 | in non-recursive mode). | |
288 | </p> | |
289 | <p> | |
290 | <span class="bold"><strong>Returns</strong></span>: <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code>. | |
291 | </p> | |
292 | <a name="boost_regex.regex_token_iterator.op_inc2"></a><pre class="programlisting"><span class="identifier">regex_token_iterator</span><span class="special">&</span> <span class="keyword">operator</span><span class="special">++(</span><span class="keyword">int</span><span class="special">);</span> | |
293 | </pre> | |
294 | <p> | |
295 | <span class="bold"><strong>Effects</strong></span>: constructs a copy result of <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code>, then | |
296 | calls <code class="computeroutput"><span class="special">++(*</span><span class="keyword">this</span><span class="special">)</span></code>. | |
297 | </p> | |
298 | <p> | |
299 | <span class="bold"><strong>Returns</strong></span>: result. | |
300 | </p> | |
301 | <a name="boost_regex.regex_token_iterator.make"></a><pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">traits</span><span class="special">></span> | |
302 | <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> | |
303 | <span class="identifier">make_regex_token_iterator</span><span class="special">(</span> | |
304 | <span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*</span> <span class="identifier">p</span><span class="special">,</span> | |
305 | <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> | |
306 | <span class="keyword">int</span> <span class="identifier">submatch</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> | |
307 | <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</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> | |
308 | ||
309 | <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</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">ST</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">SA</span><span class="special">></span> | |
310 | <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>::</span><span class="identifier">const_iterator</span><span class="special">,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> | |
311 | <span class="identifier">make_regex_token_iterator</span><span class="special">(</span> | |
312 | <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">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>&</span> <span class="identifier">p</span><span class="special">,</span> | |
313 | <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> | |
314 | <span class="keyword">int</span> <span class="identifier">submatch</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> | |
315 | <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</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> | |
316 | ||
317 | <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">traits</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">N</span><span class="special">></span> | |
318 | <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> | |
319 | <span class="identifier">make_regex_token_iterator</span><span class="special">(</span> | |
320 | <span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*</span> <span class="identifier">p</span><span class="special">,</span> | |
321 | <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> | |
322 | <span class="keyword">const</span> <span class="keyword">int</span> <span class="special">(&</span><span class="identifier">submatch</span><span class="special">)[</span><span class="identifier">N</span><span class="special">],</span> | |
323 | <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</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> | |
324 | ||
325 | <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</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">ST</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">SA</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">N</span><span class="special">></span> | |
326 | <span class="identifier">regex_token_iterator</span><span class="special"><</span> | |
327 | <span class="keyword">typename</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>::</span><span class="identifier">const_iterator</span><span class="special">,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> | |
328 | <span class="identifier">make_regex_token_iterator</span><span class="special">(</span> | |
329 | <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">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>&</span> <span class="identifier">p</span><span class="special">,</span> | |
330 | <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> | |
331 | <span class="keyword">const</span> <span class="keyword">int</span> <span class="special">(&</span><span class="identifier">submatch</span><span class="special">)[</span><span class="identifier">N</span><span class="special">],</span> | |
332 | <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</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> | |
333 | ||
334 | <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">traits</span><span class="special">></span> | |
335 | <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> | |
336 | <span class="identifier">make_regex_token_iterator</span><span class="special">(</span> | |
337 | <span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*</span> <span class="identifier">p</span><span class="special">,</span> | |
338 | <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> | |
339 | <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="keyword">int</span><span class="special">>&</span> <span class="identifier">submatch</span><span class="special">,</span> | |
340 | <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</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> | |
341 | ||
342 | <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</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">ST</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">SA</span><span class="special">></span> | |
343 | <span class="identifier">regex_token_iterator</span><span class="special"><</span> | |
344 | <span class="keyword">typename</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>::</span><span class="identifier">const_iterator</span><span class="special">,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> | |
345 | <span class="identifier">make_regex_token_iterator</span><span class="special">(</span> | |
346 | <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">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>&</span> <span class="identifier">p</span><span class="special">,</span> | |
347 | <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> | |
348 | <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="keyword">int</span><span class="special">>&</span> <span class="identifier">submatch</span><span class="special">,</span> | |
349 | <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</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> | |
350 | </pre> | |
351 | <p> | |
352 | <span class="bold"><strong>Effects</strong></span>: returns a <a class="link" href="regex_token_iterator.html" title="regex_token_iterator"><code class="computeroutput"><span class="identifier">regex_token_iterator</span></code></a> that enumerates | |
353 | one <a class="link" href="sub_match.html" title="sub_match"><code class="computeroutput"><span class="identifier">sub_match</span></code></a> | |
354 | for each value in <span class="emphasis"><em>submatch</em></span> for each occurrence of regular | |
355 | expression <span class="emphasis"><em>e</em></span> in string <span class="emphasis"><em>p</em></span>, matched | |
356 | using <a class="link" href="match_flag_type.html" title="match_flag_type"><code class="computeroutput"><span class="identifier">match_flag_type</span></code></a> | |
357 | <span class="emphasis"><em>m</em></span>. | |
358 | </p> | |
359 | <h5> | |
360 | <a name="boost_regex.ref.regex_token_iterator.h1"></a> | |
361 | <span class="phrase"><a name="boost_regex.ref.regex_token_iterator.examples"></a></span><a class="link" href="regex_token_iterator.html#boost_regex.ref.regex_token_iterator.examples">Examples</a> | |
362 | </h5> | |
363 | <p> | |
364 | The following example takes a string and splits it into a series of tokens: | |
365 | </p> | |
366 | <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span> | |
367 | <span class="preprocessor">#include</span> <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">hpp</span><span class="special">></span> | |
368 | ||
369 | <span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">std</span><span class="special">;</span> | |
370 | ||
371 | <span class="keyword">int</span> <span class="identifier">main</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">argc</span><span class="special">)</span> | |
372 | <span class="special">{</span> | |
373 | <span class="identifier">string</span> <span class="identifier">s</span><span class="special">;</span> | |
374 | <span class="keyword">do</span><span class="special">{</span> | |
375 | <span class="keyword">if</span><span class="special">(</span><span class="identifier">argc</span> <span class="special">==</span> <span class="number">1</span><span class="special">)</span> | |
376 | <span class="special">{</span> | |
377 | <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"Enter text to split (or \"quit\" to exit): "</span><span class="special">;</span> | |
378 | <span class="identifier">getline</span><span class="special">(</span><span class="identifier">cin</span><span class="special">,</span> <span class="identifier">s</span><span class="special">);</span> | |
379 | <span class="keyword">if</span><span class="special">(</span><span class="identifier">s</span> <span class="special">==</span> <span class="string">"quit"</span><span class="special">)</span> <span class="keyword">break</span><span class="special">;</span> | |
380 | <span class="special">}</span> | |
381 | <span class="keyword">else</span> | |
382 | <span class="identifier">s</span> <span class="special">=</span> <span class="string">"This is a string of tokens"</span><span class="special">;</span> | |
383 | ||
384 | <span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex</span> <span class="identifier">re</span><span class="special">(</span><span class="string">"\\s+"</span><span class="special">);</span> | |
385 | <span class="identifier">boost</span><span class="special">::</span><span class="identifier">sregex_token_iterator</span> <span class="identifier">i</span><span class="special">(</span><span class="identifier">s</span><span class="special">.</span><span class="identifier">begin</span><span class="special">(),</span> <span class="identifier">s</span><span class="special">.</span><span class="identifier">end</span><span class="special">(),</span> <span class="identifier">re</span><span class="special">,</span> <span class="special">-</span><span class="number">1</span><span class="special">);</span> | |
386 | <span class="identifier">boost</span><span class="special">::</span><span class="identifier">sregex_token_iterator</span> <span class="identifier">j</span><span class="special">;</span> | |
387 | ||
388 | <span class="keyword">unsigned</span> <span class="identifier">count</span> <span class="special">=</span> <span class="number">0</span><span class="special">;</span> | |
389 | <span class="keyword">while</span><span class="special">(</span><span class="identifier">i</span> <span class="special">!=</span> <span class="identifier">j</span><span class="special">)</span> | |
390 | <span class="special">{</span> | |
391 | <span class="identifier">cout</span> <span class="special"><<</span> <span class="special">*</span><span class="identifier">i</span><span class="special">++</span> <span class="special"><<</span> <span class="identifier">endl</span><span class="special">;</span> | |
392 | <span class="identifier">count</span><span class="special">++;</span> | |
393 | <span class="special">}</span> | |
394 | <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"There were "</span> <span class="special"><<</span> <span class="identifier">count</span> <span class="special"><<</span> <span class="string">" tokens found."</span> <span class="special"><<</span> <span class="identifier">endl</span><span class="special">;</span> | |
395 | ||
396 | <span class="special">}</span><span class="keyword">while</span><span class="special">(</span><span class="identifier">argc</span> <span class="special">==</span> <span class="number">1</span><span class="special">);</span> | |
397 | <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span> | |
398 | <span class="special">}</span> | |
399 | </pre> | |
400 | <p> | |
401 | The following example takes a html file and outputs a list of all the linked | |
402 | files: | |
403 | </p> | |
404 | <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">fstream</span><span class="special">></span> | |
405 | <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span> | |
406 | <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iterator</span><span class="special">></span> | |
407 | <span class="preprocessor">#include</span> <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">hpp</span><span class="special">></span> | |
408 | ||
409 | <span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex</span> <span class="identifier">e</span><span class="special">(</span><span class="string">"<\\s*A\\s+[^>]*href\\s*=\\s*\"([^\"]*)\""</span><span class="special">,</span> | |
410 | <span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex</span><span class="special">::</span><span class="identifier">normal</span> <span class="special">|</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">regbase</span><span class="special">::</span><span class="identifier">icase</span><span class="special">);</span> | |
411 | ||
412 | <span class="keyword">void</span> <span class="identifier">load_file</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&</span> <span class="identifier">s</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">istream</span><span class="special">&</span> <span class="identifier">is</span><span class="special">)</span> | |
413 | <span class="special">{</span> | |
414 | <span class="identifier">s</span><span class="special">.</span><span class="identifier">erase</span><span class="special">();</span> | |
415 | <span class="comment">//</span> | |
416 | <span class="comment">// attempt to grow string buffer to match file size,</span> | |
417 | <span class="comment">// this doesn't always work...</span> | |
418 | <span class="identifier">s</span><span class="special">.</span><span class="identifier">reserve</span><span class="special">(</span><span class="identifier">is</span><span class="special">.</span><span class="identifier">rdbuf</span><span class="special">()-></span><span class="identifier">in_avail</span><span class="special">());</span> | |
419 | <span class="keyword">char</span> <span class="identifier">c</span><span class="special">;</span> | |
420 | <span class="keyword">while</span><span class="special">(</span><span class="identifier">is</span><span class="special">.</span><span class="identifier">get</span><span class="special">(</span><span class="identifier">c</span><span class="special">))</span> | |
421 | <span class="special">{</span> | |
422 | <span class="comment">// use logarithmic growth strategy, in case</span> | |
423 | <span class="comment">// in_avail (above) returned zero:</span> | |
424 | <span class="keyword">if</span><span class="special">(</span><span class="identifier">s</span><span class="special">.</span><span class="identifier">capacity</span><span class="special">()</span> <span class="special">==</span> <span class="identifier">s</span><span class="special">.</span><span class="identifier">size</span><span class="special">())</span> | |
425 | <span class="identifier">s</span><span class="special">.</span><span class="identifier">reserve</span><span class="special">(</span><span class="identifier">s</span><span class="special">.</span><span class="identifier">capacity</span><span class="special">()</span> <span class="special">*</span> <span class="number">3</span><span class="special">);</span> | |
426 | <span class="identifier">s</span><span class="special">.</span><span class="identifier">append</span><span class="special">(</span><span class="number">1</span><span class="special">,</span> <span class="identifier">c</span><span class="special">);</span> | |
427 | <span class="special">}</span> | |
428 | <span class="special">}</span> | |
429 | ||
430 | <span class="keyword">int</span> <span class="identifier">main</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">argc</span><span class="special">,</span> <span class="keyword">char</span><span class="special">**</span> <span class="identifier">argv</span><span class="special">)</span> | |
431 | <span class="special">{</span> | |
432 | <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">s</span><span class="special">;</span> | |
433 | <span class="keyword">int</span> <span class="identifier">i</span><span class="special">;</span> | |
434 | <span class="keyword">for</span><span class="special">(</span><span class="identifier">i</span> <span class="special">=</span> <span class="number">1</span><span class="special">;</span> <span class="identifier">i</span> <span class="special"><</span> <span class="identifier">argc</span><span class="special">;</span> <span class="special">++</span><span class="identifier">i</span><span class="special">)</span> | |
435 | <span class="special">{</span> | |
436 | <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"Findings URL's in "</span> <span class="special"><<</span> <span class="identifier">argv</span><span class="special">[</span><span class="identifier">i</span><span class="special">]</span> <span class="special"><<</span> <span class="string">":"</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> | |
437 | <span class="identifier">s</span><span class="special">.</span><span class="identifier">erase</span><span class="special">();</span> | |
438 | <span class="identifier">std</span><span class="special">::</span><span class="identifier">ifstream</span> <span class="identifier">is</span><span class="special">(</span><span class="identifier">argv</span><span class="special">[</span><span class="identifier">i</span><span class="special">]);</span> | |
439 | <span class="identifier">load_file</span><span class="special">(</span><span class="identifier">s</span><span class="special">,</span> <span class="identifier">is</span><span class="special">);</span> | |
440 | <span class="identifier">boost</span><span class="special">::</span><span class="identifier">sregex_token_iterator</span> <span class="identifier">i</span><span class="special">(</span><span class="identifier">s</span><span class="special">.</span><span class="identifier">begin</span><span class="special">(),</span> <span class="identifier">s</span><span class="special">.</span><span class="identifier">end</span><span class="special">(),</span> <span class="identifier">e</span><span class="special">,</span> <span class="number">1</span><span class="special">);</span> | |
441 | <span class="identifier">boost</span><span class="special">::</span><span class="identifier">sregex_token_iterator</span> <span class="identifier">j</span><span class="special">;</span> | |
442 | <span class="keyword">while</span><span class="special">(</span><span class="identifier">i</span> <span class="special">!=</span> <span class="identifier">j</span><span class="special">)</span> | |
443 | <span class="special">{</span> | |
444 | <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="special">*</span><span class="identifier">i</span><span class="special">++</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> | |
445 | <span class="special">}</span> | |
446 | <span class="special">}</span> | |
447 | <span class="comment">//</span> | |
448 | <span class="comment">// alternative method:</span> | |
449 | <span class="comment">// test the array-literal constructor, and split out the whole</span> | |
450 | <span class="comment">// match as well as $1....</span> | |
451 | <span class="comment">//</span> | |
452 | <span class="keyword">for</span><span class="special">(</span><span class="identifier">i</span> <span class="special">=</span> <span class="number">1</span><span class="special">;</span> <span class="identifier">i</span> <span class="special"><</span> <span class="identifier">argc</span><span class="special">;</span> <span class="special">++</span><span class="identifier">i</span><span class="special">)</span> | |
453 | <span class="special">{</span> | |
454 | <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"Findings URL's in "</span> <span class="special"><<</span> <span class="identifier">argv</span><span class="special">[</span><span class="identifier">i</span><span class="special">]</span> <span class="special"><<</span> <span class="string">":"</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> | |
455 | <span class="identifier">s</span><span class="special">.</span><span class="identifier">erase</span><span class="special">();</span> | |
456 | <span class="identifier">std</span><span class="special">::</span><span class="identifier">ifstream</span> <span class="identifier">is</span><span class="special">(</span><span class="identifier">argv</span><span class="special">[</span><span class="identifier">i</span><span class="special">]);</span> | |
457 | <span class="identifier">load_file</span><span class="special">(</span><span class="identifier">s</span><span class="special">,</span> <span class="identifier">is</span><span class="special">);</span> | |
458 | <span class="keyword">const</span> <span class="keyword">int</span> <span class="identifier">subs</span><span class="special">[]</span> <span class="special">=</span> <span class="special">{</span><span class="number">1</span><span class="special">,</span> <span class="number">0</span><span class="special">,};</span> | |
459 | <span class="identifier">boost</span><span class="special">::</span><span class="identifier">sregex_token_iterator</span> <span class="identifier">i</span><span class="special">(</span><span class="identifier">s</span><span class="special">.</span><span class="identifier">begin</span><span class="special">(),</span> <span class="identifier">s</span><span class="special">.</span><span class="identifier">end</span><span class="special">(),</span> <span class="identifier">e</span><span class="special">,</span> <span class="identifier">subs</span><span class="special">);</span> | |
460 | <span class="identifier">boost</span><span class="special">::</span><span class="identifier">sregex_token_iterator</span> <span class="identifier">j</span><span class="special">;</span> | |
461 | <span class="keyword">while</span><span class="special">(</span><span class="identifier">i</span> <span class="special">!=</span> <span class="identifier">j</span><span class="special">)</span> | |
462 | <span class="special">{</span> | |
463 | <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="special">*</span><span class="identifier">i</span><span class="special">++</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> | |
464 | <span class="special">}</span> | |
465 | <span class="special">}</span> | |
466 | ||
467 | <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span> | |
468 | <span class="special">}</span> | |
469 | </pre> | |
470 | </div> | |
471 | <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> | |
472 | <td align="left"></td> | |
473 | <td align="right"><div class="copyright-footer">Copyright © 1998-2013 John Maddock<p> | |
474 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
475 | 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>) | |
476 | </p> | |
477 | </div></td> | |
478 | </tr></table> | |
479 | <hr> | |
480 | <div class="spirit-nav"> | |
481 | <a accesskey="p" href="regex_iterator.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../ref.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="bad_expression.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> | |
482 | </div> | |
483 | </body> | |
484 | </html> |