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10  <title>Boost Tokenizer Class</title>
11</head>
12
13<body bgcolor="#FFFFFF" text="#000000" link="#0000EE" vlink="#551A8B" alink=
14"#FF0000">
15  <p><img src="../../boost.png" alt="C++ Boost" width="277" height=
16  "86"><br></p>
17
18  <h1 align="center">Tokenizer Class</h1>
19  <pre>
20  template &lt;
21        class TokenizerFunc = char_delimiters_separator&lt;char&gt;,
22        class Iterator = std::string::const_iterator,
23        class Type = std::string
24  &gt;
25  class tokenizer
26</pre>
27
28  <p>The tokenizer class provides a container view of a series of tokens
29  contained in a sequence. You set the sequence to parse and the
30  TokenizerFunction to use to parse the sequence either upon construction or
31  using the assign member function. Note: No parsing is actually done upon
32  construction. Parsing is done on demand as the tokens are accessed via the
33  iterator provided by begin.</p>
34
35  <h2>Example</h2>
36  <pre>
37// simple_example_1.cpp
38#include&lt;iostream&gt;
39#include&lt;boost/tokenizer.hpp&gt;
40#include&lt;string&gt;
41
42int main(){
43   using namespace std;
44   using namespace boost;
45   string s = "This is,  a test";
46   tokenizer&lt;&gt; tok(s);
47   for(tokenizer&lt;&gt;::iterator beg=tok.begin(); beg!=tok.end();++beg){
48       cout &lt;&lt; *beg &lt;&lt; "\n";
49   }
50}
51</pre>
52
53  <p>&nbsp;</p>
54
55  <h3>Template Parameters</h3>
56
57  <table border="1" summary="">
58    <tr>
59      <th>Parameter</th>
60
61      <th>Description</th>
62    </tr>
63
64    <tr>
65      <td><tt>TokenizerFunc</tt></td>
66
67      <td>The TokenizerFunction used to parse the sequence.</td>
68    </tr>
69
70    <tr>
71      <td><tt>Iterator</tt></td>
72
73      <td>The type of the iterator the specifies the sequence.</td>
74    </tr>
75
76    <tr>
77      <td><tt>Type</tt></td>
78
79      <td>The type of the token, typically string.</td>
80    </tr>
81  </table>
82
83  <p>&nbsp;</p>
84
85  <h2>Related Types</h2>
86
87  <table border="1" summary="">
88    <tr>
89      <td>
90        <p align="center"><strong>Type</strong></p>
91      </td>
92
93      <td>
94        <p align="center"><strong>Remarks</strong></p>
95      </td>
96    </tr>
97
98    <tr>
99      <td>iterator</td>
100
101      <td>The type returned by begin and end. Note: the category of iterator
102      will be at most ForwardIterator. It will be InputIterator if the
103      Iterator template parameter is an InputIterator. For any other
104      category, it will be ForwardIterator.</td>
105    </tr>
106
107    <tr>
108      <td>const_iterator</td>
109
110      <td>Same type as iterator.</td>
111    </tr>
112
113    <tr>
114      <td>value_type</td>
115
116      <td>Same type as the template parameter Type</td>
117    </tr>
118
119    <tr>
120      <td>reference</td>
121
122      <td>Same type as value_type&amp;</td>
123    </tr>
124
125    <tr>
126      <td>const_reference</td>
127
128      <td>Same type as const reference</td>
129    </tr>
130
131    <tr>
132      <td>pointer</td>
133
134      <td>Same type as value_type*</td>
135    </tr>
136
137    <tr>
138      <td>const_pointer</td>
139
140      <td>Same type as const pointer</td>
141    </tr>
142
143    <tr>
144      <td>size_type</td>
145
146      <td>void</td>
147    </tr>
148
149    <tr>
150      <td>difference_type</td>
151
152      <td>void</td>
153    </tr>
154  </table>
155
156  <p>&nbsp;</p>
157
158  <h2>Construction and Member Functions</h2>
159  <pre>
160tokenizer(Iterator first, Iterator last,const TokenizerFunc&amp; f = TokenizerFunc())
161
162template&lt;class Container&gt;
163tokenizer(const Container&amp; c,const TokenizerFunc&amp; f = TokenizerFunc())
164
165void assign(Iterator first, Iterator last)
166
167void assign(Iterator first, Iterator last, const TokenizerFunc&amp; f)
168
169template&lt;class Container&gt;
170void assign(const Container&amp; c)
171
172template&lt;class Container&gt;
173void assign(const Container&amp; c, const TokenizerFunc&amp; f)
174
175iterator begin() const
176
177iterator end() const
178</pre>
179
180  <table border="1" summary="">
181    <tr>
182      <td>
183        <p align="center"><strong>Parameter</strong></p>
184      </td>
185
186      <td>
187        <p align="center"><strong>Description</strong></p>
188      </td>
189    </tr>
190
191    <tr>
192      <td>c</td>
193
194      <td>A container that contains the sequence to parse. Note: c.begin()
195      and c.end() must be convertible to the template parameter
196      Iterator.</td>
197    </tr>
198
199    <tr>
200      <td>f</td>
201
202      <td>A functor that is a model of TokenizerFunction that will be used to
203      parse the sequence.</td>
204    </tr>
205
206    <tr>
207      <td>first</td>
208
209      <td>The iterator that represents the beginning position in the sequence
210      to be parsed.</td>
211    </tr>
212
213    <tr>
214      <td>last</td>
215
216      <td>The iterator that represents the past the end position in the
217      sequence to be parsed.</td>
218    </tr>
219  </table>
220
221  <p>&nbsp;</p>
222  <hr>
223
224  <p><a href="http://validator.w3.org/check?uri=referer"><img border="0" src=
225  "http://www.w3.org/Icons/valid-html401" alt="Valid HTML 4.01 Transitional"
226  height="31" width="88"></a></p>
227
228  <p>Revised
229  <!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %B, %Y" startspan -->25 December, 2006<!--webbot bot="Timestamp" endspan i-checksum="38518" --></p>
230
231  <p><i>Copyright &copy; 2001 John R. Bandela</i></p>
232
233  <p><i>Distributed under the Boost Software License, Version 1.0. (See
234  accompanying file <a href="../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or
235  copy at <a href=
236  "http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</a>)</i></p>
237</body>
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