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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>Boost Token Iterator</title>
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<body bgcolor="#FFFFFF" text="#000000" link="#0000EE" vlink="#551A8B" alink=
"#FF0000">
<p><img src="../../boost.png" alt="C++ Boost" width="277" height=
"86"><br></p>
<h1 align="center">Token Iterator</h1>
<pre>
template <
class TokenizerFunc = char_delimiters_separator<char>,
class Iterator = std::string::const_iterator,
class Type = std::string
>
class token_iterator_generator
</pre>
<pre>
template<class Type, class Iterator, class TokenizerFunc>
typename token_iterator_generator<TokenizerFunc,Iterator,Type>::type
make_token_iterator(Iterator begin, Iterator end,const TokenizerFunc& fun)
</pre>
<p>The token iterator serves to provide an iterator view of the tokens in a
parsed sequence.</p>
<h2>Example</h2>
<pre>
/// simple_example_5.cpp
#include<iostream>
#include<boost/token_iterator.hpp>
#include<string>
int main(){
using namespace std;
using namespace boost;
string s = "12252001";
int offsets[] = {2,2,4};
offset_separator f(offsets, offsets+3);
typedef token_iterator_generator<offset_separator>::type Iter;
Iter beg = make_token_iterator<string>(s.begin(),s.end(),f);
Iter end = make_token_iterator<string>(s.end(),s.end(),f);
// The above statement could also have been what is below
// Iter end;
for(;beg!=end;++beg){
cout << *beg << "\n";
}
}
</pre>
<p> </p>
<h3>Template Parameters</h3>
<table border="1" summary="">
<tr>
<th>Parameter</th>
<th>Description</th>
</tr>
<tr>
<td><tt>TokenizerFunc</tt></td>
<td>The TokenizerFunction used to parse the sequence.</td>
</tr>
<tr>
<td><tt>Iterator</tt></td>
<td>The type of the iterator the specifies the sequence.</td>
</tr>
<tr>
<td><tt>Type</tt></td>
<td>The type of the token, typically string.</td>
</tr>
</table>
<h2>Model of</h2>
<p>The category of Iterator, up to and including Forward Iterator. Anything
higher will get scaled down to Forward Iterator.</p>
<h2>Related Types</h2>
<table border="1" summary="">
<tr>
<td>
<p align="center"><strong>Type</strong></p>
</td>
<td>
<p align="center"><strong>Remarks</strong></p>
</td>
</tr>
<tr>
<td>token_iterator_generator::type</td>
<td>The type of the token iterator.</td>
</tr>
</table>
<h2>Creation</h2>
<pre>
template<class Type, class Iterator, class TokenizerFunc>
typename token_iterator_generator<TokenizerFunc,Iterator,Type>::type
make_token_iterator(Iterator begin, Iterator end,const TokenizerFunc& fun)
</pre>
<table border="1" summary="">
<tr>
<td>
<p align="center"><strong>Parameter</strong></p>
</td>
<td>
<p align="center"><strong>Description</strong></p>
</td>
</tr>
<tr>
<td>begin</td>
<td>The beginning of the sequence to be parsed.</td>
</tr>
<tr>
<td>end</td>
<td>Past the end of the sequence to be parsed.</td>
</tr>
<tr>
<td>fun</td>
<td>A functor that is a model of TokenizerFunction</td>
</tr>
</table>
<p> </p>
<hr>
<p><a href="http://validator.w3.org/check?uri=referer"><img border="0" src=
"../../doc/images/valid-html401.png" alt="Valid HTML 4.01 Transitional"
height="31" width="88"></a></p>
<p>Revised
<!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %B, %Y" startspan -->25
December, 2006<!--webbot bot="Timestamp" endspan i-checksum="38518" --></p>
<p><i>Copyright © 2001 John R. Bandela</i></p>
<p><i>Distributed under the Boost Software License, Version 1.0. (See
accompanying file <a href="../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or
copy at <a href=
"http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</a>)</i></p>
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