boost_mirror/utility
1
0
Fork 0
mirror of https://github.com/boostorg/utility.git synced 2025-05-09 15:04:00 +00:00
Code Issues Packages Projects Releases Wiki Activity

various edits

Browse Source 
[SVN r9108]
This commit is contained in:
Jeremy Siek 2001-02-11 04:34:32 +00:00
parent eeeb7ef5b9
commit 5c6dd2f172
1 changed files with 22 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
filter_iterator.htm
View File

@ -46,12 +46,12 @@ namespace boost {
Generator</a></h2> Generator</a></h2>
The class <tt>filter_iterator_generator</tt> is a helper class who's The class <tt>filter_iterator_generator</tt> is a helper class who's
purpose is to construct a filter iterator adaptor type. The template purpose is to construct a filter iterator type. The template
parameters for this class are the <tt>Predicate</tt> function object parameters for this class are the <tt>Predicate</tt> function object
type and the <tt>BaseIterator</tt> type that is being wrapped. In most type and the <tt>BaseIterator</tt> type that is being wrapped. In
cases the associated types for the wrapped iterator can be deduced most cases the associated types for the wrapped iterator can be
from <tt>std::iterator_traits</tt>, but in some situations the user deduced from <tt>std::iterator_traits</tt>, but in some situations the
may want to override these types, so there are also template user may want to override these types, so there are also template
parameters for each of the iterator's associated types. parameters for each of the iterator's associated types.
<pre> <pre>
@ -60,11 +60,12 @@ template &lt;class Predicate, class BaseIterator,
class filter_iterator_generator class filter_iterator_generator
{ {
public: public:
typedef ... type; // the resulting filter <a href="./iterator_adaptor.htm"><tt>iterator_adaptor</tt></a> type typedef ... type; // the resulting filter iterator type which is <a href="./iterator_adaptor.htm"><tt>iterator_adaptor</tt></a>
typedef ... policies_type; // the policies type for the iterator adaptor typedef ... policies_type; // the policies type for the iterator adaptor
} }
</pre> </pre>
<h3>Example</h3> <h3>Example</h3>
The following example uses filter iterator to print out all the The following example uses filter iterator to print out all the
@ -172,8 +173,22 @@ href="www.sgi.com/tech/stl/InputIterator.html">InputIterator</a> or <a
href="www.sgi.com/tech/stl/ForwardIterator.html">ForwardIterator</a> href="www.sgi.com/tech/stl/ForwardIterator.html">ForwardIterator</a>
depending on the adapted iterator type. depending on the adapted iterator type.
<p>
<h3>Members</h3>
The filter iterator type implements all of the member functions and
operators required of the <a
href="http://www.sgi.com/tech/stl/ForwardIterator.html">ForwardIterator</a>
concept. In addition it has the following constructor:
<pre>filter_iterator_generator::type(const BaseIterator& it, const Policies& p = Policies())</pre>
<p>
The policies type has only one public function, which is its constructor:
<pre>filter_iterator_generator::policies_type(const Predicate& p, const BaseIterator& end)</pre>
<p>
<hr> <hr>
<p> <p>