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24 Commits

Author SHA1 Message Date
da8909457d Branch for working on the documentation tools documentation.
[SVN r68640]
2011-02-04 21:18:24 +00:00
caa0e5035a Added Michel's patches for #1427
[SVN r68205]
2011-01-17 14:52:49 +00:00
14b1075d6b Apply patch for #3645; will merge to release after tests cycle
[SVN r67738]
2011-01-06 23:42:00 +00:00
752fc7c185 Removed <boost/pending/integer_range.hpp> and a few more uses of it; fixes #4642
[SVN r67035]
2010-12-05 20:38:44 +00:00
15f3bf9352 Update various libraries' documentation build.
Mostly to use the images and css files under doc/src instead of
doc/html, usually be deleting the settings in order to use the defaults.
Also add 'boost.root' to some builds in order to fix links which rely on
it.

[SVN r63146]
2010-06-20 18:00:48 +00:00
d469568de7 function_input_iterator fixes from Dean Michael Berris
[SVN r62710]
2010-06-10 05:59:46 +00:00
251b9f8057 Fixed #3434
[SVN r62626]
2010-06-09 01:13:28 +00:00
2786268510 Applied patches from #1427; fixes #1427
[SVN r62625]
2010-06-09 01:08:45 +00:00
6bb82230b9 Added function_input_iterator from Dean Michael Berris; fixes #2893
[SVN r62615]
2010-06-09 00:09:56 +00:00
c07f55ff65 Removed unneeded #include; fixes #1533
[SVN r62593]
2010-06-08 19:10:16 +00:00
ac522bc9e1 category of each component iterator is reduced to a known category before we try to find a minimum.
Closes #1517


[SVN r58012]
2009-11-28 18:53:43 +00:00
4c60e26bf8 Made sure that iterator_facade's nested `::pointer` type is always
the same as what's returned from operator->.  For input iterators,
that wasn't always the case (see operator_arrow_proxy).

Fixes #1019.


[SVN r57989]
2009-11-28 05:12:29 +00:00
d11c7a3ec4 rm cmake from trunk. I'm not entirely sure this is necessary to satisfy the inspect script, but I'm not taking any chances, and it is easy to put back
[SVN r56942]
2009-10-17 02:07:38 +00:00
76fd8e27fb Copyrights on CMakeLists.txt to keep them from clogging up the inspect
reports.  This is essentially the same commit as r55095 on the release
branch.



[SVN r55159]
2009-07-26 00:49:56 +00:00
f2433c63d5 Add PDF generation options to fix external links to point to the web site.
Added a few more Boostbook based libs that were missed first time around.
Fixed PDF naming issues.

[SVN r51284]
2009-02-17 10:05:58 +00:00
55c08b706c Updating dependency information for modularized libraries.
[SVN r49628]
2008-11-07 17:05:27 +00:00
835498603d Updating CMake files to latest trunk. Added dependency information for regression tests and a few new macros for internal use.
[SVN r49627]
2008-11-07 17:02:56 +00:00
b0ec5a759b Continuing merge of CMake build system files into trunk with the encouragement of Doug Gregor
[SVN r49510]
2008-11-01 13:15:41 +00:00
e06c4b3279 Applied patch from ticket #2344
[SVN r49227]
2008-10-09 21:49:48 +00:00
bf7d904bf8 Point links to the pages that used to be in 'more' to the site.
[SVN r43210]
2008-02-10 15:02:17 +00:00
efecbd0d27 don't use identifires R1 and R2: some HP-UX headers define them as macros
[SVN r42064]
2007-12-15 03:42:49 +00:00
65e229fb0d SunPro 5.9 can't detect lvalue returns
[SVN r41956]
2007-12-10 15:19:21 +00:00
bd5731efa9 // Add or correct comment identifying Boost library this header is associated with.
[SVN r41173]
2007-11-17 20:13:16 +00:00
a2d9e63f94 Get rid of .cvsignore files
[SVN r41107]
2007-11-15 15:20:27 +00:00
98 changed files with 640 additions and 145 deletions

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:
iterator
:
<xsl:param>boost.root=../../../..
<xsl:param>toc.max.depth=3
<xsl:param>toc.section.depth=3
<xsl:param>chunk.section.depth=4
<format>pdf:<xsl:param>boost.url.prefix=http://www.boost.org/doc/libs/release/libs/iterator/doc
;

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@ -0,0 +1,142 @@
<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="generator" content="Docutils 0.6: http://docutils.sourceforge.net/" />
<title></title>
<meta name="author" content="Dean Michael Berris" />
<link rel="stylesheet" href="../../../rst.css" type="text/css" />
</head>
<body>
<div class="document">
<table class="docinfo" frame="void" rules="none">
<col class="docinfo-name" />
<col class="docinfo-content" />
<tbody valign="top">
<tr><th class="docinfo-name">Author:</th>
<td><a class="first reference external" href="mailto:mikhailberis&#64;gmail.com">Dean Michael Berris</a></td></tr>
<tr class="field"><th class="docinfo-name">License:</th><td class="field-body">Distributed under the Boost Software License, Version 1.0
(See accompanying file LICENSE_1_0.txt or copy at <a class="reference external" href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</a>)</td>
</tr>
</tbody>
</table>
<div class="section" id="function-input-iterator">
<h1>Function Input Iterator</h1>
<p>The Function Input Iterator allows for creating iterators that encapsulate
a nullary function object and a state object which tracks the number of times
the iterator has been incremented. A Function Input Iterator models the
<a class="reference external" href="http://www.sgi.com/tech/stl/InputIterator.html">InputIterator</a> concept and is useful for creating bounded input iterators.</p>
<p>Like the Generator Iterator, the Function Input Iterator takes a function
that models the <a class="reference external" href="http://www.sgi.com/tech/stl/Generator.html">Generator</a> concept (which is basically a nullary or 0-arity
function object). Each increment of the function Function Input Iterator
invokes the generator function and stores the value in the iterator. When
the iterator is dereferenced the stored value is returned.</p>
<p>The Function Input Iterator encapsulates a state object which models the
<a class="reference internal" href="#incrementable-concept">Incrementable Concept</a> and the <a class="reference external" href="http://www.sgi.com/tech/stl/EqualityComparable.html">EqualityComparable</a> Concept. These concepts are
described below as:</p>
<div class="section" id="incrementable-concept">
<h2>Incrementable Concept</h2>
<p>A type models the Incrementable Concept when it supports the pre- and post-
increment operators. For a given object <tt class="docutils literal"><span class="pre">i</span></tt> with type <tt class="docutils literal"><span class="pre">I</span></tt>, the following
constructs should be valid:</p>
<table border="1" class="docutils">
<colgroup>
<col width="24%" />
<col width="46%" />
<col width="30%" />
</colgroup>
<tbody valign="top">
<tr><td colspan="3">Construct Description Return Type</td>
</tr>
<tr><td>i++</td>
<td>Post-increment i.</td>
<td>I</td>
</tr>
<tr><td>++i</td>
<td>Pre-increment i.</td>
<td>I&amp;</td>
</tr>
</tbody>
</table>
<p>NOTE: An Incrementable type should also be <a class="reference external" href="http://www.sgi.com/tech/stl/DefaultConstructible.html">DefaultConstructible</a>.</p>
</div>
<div class="section" id="synopsis">
<h2>Synopsis</h2>
<pre class="literal-block">
namespace {
template &lt;class Function, class State&gt;
class function_input_iterator;
template &lt;class Function, class State&gt;
typename function_input_iterator&lt;Function, State&gt;
make_function_input_iterator(Function &amp; f);
struct infinite;
}
</pre>
</div>
<div class="section" id="function-input-iterator-class">
<h2>Function Input Iterator Class</h2>
<p>The class Function Input Iterator class takes two template parameters
<tt class="docutils literal"><span class="pre">Function</span></tt> and <tt class="docutils literal"><span class="pre">State</span></tt>. These two template parameters tell the
Function Input Iterator the type of the function to encapsulate and
the type of the internal state value to hold.</p>
<p>The <tt class="docutils literal"><span class="pre">State</span></tt> parameter is important in cases where you want to
control the type of the counter which determines whether two iterators
are at the same state. This allows for creating a pair of iterators which
bound the range of the invocations of the encapsulated functions.</p>
</div>
<div class="section" id="examples">
<h2>Examples</h2>
<p>The following example shows how we use the function input iterator class
in cases where we want to create bounded (lazy) generated ranges.</p>
<pre class="literal-block">
struct generator {
typedef int result_type;
generator() { srand(time(0)); }
result_type operator() () const {
return rand();
}
};
int main(int argc, char * argv[]) {
generator f;
copy(
make_function_input_iterator(f, 0),
make_function_input_iterator(f, 10),
ostream_iterator&lt;int&gt;(cout, &quot; &quot;)
);
return 0;
}
</pre>
<p>Here we can see that we've bounded the number of invocations using an <tt class="docutils literal"><span class="pre">int</span></tt>
that counts from <tt class="docutils literal"><span class="pre">0</span></tt> to <tt class="docutils literal"><span class="pre">10</span></tt>. Say we want to create an endless stream
of random numbers and encapsulate that in a pair of integers, we can do
it with the <tt class="docutils literal"><span class="pre">boost::infinite</span></tt> helper class.</p>
<pre class="literal-block">
copy(
make_function_input_iterator(f,infinite()),
make_function_input_iterator(f,infinite()),
ostream_iterator&lt;int&gt;(count, &quot; &quot;)
);
</pre>
<p>Above, instead of creating a huge vector we rely on the STL copy algorithm
to traverse the function input iterator and call the function object f
as it increments the iterator. The special property of <tt class="docutils literal"><span class="pre">boost::infinite</span></tt>
is that equating two instances always yield false -- and that incrementing
an instance of <tt class="docutils literal"><span class="pre">boost::infinite</span></tt> doesn't do anything. This is an efficient
way of stating that the iterator range provided by two iterators with an
encapsulated infinite state will definitely be infinite.</p>
</div>
</div>
</div>
<div class="footer">
<hr class="footer" />
<a class="reference external" href="function_input_iterator.rst">View document source</a>.
Generated by <a class="reference external" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference external" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
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@ -0,0 +1,126 @@
:Author:
`Dean Michael Berris <mailto:mikhailberis@gmail.com>`_
:License:
Distributed under the Boost Software License, Version 1.0
(See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Function Input Iterator
=======================
The Function Input Iterator allows for creating iterators that encapsulate
a nullary function object and a state object which tracks the number of times
the iterator has been incremented. A Function Input Iterator models the
`InputIterator`_ concept and is useful for creating bounded input iterators.
.. _InputIterator: http://www.sgi.com/tech/stl/InputIterator.html
Like the Generator Iterator, the Function Input Iterator takes a function
that models the Generator_ concept (which is basically a nullary or 0-arity
function object). Each increment of the function Function Input Iterator
invokes the generator function and stores the value in the iterator. When
the iterator is dereferenced the stored value is returned.
.. _Generator: http://www.sgi.com/tech/stl/Generator.html
The Function Input Iterator encapsulates a state object which models the
`Incrementable Concept`_ and the EqualityComparable_ Concept. These concepts are
described below as:
.. _EqualityComparable: http://www.sgi.com/tech/stl/EqualityComparable.html
Incrementable Concept
---------------------
A type models the Incrementable Concept when it supports the pre- and post-
increment operators. For a given object ``i`` with type ``I``, the following
constructs should be valid:
========= ================= ===========
Construct Description Return Type
-----------------------------------------
i++ Post-increment i. I
++i Pre-increment i. I&
========= ================= ===========
NOTE: An Incrementable type should also be DefaultConstructible_.
.. _DefaultConstructible: http://www.sgi.com/tech/stl/DefaultConstructible.html
Synopsis
--------
::
namespace {
template <class Function, class State>
class function_input_iterator;
template <class Function, class State>
typename function_input_iterator<Function, State>
make_function_input_iterator(Function & f);
struct infinite;
}
Function Input Iterator Class
-----------------------------
The class Function Input Iterator class takes two template parameters
``Function`` and ``State``. These two template parameters tell the
Function Input Iterator the type of the function to encapsulate and
the type of the internal state value to hold.
The ``State`` parameter is important in cases where you want to
control the type of the counter which determines whether two iterators
are at the same state. This allows for creating a pair of iterators which
bound the range of the invocations of the encapsulated functions.
Examples
--------
The following example shows how we use the function input iterator class
in cases where we want to create bounded (lazy) generated ranges.
::
struct generator {
typedef int result_type;
generator() { srand(time(0)); }
result_type operator() () const {
return rand();
}
};
int main(int argc, char * argv[]) {
generator f;
copy(
make_function_input_iterator(f, 0),
make_function_input_iterator(f, 10),
ostream_iterator<int>(cout, " ")
);
return 0;
}
Here we can see that we've bounded the number of invocations using an ``int``
that counts from ``0`` to ``10``. Say we want to create an endless stream
of random numbers and encapsulate that in a pair of integers, we can do
it with the ``boost::infinite`` helper class.
::
copy(
make_function_input_iterator(f,infinite()),
make_function_input_iterator(f,infinite()),
ostream_iterator<int>(count, " ")
);
Above, instead of creating a huge vector we rely on the STL copy algorithm
to traverse the function input iterator and call the function object f
as it increments the iterator. The special property of ``boost::infinite``
is that equating two instances always yield false -- and that incrementing
an instance of ``boost::infinite`` doesn't do anything. This is an efficient
way of stating that the iterator range provided by two iterators with an
encapsulated infinite state will definitely be infinite.

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@ -3,7 +3,7 @@
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="generator" content="Docutils 0.5: http://docutils.sourceforge.net/" />
<meta name="generator" content="Docutils 0.6: http://docutils.sourceforge.net/" />
<title>The Boost.Iterator Library Boost</title>
<link rel="stylesheet" href="../../../rst.css" type="text/css" />
</head>
@ -11,9 +11,6 @@
<div class="document" id="the-boost-iterator-library-logo">
<h1 class="title">The Boost.Iterator Library <a class="reference external" href="../../../index.htm"><img alt="Boost" src="../../../boost.png" /></a></h1>
<!-- Distributed under the Boost -->
<!-- Software License, Version 1.0. (See accompanying -->
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
<!-- Distributed under the Boost -->
<!-- Software License, Version 1.0. (See accompanying -->
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
@ -40,7 +37,7 @@ Lab</a>, <a class="reference external" href="http://www.styleadvisor.com">Zephyr
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Abstract:</th><td class="field-body">The Boost Iterator Library contains two parts. The first
is a system of <a class="reference external" href="../../../more/generic_programming.html#concept">concepts</a> which extend the C++ standard
is a system of <a class="reference external" href="http://www.boost.org/more/generic_programming.html#concept">concepts</a> which extend the C++ standard
iterator requirements. The second is a framework of
components for building iterators based on these
extended concepts and includes several useful iterator
@ -60,21 +57,21 @@ older Boost Iterator Adaptor Library.</td>
<div class="contents topic" id="table-of-contents">
<p class="topic-title first"><strong>Table of Contents</strong></p>
<ul class="simple">
<li><a class="reference internal" href="#new-style-iterators" id="id22">New-Style Iterators</a></li>
<li><a class="reference internal" href="#iterator-facade-and-adaptor" id="id23">Iterator Facade and Adaptor</a></li>
<li><a class="reference internal" href="#specialized-adaptors" id="id24">Specialized Adaptors</a></li>
<li><a class="reference internal" href="#iterator-utilities" id="id25">Iterator Utilities</a><ul>
<li><a class="reference internal" href="#traits" id="id26">Traits</a></li>
<li><a class="reference internal" href="#testing-and-concept-checking" id="id27">Testing and Concept Checking</a></li>
<li><a class="reference internal" href="#new-style-iterators" id="id23">New-Style Iterators</a></li>
<li><a class="reference internal" href="#iterator-facade-and-adaptor" id="id24">Iterator Facade and Adaptor</a></li>
<li><a class="reference internal" href="#specialized-adaptors" id="id25">Specialized Adaptors</a></li>
<li><a class="reference internal" href="#iterator-utilities" id="id26">Iterator Utilities</a><ul>
<li><a class="reference internal" href="#traits" id="id27">Traits</a></li>
<li><a class="reference internal" href="#testing-and-concept-checking" id="id28">Testing and Concept Checking</a></li>
</ul>
</li>
<li><a class="reference internal" href="#upgrading-from-the-old-boost-iterator-adaptor-library" id="id28">Upgrading from the old Boost Iterator Adaptor Library</a></li>
<li><a class="reference internal" href="#history" id="id29">History</a></li>
<li><a class="reference internal" href="#upgrading-from-the-old-boost-iterator-adaptor-library" id="id29">Upgrading from the old Boost Iterator Adaptor Library</a></li>
<li><a class="reference internal" href="#history" id="id30">History</a></li>
</ul>
</div>
<hr class="docutils" />
<div class="section" id="new-style-iterators">
<h1><a class="toc-backref" href="#id22">New-Style Iterators</a></h1>
<h1><a class="toc-backref" href="#id23">New-Style Iterators</a></h1>
<p>The iterator categories defined in C++98 are extremely limiting
because they bind together two orthogonal concepts: traversal and
element access. For example, because a random access iterator is
@ -93,7 +90,7 @@ concepts, see our</p>
<a class="reference external" href="new-iter-concepts.html">Standard Proposal For New-Style Iterators</a> (<a class="reference external" href="new-iter-concepts.pdf">PDF</a>)</blockquote>
</div>
<div class="section" id="iterator-facade-and-adaptor">
<h1><a class="toc-backref" href="#id23">Iterator Facade and Adaptor</a></h1>
<h1><a class="toc-backref" href="#id24">Iterator Facade and Adaptor</a></h1>
<p>Writing standard-conforming iterators is tricky, but the need comes
up often. In order to ease the implementation of new iterators,
the Boost.Iterator library provides the <tt class="docutils literal"><span class="pre">iterator_facade</span></tt> class template,
@ -120,7 +117,7 @@ and accepted into the first C++ technical report; see our</p>
<p>for more details.</p>
</div>
<div class="section" id="specialized-adaptors">
<h1><a class="toc-backref" href="#id24">Specialized Adaptors</a></h1>
<h1><a class="toc-backref" href="#id25">Specialized Adaptors</a></h1>
<p>The iterator library supplies a useful suite of standard-conforming
iterator templates based on the Boost <a class="reference internal" href="#iterator-facade-and-adaptor">iterator facade and adaptor</a>.</p>
<ul class="simple">
@ -128,6 +125,9 @@ iterator templates based on the Boost <a class="reference internal" href="#itera
Implements a &quot;lazy sequence&quot;</li>
<li><a class="reference external" href="filter_iterator.html"><tt class="docutils literal"><span class="pre">filter_iterator</span></tt></a> (<a class="reference external" href="filter_iterator.pdf">PDF</a>): an iterator over the subset of elements of some
sequence which satisfy a given predicate</li>
<li><a class="reference external" href="function_input_iterator.html"><tt class="docutils literal"><span class="pre">function_input_iterator</span></tt></a> (<a class="reference external" href="function_input_iterator.pdf">PDF</a>): an input iterator wrapping a generator (nullary
function object); each time the iterator is dereferenced, the function object
is called to get the value to return.</li>
<li><a class="reference external" href="function_output_iterator.html"><tt class="docutils literal"><span class="pre">function_output_iterator</span></tt></a> (<a class="reference external" href="function_output_iterator.pdf">PDF</a>): an output iterator wrapping a unary function
object; each time an element is written into the dereferenced
iterator, it is passed as a parameter to the function object.</li>
@ -149,9 +149,9 @@ positions of heterogeneous underlying iterators.</li>
</ul>
</div>
<div class="section" id="iterator-utilities">
<h1><a class="toc-backref" href="#id25">Iterator Utilities</a></h1>
<h1><a class="toc-backref" href="#id26">Iterator Utilities</a></h1>
<div class="section" id="traits">
<h2><a class="toc-backref" href="#id26">Traits</a></h2>
<h2><a class="toc-backref" href="#id27">Traits</a></h2>
<ul class="simple">
<li><a class="reference external" href="pointee.html"><tt class="docutils literal"><span class="pre">pointee.hpp</span></tt></a> (<a class="reference external" href="pointee.pdf">PDF</a>): Provides the capability to deduce the referent types
of pointers, smart pointers and iterators in generic code. Used
@ -165,7 +165,7 @@ testing iterator interoperability -->
<!-- comment! __ interoperable.pdf -->
</div>
<div class="section" id="testing-and-concept-checking">
<h2><a class="toc-backref" href="#id27">Testing and Concept Checking</a></h2>
<h2><a class="toc-backref" href="#id28">Testing and Concept Checking</a></h2>
<ul class="simple">
<li><a class="reference external" href="iterator_concepts.html"><tt class="docutils literal"><span class="pre">iterator_concepts.hpp</span></tt></a> (<a class="reference external" href="iterator_concepts.pdf">PDF</a>): Concept checking classes for the new iterator concepts.</li>
<li><a class="reference external" href="iterator_archetypes.html"><tt class="docutils literal"><span class="pre">iterator_archetypes.hpp</span></tt></a> (<a class="reference external" href="iterator_archetypes.pdf">PDF</a>): Concept archetype classes for the new iterators concepts.</li>
@ -173,17 +173,17 @@ testing iterator interoperability -->
</div>
</div>
<div class="section" id="upgrading-from-the-old-boost-iterator-adaptor-library">
<h1><a class="toc-backref" href="#id28">Upgrading from the old Boost Iterator Adaptor Library</a></h1>
<h1><a class="toc-backref" href="#id29">Upgrading from the old Boost Iterator Adaptor Library</a></h1>
<p id="upgrading">If you have been using the old Boost Iterator Adaptor library to
implement iterators, you probably wrote a <tt class="docutils literal"><span class="pre">Policies</span></tt> class which
captures the core operations of your iterator. In the new library
design, you'll move those same core operations into the body of the
iterator class itself. If you were writing a family of iterators,
you probably wrote a <a class="reference external" href="../../../more/generic_programming.html#type_generator">type generator</a> to build the
you probably wrote a <a class="reference external" href="http://www.boost.org/more/generic_programming.html#type_generator">type generator</a> to build the
<tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> specialization you needed; in the new library
design you don't need a type generator (though may want to keep it
around as a compatibility aid for older code) because, due to the
use of the Curiously Recurring Template Pattern (CRTP) <a class="citation-reference" href="#cop95" id="id21">[Cop95]</a>,
use of the Curiously Recurring Template Pattern (CRTP) <a class="citation-reference" href="#cop95" id="id22">[Cop95]</a>,
you can now define the iterator class yourself and acquire
functionality through inheritance from <tt class="docutils literal"><span class="pre">iterator_facade</span></tt> or
<tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt>. As a result, you also get much finer control
@ -198,7 +198,7 @@ type, <tt class="docutils literal"><span class="pre">transform_iterator</span></
<tt class="docutils literal"><span class="pre">projection_iterator</span></tt> used to.</p>
</div>
<div class="section" id="history">
<h1><a class="toc-backref" href="#id29">History</a></h1>
<h1><a class="toc-backref" href="#id30">History</a></h1>
<p>In 2000 Dave Abrahams was writing an iterator for a container of
pointers, which would access the pointed-to elements when
dereferenced. Naturally, being a library writer, he decided to
@ -226,7 +226,7 @@ library you see today.</p>
<table class="docutils citation" frame="void" id="cop95" rules="none">
<colgroup><col class="label" /><col /></colgroup>
<tbody valign="top">
<tr><td class="label"><a class="fn-backref" href="#id21">[Cop95]</a></td><td>[Coplien, 1995] Coplien, J., Curiously Recurring Template
<tr><td class="label"><a class="fn-backref" href="#id22">[Cop95]</a></td><td>[Coplien, 1995] Coplien, J., Curiously Recurring Template
Patterns, C++ Report, February 1995, pp. 24-27.</td></tr>
</tbody>
</table>

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@ -43,7 +43,7 @@ __ ../../../index.htm
The components of the Boost Iterator Library replace the
older Boost Iterator Adaptor Library.
.. _concepts: ../../../more/generic_programming.html#concept
.. _concepts: http://www.boost.org/more/generic_programming.html#concept
.. contents:: **Table of Contents**
@ -138,7 +138,11 @@ iterator templates based on the Boost `iterator facade and adaptor`_.
* |filter|_ (PDF__): an iterator over the subset of elements of some
sequence which satisfy a given predicate
* |function|_ (PDF__): an output iterator wrapping a unary function
* |function_input|_ (PDF__): an input iterator wrapping a generator (nullary
function object); each time the iterator is dereferenced, the function object
is called to get the value to return.
* |function_output|_ (PDF__): an output iterator wrapping a unary function
object; each time an element is written into the dereferenced
iterator, it is passed as a parameter to the function object.
@ -171,8 +175,12 @@ __ counting_iterator.pdf
.. _filter: filter_iterator.html
__ filter_iterator.pdf
.. |function| replace:: ``function_output_iterator``
.. _function: function_output_iterator.html
.. |function_input| replace:: ``function_input_iterator``
.. _function_input: function_input_iterator.html
__ function_input_iterator.pdf
.. |function_output| replace:: ``function_output_iterator``
.. _function_output: function_output_iterator.html
__ function_output_iterator.pdf
.. |indirect| replace:: ``indirect_iterator``
@ -271,7 +279,7 @@ over how your iterator works: you can add additional constructors,
or even override the iterator functionality provided by the
library.
.. _`type generator`: ../../../more/generic_programming.html#type_generator
.. _`type generator`: http://www.boost.org/more/generic_programming.html#type_generator
If you're looking for the old ``projection_iterator`` component,
its functionality has been merged into ``transform_iterator``: as

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@ -866,7 +866,7 @@ operator -(iterator_facade&lt;Dr1,V1,TC1,R1,D1&gt; const&amp; lhs,
<p>In this section we'll walk through the implementation of a few
iterators using <tt class="docutils literal"><span class="pre">iterator_facade</span></tt>, based around the simple
example of a linked list of polymorphic objects. This example was
inspired by a <a class="reference external" href="http://thread.gmane.org/gmane.comp.lib.boost.user/5100">posting</a> by Keith Macdonald on the <a class="reference external" href="../../../more/mailing_lists.htm#users">Boost-Users</a>
inspired by a <a class="reference external" href="http://thread.gmane.org/gmane.comp.lib.boost.user/5100">posting</a> by Keith Macdonald on the <a class="reference external" href="http://www.boost.org/more/mailing_lists.htm#users">Boost-Users</a>
mailing list.</p>
<div class="section" id="the-problem">
<h2><a class="toc-backref" href="#id32">The Problem</a></h2>

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@ -8,7 +8,7 @@ example of a linked list of polymorphic objects. This example was
inspired by a `posting`__ by Keith Macdonald on the `Boost-Users`_
mailing list.
.. _`Boost-Users`: ../../../more/mailing_lists.htm#users
.. _`Boost-Users`: http://www.boost.org/more/mailing_lists.htm#users
__ http://thread.gmane.org/gmane.comp.lib.boost.user/5100

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@ -7,7 +7,7 @@ example of a linked list of polymorphic objects. This example was
inspired by a
[@http://thread.gmane.org/gmane.comp.lib.boost.user/5100 `posting`]
by Keith Macdonald on the
[@../../../more/mailing_lists.htm#users `Boost-Users`]
[@http://www.boost.org/more/mailing_lists.htm#users `Boost-Users`]
mailing list.

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@ -32,7 +32,7 @@
[section:intro Introduction]
[def _concepts_ [@../../more/generic_programming.html#concept concepts]]
[def _concepts_ [@http://www.boost.org/more/generic_programming.html#concept concepts]]
The Boost Iterator Library contains two parts. The first
is a system of _concepts_ which extend the C++ standard
@ -203,7 +203,7 @@ templates.
[section:upgrading Upgrading from the old Boost Iterator Adaptor Library]
[def _type_generator_ [@../../more/generic_programming.html#type_generator type generator]]
[def _type_generator_ [@http://www.boost.org/more/generic_programming.html#type_generator type generator]]
If you have been using the old Boost Iterator Adaptor library to
implement iterators, you probably wrote a `Policies` class which

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@ -6,6 +6,7 @@ sources = [
'counting_iterator.rst',
'facade-and-adaptor.rst',
'filter_iterator.rst',
'function_input_iterator.rst',
'function_output_iterator.rst',
'index.rst',
'indirect_iterator.rst',

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@ -1,4 +1,4 @@
// interator.hpp workarounds for non-conforming standard libraries ---------//
// iterator.hpp workarounds for non-conforming standard libraries ---------//
// (C) Copyright Beman Dawes 2000. Distributed under the Boost
// Software License, Version 1.0. (See accompanying file

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@ -47,9 +47,11 @@
#endif
#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) \
|| BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x531)) \
|| BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x5A0)) \
|| (BOOST_WORKAROUND(BOOST_INTEL_CXX_VERSION, <= 700) && defined(_MSC_VER)) \
|| BOOST_WORKAROUND(__DECCXX_VER, BOOST_TESTED_AT(60590042))
|| BOOST_WORKAROUND(__DECCXX_VER, BOOST_TESTED_AT(60590042)) \
|| BOOST_WORKAROUND(__SUNPRO_CC, BOOST_TESTED_AT(0x590))
# define BOOST_NO_LVALUE_RETURN_DETECTION
# if 0 // test code

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@ -0,0 +1,150 @@
// Copyright 2009 (C) Dean Michael Berris <me@deanberris.com>
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
#ifndef BOOST_FUNCTION_INPUT_ITERATOR
#define BOOST_FUNCTION_INPUT_ITERATOR
#include <boost/mpl/if.hpp>
#include <boost/function_types/is_function_pointer.hpp>
#include <boost/function_types/is_function_reference.hpp>
#include <boost/function_types/result_type.hpp>
#include <boost/iterator/iterator_facade.hpp>
namespace boost {
namespace impl {
template <class Function, class Input>
class function_input_iterator
: public iterator_facade<
function_input_iterator<Function, Input>,
typename Function::result_type,
single_pass_traversal_tag,
typename Function::result_type const &
>
{
public:
function_input_iterator() {}
function_input_iterator(Function & f_, Input state_ = Input())
: f(&f_), state(state_), value((*f)()) {}
void increment() {
value = (*f)();
++state;
}
typename Function::result_type const &
dereference() const {
return value;
}
bool equal(function_input_iterator const & other) const {
return f == other.f && state == other.state;
}
private:
Function * f;
Input state;
typename Function::result_type value;
};
template <class Function, class Input>
class function_pointer_input_iterator
: public iterator_facade<
function_pointer_input_iterator<Function, Input>,
typename function_types::result_type<Function>::type,
single_pass_traversal_tag,
typename function_types::result_type<Function>::type const &
>
{
public:
function_pointer_input_iterator() {}
function_pointer_input_iterator(Function &f_, Input state_ = Input())
: f(f_), state(state_), value((*f)())
{}
void increment() {
value = (*f)();
++state;
}
typename function_types::result_type<Function>::type const &
dereference() const {
return value;
}
bool equal(function_pointer_input_iterator const & other) const {
return f == other.f && state == other.state;
}
private:
Function f;
Input state;
typename function_types::result_type<Function>::type value;
};
template <class Function, class Input>
class function_reference_input_iterator
: public function_pointer_input_iterator<Function*,Input>
{
public:
function_reference_input_iterator(Function & f_, Input state_ = Input())
: function_pointer_input_iterator<Function*,Input>(&f_, state_)
{}
};
} // namespace impl
template <class Function, class Input>
class function_input_iterator
: public mpl::if_<
function_types::is_function_pointer<Function>,
impl::function_pointer_input_iterator<Function,Input>,
typename mpl::if_<
function_types::is_function_reference<Function>,
impl::function_reference_input_iterator<Function,Input>,
impl::function_input_iterator<Function,Input>
>::type
>::type
{
typedef typename mpl::if_<
function_types::is_function_pointer<Function>,
impl::function_pointer_input_iterator<Function,Input>,
typename mpl::if_<
function_types::is_function_reference<Function>,
impl::function_reference_input_iterator<Function,Input>,
impl::function_input_iterator<Function,Input>
>::type
>::type base_type;
public:
function_input_iterator(Function & f, Input i)
: base_type(f, i) {}
};
template <class Function, class Input>
inline function_input_iterator<Function, Input>
make_function_input_iterator(Function & f, Input state) {
typedef function_input_iterator<Function, Input> result_t;
return result_t(f, state);
}
template <class Function, class Input>
inline function_input_iterator<Function*, Input>
make_function_input_iterator(Function * f, Input state) {
typedef function_input_iterator<Function*, Input> result_t;
return result_t(f, state);
}
struct infinite {
infinite & operator++() { return *this; }
infinite & operator++(int) { return *this; }
bool operator==(infinite &) const { return false; };
bool operator==(infinite const &) const { return false; };
};
}
#endif

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@ -110,7 +110,7 @@ namespace boost
private:
typename super_t::reference dereference() const
{
# if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
# if BOOST_WORKAROUND(__BORLANDC__, < 0x5A0 )
return const_cast<super_t::reference>(**this->base());
# else
return **this->base();

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@ -24,9 +24,14 @@
#ifdef BOOST_ITERATOR_REF_CONSTNESS_KILLS_WRITABILITY
# include <boost/type_traits/remove_reference.hpp>
#else
# if BOOST_WORKAROUND(__CODEGEARC__, BOOST_TESTED_AT(0x610))
# include <boost/type_traits/add_reference.hpp>
# endif
#else
# include <boost/type_traits/add_reference.hpp>
#endif
#endif
#include <boost/iterator/detail/config_def.hpp>

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@ -105,6 +105,7 @@ namespace boost
typedef typename remove_const<ValueParam>::type value_type;
// Not the real associated pointer type
typedef typename mpl::eval_if<
boost::detail::iterator_writability_disabled<ValueParam,Reference>
, add_pointer<const value_type>
@ -323,7 +324,7 @@ namespace boost
static type make(Reference x)
{
return implicit_cast<type>(&x);
return boost::implicit_cast<type>(&x);
}
};
@ -433,26 +434,26 @@ namespace boost
# ifdef BOOST_NO_STRICT_ITERATOR_INTEROPERABILITY
# define BOOST_ITERATOR_FACADE_INTEROP_HEAD(prefix, op, result_type) \
template < \
class Derived1, class V1, class TC1, class R1, class D1 \
, class Derived2, class V2, class TC2, class R2, class D2 \
class Derived1, class V1, class TC1, class Reference1, class Difference1 \
, class Derived2, class V2, class TC2, class Reference2, class Difference2 \
> \
prefix typename mpl::apply2<result_type,Derived1,Derived2>::type \
operator op( \
iterator_facade<Derived1, V1, TC1, R1, D1> const& lhs \
, iterator_facade<Derived2, V2, TC2, R2, D2> const& rhs)
iterator_facade<Derived1, V1, TC1, Reference1, Difference1> const& lhs \
, iterator_facade<Derived2, V2, TC2, Reference2, Difference2> const& rhs)
# else
# define BOOST_ITERATOR_FACADE_INTEROP_HEAD(prefix, op, result_type) \
template < \
class Derived1, class V1, class TC1, class R1, class D1 \
, class Derived2, class V2, class TC2, class R2, class D2 \
class Derived1, class V1, class TC1, class Reference1, class Difference1 \
, class Derived2, class V2, class TC2, class Reference2, class Difference2 \
> \
prefix typename boost::detail::enable_if_interoperable< \
Derived1, Derived2 \
, typename mpl::apply2<result_type,Derived1,Derived2>::type \
>::type \
operator op( \
iterator_facade<Derived1, V1, TC1, R1, D1> const& lhs \
, iterator_facade<Derived2, V2, TC2, R2, D2> const& rhs)
iterator_facade<Derived1, V1, TC1, Reference1, Difference1> const& lhs \
, iterator_facade<Derived2, V2, TC2, Reference2, Difference2> const& rhs)
# endif
# define BOOST_ITERATOR_FACADE_PLUS_HEAD(prefix,args) \
@ -470,8 +471,7 @@ namespace boost
//
class iterator_core_access
{
# if defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS) \
|| BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
# if defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS)
// Tasteless as this may seem, making all members public allows member templates
// to work in the absence of member template friends.
public:
@ -618,6 +618,12 @@ namespace boost
Value, CategoryOrTraversal, Reference, Difference
> associated_types;
typedef boost::detail::operator_arrow_result<
typename associated_types::value_type
, Reference
, typename associated_types::pointer
> pointer_;
protected:
// For use by derived classes
typedef iterator_facade<Derived,Value,CategoryOrTraversal,Reference,Difference> iterator_facade_;
@ -627,7 +633,9 @@ namespace boost
typedef typename associated_types::value_type value_type;
typedef Reference reference;
typedef Difference difference_type;
typedef typename associated_types::pointer pointer;
typedef typename pointer_::type pointer;
typedef typename associated_types::iterator_category iterator_category;
reference operator*() const
@ -635,18 +643,9 @@ namespace boost
return iterator_core_access::dereference(this->derived());
}
typename boost::detail::operator_arrow_result<
value_type
, reference
, pointer
>::type
operator->() const
pointer operator->() const
{
return boost::detail::operator_arrow_result<
value_type
, reference
, pointer
>::make(*this->derived());
return pointer_::make(*this->derived());
}
typename boost::detail::operator_brackets_result<Derived,Value,reference>::type

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@ -7,7 +7,6 @@
#ifndef BOOST_TRANSFORM_ITERATOR_23022003THW_HPP
#define BOOST_TRANSFORM_ITERATOR_23022003THW_HPP
#include <boost/function.hpp>
#include <boost/iterator.hpp>
#include <boost/iterator/detail/enable_if.hpp>
#include <boost/iterator/iterator_adaptor.hpp>
@ -21,6 +20,8 @@
#include <boost/type_traits/is_reference.hpp>
#include <boost/type_traits/remove_const.hpp>
#include <boost/type_traits/remove_reference.hpp>
#include <boost/utility/result_of.hpp>
#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1310))
# include <boost/type_traits/is_base_and_derived.hpp>
@ -36,33 +37,16 @@ namespace boost
namespace detail
{
template <class UnaryFunc>
struct function_object_result
{
typedef typename UnaryFunc::result_type type;
};
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
template <class Return, class Argument>
struct function_object_result<Return(*)(Argument)>
{
typedef Return type;
};
#endif
// Compute the iterator_adaptor instantiation to be used for transform_iterator
template <class UnaryFunc, class Iterator, class Reference, class Value>
struct transform_iterator_base
{
private:
// By default, dereferencing the iterator yields the same as
// the function. Do we need to adjust the way
// function_object_result is computed for the standard
// proposal (e.g. using Doug's result_of)?
// the function.
typedef typename ia_dflt_help<
Reference
, function_object_result<UnaryFunc>
, result_of<UnaryFunc(typename std::iterator_traits<Iterator>::reference)>
>::type reference;
// To get the default for Value: remove any reference on the
@ -114,7 +98,7 @@ namespace boost
#endif
}
template<
template <
class OtherUnaryFunction
, class OtherIterator
, class OtherReference

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@ -357,7 +357,7 @@ namespace boost {
{
typedef typename tuple_impl_specific::tuple_meta_transform<
IteratorTuple
, iterator_traversal<>
, pure_traversal_tag<iterator_traversal<> >
>::type tuple_of_traversal_tags;
typedef typename tuple_impl_specific::tuple_meta_accumulate<

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@ -1,6 +1,9 @@
// Copyright David Abrahams 2004. Distributed under the Boost
// Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
// See www.boost.org/libs/iterator for documentation.
#ifndef ITERATOR_ADAPTORS_DWA2004725_HPP
# define ITERATOR_ADAPTORS_DWA2004725_HPP

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@ -1,59 +0,0 @@
// (C) Copyright David Abrahams and Jeremy Siek 2000-2001.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// Revision History:
// 04 Jan 2001 Factored counting_iterator stuff into
// boost/counting_iterator.hpp (David Abrahams)
#ifndef BOOST_INTEGER_RANGE_HPP_
#define BOOST_INTEGER_RANGE_HPP_
#include <boost/config.hpp>
#include <boost/iterator/counting_iterator.hpp>
#include <algorithm>
namespace boost {
//=============================================================================
// Counting Iterator and Integer Range Class
template <class IntegerType>
struct integer_range {
typedef counting_iterator<IntegerType> iterator;
typedef iterator const_iterator;
typedef IntegerType value_type;
typedef std::ptrdiff_t difference_type;
typedef IntegerType reference;
typedef IntegerType const_reference;
typedef const IntegerType* pointer;
typedef const IntegerType* const_pointer;
typedef IntegerType size_type;
integer_range(IntegerType start, IntegerType finish)
: m_start(start), m_finish(finish) { }
iterator begin() const { return iterator(m_start); }
iterator end() const { return iterator(m_finish); }
size_type size() const { return m_finish - m_start; }
bool empty() const { return m_finish == m_start; }
void swap(integer_range& x) {
std::swap(m_start, x.m_start);
std::swap(m_finish, x.m_finish);
}
protected:
IntegerType m_start, m_finish;
};
template <class IntegerType>
inline integer_range<IntegerType>
make_integer_range(IntegerType first, IntegerType last)
{
return integer_range<IntegerType>(first, last);
}
} // namespace boost
#endif // BOOST_INTEGER_RANGE_HPP_

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@ -43,5 +43,6 @@ test-suite iterator
[ run iterator_traits_test.cpp ]
[ run permutation_iterator_test.cpp : : : # <stlport-iostream>on
]
[ run function_input_iterator_test.cpp ]
;

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@ -0,0 +1,70 @@
// Copyright 2010 (c) Dean Michael Berris
// Distributed under the Boost Software License Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#include <boost/iterator/function_input_iterator.hpp>
#include <vector>
#include <iterator>
#include <cassert>
#include <algorithm>
#include <iostream>
struct ones {
typedef int result_type;
result_type operator() () {
return 1;
}
};
int ones_function () {
return 1;
}
using namespace std;
int main(int argc, char * argv[])
{
// test the iterator with function objects
ones ones_generator;
vector<int> values(10);
generate(values.begin(), values.end(), ones());
vector<int> generated;
copy(
boost::make_function_input_iterator(ones_generator, 0),
boost::make_function_input_iterator(ones_generator, 10),
back_inserter(generated)
);
assert(values.size() == generated.size());
assert(equal(values.begin(), values.end(), generated.begin()));
cout << "function iterator test with function objects successful." << endl;
// test the iterator with normal functions
vector<int>().swap(generated);
copy(
boost::make_function_input_iterator(&ones_function, 0),
boost::make_function_input_iterator(&ones_function, 10),
back_inserter(generated)
);
assert(values.size() == generated.size());
assert(equal(values.begin(), values.end(), generated.begin()));
cout << "function iterator test with pointer to function successful." << endl;
// test the iterator with a reference to a function
vector<int>().swap(generated);
copy(
boost::make_function_input_iterator(ones_function, 0),
boost::make_function_input_iterator(ones_function, 10),
back_inserter(generated)
);
assert(values.size() == generated.size());
assert(equal(values.begin(), values.end(), generated.begin()));
cout << "function iterator test with reference to function successful." << endl;
return 0;
}

0
test/interoperable.cpp Executable file → Normal file
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0
test/is_lvalue_iterator.cpp Executable file → Normal file
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0
test/is_readable_iterator.cpp Executable file → Normal file
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0
test/iter_archetype_default_ctor.cpp Executable file → Normal file
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6
test/iterator_facade.cpp Executable file → Normal file
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@ -87,6 +87,10 @@ struct input_iter
}
};
template <class T, class U>
void same_type(U const&)
{ BOOST_MPL_ASSERT((boost::is_same<T,U>)); }
int main()
{
int state = 0;
@ -101,6 +105,8 @@ int main()
input_iter p;
(*p).mutator();
p->mutator();
same_type<input_iter::pointer>(p.operator->());
return boost::report_errors();
}

0
test/pointee.cpp Executable file → Normal file
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@ -102,6 +102,17 @@ int mult_2(int arg)
return arg*2;
}
struct polymorphic_mult_functor
{
//Implement result_of protocol
template <class FArgs> struct result;
template <class F, class T> struct result<F(T )> {typedef T type;};
template <class F, class T> struct result<F(T& )> {typedef T type;};
template <class F, class T> struct result<F(const T&)> {typedef T type;};
template <class T>
T operator()(const T& _arg) const {return _arg*2;}
};
int
main()
@ -244,5 +255,25 @@ main()
);
}
// Test transform_iterator with polymorphic object function
{
int x[N], y[N];
for (int k = 0; k < N; ++k)
x[k] = k;
std::copy(x, x + N, y);
for (int k2 = 0; k2 < N; ++k2)
x[k2] = x[k2] * 2;
boost::input_iterator_test(
boost::make_transform_iterator(y, polymorphic_mult_functor()), x[0], x[1]);
boost::input_iterator_test(
boost::make_transform_iterator(&y[0], polymorphic_mult_functor()), x[0], x[1]);
boost::random_access_readable_iterator_test(
boost::make_transform_iterator(y, polymorphic_mult_functor()), N, x);
}
return boost::report_errors();
}

24
test/zip_iterator_test.cpp Executable file → Normal file
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@ -46,6 +46,7 @@
#include <vector>
#include <list>
#include <set>
#include <string>
#include <functional>
#include <boost/tuple/tuple.hpp>
#include <boost/iterator/transform_iterator.hpp>
@ -60,6 +61,27 @@ struct pure_traversal
typename boost::iterator_traversal<It>::type
>
{};
/// Tests for https://svn.boost.org/trac/boost/ticket/1517
int to_value(int const &v)
{
return v;
}
void category_test()
{
std::list<int> rng1;
std::string rng2;
boost::make_zip_iterator(
boost::make_tuple(
boost::make_transform_iterator(rng1.begin(), &to_value), // BidirectionalInput
rng2.begin() // RandomAccess
)
);
}
///
/////////////////////////////////////////////////////////////////////////////
//
@ -70,6 +92,8 @@ struct pure_traversal
int main( void )
{
category_test();
std::cout << "\n"
<< "***********************************************\n"
<< "* *\n"