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Ported compressed_pair documentation to Quickbook
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<html>
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<head>
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<title>Header </title>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<meta name="Template" content="C:\PROGRAM FILES\MICROSOFT OFFICE\OFFICE\html.dot">
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<meta name="GENERATOR" content="Microsoft FrontPage 5.0">
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<boostcompressed_pair.hpp>
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</head>
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<body bgcolor="#ffffff" text="#000000" link="#0000ff" vlink="#800080">
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<h2><img src="../../boost.png" width="276" height="86">Header <<a href="../../boost/detail/compressed_pair.hpp">boost/compressed_pair.hpp</a>></h2>
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<p>All of the contents of <boost/compressed_pair.hpp> are defined inside
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namespace boost.</p>
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<p>The class compressed pair is very similar to std::pair, but if either of the
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template arguments are empty classes, then the "empty base-class optimisation"
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is applied to compress the size of the pair.</p>
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<pre>template <class T1, class T2>
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class compressed_pair
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{
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public:
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typedef T1 first_type;
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typedef T2 second_type;
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typedef typename call_traits<first_type>::param_type first_param_type;
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typedef typename call_traits<second_type>::param_type second_param_type;
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typedef typename call_traits<first_type>::reference first_reference;
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typedef typename call_traits<second_type>::reference second_reference;
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typedef typename call_traits<first_type>::const_reference first_const_reference;
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typedef typename call_traits<second_type>::const_reference second_const_reference;
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compressed_pair() : base() {}
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compressed_pair(first_param_type x, second_param_type y);
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explicit compressed_pair(first_param_type x);
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explicit compressed_pair(second_param_type y);
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compressed_pair& operator=(const compressed_pair&);
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first_reference first();
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first_const_reference first() const;
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second_reference second();
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second_const_reference second() const;
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void swap(compressed_pair& y);
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};</pre>
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<p>The two members of the pair can be accessed using the member functions first()
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and second(). Note that not all member functions can be instantiated for all
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template parameter types. In particular compressed_pair can be instantiated for
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reference and array types, however in these cases the range of constructors
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that can be used are limited. If types T1 and T2 are the same type, then there
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is only one version of the single-argument constructor, and this constructor
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initialises both values in the pair to the passed value.</p>
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<P>Note that if either member is a POD type, then that member is not
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zero-initialized by the compressed_pair default constructor: it's up to you to
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supply an initial value for these types if you want them to have a default
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value.</P>
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<p>Note that compressed_pair can not be instantiated if either of the template
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arguments is a union type, unless there is compiler support for
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boost::is_union, or if boost::is_union is specialised for the union type.</p>
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<p>Finally, a word of caution for Visual C++ 6 users: if either argument is an
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empty type, then assigning to that member will produce memory corruption,
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unless the empty type has a "do nothing" assignment operator defined. This is
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due to a bug in the way VC6 generates implicit assignment operators.</p>
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<h3>Acknowledgements</h3>
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<p>Based on contributions by Steve Cleary, Beman Dawes, Howard Hinnant and John
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Maddock.</p>
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<p>Maintained by <a href="mailto:john@johnmaddock.co.uk">John Maddock</a>, the
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latest version of this file can be found at <a href="http://www.boost.org">www.boost.org</a>,
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and the boost discussion list at <a href="http://www.yahoogroups.com/list/boost">www.yahoogroups.com/list/boost</a>.</p>
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<hr>
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<p>Revised
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<!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B %Y" startspan -->07 November 2007<!--webbot bot="Timestamp" endspan i-checksum="40338" --></p>
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<p>© Copyright Beman Dawes, 2000.</p>
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<p>Distributed under the Boost Software License, Version 1.0. See
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<a href="http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a></p>
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</body>
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</html>
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@ -61,6 +61,25 @@ boostbook standalone_base_from_member
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<xsl:param>generate.section.toc.level=1
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;
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xml compressed_pair : compressed_pair.qbk ;
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boostbook standalone_compressed_pair
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:
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compressed_pair
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:
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# File name of HTML output:
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<xsl:param>root.filename=compressed_pair
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# How far down we chunk nested sections, basically all of them:
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<xsl:param>chunk.section.depth=0
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# Don't put the first section on the same page as the TOC:
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<xsl:param>chunk.first.sections=0
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# How far down sections get TOC's
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<xsl:param>toc.section.depth=1
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# Max depth in each TOC:
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<xsl:param>toc.max.depth=1
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# How far down we go with TOC's
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<xsl:param>generate.section.toc.level=1
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;
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xml declval : declval.qbk ;
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boostbook standalone_declval
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:
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99
doc/compressed_pair.qbk
Normal file
99
doc/compressed_pair.qbk
Normal file
@ -0,0 +1,99 @@
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[/
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Copyright 2000 Beman Dawes & John Maddock.
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Distributed under the Boost Software License, Version 1.0.
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See accompanying file LICENSE_1_0.txt
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or copy at http://boost.org/LICENSE_1_0.txt
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]
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[article Compressed_Pair
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[quickbook 1.5]
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[authors [Cleary, Steve]]
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[authors [Dawes, Beman]]
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[authors [Hinnant, Howard]]
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[authors [Maddock, John]]
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[copyright 2000 Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock]
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[license
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE_1_0.txt or copy at
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[@http://www.boost.org/LICENSE_1_0.txt])
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]
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]
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[section Overview]
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All of the contents of `<boost/compressed_pair.hpp>` are defined inside
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`namespace boost`.
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The class `compressed_pair` is very similar to `std::pair`, but if either of
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the template arguments are empty classes, then the ['empty base-class
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optimisation] is applied to compress the size of the pair.
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[endsect]
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[section Synopsis]
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template <class T1, class T2>
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class compressed_pair
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{
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public:
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typedef T1 first_type;
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typedef T2 second_type;
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typedef typename call_traits<first_type>::param_type first_param_type;
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typedef typename call_traits<second_type>::param_type second_param_type;
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typedef typename call_traits<first_type>::reference first_reference;
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typedef typename call_traits<second_type>::reference second_reference;
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typedef typename call_traits<first_type>::const_reference first_const_reference;
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typedef typename call_traits<second_type>::const_reference second_const_reference;
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compressed_pair() : base() {}
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compressed_pair(first_param_type x, second_param_type y);
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explicit compressed_pair(first_param_type x);
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explicit compressed_pair(second_param_type y);
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compressed_pair& operator=(const compressed_pair&);
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first_reference first();
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first_const_reference first() const;
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second_reference second();
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second_const_reference second() const;
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void swap(compressed_pair& y);
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};
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The two members of the pair can be accessed using the member functions
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`first()` and `second()`. Note that not all member functions can be
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instantiated for all template parameter types. In particular
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`compressed_pair` can be instantiated for reference and array types,
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however in these cases the range of constructors that can be used are
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limited. If types `T1` and `T2` are the same type, then there is only
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one version of the single-argument constructor, and this constructor
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initialises both values in the pair to the passed value.
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Note that if either member is a POD type, then that member is not
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zero-initialized by the `compressed_pair` default constructor: it's up
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to you to supply an initial value for these types if you want them to have
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a default value.
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Note that `compressed_pair` can not be instantiated if either of the
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template arguments is a union type, unless there is compiler support for
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`boost::is_union`, or if `boost::is_union` is specialised for the union
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type.
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Finally, a word of caution for Visual C++ 6 users: if either argument is an
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empty type, then assigning to that member will produce memory corruption,
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unless the empty type has a "do nothing" assignment operator defined. This
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is due to a bug in the way VC6 generates implicit assignment operators.
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[endsect]
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[section Acknowledgments]
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Based on contributions by Steve Cleary, Beman Dawes, Howard Hinnant and
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John Maddock.
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Maintained by [@mailto:john@johnmaddock.co.uk John Maddock].
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[endsect]
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// See http://www.boost.org/libs/utility for most recent version including documentation.
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// compressed_pair: pair that "compresses" empty members
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// (see libs/utility/compressed_pair.htm)
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// (see libs/utility/doc/html/compressed_pair.html)
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//
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// JM changes 25 Jan 2004:
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// For the case where T1 == T2 and both are empty, then first() and second()
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<a href="utility.htm#BOOST_BINARY">BOOST_BINARY</a><br>
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<a href="call_traits.htm">call_traits</a><br>
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<a href="checked_delete.html">checked_delete</a><br>
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<a href="compressed_pair.htm">compressed_pair</a><br>
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<a href="doc/html/compressed_pair.html">compressed_pair</a><br>
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<a href="doc/html/declval.html">declval</a><br>
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<a href="enable_if.html">enable_if</a><br>
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<a href="in_place_factories.html">in_place_factory</a><br>
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