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<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>Changes</title> <link rel="stylesheet" href="../../../doc/src/boostbook.css" type="text/css"> <meta name="generator" content="DocBook XSL Stylesheets V1.78.1"> <link rel="home" href="../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> <link rel="up" href="../boost_lexical_cast.html" title="Chapter 17. Boost.Lexical_Cast 1.0"> <link rel="prev" href="frequently_asked_questions.html" title="Frequently Asked Questions"> <link rel="next" href="performance.html" title="Performance"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table cellpadding="2" width="100%"><tr> <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../boost.png"></td> <td align="center"><a href="../../../index.html">Home</a></td> <td align="center"><a href="../../../libs/libraries.htm">Libraries</a></td> <td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> <td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> <td align="center"><a href="../../../more/index.htm">More</a></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="frequently_asked_questions.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../boost_lexical_cast.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="performance.html"><img src="../../../doc/src/images/next.png" alt="Next"></a> </div> <div class="section"> <div class="titlepage"><div><div><h2 class="title" style="clear: both"> <a name="boost_lexical_cast.changes"></a><a class="link" href="changes.html" title="Changes">Changes</a> </h2></div></div></div> <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> <li class="listitem"> boost 1.56.0 : <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem"> Added <code class="computeroutput">boost::conversion::try_lexical_convert</code> functions. </li></ul></div> </li> <li class="listitem"> boost 1.54.0 : <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem"> Fix some issues with <code class="computeroutput">boost::int128_type</code> and <code class="computeroutput">boost::uint128_type</code> conversions. Notify user at compile time if the <code class="computeroutput">std::numeric_limits</code> are not specialized for 128bit types and <code class="computeroutput">boost::lexical_cast</code> can not make conversions. </li></ul></div> </li> <li class="listitem"> boost 1.54.0 : <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "> <li class="listitem"> Added code to convert <code class="computeroutput">boost::int128_type</code> and <code class="computeroutput">boost::uint128_type</code> types (requires GCC 4.7 or higher). </li> <li class="listitem"> Conversions to pointers will now fail to compile, instead of throwing at runtime. </li> <li class="listitem"> Restored ability to get pointers to <code class="computeroutput">lexical_cast</code> function (was broken in 1.53.0). </li> </ul></div> </li> <li class="listitem"> boost 1.53.0 : <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem"> Much better input and output streams detection for user defined types. </li></ul></div> </li> <li class="listitem"> boost 1.52.0 : <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "> <li class="listitem"> Restored compilation on MSVC-2003 (was broken in 1.51.0). </li> <li class="listitem"> Added <code class="computeroutput">lexical_cast(const CharType* chars, std::size_t count)</code> function overload. </li> </ul></div> </li> <li class="listitem"> boost 1.51.0 : <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem"> Better performance, less memory usage for <code class="computeroutput">boost::array<character_type, N></code> and <code class="computeroutput">std::array<character_type, N></code> conversions. </li></ul></div> </li> <li class="listitem"> boost 1.50.0 : <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "> <li class="listitem"> <code class="computeroutput">boost::bad_lexical_cast</code> exception is now globaly visible and can be catched even if code is compiled with -fvisibility=hidden. </li> <li class="listitem"> Now it is possible to compile library with disabled exceptions. </li> <li class="listitem"> Better performance, less memory usage and bugfixes for <code class="computeroutput">boost::iterator_range<character_type*></code> conversions. </li> </ul></div> </li> <li class="listitem"> boost 1.49.0 : <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "> <li class="listitem"> Restored work with typedefed wchar_t (compilation flag /Zc:wchar_t- for Visual Studio). </li> <li class="listitem"> Better performance and less memory usage for <code class="computeroutput">boost::container::basic_string</code> conversions. </li> </ul></div> </li> <li class="listitem"> boost 1.48.0 : <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "> <li class="listitem"> Added code to work with Inf and NaN on any platform. </li> <li class="listitem"> Better performance and less memory usage for conversions to float type (and to double type, if <code class="computeroutput">sizeof(double) < sizeof(long double)</code>). </li> </ul></div> </li> <li class="listitem"> boost 1.47.0 : <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "> <li class="listitem"> Optimizations for "C" and other locales without number grouping. </li> <li class="listitem"> Better performance and less memory usage for unsigned char and signed char conversions. </li> <li class="listitem"> Better performance and less memory usage for conversions to arithmetic types. </li> <li class="listitem"> Better performance and less memory usage for conversions from arithmetic type to arithmetic type. </li> <li class="listitem"> Directly construct Target from Source on some conversions (like conversions from string to string, from char array to string, from char to char and others). </li> </ul></div> </li> <li class="listitem"> boost 1.34.0 : <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem"> Better performance for many combinations of Source and Target types. For more details refer to Alexander Nasonovs article <a href="http://accu.org/index.php/journals/1375" target="_top">Fine Tuning for lexical_cast, Overload #74, August 2006</a> <a href="http://www.accu.org/var/uploads/journals/overload74.pdf" target="_top">(PDF)</a>. </li></ul></div> </li> <li class="listitem"> boost 1.33.0 : <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "> <li class="listitem"> Call-by-const reference for the parameters. This requires partial specialization of class templates, so it doesn't work for MSVC 6, and it uses the original pass by value there. </li> <li class="listitem"> The MSVC 6 support is deprecated, and will be removed in a future Boost version. </li> </ul></div> </li> <li class="listitem"> Earlier : <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "> <li class="listitem"> The previous version of lexical_cast used the default stream precision for reading and writing floating-point numbers. For numerics that have a corresponding specialization of <code class="computeroutput">std::numeric_limits</code>, the current version now chooses a precision to match. </li> <li class="listitem"> The previous version of lexical_cast did not support conversion to or from any wide-character-based types. For compilers with full language and library support for wide characters, <code class="computeroutput">lexical_cast</code> now supports conversions from <code class="computeroutput">wchar_t</code>, <code class="computeroutput">wchar_t *</code>, and <code class="computeroutput">std::wstring</code> and to <code class="computeroutput">wchar_t</code> and <code class="computeroutput">std::wstring</code>. </li> <li class="listitem"> The previous version of <code class="computeroutput">lexical_cast</code> assumed that the conventional stream extractor operators were sufficient for reading values. However, string I/O is asymmetric, with the result that spaces play the role of I/O separators rather than string content. The current version fixes this error for <code class="computeroutput">std::string</code> and, where supported, <code class="computeroutput">std::wstring</code>: <code class="computeroutput">lexical_cast<std::string>("Hello, World")</code> succeeds instead of failing with a <code class="computeroutput">bad_lexical_cast</code> exception. </li> <li class="listitem"> The previous version of <code class="computeroutput">lexical_cast</code> allowed unsafe and meaningless conversions to pointers. The current version now throws a <code class="computeroutput">bad_lexical_cast</code> for conversions to pointers: <code class="computeroutput">lexical_cast<char *>("Goodbye, World")</code> now throws an exception instead of causing undefined behavior. </li> </ul></div> </li> </ul></div> </div> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <td align="left"></td> <td align="right"><div class="copyright-footer">Copyright © 2000-2005 Kevlin Henney Copyright © 2006-2010 Alexander Nasonov Copyright © 2011-2014 Antony Polukhin Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) </div></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="frequently_asked_questions.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../boost_lexical_cast.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="performance.html"><img src="../../../doc/src/images/next.png" alt="Next"></a> </div> </body> </html>