| <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"> |
| <span class="bold"><strong>boost 1.56.0 :</strong></span> |
| <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem"> |
| Added <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">conversion</span><span class="special">::</span><span class="identifier">try_lexical_convert</span></code> functions. |
| </li></ul></div> |
| </li> |
| <li class="listitem"> |
| <span class="bold"><strong>boost 1.54.0 :</strong></span> |
| <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem"> |
| Fix some issues with <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">int128_type</span></code> |
| and <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">uint128_type</span></code> conversions. Notify |
| user at compile time if the <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">numeric_limits</span></code> |
| are not specialized for 128bit types and <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">lexical_cast</span></code> |
| can not make conversions. |
| </li></ul></div> |
| </li> |
| <li class="listitem"> |
| <span class="bold"><strong>boost 1.54.0 :</strong></span> |
| <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "> |
| <li class="listitem"> |
| Added code to convert <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">int128_type</span></code> |
| and <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">uint128_type</span></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"><span class="identifier">lexical_cast</span></code> |
| function (was broken in 1.53.0). |
| </li> |
| </ul></div> |
| </li> |
| <li class="listitem"> |
| <span class="bold"><strong>boost 1.53.0 :</strong></span> |
| <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"> |
| <span class="bold"><strong>boost 1.52.0 :</strong></span> |
| <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"><span class="identifier">lexical_cast</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">CharType</span><span class="special">*</span> |
| <span class="identifier">chars</span><span class="special">,</span> |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">count</span><span class="special">)</span></code> function overload. |
| </li> |
| </ul></div> |
| </li> |
| <li class="listitem"> |
| <span class="bold"><strong>boost 1.51.0 :</strong></span> |
| <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem"> |
| Better performance, less memory usage for <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">array</span><span class="special"><</span><span class="identifier">character_type</span><span class="special">,</span> <span class="identifier">N</span><span class="special">></span></code> and <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">array</span><span class="special"><</span><span class="identifier">character_type</span><span class="special">,</span> <span class="identifier">N</span><span class="special">></span></code> conversions. |
| </li></ul></div> |
| </li> |
| <li class="listitem"> |
| <span class="bold"><strong>boost 1.50.0 :</strong></span> |
| <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">bad_lexical_cast</span></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"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">iterator_range</span><span class="special"><</span><span class="identifier">character_type</span><span class="special">*></span></code> |
| conversions. |
| </li> |
| </ul></div> |
| </li> |
| <li class="listitem"> |
| <span class="bold"><strong>boost 1.49.0 :</strong></span> |
| <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"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">container</span><span class="special">::</span><span class="identifier">basic_string</span></code> |
| conversions. |
| </li> |
| </ul></div> |
| </li> |
| <li class="listitem"> |
| <span class="bold"><strong>boost 1.48.0 :</strong></span> |
| <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"><span class="keyword">sizeof</span><span class="special">(</span><span class="keyword">double</span><span class="special">)</span> <span class="special"><</span> <span class="keyword">sizeof</span><span class="special">(</span><span class="keyword">long</span> <span class="keyword">double</span><span class="special">)</span></code>). |
| </li> |
| </ul></div> |
| </li> |
| <li class="listitem"> |
| <span class="bold"><strong>boost 1.47.0 :</strong></span> |
| <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"> |
| <span class="bold"><strong>boost 1.34.0 :</strong></span> |
| <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"> |
| <span class="bold"><strong>boost 1.33.0 :</strong></span> |
| <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"> |
| <span class="bold"><strong>Earlier :</strong></span> |
| <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"><span class="identifier">std</span><span class="special">::</span><span class="identifier">numeric_limits</span></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"><span class="identifier">lexical_cast</span></code> |
| now supports conversions from <code class="computeroutput"><span class="keyword">wchar_t</span></code>, |
| <code class="computeroutput"><span class="keyword">wchar_t</span> <span class="special">*</span></code>, |
| and <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">wstring</span></code> and to <code class="computeroutput"><span class="keyword">wchar_t</span></code> |
| and <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">wstring</span></code>. |
| </li> |
| <li class="listitem"> |
| The previous version of <code class="computeroutput"><span class="identifier">lexical_cast</span></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"><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span></code> |
| and, where supported, <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">wstring</span></code>: |
| <code class="computeroutput"><span class="identifier">lexical_cast</span><span class="special"><</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">>(</span><span class="string">"Hello, World"</span><span class="special">)</span></code> |
| succeeds instead of failing with a <code class="computeroutput"><span class="identifier">bad_lexical_cast</span></code> |
| exception. |
| </li> |
| <li class="listitem"> |
| The previous version of <code class="computeroutput"><span class="identifier">lexical_cast</span></code> |
| allowed unsafe and meaningless conversions to pointers. The current |
| version now throws a <code class="computeroutput"><span class="identifier">bad_lexical_cast</span></code> |
| for conversions to pointers: <code class="computeroutput"><span class="identifier">lexical_cast</span><span class="special"><</span><span class="keyword">char</span> |
| <span class="special">*>(</span><span class="string">"Goodbye, |
| World"</span><span class="special">)</span></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<br>Copyright © 2006-2010 Alexander Nasonov<br>Copyright © 2011-2014 Antony |
| Polukhin<p> |
| 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>) |
| </p> |
| </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> |
