1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Locale Support</title> 5<link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../../index.html" title="Chapter 1. Boost.Convert 2.0"> 8<link rel="up" href="../stream_converter.html" title="boost::cnv::stream Converter"> 9<link rel="prev" href="../stream_converter.html" title="boost::cnv::stream Converter"> 10<link rel="next" href="supported_string_types.html" title="Supported String Types"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="../stream_converter.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../stream_converter.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="supported_string_types.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h4 class="title"> 27<a name="boost_convert.converters_detail.stream_converter.locale_support"></a><a class="link" href="locale_support.html" title="Locale Support">Locale 28 Support</a> 29</h4></div></div></div> 30<p> 31 Locale support is similar to the formatting support as demonstrated by 32 the following example: 33 </p> 34<p> 35</p> 36<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">cnv</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">cnv</span><span class="special">;</span> 37<span class="keyword">namespace</span> <span class="identifier">arg</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">cnv</span><span class="special">::</span><span class="identifier">parameter</span><span class="special">;</span> 38</pre> 39<p> 40 </p> 41<p> 42</p> 43<pre class="programlisting"> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">cnv</span><span class="special">::</span><span class="identifier">cstream</span> <span class="identifier">cnv</span><span class="special">;</span> 44 <span class="identifier">std</span><span class="special">::</span><span class="identifier">locale</span> <span class="identifier">rus_locale</span><span class="special">;</span> 45 <span class="identifier">std</span><span class="special">::</span><span class="identifier">locale</span> <span class="identifier">eng_locale</span><span class="special">;</span> 46 47 <span class="keyword">char</span> <span class="keyword">const</span><span class="special">*</span> <span class="identifier">eng_locale_name</span> <span class="special">=</span> <span class="identifier">test</span><span class="special">::</span><span class="identifier">cnv</span><span class="special">::</span><span class="identifier">is_msc</span> <span class="special">?</span> <span class="string">"English_United States.1251"</span> <span class="special">:</span> <span class="string">"en_US.UTF-8"</span><span class="special">;</span> 48 <span class="keyword">char</span> <span class="keyword">const</span><span class="special">*</span> <span class="identifier">rus_locale_name</span> <span class="special">=</span> <span class="identifier">test</span><span class="special">::</span><span class="identifier">cnv</span><span class="special">::</span><span class="identifier">is_msc</span> <span class="special">?</span> <span class="string">"Russian_Russia.1251"</span> <span class="special">:</span> <span class="string">"ru_RU.UTF-8"</span><span class="special">;</span> 49 <span class="keyword">char</span> <span class="keyword">const</span><span class="special">*</span> <span class="identifier">rus_expected</span> <span class="special">=</span> <span class="identifier">test</span><span class="special">::</span><span class="identifier">cnv</span><span class="special">::</span><span class="identifier">is_msc</span> <span class="special">?</span> <span class="string">"1,235e-002"</span> <span class="special">:</span> <span class="string">"1,235e-02"</span><span class="special">;</span> 50 <span class="keyword">char</span> <span class="keyword">const</span><span class="special">*</span> <span class="identifier">eng_expected</span> <span class="special">=</span> <span class="identifier">test</span><span class="special">::</span><span class="identifier">cnv</span><span class="special">::</span><span class="identifier">is_msc</span> <span class="special">?</span> <span class="string">"1.235e-002"</span> <span class="special">:</span> <span class="string">"1.235e-02"</span><span class="special">;</span> 51 <span class="keyword">char</span> <span class="keyword">const</span><span class="special">*</span> <span class="identifier">dbl_expected</span> <span class="special">=</span> <span class="identifier">test</span><span class="special">::</span><span class="identifier">cnv</span><span class="special">::</span><span class="identifier">is_msc</span> <span class="special">?</span> <span class="string">"1.2345E-002"</span> <span class="special">:</span> <span class="string">"1.2345E-02"</span><span class="special">;</span> 52 53<span class="comment">// cnv(std::setprecision(4))(std::uppercase)(std::scientific);</span> 54 <span class="identifier">cnv</span><span class="special">(</span><span class="identifier">arg</span><span class="special">::</span><span class="identifier">precision</span> <span class="special">=</span> <span class="number">4</span><span class="special">)</span> 55 <span class="special">(</span><span class="identifier">arg</span><span class="special">::</span><span class="identifier">uppercase</span> <span class="special">=</span> <span class="keyword">true</span><span class="special">)</span> 56 <span class="special">(</span><span class="identifier">arg</span><span class="special">::</span><span class="identifier">notation</span> <span class="special">=</span> <span class="identifier">cnv</span><span class="special">::</span><span class="identifier">notation</span><span class="special">::</span><span class="identifier">scientific</span><span class="special">);</span> 57 58 <span class="keyword">double</span> <span class="identifier">double_v01</span> <span class="special">=</span> <span class="identifier">convert</span><span class="special"><</span><span class="keyword">double</span><span class="special">>(</span><span class="identifier">dbl_expected</span><span class="special">,</span> <span class="identifier">cnv</span><span class="special">).</span><span class="identifier">value_or</span><span class="special">(</span><span class="number">0</span><span class="special">);</span> 59 <span class="identifier">string</span> <span class="identifier">double_s02</span> <span class="special">=</span> <span class="identifier">convert</span><span class="special"><</span><span class="identifier">string</span><span class="special">>(</span><span class="identifier">double_v01</span><span class="special">,</span> <span class="identifier">cnv</span><span class="special">).</span><span class="identifier">value_or</span><span class="special">(</span><span class="string">"bad"</span><span class="special">);</span> 60 61 <span class="identifier">BOOST_TEST</span><span class="special">(</span><span class="identifier">dbl_expected</span> <span class="special">==</span> <span class="identifier">double_s02</span><span class="special">);</span> 62 63 <span class="keyword">try</span> <span class="special">{</span> <span class="identifier">rus_locale</span> <span class="special">=</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">locale</span><span class="special">(</span><span class="identifier">rus_locale_name</span><span class="special">);</span> <span class="special">}</span> 64 <span class="keyword">catch</span> <span class="special">(...)</span> <span class="special">{</span> <span class="identifier">printf</span><span class="special">(</span><span class="string">"Bad locale %s.\n"</span><span class="special">,</span> <span class="identifier">rus_locale_name</span><span class="special">);</span> <span class="identifier">exit</span><span class="special">(</span><span class="number">1</span><span class="special">);</span> <span class="special">}</span> 65 66 <span class="keyword">try</span> <span class="special">{</span> <span class="identifier">eng_locale</span> <span class="special">=</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">locale</span><span class="special">(</span><span class="identifier">eng_locale_name</span><span class="special">);</span> <span class="special">}</span> 67 <span class="keyword">catch</span> <span class="special">(...)</span> <span class="special">{</span> <span class="identifier">printf</span><span class="special">(</span><span class="string">"Bad locale %s.\n"</span><span class="special">,</span> <span class="identifier">eng_locale_name</span><span class="special">);</span> <span class="identifier">exit</span><span class="special">(</span><span class="number">1</span><span class="special">);</span> <span class="special">}</span> 68 69<span class="comment">// cnv(std::setprecision(3))(std::nouppercase);</span> 70 <span class="identifier">cnv</span><span class="special">(</span><span class="identifier">arg</span><span class="special">::</span><span class="identifier">precision</span> <span class="special">=</span> <span class="number">3</span><span class="special">)(</span><span class="identifier">arg</span><span class="special">::</span><span class="identifier">uppercase</span> <span class="special">=</span> <span class="keyword">false</span><span class="special">);</span> 71 72 <span class="identifier">string</span> <span class="identifier">double_rus</span> <span class="special">=</span> <span class="identifier">convert</span><span class="special"><</span><span class="identifier">string</span><span class="special">>(</span><span class="identifier">double_v01</span><span class="special">,</span> <span class="identifier">cnv</span><span class="special">(</span><span class="identifier">rus_locale</span><span class="special">)).</span><span class="identifier">value_or</span><span class="special">(</span><span class="string">"bad double_rus"</span><span class="special">);</span> 73 <span class="identifier">string</span> <span class="identifier">double_eng</span> <span class="special">=</span> <span class="identifier">convert</span><span class="special"><</span><span class="identifier">string</span><span class="special">>(</span><span class="identifier">double_v01</span><span class="special">,</span> <span class="identifier">cnv</span><span class="special">(</span><span class="identifier">eng_locale</span><span class="special">)).</span><span class="identifier">value_or</span><span class="special">(</span><span class="string">"bad double_eng"</span><span class="special">);</span> 74 75 <span class="identifier">BOOST_TEST</span><span class="special">(</span><span class="identifier">double_rus</span> <span class="special">==</span> <span class="identifier">rus_expected</span><span class="special">);</span> 76 <span class="identifier">BOOST_TEST</span><span class="special">(</span><span class="identifier">double_eng</span> <span class="special">==</span> <span class="identifier">eng_expected</span><span class="special">);</span> 77</pre> 78<p> 79 </p> 80</div> 81<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 82<td align="left"></td> 83<td align="right"><div class="copyright-footer">Copyright © 2009-2016 Vladimir Batov<p> 84 Distributed under the Boost Software License, Version 1.0. See copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>. 85 </p> 86</div></td> 87</tr></table> 88<hr> 89<div class="spirit-nav"> 90<a accesskey="p" href="../stream_converter.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../stream_converter.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="supported_string_types.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 91</div> 92</body> 93</html> 94
