I&#39;ve done exactly the same thing, using lexical. Here&#39;s my method:<br>
<br>string GeneratorUtils::getRandomID(){<br><br>    random_generator gen;<br>    uuid u = gen();<br><br>    string str = boost::lexical_cast&lt;std::string&gt;(u);<br><br>    return 0;<br>}<br>
<br>And I&#39;ve received the errors belove.<br>I have 2 ideas about the problem:<br>1 - did I do something wrong while installing boost?<br>2 - did I do something wrong while compiling? I&#39;ve just written g++ -c GeneratorClasses.h GeneratorClasses.cpp and after this command here&#39;s the output:<br>

<br>
/usr/local/include/boost/lexical_cast.hpp: In member function ‘bool
boost::detail::lexical_stream&lt;Target, Source,
Traits&gt;::operator&lt;&lt;(const Source&amp;) [with Target =
std::basic_string&lt;char, std::char_traits&lt;char&gt;,
std::allocator&lt;char&gt; &gt;, Source = boost::uuids::uuid, Traits =
std::char_traits&lt;char&gt;]’:<br>
/usr/local/include/boost/lexical_cast.hpp:1151:   instantiated from
‘Target boost::detail::lexical_cast(typename
boost::call_traits&lt;Source&gt;::param_type, CharT*, size_t) [with
Target = std::basic_string&lt;char, std::char_traits&lt;char&gt;,
std::allocator&lt;char&gt; &gt;, Source = boost::uuids::uuid, bool
Unlimited = true, CharT = boost::lexical_cast::char_type]’<br>
/usr/local/include/boost/lexical_cast.hpp:1174:   instantiated from
‘Target boost::lexical_cast(const Source&amp;) [with Target =
std::basic_string&lt;char, std::char_traits&lt;char&gt;,
std::allocator&lt;char&gt; &gt;, Source = boost::uuids::uuid]’<br>
GeneratorClasses.cpp:93:   instantiated from here<br>
/usr/local/include/boost/lexical_cast.hpp:595: error: no match for
‘operator&lt;&lt;’ in
‘((boost::detail::lexical_stream&lt;std::basic_string&lt;char,
std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt;,
boost::uuids::uuid, std::char_traits&lt;char&gt;
&gt;*)this)-&gt;boost::detail::lexical_stream&lt;std::basic_string&lt;char,
std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt;,
boost::uuids::uuid, std::char_traits&lt;char&gt; &gt;::stream &lt;&lt;
input’<br>
/usr/include/c++/4.4/ostream:108: note: candidates are:
std::basic_ostream&lt;_CharT, _Traits&gt;&amp;
std::basic_ostream&lt;_CharT,
_Traits&gt;::operator&lt;&lt;(std::basic_ostream&lt;_CharT,
_Traits&gt;&amp; (*)(std::basic_ostream&lt;_CharT, _Traits&gt;&amp;))
[with _CharT = char, _Traits = std::char_traits&lt;char&gt;]<br>
/usr/include/c++/4.4/ostream:117: note:                
std::basic_ostream&lt;_CharT, _Traits&gt;&amp;
std::basic_ostream&lt;_CharT,
_Traits&gt;::operator&lt;&lt;(std::basic_ios&lt;_CharT,
_Traits&gt;&amp; (*)(std::basic_ios&lt;_CharT, _Traits&gt;&amp;)) [with
_CharT = char, _Traits = std::char_traits&lt;char&gt;]<br>
/usr/include/c++/4.4/ostream:127: note:                
std::basic_ostream&lt;_CharT, _Traits&gt;&amp;
std::basic_ostream&lt;_CharT,
_Traits&gt;::operator&lt;&lt;(std::ios_base&amp;
(*)(std::ios_base&amp;)) [with _CharT = char, _Traits =
std::char_traits&lt;char&gt;]<br>
/usr/include/c++/4.4/ostream:165: note:                
std::basic_ostream&lt;_CharT, _Traits&gt;&amp;
std::basic_ostream&lt;_CharT, _Traits&gt;::operator&lt;&lt;(long int)
[with _CharT = char, _Traits = std::char_traits&lt;char&gt;]<br>
/usr/include/c++/4.4/ostream:169: note:                
std::basic_ostream&lt;_CharT, _Traits&gt;&amp;
std::basic_ostream&lt;_CharT, _Traits&gt;::operator&lt;&lt;(long
unsigned int) [with _CharT = char, _Traits =
std::char_traits&lt;char&gt;]<br>
/usr/include/c++/4.4/ostream:173: note:                
std::basic_ostream&lt;_CharT, _Traits&gt;&amp;
std::basic_ostream&lt;_CharT, _Traits&gt;::operator&lt;&lt;(bool) [with
_CharT = char, _Traits = std::char_traits&lt;char&gt;]<br>
/usr/include/c++/4.4/bits/ostream.tcc:91: note:                
std::basic_ostream&lt;_CharT, _Traits&gt;&amp;
std::basic_ostream&lt;_CharT, _Traits&gt;::operator&lt;&lt;(short int)
[with _CharT = char, _Traits = std::char_traits&lt;char&gt;]<br>
/usr/include/c++/4.4/ostream:180: note:                
std::basic_ostream&lt;_CharT, _Traits&gt;&amp;
std::basic_ostream&lt;_CharT, _Traits&gt;::operator&lt;&lt;(short
unsigned int) [with _CharT = char, _Traits =
std::char_traits&lt;char&gt;]<br>
/usr/include/c++/4.4/bits/ostream.tcc:105: note:                
std::basic_ostream&lt;_CharT, _Traits&gt;&amp;
std::basic_ostream&lt;_CharT, _Traits&gt;::operator&lt;&lt;(int) [with
_CharT = char, _Traits = std::char_traits&lt;char&gt;]<br>
/usr/include/c++/4.4/ostream:191: note:                
std::basic_ostream&lt;_CharT, _Traits&gt;&amp;
std::basic_ostream&lt;_CharT, _Traits&gt;::operator&lt;&lt;(unsigned
int) [with _CharT = char, _Traits = std::char_traits&lt;char&gt;]<br>
/usr/include/c++/4.4/ostream:200: note:                
std::basic_ostream&lt;_CharT, _Traits&gt;&amp;
std::basic_ostream&lt;_CharT, _Traits&gt;::operator&lt;&lt;(long long
int) [with _CharT = char, _Traits = std::char_traits&lt;char&gt;]<br>
/usr/include/c++/4.4/ostream:204: note:                
std::basic_ostream&lt;_CharT, _Traits&gt;&amp;
std::basic_ostream&lt;_CharT, _Traits&gt;::operator&lt;&lt;(long long
unsigned int) [with _CharT = char, _Traits =
std::char_traits&lt;char&gt;]<br>
/usr/include/c++/4.4/ostream:209: note:                
std::basic_ostream&lt;_CharT, _Traits&gt;&amp;
std::basic_ostream&lt;_CharT, _Traits&gt;::operator&lt;&lt;(double)
[with _CharT = char, _Traits = std::char_traits&lt;char&gt;]<br>
/usr/include/c++/4.4/ostream:213: note:                
std::basic_ostream&lt;_CharT, _Traits&gt;&amp;
std::basic_ostream&lt;_CharT, _Traits&gt;::operator&lt;&lt;(float)
[with _CharT = char, _Traits = std::char_traits&lt;char&gt;]<br>
/usr/include/c++/4.4/ostream:221: note:                
std::basic_ostream&lt;_CharT, _Traits&gt;&amp;
std::basic_ostream&lt;_CharT, _Traits&gt;::operator&lt;&lt;(long
double) [with _CharT = char, _Traits = std::char_traits&lt;char&gt;]<br>
/usr/include/c++/4.4/ostream:225: note:                
std::basic_ostream&lt;_CharT, _Traits&gt;&amp;
std::basic_ostream&lt;_CharT, _Traits&gt;::operator&lt;&lt;(const
void*) [with _CharT = char, _Traits = std::char_traits&lt;char&gt;]<br>
/usr/include/c++/4.4/bits/ostream.tcc:119: note:                
std::basic_ostream&lt;_CharT, _Traits&gt;&amp;
std::basic_ostream&lt;_CharT,
_Traits&gt;::operator&lt;&lt;(std::basic_streambuf&lt;_CharT,
_Traits&gt;*) [with _CharT = char, _Traits =
std::char_traits&lt;char&gt;]<br><br><div class="gmail_quote">On Mon, May 10, 2010 at 11:04 PM, Andy Tompkins <span dir="ltr">&lt;<a href="mailto:atompkins@fastmail.fm">atompkins@fastmail.fm</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">

<div><div style="font-family: Arial; font-size: medium;" dir="ltr"><div>
<div><div><div></div><div class="h5">
<div>On Mon, 10 May 2010 14:26 +0300, &quot;Saygin Arkan&quot; &lt;<a href="mailto:saygenius@gmail.com" target="_blank">saygenius@gmail.com</a>&gt; wrote:</div>
<blockquote type="cite">Hi,<br>
I&#39;m a newbie on boost.<br>
I&#39;ve downloaded and used some features.<br>
<br>
I couldn&#39;t find how to cast uuid into string.<br>
<br>
#include &quot;boost/date_time/gregorian/gregorian.hpp&quot;<br>
#include &lt;boost/uuid/uuid.hpp&gt;<br>
#include &lt;boost/uuid/uuid_generators.hpp&gt;<br>
#include &lt;boost/uuid/random_generator.hpp&gt;<br>
#include &lt;boost/uuid/string_generator.hpp&gt;<br>
<br>
...<br>
<br>
date GeneratorUtils::getRandomDate() {<br>
    int year, month ,day;<br>
    day = rand() % 30;<br>
    month = rand() % 12;<br>
    year = 1980 + rand() % 25;<br>
    string str_date = &quot;&quot; + day + month + year ;<br>
    date d(from_simple_string(str_date));<br>
<br>
    return d;<br>
<br>
string GeneratorUtils::getRandomID(){<br>
<br>
    random_generator gen;<br>
    uuid u = gen();<br>
<br>
    return  u.uuid_to_string(); // ERROR<br>
}<br>
<br clear="all">
<br>
It does not accept any to_string() function. Is there a way to convert from uuid to string in C++?<br>
(by the way, I can use the other things such as date d, uuid u etc.)<br>
</blockquote>
<div> </div>
</div></div><div>
<div>see <a href="http://www.boost.org/doc/libs/1_43_0/libs/uuid/uuid.html#boost/uuid/uuid_io.hpp" target="_blank">http://www.boost.org/doc/libs/1_43_0/libs/uuid/uuid.html#boost/uuid/uuid_io.hpp</a></div>
<div>one can also use lexical_cast eg:</div>
<div> </div>
<div>uuid u;</div>
<div>string s = lexical_cast&lt;string&gt;(u);</div>
<div> </div>
<div>I&#39;ll update the documentation to include this example.</div>
<div> </div>
<div>Regards,</div>
<div>Andy.</div>
</div>
</div>
</div></div></div><br>_______________________________________________<br>
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<a href="http://lists.boost.org/mailman/listinfo.cgi/boost-users" target="_blank">http://lists.boost.org/mailman/listinfo.cgi/boost-users</a><br></blockquote></div><br><br clear="all"><br>-- <br>Saygin<br>