Re: [Boost-users] [uuid] to string problem

12 May 2010

      To turn back to my problem =) , Here's my method:

string GeneratorUtils::getRandomID(){

    random_generator gen;
    uuid u = gen();

    //string str = boost::lexical_cast<string>(u);
    string str = boost::lexical_cast(u);

    return str;
}

And here's my test code:

int main(){
    cout << "SAYGIN" << endl;

    GeneratorUtils gen;
    cout << gen.getRandomID() << endl;

    return 0;
}

And here's the output:
$ ~/DAIM_MPI_Correlation/utils$ g++ -c GeneratorUtils.cpp
$ g++ -o test GeneratorUtils.cpp
$ ./test
SAYGIN
terminate called after throwing an instance of
'boost::exception_detail::clone_implboost::bad_lexical_cast
...
'
  what():  bad lexical cast: source type value could not be interpreted as
target
Aborted
Do you have any idea?

On Wed, May 12, 2010 at 4:05 PM, Thorsten Ottosen  wrote:
...
Emil Dotchevski skrev:
On Tue, May 11, 2010 at 6:00 AM, Andy Tompkins 
...
wrote:
...
Hmm, I haven't really given it much thought.  Since it doesn't need to
be a member function, I would lean toward a standalone function.  Do
any other libraries have a similar function?  I would likely create:
template 
std::basic_string to_basic_string(boost::uuids::uuid const& u);
as well as,
std::string to_string(boost::uuids::uuid const& u);
std::wstring to_wstring(boost::uuids::uuid conts& u);
+1, unqualified call to to_string is how Boost Exception converts to
string arbitrary objects stored in exception objects. If you use this
form and someone adds a UUID to a boost::exception, it'll appear
correctly in the output from boost::diagnostic_information.
-1
a to_string() member is IMO much preferred for simplicity and the
encapsulation perspective. Just like std::bitset<N>::to_string().
There seem to be no standard in Boost for this :-(, e.g. filesystem uses
::string(), format uses ::str().
-Thorsten
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H. Saygin Arkan
Tampere University of Tech.
CS / III - +358466646156