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

Subject: Re: [Boost-users] [uuid] to string problem
From: John Dlugosz (JDlugosz_at_[hidden])
Date: 2010-05-11 14:54:51

> > or standalone function? AFAIK lexical_cast has a lot of overhead :(
> 
> 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 <typename C, typename T, typename A>
> std::basic_string<C, T, A> 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);
> 


How about making explicit specializations of lexical_cast that would be faster than the general implementation?  That way the optimization is invisible.

Also validate your assumptions that it is slow!  I saw some code to format a number that ran it through iostreams, and thought why not use the standard ltoa (or whatever it was)?  Turns out that the iostream way was much faster!  It inlined everything and simplified the result.

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