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

Subject: Re: [Boost-users] [uuid] to string problem
From: John Dlugosz (JDlugosz_at_[hidden])
Date: 2010-05-12 14:29:18

> 
> Argument-dependent look-up, but I'm sure that's not on dictionary.com
> :)

I'll add it to Wiktionary, but can't remember my password.

> 
> No, the important semantic difference is that lexical_cast<string> can
> not use ADL. However, it could be a good idea to write a generic
> lexical_cast<string> that resolves to a unqualified call to to_string.

Ah, to make the explicit specialization you would have to close the normal namespaces and open up the namespace for its primary template.

But wait!  It's not a specialization, it's an overloading.  The template argument is for the result type.  The parameter is overloaded in the normal way, and subject to normal resolution.

to_string (const C& x)
to_wstring (const C& x)
to_xstring (const C& x)
to_MFC_CString (const C& x)
... etc? 

to_string<std::wstring>(x);
specifies the return type (which can default to std::string) and is defined in the same namespace as C.

If you called it lexical_cast instead, are you saying that would not play nicely with the existing lexical_cast definitions?

--John





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