[boost] Re: Better Intel-Win32 support

From: Daryle Walker (dwalker07_at_[hidden])
Date: 2003-06-05 01:10:59

On Wednesday, June 4, 2003, at 3:54 PM, Beman Dawes wrote:

> Hum... I just had a thought. Is it possible to detect if wchar_t is a 
> typedef at compile time?
>
> Yes, I think so. Won't boost::is_same< unsigned short, wchar_t 
> >::value be true if wchar_t is a typedef, and false if a distinct > type?
>
> I'll do some experiments.

The method you gave may not work.  Who says that "unsigned short" is 
the type that "wchar_t" rips off?  What about something like:

// If wchar_t is a distinct type, this version will be used
template < typename T >
struct my_tester
{
     BOOST_STATIC_CONSTANT( bool, value = false );
};

// Do this specialization for every built-in integral type
// EXCEPT wchar_t
template <  >
struct my_tester< bool >
{
     BOOST_STATIC_CONSTANT( bool, value = true );
};

//...

int main()
{
     return my_tester<wchar_t>::value;
}

Daryle