Re: Re: Re: Re: boost.function with CW 8.2 on W2k

From: Bertolt Mildner (Bertolt.Mildner_at_[hidden])
Date: 2002-09-10 10:35:07

"Douglas Gregor" <gregod_at_[hidden]> schrieb im Newsbeitrag news:200209101109.28788.gregod_at_cs.rpi.edu...
> On Tuesday 10 September 2002 10:56 am, Bertolt Mildner wrote:

[...]
>   struct dummy {
>     template<typename T> void nonnull() {};
>   };
> 
>   typedef void (dummy::*safe_bool)();
> 
>   operator safe_bool () const 
>     { return (this->empty())? 0 : &dummy::nonnull<int>; }
> 
>   safe_bool operator!() const 
>     { return (!this->empty())? 0 : &dummy::nonnull<int>; }
> 
> If it works, I'll put the workaround into CVS.

Now I get:

Error   : ambiguous access to overloaded function 
(included from:
 function.hpp:22
 KeyStorage.h:12
 HostMemoryKeyStorage.h:9
 DesKey.h:10
 MWPrefixWin32.pch++:14)
function_base.hpp line 298         { return (!this->empty())? 0 : &dummy::nonnull<int>; }

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