[boost] Re: any_cast improvement

From: Unai Uribarri Rodríguez (unaiur_at_[hidden])
Date: 2003-01-17 13:17:51

Alexander Nasonov wrote:
> Unai Uribarri Rodríguez wrote:
> 
> 
>>Alexander Nasonov wrote:
>>
>>>Unai Uribarri Rodríguez wrote:
>>>
>>>
>>>>any_cast, as is implemented in boost 1.29, has one weakness; it doesn't
>>>>allow to compile this piece of code:
>>>>
>>>>  any x=int(5);
>>>>  ++any_cast<int&>(x)
>>>
>>>Boost.dynamic_any has extract functinos which work this way.
>>
>>But this patch adds that functionality without breaking the interface.
> 
> 
> For broken compilers it could break all because remove_reference might not 
> work for them.
> 

If you see the compiler status page, you can see that the any test and 
the remove_reference works with the all compilers except Visual C++ 6 & 
7 and SGI MIPSpro CC 7.3.1.2m. The any_test fails also with Sun Workshop 
6U2.

Therefore, this patch doesn't affect the portability of any.