[boost] Re: any_cast improvement

[Unai Uribarri Rodríguez]

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.


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