Re: [Boost-users] Regression in Boost.Variant with gcc6.3 in C++03 mode

On 28 Jun 2017, at 01:30, d25fe0be--- via Boost-users wrote:

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On 28 Jun 2017, at 01:27, d25fe0be@outlook.com wrote:

And I believe this finding gives us an easier workaround: Just defining our own `BOOST_IS_CONVERTIBLE` before including `boost/variant.hpp`, and the compilation error should disappear.

``` #include #define BOOST_IS_CONVERTIBLE(T,U) std::is_convertible::value

#include [...] ```

Oh sorry I forgot you're using C++03.

Maybe you could write your own `is_convertible` in C++03 and redirect boost's to there.

Sorry I missed John's reply.. I believe John is right, without C++11 a fully conforming is_convertible seems not to be implementable (I didn't find a way to remove `_m_check` taking the inaccessible base as a parameter from the overload set.), hence 'your own `is_convertible`' seems not to be feasible either. Thank you John for pointing this out, and sorry for the noise.