On Wed, Aug 31, 2011 at 5:16 PM, Martin Bidlingmaier <Martin.Bidlingmaier@gmx.de> wrote:
Hi,
[...] It does not depend on rtti and uses a static integer value instead of std::type_info to store type information. [...]
Quote from any.hpp: //use static class member to force initialization at program start to make type_id thread safe (and more efficient) template< class T > class type_id { public: static unsigned int value; }; template< class T > unsigned int type_id< T >::value = next_id(); I do not think you can initialize a class static in a header. If you include any.hpp in more than one cpp you will have the same static been initialized more than once. MS C++ linker complains. Though the standard requires no diagnostic. See "9.4.2 Static data members" paragraph 5. Ilya Bobyr