Subject: Re: [boost] [any] new version
From: Ilya Bobir (ilya.bobir_at_[hidden])
Date: 2011-08-31 20:55:11
On Wed, Aug 31, 2011 at 5:16 PM, Martin Bidlingmaier
<Martin.Bidlingmaier_at_[hidden]> 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