Re: [boost] [variant] Warning: variadic templates in boost::variant

Subject: Re: [boost] [variant] Warning: variadic templates in boost::variant
From: Peter Dimov (lists_at_[hidden])
Date: 2013-12-09 07:02:12

Antony Polukhin вроте:
> However this:
> * breaks ABI (now variant is declared as `template <typename T0, 
> typename... TN> class variant`)

Why not just template<class... TN> class variant? It's true that the 
degenerate case of variant<> isn't particularly useful, but then again, 
neither is the singular case of variant<X>. Is there a good reason to 
prohibit variant<>?