Re: [Boost-users] Meaning of or_<> with empty arguments

Reetesh Mukul a écrit :

;) This I know. I meant something very different.

Ok, but you could agree you didn't ask about the semantic :D

I wanted to ask what can be the meaning of "or" operation on an empty list/vector of parameters. Here or_<> is provided an empty set of parameters.

In fact, I don't understand too. It is maybe a limitation due to the use of macro for emulating variadic templates ?

Now if suppose or_<> to false, how one is going to evaluate

I made tests too. And op_<>::operator bool() doesn't exist if we don't indicate at least one template argument. So I can't help you anymore. -- Mickaël Wolff aka Lupus Michaelis Racine http://lupusmic.org Blog http://blog.lupusmic.org