Re: [boost] [proto] design of expr<>

Larry Evans wrote:

On 03/20/08 18:10, Eric Niebler wrote:

...

Tags don't have arities, expressions do. The arity of tag::function could be anything. The arity represents the number of children of an expression node. So the arity is a very real part of an expression.

So:

expr<tag::shift_right, Args, 20>

is a valid expression?

If Args has 20 elements in it, sure. -- Eric Niebler Boost Consulting www.boost-consulting.com