Re: [boost] [challenge!] find a common domain

Subject: Re: [boost] [challenge!] find a common domain
From: Jeremiah Willcock (jewillco_at_[hidden])
Date: 2010-05-19 14:52:51

On Tue, 18 May 2010, Eric Niebler wrote:

(snip)

> Your job: implement the deduce_domain3 template that finds the common
> domain of 3 domains. You're allowed to use decltype, but you get bonus
> points for a solution that doesn't. Bonus also for instantiating fewest
> templates. The challenge is for the ternary case, but your solution
> should scale to N domains. If your solution is better than mine, I'll
> use it in Proto and credit you!

My solution attempt is attached.  It should be standard C++03 (no 
decltype).  The ternary case is just built as a pair of applications of a 
binary deduce_domain2 template, so adding more parameters should be 
straightforward.

-- Jeremiah Willcock