And a no-op won't work, but something almost as simple - looping through the input range and assigning an incremental counter - should:
On Apr 10, 2013, at 1:44 PM, "Kirk, Benjamin (JSC-EG311)" <email@example.com> wrote:
> On Apr 10, 2013, at 1:42 PM, Derek Gaston <firstname.lastname@example.org> wrote:
>> OOoooooh! Really? That sounds perfect! I'll try it!
> Please try my barrier() first though, referring to the email that just crossed this one…
for (ForwardIterator::it=begin, it!=end; ++it)
would be the "right" way to turn this into a no-op…