[boost] Re: [multi_index] composite keys: request for advice

From: Dave Gomboc (dave_at_[hidden])
Date: 2004-04-24 22:05:48

[reformatted]
> // yields true
> composite_key</* as before*> ck; ck(record(1,2,3))<=make_tuple(1,2);
> 
> // yields true
> make_tuple(1,2)<=ck(record(1,2,3));
> 
> So far, this is all IMHO perfectly consistent,
> but the following design decision is not 
> obvious to me: given the previous, what should
> be the result of
> 
> ck(record(1,2,3))==make_tuple(1,2); // true or false?
> 
> As these two objects are neither greater than the
> other, at least they are *equivalent*, but maybe
> allowing operator== to return true is too much.

operator== should return false here.  The operands are equivalent, but
not equal.

Dave