20 May
2008
20 May
'08
4:41 p.m.
Hello,
Actually, a rationale could be provided for pow<0>(0) == 1. But it should be explained in the documentation. Alternatively, you could use a policy class, I suppose. Either way, pow<0> should probably be handled as a special case, not in positive_power.
As returning 1 makes sense in most cases, I'd be inclined to simply state this behavior in the doc. We can use policies, but in this case I vote for having 2 different policies for negatives powers of 0 and 0^0, with throw_on_error as a default for the first one and ignore_error (namely: return 1) for the second one. Bruno