Re: [boost] hash_combine vs hash_value

Subject: Re: [boost] hash_combine vs hash_value
From: Daniel James (dnljms_at_[hidden])
Date: 2011-03-25 10:49:23

On 25 March 2011 13:57, Michael Goldshteyn <mgoldshteyn_at_[hidden]> wrote:
> After reading the explanation of how hash_combine should be used, I am left
> wondering. Why is the recommendation for hash_combine different from what
> one would intuitively expect?

If you call hash_value directly you won't be taking advantage of the
mechanism for finding the correct overload. Obviously, in this case
that isn't a big deal but we'd rather encourage an implementation
style that always works. There are also some portability workarounds
that you'll be missing.

Daniel