And don't try to specialize hash on unconstrained std::pair; it isn't
yours. Write a separate hash class to use explicitly if you must.

On Mon, Oct 2, 2023, 12:27 Giuseppe D'Angelo via Std-Discussion <
std-discussion_at_[hidden]> wrote:

> On 02/10/2023 19:45, Aaron Gray via Std-Discussion wrote:
> > size_t hash = 0;
> > hash ^= key.first ? std::hash<string>()(
> key.first->name ) :
> > std::hash<void *>()( nullptr );
> > hash ^= key.second ? std::hash<string>()(
> key.second->name ) :
> > std::hash<void *>()( nullptr );
> > return hash;
>
> Please don't do this; Use Boost.HashCombine or one of the techniques
> described by the newer hashing proposals.
>
> My 2 c,
> --
> Giuseppe D'Angelo
>
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