Support boost::array

[Olaf van der Spek <olafvdspek@…>]

boost::hash_value appears to lack support for boost::array. Could you add it?

Isn't it possible to support all containers in a generic way?

[Daniel James]

It isn't possible to do it generically, because equality isn't always defined the same for all containers.

Support needs to be added to array itself, which is pretty easy, it just needs to include <boost/functional/hash_fwd.hpp> and then add something like the following to the same namespace as array (so that it will be picked up by ADL):

template<....>
std::size_t hash_value(array<....> const& x) {
    return boost::hash_range(x.begin(), x.end());
}

[Marshall Clow]

(In [77976]) Added support for Boost.Hash to Boost.Array; fixes #6791

[Olaf van der Spek <olafvdspek@…>]

It isn't possible to do it generically, because equality isn't always defined the same for all containers.

Does that matter? Can't you just do "return boost::hash_range(x.begin(), x.end());"?

Support needs to be added to array itself,

What about std::array?