[boost] [functional/hash] integer hash function

Subject: [boost] [functional/hash] integer hash function
From: Tim Blechmann (tim_at_[hidden])
Date: 2011-10-04 16:03:09

i was quite amazed that the default hash function for integers seems to be the 
identity function:

from boost/functional/hash/hash.hpp:
    inline std::size_t hash_value(int v)
    {
        return static_cast<std::size_t>(v);
    }

while this is probably the most efficient hash function, it is also the worst 
possible. is this done intentionally?

tim