boost::hash_combine — Called repeatedly to incrementally create a hash value from several variables.
template<typename T> void hash_combine(size_t & seed, T const& v);
seed ^= hash_value(v) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
hash_value is called without qualification, so that overloads can be found via ADL.
This is an extension to TR1
|Throws:||Only throws if hash_value(T) throws. Strong exception safety, as long as hash_value(T) also has strong exception safety.|
|Copyright © 2005, 2006 Daniel James|