I've been using Boost Multiindex quite a lot but don't understand why the
code below inserts two items. The container has a unique hash index and
the two items return the same hash value. Is this is a bug in the library
or in my code?
Boris
--
struct foo
{
int i, j;
foo(int i, int j) : i(i), j(j) { }
};
std::size_t hash_value(const shared_ptr<foo> &f)
{
std::size_t seed = 0;
boost::hash_combine(seed, f->i);
boost::hash_combine(seed, f->j);
return seed;
}
typedef multi_index_container<
shared_ptr<foo>,
indexed_by
mi_t;
shared_ptr<foo> f1(new foo(0, 0)); shared_ptr<foo> f2(new foo(0, 0)); mi_t mi; cout << mi.insert(f1).second << endl; // Returns 1. cout << mi.insert(f2).second << endl; // Returns again 1?! cout << mi.size() << endl; // Returns 2?!