I'm trying to use boost::multi_index_container on a type that I've
defined. I want the container to have two indices:
1. insertion order
2. hashed_unique
Further, I want the hash to use an sha1 hash value, which I have
represented as a struct. So, I have something like the following:
struct sha1_hash_value { ... };
class MyRecord {
public:
...
sha1_hash_value hash() const { return _sha1_hash; }
...
private:
sha1_hash_value _sha1_hash;
};
using namespace boost::multi_index;
typedef boost::multi_index_container<
MyRecord,
indexed_by<
sequenced<>,
hashed_unique
RecordSet;
When I compile this, I get lots of complaints regarding the conversions to/from the 'sha1_hash_value' type. I understand that I need to define appropriate member functions or specializations for this type. What I would like to know is what those member functions/specializations are and where that is documented so that I don't have to decipher compiler error gibberish iteratively and just cross my fingers that the errors are really about missing functionality and not about misuse. FWIW, if I change sha1_hash_value to a 'long', the code compiles, so it doesn't appear as if I'm completely misusing multi_index_container<>, though I'm certainly still open to that possibility as well. Thanks for any help. The brick wall I'm banging my head against is really starting to hurt.