On 02/05/2016 10:49, Tassilo Glander wrote:

Hi John, I opened tickets to track both issues: - Ticket #12170 (new Bugs) boost::multiprecision::export_bits throws on a negative cpp_int number - Ticket #12171 (new Feature Requests) boost::multiprecision should provide a hash function

Thanks, I see them, I also fixed those issues in develop yesterday ;) I also added some minimal docs, including an example of a custom hash function with Google's CityHash, preview here: https://htmlpreview.github.io/?https://github.com/boostorg/multiprecision/bl... HTH, John.