Hi, everyone! I've been contributing upgrades to Boost.Parameter functionality and documentation in the GitHub develop branch for the past couple of months. These upgrades include the addition of code generation macros for Boost.Parameter-enabled function call operators and support for perfect forwarding, and more upgrades are yet to come. It's been an enjoyable experience so far, but understandably there are some growing pains. I've taken pains to ensure that as long as user libraries access only the public interface of Boost.Parameter, they won't be affected by the changes. However, there are several notable libraries that currently use non-public portions of Boost.Parameter, so whenever possible I've submitted PRs to those libraries that either change the usage to access only public portions (preferred) or make quick fixes (temporary). I'm drawing off Peter Dimov's page < https://pdimov.github.io/boostdep-report/develop/parameter.html> as a guide to focus my efforts. As of this writing, I have active PRs for the following libraries: Boost.Convert Boost.Graph Boost.Lockfree I also have my eye on the following libraries, which I know have been broken by the latest changes: Boost.Accumulators Boost.Log I'm willing to help the library maintainers resolve these issues as quickly as possible. This post can serve as a discussion starting point, and I should be able to answer any questions you have about the changes to Boost.Parameter. Cromwell D. Enage