templatizable

They are equally templatizable and inlinable.

One can also split the problem into pieces, which gets kind of ugly in C, but might be templatizable in C++: […]

Next, TTBOMK you need to do your classes in header files if you are going to make them into generic templates...well, putting them into headers isn't strictly a requirement but the other restrictions for (templatizable code) would encourage only using headers.