[goodcanadian]

I've run into cases where templates pay off once or twice. I was once able to refactor 1000+ lines of code into about 150 lines using a template class. However, I've tried more than once to learn "advanced" meta-programming techniques, and I've yet to find a use case that makes any sense.

[bcatanzaro]

I wrote a library a few years back to do in-place non-square transposition in the GPU register file. The algorithm had a lot of math that needed to be computed for every size matrix. I wrote it in C++03, before any constexpr, so the metaprogramming is intense. One of these days I'll rewrite it in C++20 and most of the code will go away. This code is still in use by the way.

https://github.com/bryancatanzaro/trove