Mark Mann

Could this instead be written as using the existing `adapt_stream` algorithm but passing the identity function for the [`adapt_next` param](https://github.com/facebookexperimental/libunifex/blob/2547d87fb98a1fe70eccc170a8c91b144648517d/include/unifex/adapt_stream.hpp#L89)? That would make this algorithm more maintainable in the long...

If the function is just an identity transformation then it shouldn't take up any additional space in the `adapt_stream` type (so long as the functions are annotated with `[[no_unique_address]]`). Check...