Feature Request for using new version in old project

[sweihub]

Hi Dear Author

Thanks for your great contributions, and it evolves so quickly.

I have an old project which used glaze with GLZ_META macro, since the new glaze is not compatible for the old version, and I would not change any stable code, how can I use the latest stable glaze in the old project with old glaze version?

I try to rename the glz namespace, howerver, there's still a lot of code in the root namespace which conflicts with old glaze.

[stephenberry]

I wouldn't recommend renaming the namespace and trying to use two versions at once. However, the GLZ_META macro was just a helper to write glz::meta specializations, so you should be able to copy the header file that has the GLZ_META macro code and put it into your own codebase. I don't think it would require edits to be compatible with the current version of Glaze. It was primarily removed so that users wouldn't rely on it as we move towards C++20 modules, and it doesn't save much code now that Glaze automatically reflects member variable pointers in the meta.

If you run into other upgrading issues, be sure to bring them up.

[sweihub]

I would not request for renaming the official code base, I'm suggesting if you can move some other code in root namespace into glz too. By doing this, I can simply using Linux command to replace the glz namespace with one-liner command.

For example, the following code is not in the glz namespace.
https://github.com/stephenberry/glaze/blob/main/include/glaze/api/xxh64.hpp

One more thing:
C++ module is far more mature, I tested with latest gcc and clang, the compiler crashed here and crashed there ...