private become protected so ease overriding

[franckOL]

No description provided.

[gyssels]

@franckOL I will accept PR on gyssels/Arduino-CmdMessenger, and I messaging the other PR submitters so it can become an active branch
I engage myself to do a full PR back here if in the future I'll not maintain this anymore.

[franckOL]

@franckOL I will accept PR on gyssels/Arduino-CmdMessenger, and I messaging the other PR submitters so it can become an active branch I engage myself to do a full PR back here if in the future I'll not maintain this anymore.

Do you mean that I must do a PR to your fork https://github.com/gyssels/Arduino-CmdMessenger ?

I have some enhancements that I can propose later.

[thijse]

Thank you for the contribution. After review we are not taking this change for a few reasons:

1. Changing the access specifier from private to protected is a design decision we want to keep — the internal state (buffers, parsing cursor, callback list) is intentionally not part of the public API contract.
2. The Mbed platform abstraction (conditional typedefs for Stream and byte) adds significant complexity and conditional compilation paths that are hard to test and maintain.
3. The byte/Stream typedef changes are a breaking API change that would affect all existing user code.

If you have a specific use case that requires subclassing we are open to discussing a narrower targeted change. Thank you for the effort.