Do codeclap already support or is planning to add support for other languages like Rust?
In general, as it is for most native debuggers, codeclap doesn't really care that much about the language that was used.
The important part is that the compiler outputs native x64 code and debug information in a compatible format (which is dwarf for Linux/macOS and either pdb/codeview or dwarf on Windows). Also the calling conventions has to be compatible for function calls to work in the expressions panel.
However in some cases high level languages may not be that comfortable to debug without support for specific structures or name mangling.
Since I always like to explore new possible test cases I will check out a few rust example over the week(end) and will report what I find.