Hello! Thank you for this incredible initiative!

I'm trying to run awesome python-powered xonsh shell using RustPython.
I removed all import ctype because it is not implemented yet (#1217).
But after this I'm facing with this error:

   ...
  File "/Users/usr/.local/lib/rustpython3.11/site-packages/xonsh/execer.py", line 9, in <module>
    from xonsh.parser import Parser
SyntaxError: match expression is not implemented yet at line 1 column 1
"""Implements the xonsh parser."""
^

What is "match expression" in this case?
Any plans to implement this?
Many thanks!