Auxiliary function for expanding the · notation.
The extra state Array Syntax contains the new binder names.
If stx is a ·, we create a fresh identifier, store it in the
extra state, and return it. Otherwise, we just return stx.
Auxiliary function for expanding the · notation.
The extra state Array Syntax contains the new binder names.
If stx is a ·, we create a fresh identifier, store it in the
extra state, and return it. Otherwise, we just return stx.