rx-info

rx-info is a compiled Lisp function in `rx.el'.

(rx-info OP HEAD)

Return parsing/code generation info for OP.
If OP is the space character ASCII 32, return info for the symbol `?'.
If OP is the character `?', return info for the symbol `??'.
See also `rx-constituents'.
If HEAD is non-nil, then OP is the head of a sexp, otherwise it's
a standalone symbol.