Hey Stephen,
I don't know that we see enough of your code to say for sure what's going
on, but my limited guess is that if "if_group" is your top-level pattern,
then it'll never understand ELSE because else_group is not referenced
anywhere downstream of if_group. If so, what about having the elem
Can anyone suggest something for me to read to learn and understand look ahead
and fall back.
I am have trouble writing a partial C pre-processor and wish to create a few
non-terminals to handle the many different # things that can occur in
header files.
So if I have a non-terminal to handle
