Comments (3)
Hi,
Thanks for the report.
I think this is due to a bug in your definition for number
. The regex /-?[0-9]?/
is saying optionally match the string -
then optionally match any character in the range [0-9]
. Because both are optional this rule includes matching the empty string ""
which can be matched without parsing any input. So the expression <expr>+
is matching many number
s, all of which are the empty string - this means it keeps matching lots of empty strings in an infinite loop without moving the input forward.
I hope this makes sense.
- Dan
from mpc.
And that was the problem, easy to miss. I should have tried the example code from the site, or diff it with my code before writing an Issue. Sorry for that. And thanks. :)
from mpc.
No problem! Enjoy the rest of the book.
from mpc.
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