On 30-07-2023 06:21, Darren Duncan wrote:
Hello, I have a Raku regex question.
See the following:
token nonquoted_alphanumeric_text
{
<!before [null | false | true] <wb>>
<[ A..Z _ a..z ]> <[ 0..9 A..Z _ a..z ]>*
}
What I want is for "nonquoted_alphanumeric_text" to match any simple
ASCII bareword EXCEPT a few special cases indicated in the example.
I was hoping there might be some better way of specifying this than my
example.
Is there any more direct way in Raku to say, match this pattern
initially, but if the result equals these exceptional values then
treat it as having not matched.
I am looking for a fully declarative solution in the grammar itself,
not something involving post-processing.
Thank you.
-- Darren Duncan
You can try: <|wb><ALPHA><ALNUM>*
(From:
https://docs.raku.org/language/regexes#Predefined_character_classes<https://docs.raku.org/language/regexes#Regexes><https://docs.raku.org/language/regexes#Predefined_character_classes>)