Hi Darren (and Marcel), Two different approaches: https://docs.raku.org/language/regexes#Conjunction:_&&;
>From the docs: *"For example if you have a regex quoted that matches a quoted string, then `/ <quoted> && <-[x]>* /` matches a quoted string that does not contain the character `x`."* Second approach : https://stackoverflow.com/questions/64909029/is-it-possible-to-do-boolean-assertions-with-raku-regex https://docs.raku.org/language/regexes#Regex_Boolean_condition_check Testing "Regex Boolean condition check" with a one-liner: ~ % cat cats_dogs_jays.txt cat dog jay null cat false dog true jay ~ % raku -ne 'put $/ if $_ ~~ m:g/ ( <wb> <alpha>+ <wb> ) <!{ $0 eq "null" | "false" | "true" }> /;' cats_dogs_jays.txt cat dog jay cat dog jay HTH, Bill. On Jul 30, 2023, at 08:59, Marcel Timmerman <mt1...@gmail.com> wrote: 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>)
