On 19/03/2020 14:12, Martin Gregorie wrote:
....
> Another annoyance with regcomp/regexec is that the common :alnum:
> abbreviation is *only* recognised if it occupies the whole set of
> alternates, i.e. [:alnum:] works, [.:alnum:_-] doesn't.

IMBW But these do indeed /only/ work inside a [...] construct so
shouldn't your examples read
[[:alnum:]]
and
[.[:alnum:]_-]

(see eg
https://perldoc.perl.org/perlrecharclass.html#Bracketed-Character-Classes
under 'POSIX character classes. Also eg
https://stackoverflow.com/questions/1085083/regular-expressions-in-c-examples
)




--
Mike Scott
Harlow, England

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