Hello AnomalousMonk,

The output can’t be exactly the same across versions 5.8 to 5.14, because in 5.14.0 the (?^...) construct was added to signify default modifiers (see perl5140delta#Regular-Expressions). So, from 5.14 on, the output is:

14:13 >perl 1868_SoPW.pl
(?^:(?).*u\/ba$)
A: match
(?^msx: \A foo (?^:(?).*u\/ba$) )
B: match

14:13 >
[download]

But with that caveat, the behaviour is identical across my Strawberry Perl versions 5.12.3, 5.14.4, 5.18.2, 5.20.2, 5.22.0, 5.24.1, and 5.26.0.

My guess — and it’s no more than a guess — is that the documentation is wrong, and should read: Zero or more embedded pattern-match modifiers ...

Hope that helps,

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