If it is only ' and ", you don't necessarily have to capture:

m/(?(?=Z|Y)[Z]|[Y])/

[download]

That's unsightly enough that I would probably want to define it as a named subpattern using: 

(?(DEFINE)
    (?<NAME_PAT>....)
)

[download]

*sigh* I posted too quickly... each alternate pattern would need to be tested individually, I think:

print "Yes"
  if $string =~ m/(?(?=')'[^']|)
                  (?(?=")"[^"]|)/x;

[download]

Update:

And even that simplifies to: 

m/(?:'[^']|"[^"])/

[download]

...so I'm sure the actual usage must be more complex. :) My apologies. heh.


Dave

In reply to Re: Named capture backreferences cannot be used in character classes? by davido
in thread Named capture backreferences cannot be used in character classes? by BrowserUk

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