...it's likely better not to use anything that exotic in production code.

You're absolutely right, and I probably should've added a "still experimental" warning. (In fact, I wouldn't use it myself, if my well-being depended on it :)  OTOH, if people never really use those more exotic features (and report bugs, if found!), they'll remain experimental forever...

As to the original problem, does anyone know if backrefs are supposed to work within the {} quantifier, or not? (In the docs, I couldn't find anything explicit either way.)  I can well imagine that it's non-trivial to implement, but as the OP said, it doesn't seem too far off to attempt to use them that way, in particular as they do work outside of the quantifier.

In reply to Re^2: Backref in a regex quantifier by almut
in thread Backref in a regex quantifier by Anonymous Monk

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