You are joining strings, yet @parts contains compiled re's. Wouldn't that join the stringified forms of the regex's, not the compile stuff itself?

But I see the general point: Given $r1 and maybe $r2 as compiled regexs, I could say $r= qr/$r1|$r2/ Or if absent say $r=$r1;.

I'm finding that I'm limited in how I break up a huge regex into separate pieces. Pieces can contain named captures and MARK:names, and the assembled result works the same as if it were written as one big string. But a named recursive reference (?&name) must be present when the regex is compiled, not (just) when it is used later.

In reply to Re^2: Composing regex's dynamically by John M. Dlugosz
in thread Composing regex's dynamically by John M. Dlugosz

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