You might just scan your regexes for /\\[a-z]/, but I really don't think in practice you will find anything that actually needs conversion.

Update: Reading more closely, I see a few areas of minor concern for character classes; perl doesn't support collating symbols (e.g. [[.fu.]]) or equivalence class expressions (e.g. [[=à=]]), and perl treats backslash in a character class as an escaping character but egrep should treat it as a literal backslash.

In reply to Re^3: differnce between egrep and perl regex ? by ysth
in thread differnce between egrep and perl regex ? by Random_Walk

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