I had previously checked out the re pragma's debug functions but I didn't find them very useful. For example, either of the regexes in the OP generates:

synthetic stclass "ANYOF[a-z][]".
Final program:
   1: BOL (2)
   2: OPEN1 (4)
   4:   PLUS (16)
   5:     ANYOF[a-z][] (0)
  16: CLOSE1 (18)
  18: STAR (20)
  19:   DIGIT (0)
  20: EOL (21)
  21: END (0)
floating ""$ at 1..2147483647 (checking floating) stclass ANYOF[a-z][]
+ anchored(BOL) minlen 1

[download]

It's heartening that the output for both of them is identical, as I'd expect, but I don't think parsing this output in order to reconstruct the source regex will be significantly easier than modifying the source regex directly :-(

In reply to Re^2: How to strip comments and whitespace from a regex defined with /x? by jh
in thread How to strip comments and whitespace from a regex defined with /x? by jh

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