> ... e.g. the ability to include parenthesized sub-expressions in the "from" part and $1 back-references in the "to" part.

Honestly .... store the full real regexp in your config and eval it (or eval it into a sub to optimize execution time)

 
"245$a": [
        { "regexp": 's/(foo|bar)/He said "$1"/' }
      ]

[download]

There is no way to "safely" abstract the capture-var away, it has to be compiled into the regex and this needs an eval or /ee with all connected security issues.

> but bear in mind I do need the full power of regexp substitutions,

I have the impression your JSON format is an attempt to make it language agnostic. But the "full power" means you will be stuck with Perl.

And full power means that security becomes an illusion.


  DB<111> $_="abc"

  DB<112> s/(.)/@{[print "what? --> $1\n"]}/g
what? --> a
what? --> b
what? --> c

  DB<113>

[download]

Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery

In reply to Re^3: Regexp substitution using variables by LanX
in thread Regexp substitution using variables by MikeTaylor

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.