On Sun, Oct 11, 2020 at 08:08:07AM +0200, Claus Assmann wrote:
I'm trying to use a more generic approach for some patterns to handle mailing list, e.g., something like:save-hook "~C ietf-\\([a-z0-9]+\\)@ietf.org" =%1 instead of having one entry for each mailing list. Is that possible with the current mutt features?
No, that's not possible right now. The regexec() is inside the pattern modifier processor (e.g. ~C). The save-hook mailbox evaluation takes place far removed from there, preventing easy access to the back reference structure as well as the string the back reference would apply to.
Additionally, nothing prevents multiple patterns modifiers with a regexp.
It seems that back-references in regular expressions can only be used for "spam": spam pattern format
The "pattern" argument for spam isn't really a pattern, it's a regexp. The regexec() matching and format generation take place in the same place for the spam command, so it's easy to process back references.
-- Kevin J. McCarthy GPG Fingerprint: 8975 A9B3 3AA3 7910 385C 5308 ADEF 7684 8031 6BDA
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