[cl-interpol-devel] Support for Perl $1 and Makefile-like special variables

[Evgeniy Zhemchugov]

I'm not sure if you get me right. Perhaps I haven't made myself clear
enough, sorry. The =~ macro is what I'm going to use in my code, I
don't think it should belong to the library. At least not until I test
it in one of my projects. The actual modification I propose is the
change in the read-form function so user would be able to supply their
own reader to be executed during expansion of the $form --- in the
same way as we supply readers to Lisp's read via set-macro-character.
No change of CL-PPCRE is required in this case --- everything can be
done on the user side.

I can suggest another solution though. We can declare the *read-form*
special variable like this:

(defvar *read-form* #'read-form)

and replace the calls to read-form by funcalls to *read-form* in the
inner-reader function. The user can then set this variable to the
value they desire thus controlling the way cl-interpol expands
$-forms. However, I think the former solution is more elegant.

Don't bother to answer soon. I'm also busy these days and probably
won't be able to work with cl-interpol until the middle of January.
Happy new year!