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December 2009

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[cl-interpol-devel] Support for Perl $1 and Makefile-like special variables
by Evgeniy Zhemchugov 21 Dec '09

21 Dec '09

Dear cl-interpol developer(s), I would like to use cl-interpol to parse strings containing Perl subpattern variables like $1 and Makefile special variables like $<, $^ etc. I also want statements like #?"$(f 5)" when *optional-delimiters-p* is t to be expanded into something like (with-output-to-string (#:string) (princ (f 5) #:string)) rather than (with-output-to-string (#:string) (princ (progn f 5) #:string)) as they do now. (However, for better compatibility with Makefiles I need to treat the case of the list made of a single element in a special way, expanding it to the value of the corresponding variable.) Overall, I would like to have better control over the read-form function, maybe the possibility to supply my own one. Could you install some hook there? I'd gladly do it myself and send you a patch but I'm not sure which way is the best and whether you will accept such a change at all. If you advice me some workaround that doesn't involve modifying cl-interpol it would also be great. I just don't want to fork or recreate the whole library because of a single function.

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