Re: Metaprogramming

[Teemu Likonen]

Shyam Nath [2019-09-15T13:13:09+10] wrote:

> I want to redefine functions by manipulating the pre-existing
> function; is there any way to do this?

You can keep the original function code in a variable. Use that variable
to define the global function first and later all modified versions of
it.


    (defvar function-code (lambda (...) ...))
    
    (setf (symbol-function 'modifiable-function) function-code)


I think it is better to keep your defuns static and make them call
other functions which are stored in a variable or other predefined
place.


    (defvar modifiable-function (lambda (...) ...))

    (defun static-function (...)
      ;; ...
      (funcall modifiable-function ...)
      ;; ...
      )

-- 
///  OpenPGP key: 4E1055DC84E9DFF613D78557719D69D324539450
//  https://keys.openpgp.org/search?q=tlikonen@iki.fi
/  https://keybase.io/tlikonen  https://github.com/tlikonen

signature.asc
Description: PGP signature