Re: [pro] User defined format functions

Didier Verna didier@lrde.epita.fr writes:

(format stream "... ~\e\ ..." #|...|# str #|...|#)

\ is already meaningful in strings, to escape \ or ". So you'd have to use ~\e\.

Of course, there are package issues. Maybe we would need a centralized mapping between function names (what goes in ~\) and actual symbols denoting the actual function? Possibly with the possibility to override the mapping by providing a package prefix in the ~\ construct?

I don't like it.

WDYT? Does something like that already exists[2]?

The standard already allows control-strings to be functions. So you could write a cl:formatter-like macro with any extension you like.

There's no need for any extension, just use CL.