[slime-devel] slime-macroexpand issue/wishlist item

[Nikodemus Siivola]

If a macroexpansion communicates with other parts of the system using
eg. structures or instances, expanding nested macros doesn't work in
Slime:

...assuming you have CFFI installed and loaded...

(cffi:defcallback foo :void ((data :string)) (error data))

C-RET expands it to

(PROGN
 (CFFI-SYS:%DEFCALLBACK FOO :VOID (DATA) (:POINTER)
                        (LET ((DATA
                               (CFFI:TRANSLATE-FROM-FOREIGN DATA

#<CFFI::FOREIGN-STRING-TYPE :UTF-8>)))
                          (BLOCK FOO (ERROR DATA)))
                        :CALLING-CONVENTION :CDECL)
 'FOO)

where the %DEFCALLBACK is also a macro. Trying to re-expand that using
C-RET breaks when it tries to READ #<.

It would be nice if (a) the second expansion worked (2) the #<...>
objects in the buffer were presentations.

Cheers,

 -- Nikodemus