Re: [pro] why :key arguments?

Nikodemus Siivola nikodemus@random-state.net writes:

On 4 July 2011 14:46, Stas Boukarev stassats@gmail.com wrote:

...

• They can't be used with APPLY or FUNCALL.

Actually, they can be used with FUNCALL.

(Otherwise, I echo pretty much everything that Stas said.)

Compiler-macros are, however, of decent tool for optimizing common cases of :KEY and :TEST arguments.

Remember however, that you cannot write in a conforming program a compiler macro for a function named in the CL package.

clhs define-compiler-macro: "The consequences of writing a compiler macro definition for a function in the COMMON-LISP package are undefined;"