On 21 December 2011 20:30, Ryan Davis <r...@acceleration.net> wrote: > I'm using a hash-table as a cache, and had a problem with > ensure-gethash. Some example code / output:
I must be missing something. Why the CONSTANTP and LAMBDA instead of (defmacro ensure-gethash (key hash-table &optional default) "Like GETHASH, but if KEY is not found in the HASH-TABLE saves the DEFAULT under key before returning it. Secondary return value is true if key was already in the table." `(multiple-value-bind (value ok) (gethash ,key ,hash-table) (if ok (values value ok) (values (setf (gethash ,key ,hash-table) ,default) nil)))) ? Cheers, -- nikodemus _______________________________________________ alexandria-devel mailing list alexandria-devel@common-lisp.net http://lists.common-lisp.net/cgi-bin/mailman/listinfo/alexandria-devel