Loading asdf.lisp +10 −0 Original line number Diff line number Diff line Loading @@ -467,6 +467,16 @@ processed in order by OPERATE.")) ;;;; General Purpose Utilities (defmacro while-collecting ((&rest collectors) &body body) "COLLECTORS should be a list of names for collections. A collector defines a function that, when applied to an argument inside BODY, will add its argument to the corresponding collection. Returns multiple values, a list for each collection, in order. E.g., \(while-collecting \(foo bar\) \(dolist \(x '\(\(a 1\) \(b 2\) \(c 3\)\)\) \(foo \(first x\)\) \(bar \(second x\)\)\)\) Returns two values: \(A B C\) and \(1 2 3\)." (let ((vars (mapcar #'(lambda (x) (gensym (symbol-name x))) collectors)) (initial-values (mapcar (constantly nil) collectors))) `(let ,(mapcar #'list vars initial-values) Loading Loading
asdf.lisp +10 −0 Original line number Diff line number Diff line Loading @@ -467,6 +467,16 @@ processed in order by OPERATE.")) ;;;; General Purpose Utilities (defmacro while-collecting ((&rest collectors) &body body) "COLLECTORS should be a list of names for collections. A collector defines a function that, when applied to an argument inside BODY, will add its argument to the corresponding collection. Returns multiple values, a list for each collection, in order. E.g., \(while-collecting \(foo bar\) \(dolist \(x '\(\(a 1\) \(b 2\) \(c 3\)\)\) \(foo \(first x\)\) \(bar \(second x\)\)\)\) Returns two values: \(A B C\) and \(1 2 3\)." (let ((vars (mapcar #'(lambda (x) (gensym (symbol-name x))) collectors)) (initial-values (mapcar (constantly nil) collectors))) `(let ,(mapcar #'list vars initial-values) Loading