A-M baby

Task/Function-prototype/Common-Lisp/function-prototype-1.lisp

@@ -0,0 +1,13 @@
+;; An empty lambda list () takes 0 parameters.
+(defun 0args ()
+  (format t "Called 0args~%"))
+
+;; This lambda list (a b) takes 2 parameters.
+(defun 2args (a b)
+  (format t "Called 2args with ~A and ~A~%" a b))
+
+;; Local variables from lambda lists may have declarations.
+;; This function takes 2 arguments, which must be integers.
+(defun 2ints (i j)
+  (declare (type integer i j))
+  (/ (+ i j) 2))

Task/Function-prototype/Common-Lisp/function-prototype-2.lisp

@@ -0,0 +1,8 @@
+;; Rest parameter, for variadic functions: r is a list of arguments.
+(a b &rest r)
+
+;; Optional parameter: i defaults to 3, (f 1 2) is same as (f 1 2 3).
+(a b &optional (i 3))
+
+;; Keyword parameters: (f 1 2 :c 3 :d 4) is same as (f 1 2 :d 4 :c 3).
+(a b &key c d)