C++0x 4 - 暇つぶし2ch

C++0x 4 at TECH

160:デフォルトの名無しさん
08/07/12 00:59:19
>>156
CL-USER> (lisp-implementation-type)
"SBCL"
CL-USER> (lisp-implementation-version)
"1.0.17.42"
CL-USER> (defun a (x y)
(declare (optimize (speed 3) (safety 0))
(type fixnum x y))
(cond ((zerop y) 0)
((zerop x) (the fixnum (* 2 y)))
((= y 1) 2)
(t (the fixnum (a (- x 1) (the fixnum (a x (- y 1))))))))
A
CL-USER> (disassemble 'a)
;;; 続く

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