collect key)
#'string<))
'(key1 key2)))
+
+;;; Bug 81, reported by Wolfhard Buss on cmucl-help 2001-02-14, was
+;;; fixed by Alexey Dejneka's patch on sbcl-devel 2001-09-30.
+(assert (equal '(0.0 1.0 2.0 3.0)
+ (loop with (a . b) of-type float = '(0.0 . 1.0)
+ and (c . d) of-type float = '(2.0 . 3.0)
+ return (list a b c d))))
+
+;;; a bug reported and fixed by Alexey Dejneka sbcl-devel 2001-10-05:
+;;; The type declarations should apply, hence under Python's
+;;; declarations-are-assertions rule, the code should signal a type
+;;; error.
+(assert (typep (nth-value 1
+ (ignore-errors
+ (funcall (lambda ()
+ (loop with (a . b)
+ of-type float = '(5 . 5)
+ return (list a b))))))
+ 'type-error))
+
+;;; bug 103, reported by Arthur Lemmens sbcl-devel 2001-05-05,
+;;; fixed by Alexey Dejneka patch sbcl-devel 2001-10-05:
+;;; LOOP syntax requires that forms after INITIALLY, FINALLY, and DO
+;;; must be compound forms.
+(multiple-value-bind (function warnings-p failure-p)
+ (compile nil
+ '(lambda ()
+ (loop while t do
+ *print-level*
+ (print t))))
+ (declare (ignore function warnings-p))
+ (assert failure-p))
+
+;;; a bug reported by Paul F. Dietz (in his ANSI test suite):
+;;; duplicate bindings in LOOP must signal errors of type
+;;; PROGRAM-ERROR.
+(assert (typep (nth-value 1
+ (ignore-errors
+ (funcall (lambda ()
+ (loop for (a . a) in '((1 . 2) (3 . 4))
+ return a)))))
+ 'program-error))
+
+;;; similar to gcl/ansi-test LOOP.1.27, and fixed at the same time:
+(assert (equal (loop for x downto 7 by 2 from 13 collect x) '(13 11 9 7)))
+
+;;; some more from gcl/ansi-test:
+(let ((table (make-hash-table)))
+ (setf (gethash 'foo table) '(bar baz))
+ (assert (= (loop for nil being the hash-keys of table count t) 1))
+ (assert (equal (loop for nil being the hash-keys of table
+ using (hash-value (v1 . v2))
+ when v1
+ return v2)
+ '(baz))))
+
+(assert (= (loop for nil being the external-symbols of :cl count t) 978))
+(assert (= (loop for x being the external-symbols of :cl count x) 977))
+
+(let ((*package* (find-package :cl)))
+ (assert (= (loop for x being each external-symbol count t) 978)))
+
+(assert (eq (loop for a = (return t) return nil) t))
+
+(multiple-value-bind (result error)
+ (ignore-errors
+ (loop for nil being the external-symbols of :nonexistent-package
+ count t))
+ (assert (null result))
+ (assert (typep error 'package-error)))
+
+(assert (equal (loop for i from 1 repeat (the (integer 7 7) 7) collect i)
+ '(1 2 3 4 5 6 7)))
+
+(multiple-value-bind (result error)
+ (ignore-errors
+ (eval '(loop for i from 1 repeat 7 of-type fixnum collect i)))
+ (assert (null result))
+ (assert (typep error 'program-error)))
+
+(assert (equal
+ (ignore-errors (loop for i from 1 repeat 6.5 collect i))
+ (ignore-errors (loop for i from 1 repeat (eval '6.5) collect i))))
+
+(assert (eq (block nil
+ (loop named foo do (loop-finish) finally (return :good))
+ :bad)
+ :good))
+
+(assert (= (loop with (a nil) = '(1 2) return a) 1))
+(assert (= (loop with (nil a) = '(1 2) return a) 2))
+(assert (= (loop with (a . nil) = '(1 2) return a) 1))
+(assert (equal (loop with (nil . a) = '(1 2) return a) '(2)))
+
+(multiple-value-bind (result error)
+ (ignore-errors
+ (loop for i in '(1 2 3) collect i always (< i 4)))
+ (assert (null result))
+ (assert (typep error 'program-error)))
+(assert (equal
+ (loop for i in '(1 2 3) collect i into foo always (< i 4)
+ finally (return foo))
+ '(1 2 3)))
+(assert (equal
+ (loop for i in '(1 2 3) collect i into foo always (= i 4)
+ finally (return foo))
+ nil))
+(multiple-value-bind (result error)
+ (ignore-errors
+ (loop for i in '(1 2 3) always (< i 4) collect i))
+ (assert (null result))
+ (assert (typep error 'program-error)))
+(assert (equal
+ (loop for i in '(1 2 3) always (< i 4) collect i into foo
+ finally (return foo))
+ '(1 2 3)))
+(assert (equal
+ (loop for i in '(1 2 3) always (= i 4) collect i into foo
+ finally (return foo))
+ nil))
+(multiple-value-bind (result error)
+ (ignore-errors
+ (loop for i in '(1 2 3) thereis (= i 3) collect i))
+ (assert (null result))
+ (assert (typep error 'program-error)))
+
+(multiple-value-bind (result error)
+ (ignore-errors
+ (loop with i = 1 for x from 1 to 3 collect x into i))
+ (assert (null result))
+ (assert (typep error 'program-error)))
+(multiple-value-bind (result error)
+ ;; this one has a plausible interpretation in terms of LET*, but
+ ;; ANSI seems specifically to disallow it
+ (ignore-errors
+ (loop with i = 1 with i = (1+ i)
+ for x from 1 to 3
+ collect (+ x i)))
+ (assert (null result))
+ (assert (typep error 'program-error)))
+
+(let ((it 'z))
+ (assert (equal
+ ;; this one just seems weird. Nevertheless...
+ (loop for i in '(a b c d)
+ when i
+ collect it
+ and collect it)
+ '(a z b z c z d z))))
+
+(let ((ht (make-hash-table)))
+ (setf (gethash 1 ht) 3)
+ (setf (gethash 7 ht) 15)
+ (assert (= (loop for v fixnum being each hash-key in ht sum v) 8))
+ (assert (= (loop for v fixnum being each hash-value in ht sum v) 18))
+ (assert (raises-error? (loop for v float being each hash-value in ht sum v)
+ type-error)))
+
+;; arithmetic indexes can be NIL or symbols.
+(assert (equal (loop for nil from 0 to 2 collect nil)
+ '(nil nil nil)))
+(assert (equal (loop for nil to 2 collect nil)
+ '(nil nil nil)))
+
+;; although allowed by the loop syntax definition in 6.2/LOOP,
+;; 6.1.2.1.1 says: "The variable var is bound to the value of form1 in
+;; the first iteration[...]"; since we can't bind (i j) to anything,
+;; we give a program error.
+(multiple-value-bind (function warnings-p failure-p)
+ (compile nil
+ `(lambda ()
+ (loop for (i j) from 4 to 6 collect nil)))
+ (assert failure-p))
+
+;; ...and another for indexes without FROM forms (these are treated
+;; differently by the loop code right now
+(multiple-value-bind (function warnings-p failure-p)
+ (compile nil
+ `(lambda ()
+ (loop for (i j) to 6 collect nil)))
+ (assert failure-p))
+
+(assert
+ (equal
+ (let ((x 2d0))
+ (loop for d of-type double-float from 0d0 to 10d0 by x collect d))
+ '(0d0 2d0 4d0 6d0 8d0 10d0)))
+(assert
+ (equal
+ (let ((x 2d0))
+ (loop for d of-type double-float downfrom 10d0 to 0d0 by x collect d))
+ '(10d0 8d0 6d0 4d0 2d0 0d0)))
+
+(let ((fn (handler-case
+ (compile nil '(lambda ()
+ (declare (special x y))
+ (loop thereis (pop x) thereis (pop y))))
+ (warning (c) (error "Warned: ~S" c)))))
+ (let ((x (list nil nil 1))
+ (y (list nil 2 nil)))
+ (declare (special x y))
+ (assert (= (funcall fn) 2))))
+
+;;; Incorrect LIST type declaration, reported and patched by Teemu
+;;; Kalvas: end testing is done "as if by atom" so this is supposed
+;;; to work.
+(assert (equal '(1 2) (loop for (a . b) on '(1 2 . 3) collect a)))
+
+;;; Detection of duplicate bindings, reported by Bruno Haible for CMUCL.
+(multiple-value-bind (_ condition)
+ (ignore-errors
+ (macroexpand '(LOOP WITH A = 0 FOR A DOWNFROM 10 TO 0 DO (PRINT A))))
+ (declare (ignore _))
+ (assert (typep condition 'program-error)))
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