+;;; tests of behaviour of colliding accessors.
+(defstruct (bug127-foo (:conc-name bug127-baz-)) a)
+(assert (= (bug127-baz-a (make-bug127-foo :a 1)) 1))
+(defstruct (bug127-bar (:conc-name bug127-baz-) (:include bug127-foo)) b)
+(assert (= (bug127-baz-a (make-bug127-bar :a 1 :b 2)) 1))
+(assert (= (bug127-baz-b (make-bug127-bar :a 1 :b 2)) 2))
+(assert (= (bug127-baz-a (make-bug127-foo :a 1)) 1))
+
+(defun bug127-flurble (x)
+ x)
+(defstruct bug127 flurble)
+(assert (= (bug127-flurble (make-bug127 :flurble 7)) 7))
+
+(defstruct bug127-a b-c)
+(assert (= (bug127-a-b-c (make-bug127-a :b-c 9)) 9))
+(defstruct (bug127-a-b (:include bug127-a)) c)
+(assert (= (bug127-a-b-c (make-bug127-a :b-c 9)) 9))
+(assert (= (bug127-a-b-c (make-bug127-a-b :b-c 11 :c 13)) 11))
+
+(defstruct (bug127-e (:conc-name bug127--)) foo)
+(assert (= (bug127--foo (make-bug127-e :foo 3)) 3))
+(defstruct (bug127-f (:conc-name bug127--)) foo)
+(assert (= (bug127--foo (make-bug127-f :foo 3)) 3))
+(assert (raises-error? (bug127--foo (make-bug127-e :foo 3)) type-error))
+
+;;; FIXME: should probably do the same tests on DEFSTRUCT :TYPE
+\f
+;;; As noted by Paul Dietz for CMUCL, :CONC-NAME handling was a little
+;;; too fragile:
+(defstruct (conc-name-syntax :conc-name) a-conc-name-slot)
+(assert (eq (a-conc-name-slot (make-conc-name-syntax :a-conc-name-slot 'y))
+ 'y))
+;;; and further :CONC-NAME NIL was being wrongly treated:
+(defpackage "DEFSTRUCT-TEST-SCRATCH")
+(defstruct (conc-name-nil :conc-name)
+ defstruct-test-scratch::conc-name-nil-slot)
+(assert (= (defstruct-test-scratch::conc-name-nil-slot
+ (make-conc-name-nil :conc-name-nil-slot 1)) 1))
+(assert (raises-error? (conc-name-nil-slot (make-conc-name-nil))
+ undefined-function))
+\f
+;;; The named/typed predicates were a little fragile, in that they
+;;; could throw errors on innocuous input:
+(defstruct (list-struct (:type list) :named) a-slot)
+(assert (list-struct-p (make-list-struct)))
+(assert (not (list-struct-p nil)))
+(assert (not (list-struct-p 1)))
+(defstruct (offset-list-struct (:type list) :named (:initial-offset 1)) a-slot)
+(assert (offset-list-struct-p (make-offset-list-struct)))
+(assert (not (offset-list-struct-p nil)))
+(assert (not (offset-list-struct-p 1)))
+(assert (not (offset-list-struct-p '(offset-list-struct))))
+(assert (not (offset-list-struct-p '(offset-list-struct . 3))))
+(defstruct (vector-struct (:type vector) :named) a-slot)
+(assert (vector-struct-p (make-vector-struct)))
+(assert (not (vector-struct-p nil)))
+(assert (not (vector-struct-p #())))
+