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| author | Mattias Engdegård <mattiase@acm.org> | 2021-10-19 12:03:15 +0200 |
|---|---|---|
| committer | Mattias Engdegård <mattiase@acm.org> | 2021-10-19 21:59:41 +0200 |
| commit | 0bb0fbee68498be1a74e03fe97ea3ad9297f8bfe (patch) | |
| tree | 4c222d96f9873c78e07a89f947d8693e2d4431c8 /test/lisp/emacs-lisp | |
| parent | 53bea8796d52d90d09c29780070442d59e1883b7 (diff) | |
| download | emacs-0bb0fbee68498be1a74e03fe97ea3ad9297f8bfe.tar.gz emacs-0bb0fbee68498be1a74e03fe97ea3ad9297f8bfe.tar.bz2 emacs-0bb0fbee68498be1a74e03fe97ea3ad9297f8bfe.zip | |
Improve TCO test coverage
* test/lisp/emacs-lisp/cl-macs-tests.el (cl-macs--labels):
Exercise `cond` in tail position in two different ways.
Diffstat (limited to 'test/lisp/emacs-lisp')
| -rw-r--r-- | test/lisp/emacs-lisp/cl-macs-tests.el | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/test/lisp/emacs-lisp/cl-macs-tests.el b/test/lisp/emacs-lisp/cl-macs-tests.el index f4e2e46a019..033764a7f98 100644 --- a/test/lisp/emacs-lisp/cl-macs-tests.el +++ b/test/lisp/emacs-lisp/cl-macs-tests.el @@ -637,17 +637,26 @@ collection clause." (/ 1 (logand n 1)) (arith-error (len3 (cdr xs) (1+ n))) (:success (len3 (cdr xs) (+ n k)))) - n))) + n)) + + ;; Tail calls in `cond'. + (len4 (xs n) + (cond (xs (cond (nil 'nevertrue) + ((len4 (cdr xs) (1+ n))))) + (t n)))) (should (equal (len nil 0) 0)) (should (equal (len2 nil 0) 0)) (should (equal (len3 nil 0) 0)) + (should (equal (len4 nil 0) 0)) (should (equal (len list-42 0) 42)) (should (equal (len2 list-42 0) 42)) (should (equal (len3 list-42 0) 42)) + (should (equal (len4 list-42 0) 42)) ;; Should not bump into stack depth limits. (should (equal (len list-42k 0) 42000)) (should (equal (len2 list-42k 0) 42000)) - (should (equal (len3 list-42k 0) 42000)))) + (should (equal (len3 list-42k 0) 42000)) + (should (equal (len4 list-42k 0) 42000)))) ;; Check that non-recursive functions are handled more efficiently. (should (pcase (macroexpand '(cl-labels ((f (x) (+ x 1))) (f 5))) |