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| author | Hugo Hörnquist <hugo@lysator.liu.se> | 2022-10-16 22:10:18 +0200 |
|---|---|---|
| committer | Hugo Hörnquist <hugo@lysator.liu.se> | 2022-10-16 23:28:34 +0200 |
| commit | 377171cfe46aae3b27ad6221adbf4521359c2d52 (patch) | |
| tree | 8df4f004ea227a93ae1837631d350036679aded8 /module/hnh | |
| parent | Fix wrongly ordered TODO's. (diff) | |
| download | calp-377171cfe46aae3b27ad6221adbf4521359c2d52.tar.gz calp-377171cfe46aae3b27ad6221adbf4521359c2d52.tar.xz | |
Extend catch to allow pre-unwind handlers.
Diffstat (limited to 'module/hnh')
| -rw-r--r-- | module/hnh/util.scm | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/module/hnh/util.scm b/module/hnh/util.scm index bd38a445..929f23a0 100644 --- a/module/hnh/util.scm +++ b/module/hnh/util.scm @@ -538,9 +538,12 @@ (define-syntax catch* - (syntax-rules () + (syntax-rules (pre-unwind) + ((_ thunk ((pre-unwind key) handler)) + (with-throw-handler (quote key) thunk handler)) ((_ thunk (key handler)) (catch (quote key) thunk handler)) - ((_ thunk (key handler) rest ...) - (catch* (lambda () (catch (quote key) thunk handler)) + + ((_ thunk pair rest ...) + (catch* (lambda () (catch* thunk pair)) rest ...)))) |