coop/rose-ash
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

HS: parser+compiler — toggle for-in lookahead, throttled/debounced modifiers (-2 skips)
Some checks failed
Test, Build, and Deploy / test-build-deploy (push) Failing after 51s
Details

Browse Source 
parser.sx parse-toggle-cmd: when seeing 'toggle .foo for', peek the
following two tokens. If they are '<ident> in', it is a for-in loop
and toggle does NOT consume 'for' as a duration clause. Restores the
trailing for-in to the command list.

parser.sx parse-on (handler modifiers): recognize 'throttled at <ms>'
and 'debounced at <ms>' as handler modifiers. Captured as :throttle /
:debounce kwargs in the on-form parts list.

compiler.sx emit-on: pre-extract :throttle / :debounce from parts via
new _strip-throttle-debounce helper before scan-on, then wrap the built
handler with (hs-throttle! handler ms) or (hs-debounce! handler ms).

runtime.sx: hs-throttle! — closure with __hs-last-fire timestamp,
fires immediately and drops events arriving within ms of the last fire.
hs-debounce! — closure with __hs-timer, clears any pending timer and
schedules a new setTimeout(handler, ms) so only the last burst event
fires.

Both formerly-architectural skips now pass:
- "toggle does not consume a following for-in loop"
- "throttled at <time> drops events within the window"

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
giles
2026-05-08 07:16:27 +00:00
parent 982b9d6be6
commit d0b358eca2
7 changed files with 155 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
lib/hyperscript/compiler.sx
View File

@@ -218,6 +218,27 @@
((parts (rest ast)))
(let
((event-name (first parts)))
;; Pre-extract :throttle and :debounce kwargs (handler-wrapping modifiers)
;; from parts so scan-on doesn't need extra params. Stored as closure vars
;; that the handler-build step inside scan-on can read.
(define _throttle-ms nil)
(define _debounce-ms nil)
(define
_strip-throttle-debounce
(fn
(lst)
(cond
((<= (len lst) 1) lst)
((= (first lst) :throttle)
(do
(set! _throttle-ms (nth lst 1))
(_strip-throttle-debounce (rest (rest lst)))))
((= (first lst) :debounce)
(do
(set! _debounce-ms (nth lst 1))
(_strip-throttle-debounce (rest (rest lst)))))
(true
(cons (first lst) (_strip-throttle-debounce (rest lst)))))))
(define
scan-on
(fn
@@ -250,6 +271,13 @@
((wrapped-body (if catch-info (let ((var (make-symbol (nth catch-info 0))) (catch-body (hs-to-sx (nth catch-info 1)))) (if finally-info (list (quote let) (list (list (quote __hs-exc) nil) (list (quote __hs-reraise) false)) (list (quote do) (list (quote guard) (list var (list true (list (quote let) (list (list var (list (quote host-hs-normalize-exc) var))) (list (quote guard) (list (quote __inner-exc) (list true (list (quote do) (list (quote set!) (quote __hs-exc) (quote __inner-exc)) (list (quote set!) (quote __hs-reraise) true)))) catch-body)))) compiled-body) (hs-to-sx finally-info) (list (quote when) (quote __hs-reraise) (list (quote raise) (quote __hs-exc))))) (list (quote let) (list (list (quote __hs-exc) nil) (list (quote __hs-reraise) false)) (list (quote do) (list (quote guard) (list var (list true (list (quote let) (list (list var (list (quote host-hs-normalize-exc) var))) (list (quote guard) (list (quote __inner-exc) (list true (list (quote do) (list (quote set!) (quote __hs-exc) (quote __inner-exc)) (list (quote set!) (quote __hs-reraise) true)))) catch-body)))) compiled-body) (list (quote when) (quote __hs-reraise) (list (quote raise) (quote __hs-exc))))))) (if finally-info (list (quote do) compiled-body (hs-to-sx finally-info)) compiled-body))))
(let
((handler (let ((uses-the-result? (fn (expr) (cond ((= expr (quote the-result)) true) ((list? expr) (some (fn (x) (uses-the-result? x)) expr)) (true false))))) (let ((base-handler (list (quote fn) (list (quote event)) (if (uses-the-result? wrapped-body) (list (quote let) (list (list (quote the-result) nil)) wrapped-body) wrapped-body)))) (if count-filter-info (let ((mn (get count-filter-info "min")) (mx (get count-filter-info "max"))) (list (quote let) (list (list (quote __hs-count) 0)) (list (quote fn) (list (quote event)) (list (quote begin) (list (quote set!) (quote __hs-count) (list (quote +) (quote __hs-count) 1)) (list (quote when) (if (= mx -1) (list (quote >=) (quote __hs-count) mn) (list (quote and) (list (quote >=) (quote __hs-count) mn) (list (quote <=) (quote __hs-count) mx))) (nth base-handler 2)))))) base-handler)))))
(let
((handler (cond
(_throttle-ms
(list (quote hs-throttle!) handler (hs-to-sx _throttle-ms)))
(_debounce-ms
(list (quote hs-debounce!) handler (hs-to-sx _debounce-ms)))
(true handler))))
(let
((on-call (if every? (list (quote hs-on-every) target event-name handler) (list (quote hs-on) target event-name handler))))
(cond
@@ -309,7 +337,7 @@
(first pair)
handler))
or-sources)))
on-call)))))))))))))
on-call))))))))))))))
((= (first items) :from)
(scan-on
(rest (rest items))
@@ -453,7 +481,7 @@
count-filter-info
elsewhere?
or-sources)))))
(scan-on (rest parts) nil nil false nil nil nil nil nil false nil)))))
(scan-on (_strip-throttle-debounce (rest parts)) nil nil false nil nil nil nil nil false nil)))))
(define
emit-send
(fn