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rose-ash/lib/haskell/tests/ioref.sx
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haskell: Phase 15 — IORef (5 ops + module wiring + ioref.sx 13/13 + counter.hs 7/7 + accumulate.hs 8/8)
hk-bind-data-ioref! registers newIORef / readIORef / writeIORef /
modifyIORef / modifyIORef' under the import alias (default IORef).
Representation: dict {"hk-ioref" true "hk-value" v} allocated inside IO.
modifyIORef' uses hk-deep-force on the new value before write.

Side-effect: fixed pre-existing bug in import handler — modname was
reading (nth d 1) (the qualified flag) instead of (nth d 2). All
'import qualified … as Foo' paths were silently no-ops; map.sx unit
suite jumps from 22→26 passing.

Conformance now 33/34 programs, 266/269 tests (only pre-existing
palindrome.hs 9/12 still failing on string-as-list reversal, present
on prior commit).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-07 18:49:55 +00:00

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;; Phase 15 — IORef unit tests.
(hk-test
"newIORef + readIORef returns initial value"
(hk-deep-force
(hk-run
"import qualified Data.IORef as IORef\nmain = do { r <- IORef.newIORef 42; v <- IORef.readIORef r; return v }"))
(list "IO" 42))
(hk-test
"writeIORef updates the cell"
(hk-deep-force
(hk-run
"import qualified Data.IORef as IORef\nmain = do { r <- IORef.newIORef 0; IORef.writeIORef r 99; v <- IORef.readIORef r; return v }"))
(list "IO" 99))
(hk-test
"writeIORef returns IO ()"
(hk-deep-force
(hk-run
"import qualified Data.IORef as IORef\nmain = do { r <- IORef.newIORef 0; IORef.writeIORef r 1 }"))
(list "IO" (list "Tuple")))
(hk-test
"modifyIORef applies a function"
(hk-deep-force
(hk-run
"import qualified Data.IORef as IORef\nmain = do { r <- IORef.newIORef 5; IORef.modifyIORef r (\\x -> x * 2); v <- IORef.readIORef r; return v }"))
(list "IO" 10))
(hk-test
"modifyIORef' (strict) applies a function"
(hk-deep-force
(hk-run
"import qualified Data.IORef as IORef\nmain = do { r <- IORef.newIORef 7; IORef.modifyIORef' r (\\x -> x + 3); v <- IORef.readIORef r; return v }"))
(list "IO" 10))
(hk-test
"two reads return the same value"
(hk-deep-force
(hk-run
"import qualified Data.IORef as IORef\nmain = do { r <- IORef.newIORef 11; a <- IORef.readIORef r; b <- IORef.readIORef r; return (a + b) }"))
(list "IO" 22))
(hk-test
"shared ref across do-steps: write then read"
(hk-deep-force
(hk-run
"import qualified Data.IORef as IORef\nmain = do { r <- IORef.newIORef 1; IORef.writeIORef r 2; IORef.writeIORef r 3; v <- IORef.readIORef r; return v }"))
(list "IO" 3))
(hk-test
"two refs are independent"
(hk-deep-force
(hk-run
"import qualified Data.IORef as IORef\nmain = do { r1 <- IORef.newIORef 1; r2 <- IORef.newIORef 2; IORef.writeIORef r1 10; a <- IORef.readIORef r1; b <- IORef.readIORef r2; return (a + b) }"))
(list "IO" 12))
(hk-test
"string-valued IORef"
(hk-deep-force
(hk-run
"import qualified Data.IORef as IORef\nmain = do { r <- IORef.newIORef \"hi\"; IORef.writeIORef r \"bye\"; v <- IORef.readIORef r; return v }"))
(list "IO" "bye"))
(hk-test
"list-valued IORef + cons"
(hk-deep-force
(hk-run
"import qualified Data.IORef as IORef\nmain = do { r <- IORef.newIORef [1,2,3]; IORef.modifyIORef r (\\xs -> 0 : xs); v <- IORef.readIORef r; return v }"))
(list
"IO"
(list ":" 0 (list ":" 1 (list ":" 2 (list ":" 3 (list "[]")))))))
(hk-test
"counter loop: increment N times"
(hk-deep-force
(hk-run
"import qualified Data.IORef as IORef\nloop r 0 = return ()\nloop r n = do { IORef.modifyIORef r (\\x -> x + 1); loop r (n - 1) }\nmain = do { r <- IORef.newIORef 0; loop r 10; v <- IORef.readIORef r; return v }"))
(list "IO" 10))
(hk-test
"modifyIORef' inside a loop"
(hk-deep-force
(hk-run
"import qualified Data.IORef as IORef\ngo r 0 = return ()\ngo r n = do { IORef.modifyIORef' r (\\x -> x + n); go r (n - 1) }\nmain = do { r <- IORef.newIORef 0; go r 5; v <- IORef.readIORef r; return v }"))
(list "IO" 15))
(hk-test
"newIORef inside a function passed via parameter"
(hk-deep-force
(hk-run
"import qualified Data.IORef as IORef\nbump r = IORef.modifyIORef r (\\x -> x + 100)\nmain = do { r <- IORef.newIORef 1; bump r; v <- IORef.readIORef r; return v }"))
(list "IO" 101))