608ff34d55
96/96 regression tests pass (+ffi-09-foreign-result-chain).
Opaque C-handle pattern that mirrors how real sx code threads
MTLBuffer*, AAssetManager*, file pointers, etc. through composite
sx values. C side has a trivial heap-int handle (`ffi_chain_make`
returning `void*`, `ffi_chain_bump` / `_peek` / `_dispose`). The sx
side exercises:
1. Chained calls — make -> bump -> bump -> peek; one handle
threaded through four FFI sites in sequence.
2. Struct field — `Counter { handle: *void; label: string; }`
hosts the handle; methods/accesses go through
`.handle` to feed back into C.
3. List(*void) — push N handles, iterate, peek each, iterate
again to bump each, iterate again to read
back. Catches any aliasing / lifetime breakage
when handles round-trip through the slice
backing of List.
14 lines
311 B
Plaintext
14 lines
311 B
Plaintext
peek after make = 100
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bump(+5) = 105
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bump(+3) = 108
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peek after bumps = 108
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ctr label = ctr-a
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ctr peek = 50
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ctr after bump = 57
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list[0] peek = 0
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list[1] peek = 10
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list[2] peek = 20
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list[0] after bump= 1
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list[1] after bump= 11
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list[2] after bump= 21
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