66bdc70bf1
Move examples/*.sx and their expected/ snapshots into per-category subfolders (examples/<category>/...). Folder = leading filename token, with ffi-objc/ffi-jni kept whole; filenames are unchanged. The corpus runner and LSP sweep now discover each category's expected/ dir, while issues/ stays flat. Example 1058's repo-root-relative companion import is made file-relative. Path strings embedded in 164 snapshots were regenerated (path-only changes). Test-layout docs in CLAUDE.md updated.
67 lines
2.1 KiB
Plaintext
67 lines
2.1 KiB
Plaintext
// ffi-objc-arc-03 — #property(weak) on sx-defined class.
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//
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// Weak contract:
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// - setter calls objc_storeWeak — does NOT retain.
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// - getter calls objc_loadWeakRetained + autorelease — auto-nils
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// if the target has been deallocated.
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// - -dealloc calls objc_destroyWeak on each weak ivar.
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//
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// Observation: assign a target to the weak property. Drop the
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// caller's strong reference. Read back via the weak getter — should
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// be `null` (the target deallocated when its last strong ref
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// dropped, and the weak slot auto-niled).
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//
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// Pre-M4.B: setter just stores the pointer (no storeWeak); getter
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// reads the raw pointer (no loadWeakRetained). After target's
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// release, the slot points at freed memory — the read returns the
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// stale pointer (not null). The test catches this by comparing the
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// read result to null.
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#import "modules/std.sx";
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#import "modules/std/mem.sx";
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#import "modules/ffi/objc.sx";
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#import "modules/build.sx";
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SxWeakTarget :: #objc_class("SxWeakTarget") {
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#extends NSObject;
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tag: i32;
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alloc :: () -> *SxWeakTarget;
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}
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SxWeakHolder :: #objc_class("SxWeakHolder") {
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#extends NSObject;
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target: *SxWeakTarget #property(weak);
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alloc :: () -> *SxWeakHolder;
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}
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main :: () -> i32 {
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inline if OS == .macos {
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gpa := GPA.init();
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tracker := TrackingAllocator.init(xx gpa);
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push Context.{ allocator = xx tracker, data = null } {
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holder := SxWeakHolder.alloc();
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target := SxWeakTarget.alloc();
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holder.target = target;
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target.release();
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// After release: target's refcount → 0 → target deallocates.
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// With weak: holder.target should read as null (auto-niled).
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// Without weak: holder.target reads as the stale pointer.
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read_back := holder.target;
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if read_back != null {
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print("FAIL: weak property didn't auto-nil after target dealloc\n");
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return 1;
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}
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holder.release();
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}
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print("weak property: ok\n");
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}
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inline if OS != .macos {
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print("skipped (not macos)\n");
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}
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0
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}
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