Files
sx/examples/1208-ffi-closure-capture.sx
agra 12bf61a9fc std: restructure step 3 — ffi/ moves, build.sx, math dir spelling, fixtures
- objc.sx, objc_block.sx (from std/) + sdl3/opengl/raylib/stb/stb_truetype/
  wasm vendor bindings (from modules/ root) -> modules/ffi/
- std/uikit.sx deleted: platform/uikit.sx already declares UIApplicationMain
  and imports objc; '#framework "UIKit"' cannot live in a file imported on
  macOS targets (unconditional link directive, UIKit is iOS-only), so the
  three iOS-only examples carry the 3-line glue inline. 1607/1608/1616 also
  un-rotted (dead ns_string -> 'xx "..."' Into conversions, callconv(.c)
  msgSend fn-ptrs) — all three build for ios-sim/ios again.
- math/math.sx -> math/scalar.sx; one spelling '#import "modules/math"'
  everywhere (4 pinned IR snapshots regenerated: dir import adds Vec2/Mat4
  to the type tables).
- compiler.sx -> build.sx (imports, CLAUDE.md bundling table, specs.md).
- testpkg/ + test_c.sx -> tests/fixtures/ (resolve CWD-relative from repo
  root, same as vendors/).
- library-internal imports use full modules/... paths (std.sx tail,
  platform/bundle.sx, fixtures).
2026-06-11 08:37:22 +03:00

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// Closure free-variable capture works through `FfiIntrinsicCall`
// nodes — names referenced inside `#objc_call` / `#jni_call` /
// `#jni_static_call` argument lists from inside a closure body are
// recognized as captured variables and bound from the closure's env
// struct at call time. `passthrough_works` is the baseline (normal
// expression capture); `passthrough_via_objc_call` exercises the same
// capture through an FFI intrinsic call's arg list.
#import "modules/std.sx";
#import "modules/build.sx";
#import "modules/ffi/objc.sx";
passthrough_works :: (recv: *void) -> Closure(s32) -> *void {
closure((d: s32) -> *void => recv) // captures `recv` — fine
}
passthrough_via_objc_call :: (recv: *void) -> Closure(s32) -> s64 {
// Same `recv` capture, but inside `#objc_call(...)`'s arg list.
closure((d: s32) -> s64 => #objc_call(s64)(recv, "hash"))
}
main :: () -> s32 {
inline if OS == .macos {
f := passthrough_works(null);
p := f(0);
print("ok (passthrough works) = {}\n", p == null);
// Capture inside the `#objc_call` arg list.
ns_object := objc_getClass("NSObject".ptr);
g := passthrough_via_objc_call(ns_object);
h := g(0);
print("ok (passthrough via #objc_call) = {}\n", h != 0);
}
inline if OS != .macos {
print("skipped (not macos)\n");
}
0
}