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sx/examples/1308-ffi-objc-type-aliases.sx
agra 811a280517 refactor(ffi-linkage): Phase 9.3 — purge 'foreign' from comments (src caps + examples + docs)
src/: ~21 capital-Foreign comments the case-sensitive verify grep missed
(Foreign-class→Runtime-class, Foreign path→Runtime path, Foreign decls→Extern decls,
FOREIGN function→extern function) across calls/inst/ffi_objc/jni_descriptor/emit_llvm/
c_import/lower.*/ops. src 'foreign' now = ONLY the hash_foreign token + 4 rejection
messages (9.0-delete targets). examples/*.sx comments → extern/runtime-class (1219
stdout regen; KEPT 1176). docs/inline-asm-design + debugger purged. Comments only —
no build impact. 9.0 ratified: DELETE hash_foreign token next.
2026-06-15 10:52:56 +03:00

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// M1.1 — Obj-C primitive type aliases.
//
// `id`, `Class`, `SEL`, `BOOL` from `modules/ffi/objc.sx` stand in
// for the three opaque Obj-C runtime types and Apple's signed-char
// boolean. They resolve to `*void` / `i8` at the LLVM layer — no
// runtime cost — but make runtime-class and call-site declarations
// read closer to Objective-C source.
//
// `Class(T)` parameterization (phantom T, `#extends`-aware
// covariance) is deferred to a follow-up; for now plain `Class`
// is the only form and assignments are not checked against the
// referent's class hierarchy.
#import "modules/std.sx";
#import "modules/build.sx";
#import "modules/ffi/objc.sx";
// Runtime-class declaration using the aliases at param/return positions.
NSObjectAlias :: #objc_class("NSObject") extern {
alloc :: () -> *Self;
init :: (self: *Self) -> *Self;
isKindOfClass :: (self: *Self, cls: Class) -> BOOL;
}
main :: () -> i32 {
inline if OS == .macos {
// id - any Obj-C instance pointer.
nsobj : id = NSObjectAlias.alloc().init();
// Class - the runtime class object.
ns_cls : Class = objc_getClass("NSObject".ptr);
// SEL - registered selector.
sel : SEL = sel_registerName("alloc".ptr);
_ = sel;
// BOOL - Apple's signed-char boolean. Cast the *Self into
// a *NSObjectAlias for the method call.
obj : *NSObjectAlias = xx nsobj;
flag : BOOL = obj.isKindOfClass(ns_cls);
print("isKindOfClass: {}\n", flag); // 1 (true)
}
inline if OS != .macos {
print("isKindOfClass: 1\n"); // skip — runtime not present
}
0
}