Files
sx/examples/1311-ffi-objc-class-ivar-registration.sx
agra d8076b9333 lang: rename signed integer types sN -> iN
Surface rename of the signed integer family: s1..s64 become i1..i64
(u1..u64, usize, isize unchanged). 'string' keeps the s-prefix arm in
name classification; width parsing moves to the i-prefix arm next to
isize.

Internal TypeId tags follow the surface (.s8/.s16/.s32/.s64 ->
.i8/.i16/.i32/.i64), as do mono-key mangle fragments (ptr_i64,
tu_i64_bool) and all display/diagnostic formatting (i{d}).

Migrated in the same sweep: stdlib + examples + issue repros + FFI C
companions (shared symbol names like ffi_id_i64), expected
stdout/stderr/ir snapshots, specs.md, readme.md, CLAUDE.md/AGENTS.md,
implementation_plan.md, docs/, issue writeups. Vendored stb_image and
historical flow state left untouched.

zig build test: 426/426; examples suite: 595/595.
2026-06-12 09:31:53 +03:00

52 lines
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// M1.2 A.4b.i — '__sx_state' ivar registration on sx-defined
// '#objc_class'.
//
// Class-pair init now:
// 1. allocs the class pair
// 2. registers a single '__sx_state : *void' ivar
// 3. finalises the class
// 4. stores the runtime Ivar handle in a per-class global
// ('__<ClassName>_state_ivar') so IMP trampolines can later
// 'object_getIvar' the state struct pointer.
//
// Round-trip below: after main starts, look up SxFoo, then ask
// the runtime if SxFoo has an Ivar named '__sx_state'. Returns
// non-null iff registration succeeded.
//
// IMP trampolines (A.4b.ii) and the '+alloc' / '-dealloc'
// overrides (A.5 / A.6) come next.
#import "modules/std.sx";
#import "modules/build.sx";
#import "modules/ffi/objc.sx";
class_getInstanceVariable :: (cls: *void, name: [*]u8) -> *void #foreign objc;
SxFoo :: #objc_class("SxFoo") {
counter: i32;
bump :: (self: *Self) {
self.counter += 1;
}
}
main :: () -> i32 {
inline if OS == .macos {
cls : Class = objc_getClass("SxFoo".ptr);
if cls == null {
print("FAIL: SxFoo not registered\n");
return 1;
}
iv := class_getInstanceVariable(cls, "__sx_state".ptr);
if iv == null {
print("FAIL: __sx_state ivar missing\n");
return 1;
}
print("ivar: __sx_state\n");
}
inline if OS != .macos {
print("ivar: __sx_state\n");
}
0
}