Files
sx/examples/62-objc-class.sx
agra 1c32d54e01 ios + ir cleanup
- ios: --target ios/ios-sim shorthands, iOS SDK auto-discovery,
  #framework directive + BuildOptions.add_framework hook,
  .app bundle + Info.plist + codesign (ad-hoc and real),
  --codesign-identity/--provisioning-profile/--entitlements flags,
  modules/std/{objc,uikit}.sx, dynamic class registration,
  typed objc_msgSend cast pattern, UIApplicationMain handoff,
  UIWindow scene attach. Runs on iPhone hardware.
- ir: silent .s64 defaults → loud diagnostics,
  resolveReturnType infers from body, sub-byte int sizes match LLVM,
  tuple type interning includes names, compile errors exit 1
- issue-NNNN convention: resolved bugs rename to focused features
- 50 regression tests passing
2026-05-17 13:19:08 +03:00

42 lines
1.5 KiB
Plaintext

// Register a brand-new Obj-C class from sx and prove a sx-defined method
// actually runs when dispatched through `objc_msgSend`.
//
// The flow:
// 1. `objc_allocateClassPair(NSObject, "SxThing", 0)` returns an unregistered Class.
// 2. `class_addMethod(cls, sel_hello, IMP, "v@:")` attaches our sx function as
// the `hello` method (type encoding "v@:" = void method(id self, SEL _cmd)).
// 3. `objc_registerClassPair(cls)` finalizes it.
// 4. `class_createInstance(cls, 0)` returns an `id` for a fresh instance.
// 5. typed-cast `objc_msgSend` for `void (id, SEL)` and dispatch `hello`.
// If the IMP ran, the global `g_marker` is non-zero and we return it as exit.
#import "modules/std.sx";
#import "modules/std/objc.sx";
g_marker : s32 = 0;
// IMP for `hello`. Must use C calling convention so `self` and `_cmd` land in
// x0 and x1 the way the Obj-C runtime expects.
hello_imp :: (self: *void, _cmd: *void) callconv(.c) {
g_marker = 42;
}
main :: () -> s32 {
NSObject := objc_getClass("NSObject".ptr);
SxThing := objc_allocateClassPair(NSObject, "SxThing".ptr, 0);
sel_hello := sel_registerName("hello".ptr);
ok := class_addMethod(SxThing, sel_hello, xx hello_imp, "v@:".ptr);
if !ok { return 1; }
objc_registerClassPair(SxThing);
obj := class_createInstance(SxThing, 0);
if obj == xx 0 { return 2; }
// [obj hello]
msg : (*void, *void) -> void = xx objc_msgSend;
msg(obj, sel_hello);
return g_marker; // 42 if hello_imp ran
}