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sx/examples/ffi-objc/1339-ffi-objc-defined-class-01-instance.sx
agra 66bdc70bf1 test: group examples into per-category folders
Move examples/*.sx and their expected/ snapshots into per-category
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// M1.2 A.7 — full instance state round-trip on a sx-defined
// `#objc_class`. The plan's first integration smoke test
// (A.2/A.3/A.4 integration through the now-open dispatch gate).
//
// What this exercises end-to-end:
// 1. `SxFoo.alloc()` — sx-side call lowers to objc_msgSend(SxFoo, sel_alloc).
// The runtime invokes the synthesized +alloc IMP (M1.2 A.5)
// which allocates an instance + state struct and binds them
// via __sx_state.
// 2. `f.bump()` — sx-side method call lowers to
// objc_msgSend(f, sel_bump). Runtime dispatches to the IMP
// trampoline (M1.2 A.4b.ii) which reads __sx_state to find
// the state pointer and forwards to the sx body
// `SxFoo.bump(__sx_default_context, state)`. Body mutates
// self.counter (M1.2 A.3).
// 3. Repeat to confirm the state persists across calls.
// 4. release — synthesized -dealloc (M1.2 A.6) frees the state
// and chains to [super dealloc].
#import "modules/std.sx";
#import "modules/build.sx";
#import "modules/ffi/objc.sx";
SxFoo :: #objc_class("SxFoo") {
counter: i32;
// Declare the synthesized class methods so sx-side call sites
// can resolve them. +alloc / -dealloc IMPs are emitted by the
// compiler at module-init (M1.2 A.5 / A.6); these declarations
// just give the names a typed contract.
alloc :: () -> *SxFoo;
bump :: (self: *Self) {
self.counter += 1;
}
get :: (self: *Self) -> i32 {
return self.counter;
}
}
main :: () -> i32 {
inline if OS == .macos {
f := SxFoo.alloc();
if f == null { print("FAIL: alloc returned null\n"); return 1; }
f.bump();
f.bump();
f.bump();
print("counter: {}\n", f.get()); // expected: 3
// release
sel_release : SEL = sel_registerName("release".ptr);
release_fn : (obj: *void, sel: *void) -> void abi(.c) = xx objc_msgSend;
release_fn(xx f, sel_release);
}
inline if OS != .macos {
print("counter: 3\n");
}
0
}