Files
sx/examples/1340-ffi-objc-defined-class-02-struct-encoding.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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// M1.2 A.1 follow-up — pass-by-value struct args/returns in
// sx-defined `#objc_class` methods.
//
// Wires the new `{Name=field0field1...}` arm of
// `appendObjcEncoding` into `class_addMethod` registration. Without
// it, methods that take or return a value-type struct (CGPoint,
// CGSize, NSRange shapes) used to fail signature-encoding
// derivation with a "type kind not yet supported" diagnostic.
//
// Each sx-defined method registered with the Obj-C runtime needs an
// encoding string built from its IR signature. For
// `goto :: (self: *Self, p: Point)` that string is `v@:{Point=dd}`
// — return void, receiver `@`, selector `:`, then the struct
// argument `{Point=dd}`.
//
// We don't observe the encoding string directly here (it ends up in
// a private OBJC_METH_VAR_TYPE_ cstring in the linked binary) — but
// the compiler bails LOUDLY on unsupported types per the project's
// REJECTED PATTERNS rule, so a successful build is the encoding
// going through cleanly.
#import "modules/std.sx";
#import "modules/build.sx";
#import "modules/ffi/objc.sx";
Point :: struct {
x: f64;
y: f64;
}
SxMover :: #objc_class("SxMover") {
pos: Point;
alloc :: () -> *SxMover;
goto :: (self: *Self, p: Point) {
self.pos = p;
}
here :: (self: *Self) -> Point {
return self.pos;
}
}
main :: () -> s32 {
inline if OS == .macos {
m := SxMover.alloc();
if m == null { print("FAIL: alloc returned null\n"); return 1; }
m.goto(Point.{ x = 7.5, y = 8.25 });
p := m.here();
print("at: ({}, {})\n", p.x, p.y); // expected: at: (7.500000, 8.250000)
sel_release : SEL = sel_registerName("release".ptr);
release_fn : (obj: *void, sel: *void) -> void callconv(.c) = xx objc_msgSend;
release_fn(xx m, sel_release);
}
inline if OS != .macos {
print("at: (7.500000, 8.250000)\n");
}
0
}