66bdc70bf1
Move examples/*.sx and their expected/ snapshots into per-category subfolders (examples/<category>/...). Folder = leading filename token, with ffi-objc/ffi-jni kept whole; filenames are unchanged. The corpus runner and LSP sweep now discover each category's expected/ dir, while issues/ stays flat. Example 1058's repo-root-relative companion import is made file-relative. Path strings embedded in 164 snapshots were regenerated (path-only changes). Test-layout docs in CLAUDE.md updated.
53 lines
2.1 KiB
Plaintext
53 lines
2.1 KiB
Plaintext
// Phase 1 step 1.8 (PLAN-FFI.md): >16 B non-HFA struct returns
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// through `#objc_call`. AAPCS64 routes these through the indirect-
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// return convention: caller allocates the result slot, passes its
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// pointer in x8 with the `sret(<T>)` attribute, callee writes
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// through it and returns void.
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//
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// Register a runtime-built Obj-C class with a method that returns
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// a fixed `Triple`. The IMP is a plain sx fn (abi .c) — its
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// sret-shaped lowering already works (Phase 0.3 fix for plain
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// `extern` returns). The `#objc_call` dispatch side now produces
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// the matching call shape: `call void @objc_msgSend(ptr sret %slot,
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// ...)` + load. The two halves must agree on the ABI for the
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// round-trip to return the right bytes.
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#import "modules/std.sx";
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#import "modules/build.sx";
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#import "modules/ffi/objc.sx";
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Triple :: struct { a: i64; b: i64; c: i64; }
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// IMP for the runtime-installed method. Obj-C convention: implicit
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// (self, _cmd) prefix, then declared args. Returns the value bytes.
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triple_imp :: (self: *void, _cmd: *void) -> Triple abi(.c) {
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Triple.{ a = 11, b = 22, c = 33 }
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}
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main :: () -> i32 {
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inline if OS == .macos {
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// Build the class:
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// @interface SxTripleProbe : NSObject
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// - (Triple)tripleValue;
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// @end
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ns_object := objc_getClass("NSObject".ptr);
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my_cls := objc_allocateClassPair(ns_object, "SxTripleProbe".ptr, 0);
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sel := sel_registerName("tripleValue".ptr);
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// Type encoding: {Triple=qqq}@: → returns 24 B struct of 3 i64,
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// implicit (self: id, _cmd: SEL).
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ok := class_addMethod(my_cls, sel, xx triple_imp, "{Triple=qqq}@:".ptr);
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print("addMethod = {}\n", ok);
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objc_registerClassPair(my_cls);
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// Call through #objc_call — sret transform applies because
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// Triple is 24 B non-HFA.
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instance := class_createInstance(my_cls, 0);
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t := #objc_call(Triple)(instance, "tripleValue");
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print("triple = ({}, {}, {})\n", t.a, t.b, t.c);
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}
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inline if OS != .macos {
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print("skipped (not macos)\n");
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}
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0
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}
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