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.
29 lines
1.0 KiB
Plaintext
29 lines
1.0 KiB
Plaintext
// Obj-C runtime FFI smoke test: round-trip a string through NSString.
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//
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// Demonstrates the typed-fn-pointer cast idiom for `objc_msgSend`. Each
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// shape we invoke gets its own variable typed with the exact ABI:
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//
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// msg_3 : (*void, *void, [*]u8) -> *void = xx objc_msgSend;
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// msg_2 : (*void, *void) -> [*]u8 = xx objc_msgSend;
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//
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// On ARM64 Apple, objc_msgSend doesn't take a varargs path — invoking it
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// through a typed fn-pointer is the only correct way to land args in the
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// right registers.
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#import "modules/std.sx";
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#import "modules/ffi/objc.sx";
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main :: () -> i32 {
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ns_class := objc_getClass("NSString".ptr);
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sel_with_utf8 := sel_registerName("stringWithUTF8String:".ptr);
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sel_utf8 := sel_registerName("UTF8String".ptr);
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msg_3 : (*void, *void, [*]u8) -> *void abi(.c) = xx objc_msgSend;
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ns_str := msg_3(ns_class, sel_with_utf8, "hi".ptr);
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msg_2 : (*void, *void) -> [*]u8 abi(.c) = xx objc_msgSend;
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back := msg_2(ns_str, sel_utf8);
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return xx (back[0] + back[1]); // 'h' + 'i' = 104 + 105 = 209
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}
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