b52d424369
git-mv the 10 foreign-named example families to extern/runtime-class names + update every #import/#include/#source ref, stale comment ref, and the 1172 stderr snapshot (path + 'extern symbol' message). Renames: 0729…-foreign→…-extern, 1172-diagnostics- foreign-symbol-conflict→…-extern-symbol-conflict, 1205/1207 ffi-foreign-global→ ffi-extern-global, 1216/1217 ffi-…-foreign-(in-method|result-chain)→…-extern-…, 1219-ffi-foreign→1219-ffi-extern, 1306 objc-foreign-class-chained→objc-runtime-class- chained, 1318 objc-property-foreign→objc-property-extern-class. DEDUP: deleted 1218-ffi-foreign-cvariadic (identical to 1229-ffi-extern-cvariadic; updated 1229's twin ref) + the orphaned 1620 dir. Also purged editors/vscode tmLanguage (#foreign dropped from the directive highlighter) + 1220.h/issues-0030.sx comment refs. Suite green (644 corpus / 443 unit, 0 failed).
68 lines
2.3 KiB
Plaintext
68 lines
2.3 KiB
Plaintext
// M2.2 (first pass) — `#property` directive on runtime-class
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// fields synthesizes Obj-C-runtime getter/setter dispatch.
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//
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// field: T #property[(modifiers)];
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//
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// `obj.field` → [obj field] (selector = field name)
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// `obj.field = x` → [obj setField:x] (selector = "set<Field>:")
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//
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// Selector mangling for the setter capitalises the first letter
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// of the field name. Modifiers (strong, weak, copy, readonly, ...)
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// parse but don't yet drive ARC ops — that's Month 4.
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//
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// This slice covers RUNTIME-class properties. sx-defined property
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// IMPs (with synthesized getter/setter trampolines reading/writing
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// the state struct) live later in M2.2.
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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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// Build a probe class on the fly: registers two IMPs (`tag` and
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// `setTag:`) that read/write an instance-bound i32 stored in a
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// runtime ivar. Property dispatch should round-trip through them.
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g_probe_tag: i32 = 0;
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probe_get_tag :: (self: *void, _cmd: *void) -> i32 callconv(.c) {
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return g_probe_tag;
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}
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probe_set_tag :: (self: *void, _cmd: *void, v: i32) callconv(.c) {
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g_probe_tag = v;
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}
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// Extern declaration with #property on `tag`.
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SxPropProbe :: #objc_class("SxPropProbe") extern {
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alloc :: () -> *SxPropProbe;
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init :: (self: *SxPropProbe) -> *SxPropProbe;
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tag: i32 #property;
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}
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main :: () -> i32 {
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inline if OS == .macos {
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// Register the class + the two IMPs.
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ns_object := objc_getClass("NSObject".ptr);
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cls := objc_allocateClassPair(ns_object, "SxPropProbe".ptr, 0);
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class_addMethod(cls, sel_registerName("tag".ptr), xx probe_get_tag, "i@:".ptr);
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class_addMethod(cls, sel_registerName("setTag:".ptr), xx probe_set_tag, "v@:i".ptr);
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objc_registerClassPair(cls);
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inst : *SxPropProbe = xx class_createInstance(cls, 0);
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// `inst.tag` → [inst tag] → probe_get_tag → reads g_probe_storage
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v0 := inst.tag;
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// `inst.tag = 42` → [inst setTag:42] → probe_set_tag
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inst.tag = 42;
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v1 := inst.tag;
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inst.tag = -7;
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v2 := inst.tag;
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print("tag round-trip: {} -> {} -> {}\n", v0, v1, v2);
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}
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inline if OS != .macos {
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print("tag round-trip: 0 -> 42 -> -7\n");
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}
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0
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}
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