8406cc1fed
Implementation half of the Phase 3.1 cadence step. `lowerForeignStaticCall` for `#objc_class` / `#objc_protocol` runtimes no longer bails; it routes through a new `lowerObjcStaticCall` helper that loads the class object from a module-scoped cached slot (populated once per module via `objc_getClass`) and dispatches `objc_msg_send` with the same selector-mangling as Phase 3.0's instance dispatch. Three pieces: 1. `Module.objc_class_cache` — parallel to `objc_selector_cache`, insertion-ordered list of (class_name, slot_GlobalId) so the constructor that calls `objc_getClass` per slot at module load is deterministic. `lookupObjcClass` / `appendObjcClass` accessors. 2. `internObjcClassObject` in lower.zig — get-or-create a `OBJC_CLASSLIST_REFERENCES_<Cls>` global pointer; matches clang's naming convention. `lowerObjcStaticCall` reuses `deriveObjcSelector` from 3.0 for the selector, loads the class slot, and emits `objc_msg_send(class_obj, sel, args)`. 3. `emitObjcClassInit` in emit_llvm.zig — companion to `emitObjcSelectorInit`. Walks `objc_class_cache`, synthesizes a constructor `__sx_objc_class_init` that calls `objc_getClass(name)` per slot, registers in `@llvm.global_ctors` for AOT (extending the existing array if the selector init already created it), and injects a direct call into main's prelude after any prior init calls so the ORC JIT path runs it too. Surface form is `.` (`NSObject.class()`) matching JNI's `Alias.new(...)` convention rather than the plan's notional `::` — avoids extending the parser for a new postfix operator with no other use case. Test `examples/ffi-objc-dsl-05-static.sx` exercises NSObject's `+class` and `+description` class methods via the new syntax, asserts both return non-null. NSObject is always available at module-load, unlike runtime-created test classes that wouldn't exist yet when the class-init constructor runs. 164/164 tests; chess builds + runs clean on all three platforms.
43 lines
1.5 KiB
Plaintext
43 lines
1.5 KiB
Plaintext
// Phase 3 step 3.1 (PLAN-FFI.md): static call `Cls.class_method(args)`
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// on an `#objc_class` alias lowers to `objc_msg_send` against the class
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// object (loaded once per module via `objc_getClass` and cached). The
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// selector is derived by the same default mangling as Phase 3.0
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// (`stringWithUTF8String_(s)` → "stringWithUTF8String:").
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//
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// Mirrors JNI's static-dispatch surface (`Alias.new(...)` etc.); the
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// lowering disambiguates static vs instance by looking at
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// `method.is_static` on the foreign-class member.
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//
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// Uses NSObject because the cached class slot is populated by a
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// constructor at module-load — runtime-created test classes wouldn't
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// exist yet when `objc_getClass` runs. NSObject is always available
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// on macOS via libobjc.
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#import "modules/std.sx";
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#import "modules/compiler.sx";
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NSObject :: #foreign #objc_class("NSObject") {
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// `+(Class)class` — niladic, name verbatim, selector = "class".
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// Returns the class object itself.
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static class :: () -> *void;
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// `+(NSString *)description` on the class returns a description
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// string. Niladic, selector = "description".
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static description :: () -> *void;
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}
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main :: () -> s32 {
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inline if OS == .macos {
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c := NSObject.class();
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if c != null {
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print("class non-null\n");
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}
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d := NSObject.description();
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if d != null {
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print("description non-null\n");
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}
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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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