c39c8e15eb
Bodied methods without a '*Self' first param (parser marks
is_static=true) are now registered as Obj-C CLASS methods on
the metaclass.
Each such method gets:
- A synthesized FnDecl + body lowering through the existing
M1.2 A.2 path.
- A C-ABI trampoline 'emitObjcDefinedClassStaticImp' — same
shape as the instance trampoline but skips the __sx_state
ivar read (no instance state) and passes only
'__sx_default_context' (plus user args) to the sx body.
- An entry in ObjcDefinedMethodEntry with 'is_class=true'.
emit_llvm's class-pair init constructor now computes the
metaclass once up-front (via object_getClass(cls)) and shares
it between the +alloc IMP registration (M1.2 A.5) and the
M2.1(b) class-method registrations. The per-method registration
loop picks the target via 'method.is_class ? metaclass : cls'.
149-objc-class-method-static-imp.sx end-to-end on macOS:
SxFoo :: #objc_class("SxFoo") {
answer :: () -> s32 { return 42; }
}
// [SxFoo answer] via objc_msgSend → 42
// class_getClassMethod(SxFoo, sel_answer) → non-null
Still TODO for M2.1: the (a) class-LEVEL constant form
'layerClass :: Class = CAEAGLLayer.class();' — needs parser
extension to recognize 'name :: Type = expr;' inside #objc_class
blocks, plus lazy-init-slot synthesis.
179 example tests pass (+1). zig build test green.
49 lines
1.6 KiB
Plaintext
49 lines
1.6 KiB
Plaintext
// M2.1(b) — class methods (no `*Self` first param) on a
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// sx-defined `#objc_class`.
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//
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// The user declares a method without `self: *Self`. The compiler
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// recognises it as a class method (is_static), synthesizes a C-ABI
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// trampoline that calls the sx body, and registers the IMP on the
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// METACLASS (where Obj-C class methods live).
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//
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// Verifies the runtime side:
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// 1. class_getClassMethod(SxFoo, sel) returns non-null — proves
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// the IMP is on the metaclass.
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// 2. objc_msgSend(SxFoo, sel) invokes the IMP and returns the
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// sx body's result.
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#import "modules/std.sx";
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#import "modules/compiler.sx";
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#import "modules/std/objc.sx";
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class_getClassMethod :: (cls: *void, sel: *void) -> *void #foreign objc;
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SxFoo :: #objc_class("SxFoo") {
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counter: s32;
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// Class method — no `self`. Returns 42.
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answer :: () -> s32 { return 42; }
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}
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main :: () -> s32 {
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inline if OS == .macos {
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cls : Class = objc_getClass("SxFoo".ptr);
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if cls == null { print("FAIL: SxFoo not registered\n"); return 1; }
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sel_answer : SEL = sel_registerName("answer".ptr);
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method : *void = class_getClassMethod(cls, sel_answer);
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if method == null { print("FAIL: class method not on metaclass\n"); return 1; }
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// Invoke via objc_msgSend: [SxFoo answer] → 42.
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msg_fn : (cls: *void, sel: *void) -> s32 callconv(.c) = xx objc_msgSend;
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result : s32 = msg_fn(cls, sel_answer);
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if result != 42 { print("FAIL: expected 42, got {}\n", result); return 1; }
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print("class method: {}\n", result);
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}
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inline if OS != .macos {
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print("class method: 42\n");
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}
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0;
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}
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