239e7df27c
Properties on sx-defined #objc_class declarations now synthesize
getter (always) and setter (unless 'readonly') IMPs that GEP into
the hidden state struct and load / store the corresponding field.
The state struct already holds every user-declared field
(objcDefinedStateStructType), so no new layout work — the IMPs
just dispatch a struct_gep + load/store through the __sx_state
ivar.
For each '#property' field on a sx-defined class:
Getter '__<Cls>_<field>_imp(self, _cmd) -> T':
state = object_getIvar(self, load(__<Cls>_state_ivar))
return state.<field>
Setter '__<Cls>_set<Field>_imp(self, _cmd, val) -> void':
state = object_getIvar(self, load(__<Cls>_state_ivar))
state.<field> = val
Both IMPs land in the cache's methods slice (mirroring the
method-IMP wiring from M1.2 A.4b.iii) so emit_llvm's
class_addMethod loop registers them on the class without
special-casing. Selector mangling:
getter: <field> (e.g. 'width')
setter: set<Field>: (e.g. 'setWidth:')
Type encoding derived from the field's resolved IR TypeId.
'readonly' (the only modifier honored in this slice) skips the
setter emission AND the corresponding method entry — so the
runtime reports the selector as absent. Other modifiers
(strong, weak, copy, assign) parse fine but stay no-ops until
M4.2 wires up ARC ops in the setter body.
152-objc-property-sx-defined.sx round-trips on macOS:
b.width = 10; b.height = 7;
read back through getter IMPs.
area is readonly — class_getInstanceMethod(SxBox, sel(setArea:))
returns NULL, confirming the setter is absent.
182 example tests pass (+1). zig build test green.
73 lines
2.1 KiB
Plaintext
73 lines
2.1 KiB
Plaintext
// M2.2 second pass — `#property` on sx-defined `#objc_class`
|
|
// synthesizes getter/setter IMPs that read/write the hidden
|
|
// state struct.
|
|
//
|
|
// User writes:
|
|
// field: T #property[(modifiers)];
|
|
//
|
|
// Compiler emits:
|
|
// __<Cls>_<field>_imp(self, _cmd) -> T // load state.field
|
|
// __<Cls>_set<Field>_imp(self, _cmd, v) -> void // store state.field
|
|
// (setter skipped for `readonly`.)
|
|
//
|
|
// Both register on the class via class_addMethod with auto-derived
|
|
// selectors and type encodings.
|
|
//
|
|
// Verifies dispatch through the real Obj-C runtime by direct
|
|
// objc_msgSend — round-trips a primitive property and confirms
|
|
// `readonly` skips setter registration.
|
|
|
|
#import "modules/std.sx";
|
|
#import "modules/compiler.sx";
|
|
#import "modules/std/objc.sx";
|
|
|
|
class_getInstanceMethod :: (cls: *void, sel: *void) -> *void #foreign objc;
|
|
|
|
SxBox :: #objc_class("SxBox") {
|
|
width: s32 #property;
|
|
height: s32 #property;
|
|
area: s32 #property(readonly); // setter omitted
|
|
|
|
alloc :: () -> *SxBox;
|
|
init :: (self: *SxBox) -> *SxBox;
|
|
}
|
|
|
|
main :: () -> s32 {
|
|
inline if OS == .macos {
|
|
b := SxBox.alloc().init();
|
|
|
|
// width / height round-trip through synthesized IMPs.
|
|
b.width = 10;
|
|
b.height = 7;
|
|
w := b.width;
|
|
h := b.height;
|
|
if w != 10 or h != 7 {
|
|
print("FAIL: width/height round-trip\n");
|
|
return 1;
|
|
}
|
|
|
|
// `area` is readonly — getter registered, setter NOT.
|
|
// area starts at 0 (state zero-init); read works:
|
|
a := b.area;
|
|
if a != 0 {
|
|
print("FAIL: area expected 0, got {}\n", a);
|
|
return 1;
|
|
}
|
|
|
|
// Confirm the setter selector is absent on the class.
|
|
cls : Class = objc_getClass("SxBox".ptr);
|
|
sel_set_area : SEL = sel_registerName("setArea:".ptr);
|
|
m := class_getInstanceMethod(cls, sel_set_area);
|
|
if m != null {
|
|
print("FAIL: setArea: should not be registered (readonly)\n");
|
|
return 1;
|
|
}
|
|
|
|
print("property: w={} h={} area={}\n", w, h, a);
|
|
}
|
|
inline if OS != .macos {
|
|
print("property: w=10 h=7 area=0\n");
|
|
}
|
|
0;
|
|
}
|