95f13849af
Adds:
field: T #property[(modifier, modifier, ...)];
inside #objc_class declarations. For FOREIGN classes (this slice),
'obj.field' and 'obj.field = x' lower as objc_msgSend dispatches —
no struct GEP, no per-field storage on the sx side. The receiver
is opaque and the Obj-C runtime owns the data.
Selector mangling (Apple convention):
getter: <fieldName> (e.g. 'count')
setter: set<FieldName>: (e.g. 'setBackgroundColor:')
So:
view.backgroundColor → [view backgroundColor]
view.backgroundColor = red → [view setBackgroundColor:red]
Plumbing:
- New token hash_property + lexer entry + LSP keyword classification.
- ForeignFieldDecl gains 'is_property' + 'property_modifiers' slice;
the parser captures both. Modifiers are recorded verbatim (strong,
weak, copy, readonly, getter("name"), ...) — semantic interpretation
lands with M4.2 ARC wiring.
- lowerFieldAccess: lookupObjcPropertyOnPointer() detects the case
before the auto-deref / struct-GEP path and dispatches via
lowerObjcPropertyGetter (objc_msg_send).
- lowerAssignment: same check on the field_access LHS routes to
lowerObjcPropertySetter (objc_msg_send with set<Field>:).
- inferExprType: 'obj.field' returns the property's declared type
so chained access / coerced assignment work.
151-objc-property-foreign.sx round-trips:
inst.tag → [inst tag] → reads g_probe_tag → 0
inst.tag = 42 → [inst setTag:42] → writes g_probe_tag
inst.tag = -7 → ditto
Final: 0 -> 42 -> -7 (real Obj-C runtime dispatch).
DEFERRED for M2.2 (later passes):
- Sx-defined property IMPs (synthesized getter/setter trampolines
reading/writing the state struct).
- Modifier-driven setter behavior: readonly (compile error on
write), copy (deep-copy), weak (objc_storeWeak), strong/assign
(Month 4.2 ARC ops).
- getter("name") / setter("name:") selector overrides.
181 example tests pass (+1). zig build test green.
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