agra
2b717d9b38
ffi: resolve foreign-class member types through Self substitution (issue-0043)
...
`inferExprType` for a chained call `Cls.static().instance(...)` never
looked the inner call's foreign-class declaration up, so the outer
dispatch saw a `.s64` receiver, the `foreign_class_map.get(...)` lookup
missed, and lowering emitted `error: unresolved 'method'`. The macOS
target appeared to work because `inline if OS == .ios { ... }` strips
the gated body before lowering — eliding every call that would have
exercised the broken path.
The "lazy-lower" framing in the original issue file was a red herring.
Fix in `src/ir/lower.zig`:
1. `inferExprType` for `.call` with `.field_access` callee now checks
`foreign_class_map` for both shapes — `Cls.static_method(args)` (object
identifier matches a foreign-class alias, look up static members) and
`inst.instance_method(args)` (receiver is a pointer to a foreign-class
struct, look up non-static members).
2. New helpers `resolveForeignMethodReturnType` and
`resolveForeignClassMemberType` substitute `*Self` / `Self` to the
foreign-class struct so a `*Self` return doesn't synthesize a phantom
`Self`-named struct that future dispatches can't resolve.
3. The Obj-C lowering paths (`lowerObjcMethodCall`, `lowerObjcStaticCall`)
route through the same helper for `ret_ty` so the IR Ref's type matches
what `inferExprType` reports.
Regression test at `examples/138-foreign-class-chained-dispatch.sx`
exercises NSObject's `+alloc` / `-init` chain in both shapes —
`*NSObject` return then `*Self` return, and `*Self` then `*Self`. Runs
on the host (macOS) for live exercise; non-macOS hosts fall through to
a stub matching the expected output.
This unblocks Phase 3.2 C4/C5 — the `UIWindow.alloc().initWithWindowScene(scene)`
pattern that surfaced the bug is the cluster's bread-and-butter shape.
167/167 example tests; chess builds clean on macOS, iOS-sim, Android.
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