e604868ffb
`xs[i].get()` on a parameterised `..xs: Box(T)` pack now resolves — the canonical `ValueListenable` shape. registerParamImpl, for a CONCRETE-struct source, now also registers the impl's methods as `<Source>.<method>` in fn_ast_map (like a non-parameterised impl), so UFCS finds them. Such methods are already fully concrete (`impl Box(s64) for IntCell` → `get(self: *IntCell) -> s64`), so there's nothing to monomorphize; generic/pack sources stay lazy in param_impl_map. First impl wins on a name collision. Heterogeneous parameterised packs work: each `xs[i]` binds a different T and dispatches to its own impl. Regression: examples/194-protocol-pack-parameterized.sx (Box(s64) IntCell + Box(string) StrCell, order-independent).
31 lines
1.1 KiB
Plaintext
31 lines
1.1 KiB
Plaintext
// Feature 1 — method calls on a PARAMETERIZED protocol pack (the canonical
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// shape: `..xs: ValueListenable` where each element conforms with its own
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// type-arg). Calling the protocol method `get()` on `xs[i]` resolves to the
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// concrete element's impl, even though each element binds a different `T`.
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//
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// (Parameterised-protocol impl methods with a concrete source type are now
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// registered as `<Source>.<method>`, so UFCS — and thus `xs[i].get()` —
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// resolves them.)
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#import "modules/std.sx";
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Box :: protocol(T: Type) {
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get :: () -> T;
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}
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IntCell :: struct { v: s64; }
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StrCell :: struct { s: string; }
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impl Box(s64) for IntCell { get :: (self: *IntCell) -> s64 => self.v; }
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impl Box(string) for StrCell { get :: (self: *StrCell) -> string => self.s; }
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describe :: (..xs: Box) -> void {
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// xs[0] : Box(s64), xs[1] : Box(string) — different type-args per position.
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print("first={} second={}\n", xs[0].get(), xs[1].get());
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}
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main :: () -> s32 {
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describe(IntCell.{ v = 11 }, StrCell.{ s = "hi" });
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describe(StrCell.{ s = "x" }, IntCell.{ v = 99 });
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0;
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}
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