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sx/examples/packs/0529-packs-protocol-pack-parameterized.sx
agra 66bdc70bf1 test: group examples into per-category folders
Move examples/*.sx and their expected/ snapshots into per-category
subfolders (examples/<category>/...). Folder = leading filename token,
with ffi-objc/ffi-jni kept whole; filenames are unchanged. The corpus
runner and LSP sweep now discover each category's expected/ dir, while
issues/ stays flat. Example 1058's repo-root-relative companion import
is made file-relative. Path strings embedded in 164 snapshots were
regenerated (path-only changes). Test-layout docs in CLAUDE.md updated.
2026-06-21 14:41:34 +03:00

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// Feature 1 — method calls on a PARAMETERIZED protocol pack (the canonical
// shape: `..xs: ValueListenable` where each element conforms with its own
// type-arg). Calling the protocol method `get()` on `xs[i]` resolves to the
// concrete element's impl, even though each element binds a different `T`.
//
// (Parameterised-protocol impl methods with a concrete source type are now
// registered as `<Source>.<method>`, so UFCS — and thus `xs[i].get()` —
// resolves them.)
#import "modules/std.sx";
Box :: protocol(T: Type) {
get :: (self: *Self) -> T;
}
IntCell :: struct { v: i64; }
StrCell :: struct { s: string; }
impl Box(i64) for IntCell { get :: (self: *IntCell) -> i64 => self.v; }
impl Box(string) for StrCell { get :: (self: *StrCell) -> string => self.s; }
describe :: (..xs: Box) -> void {
// xs[0] : Box(i64), xs[1] : Box(string) — different type-args per position.
print("first={} second={}\n", xs[0].get(), xs[1].get());
}
main :: () -> i32 {
describe(IntCell.{ v = 11 }, StrCell.{ s = "hi" });
describe(StrCell.{ s = "x" }, IntCell.{ v = 99 });
0
}