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sx/examples/packs/0537-packs-pack-xx-to-slice.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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// `xx <pack>` materializes a comptime pack into a runtime slice (issue 0053):
// the explicit pack→slice bridge. With a `[]Any` target each element is boxed
// to `Any`; with a `[]P` target each is `xx`-erased to the protocol `P`. This is
// how you forward a pack to a runtime (`[]Any` / `[]P`) helper.
#import "modules/std.sx";
Show :: protocol { show :: (self: *Self) -> string; }
A :: struct {}
B :: struct { s: string; }
impl Show for A { show :: (self: *A) -> string => "A"; }
impl Show for B { show :: (self: *B) -> string => "B"; }
count_any :: (items: []Any) -> i64 { return items.len; }
show_all :: (items: []Show) -> i64 {
i := 0;
while i < items.len { print("{}\n", items[i].show()); i = i + 1; }
return items.len;
}
// `..$args` pack → []Any via `xx`.
fwd_any :: (..$args) -> i64 { return count_any(xx args); }
// `..xs: Show` pack → []Show via `xx`.
fwd_show :: (..xs: Show) -> i64 { return show_all(xx xs); }
main :: () -> i32 {
print("any={}\n", fwd_any(1, "hi", 2.5)); // 3
print("show={}\n", fwd_show(A.{}, B.{ s = "x" }, A.{})); // A B A, 3
0
}