66bdc70bf1
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.
32 lines
1.1 KiB
Plaintext
32 lines
1.1 KiB
Plaintext
// Feature 1 — protocol-interface method calls on heterogeneous pack elements.
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//
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// `..xs: Greeter` binds per call shape; each `xs[i]` is the concrete element,
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// and calling the protocol's own method `greet()` on it dispatches to that
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// element's impl. Elements may be DIFFERENT concrete types (Dog, Cat) as long
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// as each conforms to Greeter — this is the protocol-interface access the
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// pack is for. (Protocol method decls omit the implicit `self`; impls list it.)
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#import "modules/std.sx";
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Greeter :: protocol {
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greet :: (self: *Self) -> i64;
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}
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Dog :: struct { age: i64; }
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Cat :: struct { lives: i64; }
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impl Greeter for Dog { greet :: (self: *Dog) -> i64 => self.age; }
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impl Greeter for Cat { greet :: (self: *Cat) -> i64 => self.lives * 100; }
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pair_sum :: (..xs: Greeter) -> i64 {
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return xs[0].greet() + xs[1].greet();
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}
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main :: () -> i32 {
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d := Dog.{ age = 3 };
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c := Cat.{ lives = 9 };
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print("dog+cat={}\n", pair_sum(d, c)); // 3 + 900 = 903 (heterogeneous)
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print("cat+dog={}\n", pair_sum(c, d)); // 900 + 3 = 903 (order swapped)
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print("dog+dog={}\n", pair_sum(d, Dog.{ age = 4 })); // 3 + 4 = 7
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0
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}
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