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.
40 lines
1.5 KiB
Plaintext
40 lines
1.5 KiB
Plaintext
// Variadic heterogeneous type packs — step 3: `$args[$i]` in
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// type positions.
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//
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// `$args[$i]` resolves to the i-th element type of the active
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// pack binding wherever a type expression is expected:
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// - return type: `-> $args[0]`
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// - local var annotation: `x : $args[1] = ...`
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// - (later: param types, fn-pointer types, struct field types)
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//
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// Today's parser hits "expected '{'" at the `$args[0]` token in
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// the return type position because the `$<ident>` arm only
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// accepts plain generic names; `[<int>]` after the name isn't
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// recognised. This file pins that rejection. Next commit teaches
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// the parser to accept `$<pack>[<int>]` and adds a new
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// `PackIndexTypeExpr` AST node; `resolveTypeWithBindings`
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// consults the active `pack_arg_types` map.
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//
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// The body intentionally exercises TWO positions per mono — the
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// return type AND a local annotation — so the parser change has
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// to cover more than just the trailing return arrow.
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#import "modules/std.sx";
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swap_take :: (..$args) -> $args[0] {
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second : $args[1] = args[1];
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// `second` is bound and typed — confirms the local-annotation
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// path also resolves. The body returns args[0] (statically
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// typed as $args[0]).
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return args[0];
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}
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main :: () -> i32 {
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// Heterogeneous call shapes — each picks a different concrete
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// pair, gets its own mono.
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a : i64 = swap_take(42, "ignored"); // $args[0] = i64, $args[1] = string
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b : string = swap_take("first", 99); // $args[0] = string, $args[1] = i64
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print("{} {}\n", a, b);
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return 0;
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}
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