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
1.2 KiB
Plaintext
32 lines
1.2 KiB
Plaintext
// Slice-of-protocol variadic `..xs: []P` — the RUNTIME counterpart to the
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// comptime pack `..xs: P`. Each trailing arg is `xx`-erased to a `P` protocol
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// value {ctx, vtable} and packed into a runtime `[]P`, so the elements can be
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// indexed by a RUNTIME index and dispatched through the protocol interface
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// (unlike a pack, which is comptime-only — see examples/163).
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//
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// This is the type-safe way to iterate a heterogeneous arg list at runtime:
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// concrete per-position types are erased to the constraint protocol.
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#import "modules/std.sx";
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Show :: protocol { show :: (self: *Self) -> string; }
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A :: struct { x: i64; }
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B :: struct { s: string; }
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impl Show for A { show :: (self: *A) -> string => "A"; }
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impl Show for B { show :: (self: *B) -> string => "B"; }
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// Runtime loop over a []Show: runtime index + protocol-method dispatch.
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each :: (..xs: []Show) -> void {
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i := 0;
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while i < xs.len {
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print("[{}]={}\n", i, xs[i].show());
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i = i + 1;
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}
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}
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main :: () -> i32 {
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each(A.{ x = 1 }, B.{ s = "hi" }, A.{ x = 3 }); // heterogeneous, erased to Show
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each(); // empty is fine (len 0)
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0
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}
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