8a875d354c
Using a bare pack name where a runtime value is required was silent garbage (f(xs)/return xs produced a stray pointer). Now a clear, context-tailored compile error: isPackName + diagPackAsValue, caught at lowerVarDecl (storage), lowerReturn (return), lowerFor (iterate), and an identifier-arm catch-all for call/other. Storage binds a placeholder so there is no cascade error. Suggestions point at WORKING fixes -- materialize (..xs), or declare the slice form ..xs: []P for runtime use. The plan category-B "spread ..xs" is broken (spreading a comptime pack into a []Any param crashes the LLVM verifier; filed issue 0053), so the diagnostics steer to the slice-of-protocol variadic instead. Repurposed examples/162-pack-bare-args.sx (was an aspirational bare-$args->[]Any auto-materialise, contradicting Decision 1) into the slice-form forward (..args: []Any). examples/203 is the four-category negative test. specs.md "Pack as value" updated. 238 examples + unit green.
24 lines
717 B
Plaintext
24 lines
717 B
Plaintext
// Step 2.7 — forwarding a variadic to a `[]Any` helper.
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//
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// A comptime pack `..$args` is comptime-only (Decision 1): `args` bare is NOT a
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// runtime value, so `log_count(args)` on a pack is an error (see the
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// pack-as-value tests). To forward a variadic to a runtime `[]Any` helper,
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// declare it as the *slice* variadic `..args: []Any` — then `args` is a real
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// `[]Any` slice that passes straight through.
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#import "modules/std.sx";
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log_count :: (items: []Any) -> s64 {
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return items.len;
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}
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// Slice variadic: `args` is a runtime []Any, forwarded directly.
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forward :: (..args: []Any) -> s64 {
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return log_count(args);
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}
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main :: () -> s32 {
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print("{}\n", forward(1, "hi", 2.5));
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return 0;
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}
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