dadf80b3f1
Lock-ins for follow-ups #3 (bare `args` reference) and #4 (`args[<runtime_int>]`) from step 2b. Both share the same root cause: the pack-mono does not materialise an `[]Any` slice value for the pack name, so any body that needs `args` as a value at runtime fails. `examples/162-pack-bare-args.sx` — pack-fn body forwards `args` to a `[]Any`-typed helper. Today: "unresolved 'args' (in ... fn forward__pack_s64_string_f64)". `examples/163-pack-runtime-index.sx` — pack-fn body indexes `args[i]` with a runtime `i`. Today: LLVM verifier crash — "GEP base pointer is not a vector or a vector of pointers" — because `args` resolves to a junk Ref via the scope-lookup fall-through, and the slice-indexing path emits a GEP off that. Next commit materialises an `[]Any` slice on demand inside the mono: each pack param is boxed into Any, stored in a stack [N x Any] array, and the slice {data_ptr, len} is bound to the pack name. `args` then resolves as a runtime value the same way the pre-2b inline path used to. `args[i]` runtime indexing goes through the standard slice index path; element type is `Any` (lossy on per-position types — inherent to runtime indexing into a heterogeneous pack). 202/202 example tests + `zig build test` green.
30 lines
988 B
Plaintext
30 lines
988 B
Plaintext
// Variadic heterogeneous type packs — follow-up #3 (bare `args`
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// reference). The pack-mono doesn't materialise a slice value
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// for the pack name itself, so any body that references `args`
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// without indexing (e.g. forwarding to a `[]Any`-typed helper,
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// or just computing `args.len` through a non-comptime path)
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// fails with "unresolved 'args'".
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//
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// Next commit materialises an `[]Any` slice on demand inside
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// the mono: each pack param is boxed into Any, stored in a
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// stack [N x Any] array, and the slice {data_ptr, len} is bound
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// to the pack name. `args` then resolves as a runtime value
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// like the pre-2b inline path did.
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#import "modules/std.sx";
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// Helper that takes a slice. Today the pack body can't pass
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// `args` here because `args` isn't in scope as a value.
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log_count :: (items: []Any) -> s64 {
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return items.len;
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}
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forward :: (..$args) -> 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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