// Variadic heterogeneous type packs — Step 2.6: indexing a pack with a
// RUNTIME index is a compile error.
//
// Per locked Decision 1, a pack is comptime-only and has NO runtime
// representation — so `args[i]` is valid only when `i` is a compile-time
// constant (a literal, or an `inline for` cursor). A runtime index (here a
// `while`-loop counter) must produce a clear diagnostic, not the confusing
// "unresolved 'args'" the slice-index fall-through used to give. To walk a
// pack, use `inline for 0..args.len: (i) { ... }`, which unrolls so each
// `args[i]` is a comptime index.

#import "modules/std.sx";

count_anys :: (..$args) -> s64 {
    total : s64 = 0;
    i : s64 = 0;
    while i < args.len {
        x : Any = args[i];   // ERROR: runtime index into a comptime-only pack
        _ = x;
        total = total + 1;
        i = i + 1;
    }
    return total;
}

main :: () -> s32 {
    print("{}\n", count_anys(10, "hi", 2.5, true));
    return 0;
}