// Variadic heterogeneous type packs — step 4A final-slice
// follow-up. `type_name(<dynamic-arg>)` where the argument is
// NOT a static type expression (e.g. `list[i]` indexing into
// a `$args`-derived `[]Type` slice) silently folds to "s64"
// today because `resolveTypeArg`'s index_expr fall-through
// returns `.s64`. That's exactly the kind of silent unimplemented
// arm the CLAUDE.md REJECTED PATTERNS section forbids.
//
// Next commit teaches `tryLowerReflectionCall` to detect "arg
// not statically resolvable" and emit a `builtin_call` to the
// new `.type_name` builtin. The interp's arm (already wired in
// commit 9600ba5) reads the runtime `.type_tag` Value and
// returns the per-position concrete type name.
//
// Expected output after fix:
//   s64string

#import "modules/std.sx";

walk :: (..$args) -> string {
    list := $args;
    s := "";
    i : s64 = 0;
    while i < list.len {
        s = concat(s, type_name(list[i]));
        i = i + 1;
    }
    return s;
}

main :: () -> s32 {
    print("{}\n", walk(42, "hi"));
    return 0;
}