// Indexing a value whose type is NOT an indexable shape — a single-element
// pointer `*T`, a pointer-to-slice `*[]T`, or a plain struct — is a type
// error, diagnosed at lowering with a located message.
//
// Regression (issue 0183): `expr[i]` on a non-indexable base fell through
// `lowerIndexExpr` to an `index_get` carrying an `.unresolved` element type,
// which reached emit_llvm and panicked ("unresolved type reached LLVM
// emission", exit 134) with no source location. The guard now rejects it
// cleanly (exit 1). Indexable shapes — `[N]T` / `[]T` / `[*]T` / `string` /
// `Vector` / `*[N]T` and the optional-chain forms — are unaffected.
//
// For a single pointer `*T` the message hints at the indexable alternatives
// (many-pointer `[*]T`, or dereference first); other non-indexable types get
// the bare "cannot index a value of type '...'" form.

#import "modules/std.sx";

S :: struct { a: i64; }

main :: () {
    x := 5;
    p : *i64 = @x;
    print("{}\n", p[0]);    // error: '*i64' is not indexable (hint form)

    s := S.{ a = 1 };
    print("{}\n", s[0]);    // error: 'S' is not indexable (bare form)
}