identAsString

fn identAsString(zg: *ZonGen, ident_token: Ast.TokenIndex) !Zoir.NullTerminatedString {
    const gpa = zg.gpa;
    const string_bytes = &zg.string_bytes;
    const str_index = try zg.appendIdentStr(ident_token);
    const key: []const u8 = string_bytes.items[str_index..];
    const gop = try zg.string_table.getOrPutContextAdapted(
        gpa,
        key,
        StringIndexAdapter{ .bytes = string_bytes },
        StringIndexContext{ .bytes = string_bytes },
    );
    if (gop.found_existing) {
        string_bytes.shrinkRetainingCapacity(str_index);
        return @fromBackingInt(@intCast(gop.key_ptr.*));
    }
    gop.key_ptr.* = str_index;
    try string_bytes.append(gpa, 0);
    return @fromBackingInt(@intCast(str_index));
}