fn start_main() -> i64 {
    let maximum: u64 = 18446744073709551615;
    let direct: f32 = 1.0000000596046448;
    let bits: u8 = 0xff;
    let converted: u8 = u8(255);
    if (format_u64(maximum) not match "18446744073709551615") { return 1; }
    if (format_f32(direct) not match "1.00000012") { return 2; }
    if ((bits & 0x0f) not match 15 or (bits >> 4) not match 15 or converted not match 255) { return 3; }
    var bytes: list<u8> = [0, 255];
    var copy: list<u8> = bytes;
    copy[0] = bits << 0;
    if (bytes[0] not match 0 or copy[0] not match 255) { return 4; }
    print("numeric types\n");
    return 0;
}