{

using boost::int128::uint128_t;

using boost::int128::int128_t;

char buffer[64];

// === to_chars: Convert integers to character strings ===

std::cout << "=== to_chars ===" << std::endl;

// Unsigned 128-bit to decimal string

constexpr uint128_t max_u128 {std::numeric_limits<uint128_t>::max()};

auto result {boost::charconv::to_chars(buffer, buffer + sizeof(buffer), max_u128)};

*result.ptr = '\0';

std::cout << "uint128_t max (decimal): " << buffer << std::endl;

// Signed 128-bit to decimal string

constexpr int128_t min_i128 {std::numeric_limits<int128_t>::min()};

result = boost::charconv::to_chars(buffer, buffer + sizeof(buffer), min_i128);

*result.ptr = '\0';

std::cout << "int128_t min (decimal): " << buffer << std::endl;

// Hexadecimal output (base 16)

uint128_t hex_value {UINT64_C(0xDEADBEEF), UINT64_C(0xCAFEBABE12345678)};

result = boost::charconv::to_chars(buffer, buffer + sizeof(buffer), hex_value, 16);

*result.ptr = '\0';

std::cout << "uint128_t (hex): 0x" << buffer << std::endl;

// Octal output (base 8)

result = boost::charconv::to_chars(buffer, buffer + sizeof(buffer), int128_t{511}, 8);

*result.ptr = '\0';

std::cout << "int128_t 511 (octal): 0" << buffer << std::endl;

// === from_chars: Parse character strings to integers ===

std::cout << "\n=== from_chars ===" << std::endl;

// Parse decimal string to uint128_t

const char* decimal_str {"340282366920938463463374607431768211455"};

uint128_t parsed_unsigned;

boost::charconv::from_chars(decimal_str, decimal_str + std::strlen(decimal_str), parsed_unsigned);

std::cout << "Parsed \"" << decimal_str << "\"" << std::endl;

std::cout << " Result: " << parsed_unsigned << std::endl;

std::cout << " Equals max? " << std::boolalpha << (parsed_unsigned == max_u128) << std::endl;

// Parse negative decimal string to int128_t

const char* negative_str {"-170141183460469231731687303715884105728"};

int128_t parsed_signed;

boost::charconv::from_chars(negative_str, negative_str + std::strlen(negative_str), parsed_signed);

std::cout << "Parsed \"" << negative_str << "\"" << std::endl;

std::cout << " Result: " << parsed_signed << std::endl;

std::cout << " Equals min? " << (parsed_signed == min_i128) << std::endl;

// Parse hexadecimal string (base 16)

const char* hex_str {"DEADBEEFCAFEBABE12345678"};

uint128_t parsed_hex;

boost::charconv::from_chars(hex_str, hex_str + std::strlen(hex_str), parsed_hex, 16);

std::cout << "Parsed hex \"" << hex_str << "\"" << std::endl;

std::cout << " Result: " << parsed_hex << std::endl;

return 0;

}