如何在读取无符号整数时检测负数作为解析错误？

#include<iostream>
#include <stdexcept>

int main() {
    int negative_number = -1;
    unsigned int unsigned_number;

    try {
        unsigned_number = negative_number;
    } catch (const std::exception& e) {
        std::cout << "解析错误: " << e.what()<< std::endl;
    }

    return 0;
}

def parse_unsigned_int(input_value):
    if input_value < 0:
        raise ValueError("解析错误: 输入值为负数")
    return input_value

try:
    unsigned_number = parse_unsigned_int(-1)
except ValueError as e:
    print(e)

import re

def parse_unsigned_int(input_value):
    if re.match(r'^-', input_value):
        raise ValueError("解析错误: 输入值为负数")
    return int(input_value)

try:
    unsigned_number = parse_unsigned_int("-1")
except ValueError as e:
    print(e)

import struct

def parse_unsigned_int(binary_data):
    try:
        unsigned_number, = struct.unpack('I', binary_data)
    except struct.error:
        raise ValueError("解析错误: 无法解析无符号整数")
    return unsigned_number

try:
    unsigned_number = parse_unsigned_int(b'\xff\xff\xff\xff')
except ValueError as e:
    print(e)