c++ redis hash to struct

To convert a Redis hash to a C++ struct, you can follow these steps:

1. Retrieve the hash values from Redis using a Redis client library in C++. For example, you can use the hiredis library or the cpp_redis library.

2. Create a C++ struct that represents the data structure you want to store in.

3. Iterate over the hash values and assign them to the corresponding struct members.

Here's an example:

#include <iostream>
#include <cpp_redis/cpp_redis>

// Define the struct representing your data
struct MyStruct {
    std::string field1;
    int field2;
    double field3;
};

int main() {
    // Connect to Redis
    cpp_redis::client client;
    client.connect("127.0.0.1", 6379);

    // Get the hash values from Redis
    std::vector<std::string> hashValues;
    client.hgetall("myhash", [&](cpp_redis::reply& reply) {
        if (reply.is_array()) {
            for (auto& value : reply.as_array()) {
                if (value.is_string()) {
                    hashValues.push_back(value.as_string());
                }
            }
        }
    });
    client.sync_commit();

    // Convert the hash values to struct
    MyStruct myStruct;
    if (hashValues.size() >= 3) {
        myStruct.field1 = hashValues[0];
        myStruct.field2 = std::stoi(hashValues[1]);
        myStruct.field3 = std::stod(hashValues[2]);
    }

    // Print the struct members
    std::cout << "field1: " << myStruct.field1 << std::endl;
    std::cout << "field2: " << myStruct.field2 << std::endl;
    std::cout << "field3: " << myStruct.field3 << std::endl;

    return 0;
}

In this example, we connect to Redis, retrieve the hash values using `hgetall`, and convert them to the `MyStruct` struct. Finally, we print the values of the struct members. Make sure to include the necessary headers and link against the Redis client library you choose to use.