请问，我应该如何解析嵌套的json about x2struct HOT 5 CLOSED

支持结构体嵌套的，像你的这种需要这么来定义：
struct Collection {
float temperature;
std::string mac;
float humidity;
XTOSTRUCT(O(temperature, mac, humidity));
};

struct Data {
int64_t timestamp;
std::vector collections;
std::string address;
XTOSTRUCT(O(timestamp, collections, address));
};

struct Info {
int errorCode;
std::string message;
Data data;
XTOSTRUCT(O(errorCode, message, data));
};

int main(int argc, char *argv[]) {
Info in;
in.errorCode = 0;
in.data.timestamp = 1531710826;
in.data.collections.resize(2);
in.data.collections[0].temperature = 26.7;
in.data.collections[0].mac = "ABCDEF";
in.data.collections[0].humidity = 75.1;
in.data.collections[1].temperature = 25.9;
in.data.collections[1].mac = "ABCDE2";
in.data.collections[1].humidity = 74.6;
in.data.address = "DEFAB";
std::string json = x2struct::X::tojson(in);
std::cout<<json<<std::endl;
return 0;
}

from x2struct.

请问必须使用O()吗？我的同事使用M()好像会编译报错

from x2struct.

M也是可以的，O和M的不同在于解析json的时候。M包起来的字段必须存在。
比如O(a,b)可以解析{"a":1}，但是M(a,b)解析{"a":1}就会抛出异常，因为b不存在

from x2struct.

O的运行结果
x@~$ ./xtest
{"errorCode":0,"message":"","data":{"timestamp":1531710826,"collections":[{"temperature":26.700000762939454,"mac":"ABCDEF","humidity":75.0999984741211},{"temperature":25.899999618530275,"mac":"ABCDE2","humidity":74.5999984741211}],"address":"DEFAB"}}

M的运行结果
x@~$ ./xtest
{"errorCode":0,"message":"","data":{"timestamp":1531710826,"collections":[{"temperature":26.700000762939454,"mac":"ABCDEF","humidity":75.0999984741211},{"temperature":25.899999618530275,"mac":"ABCDE2","humidity":74.5999984741211}],"address":"DEFAB"}}

from x2struct.

抱歉，未能及时回复。我的同事还在调试代码中，你的回复对我们确定方向很有帮助，谢谢(*￣︶￣)

from x2struct.