Serialize dynamic array

[AlexRos101]

Hi nlohmann!

Thank you for your project.

I have a question.

I want to serialize a dynamic array. The code is like below.

struct person {
		std::string name;
		std::string address;
		int age;
		std::string *emails;	// this is a dynamic array of emails which the person has.
	};

How can I solve this problem?

Thanks.

[frenzisys]

Use std::vector<std::string> emails Il mar 24 dic 2019, 08:17 AlexRos101 <notifications@github.com> ha scritto:

…

Hi nlohmann! Thank you for your project. I have a question. I want to serialize a dynamic array. The code is like below. struct person { std::string name; std::string address; int age; std::string *emails; // this is a dynamic array of emails which the person has. }; How can I solve this problem? Thanks. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#1879?email_source=notifications&email_token=AE63RKSVH76XQOCOKQ27FPLQ2GZPTA5CNFSM4J63QGK2YY3PNVWWK3TUL52HS4DFUVEXG43VMWVGG33NNVSW45C7NFSM4ICOTZCQ>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AE63RKXD5OCHNBZYIELLVWLQ2GZPTANCNFSM4J63QGKQ> .

[AlexRos101]

Hi frenzisys!

Thank you for your reply.

In that case, I can implement from_json function.

Can you send me to_json function in the case of using std::vector?

Thanks.

[nlohmann]

std::vector is mapped to an array automatically. You just need to implement to_json/from_json for person. All steps for this are described in https://github.com/nlohmann/json#arbitrary-types-conversions.

[dota17]

Can you send me to_json function in the case of using std::vector?

The example is very simple:

namespace ns {
    struct person {
	std::string name;
	std::string address;
	int age;
	std::vector<std::string> emails;	// this is a dynamic array of emails which the person has.
    };
    void to_json(json& j, const person& p) {
        j = json{{"name", p.name}, {"address", p.address}, {"age", p.age}, {"emails", p.emails}};
    }

    void from_json(const json& j, person& p) {
        j.at("name").get_to(p.name);
        j.at("address").get_to(p.address);
        j.at("age").get_to(p.age);
        j.at("emails").get_to(p.emails);
    }
} // namespace ns

I think this issue could be closed.