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// MessagePack for C++ example
//
// Copyright (C) 2015 KONDO Takatoshi
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
#include <string>
#include <iostream>
#include <iomanip>
#include <sstream>
#include <cassert>
#include <msgpack.hpp>
struct base1 {
base1():a("default") {}
std::string a;
MSGPACK_DEFINE_MAP(a);
};
struct v1 : base1 {
v1():name("default"), age(0) {}
std::string name;
int age;
MSGPACK_DEFINE_MAP(MSGPACK_BASE_MAP(base1), name, age);
};
struct base2 {
base2():a("default") {}
std::string a;
MSGPACK_DEFINE_MAP(a);
};
// Removed: base1, name
// Added : base2, address
struct v2 : base2 {
v2(): age(0), address("default") {}
int age;
std::string address;
MSGPACK_DEFINE_MAP(MSGPACK_BASE_MAP(base2), age, address);
};
// The member variable "age" is in common between v1 and v2.
void print(std::string const& buf) {
for (std::string::const_iterator it = buf.begin(), end = buf.end();
it != end;
++it) {
std::cout
<< std::setw(2)
<< std::hex
<< std::setfill('0')
<< (static_cast<int>(*it) & 0xff)
<< ' ';
}
std::cout << std::dec << std::endl;
}
int main() {
{ // pack v1, unpack, convert to v2
v1 v;
v.a = "ABC";
v.name = "John Smith";
v.age = 35;
std::stringstream ss;
msgpack::pack(ss, v);
print(ss.str());
std::string const& str = ss.str();
msgpack::object_handle oh = msgpack::unpack(str.data(), str.size());
msgpack::object obj = oh.get();
std::cout << obj << std::endl;
v2 newv = obj.as<v2>();
std::cout << "v2::a " << newv.a << std::endl;
std::cout << "v2::age " << newv.age << std::endl;
std::cout << "v2::address " << newv.address << std::endl;
// "age" is set from v1
assert(newv.a == "default");
assert(newv.age == 35);
assert(newv.address == "default");
}
{ // create v2 object with zone, convert to v1
v2 v;
v.a = "DEF";
v.age = 42;
v.address = "Tokyo";
msgpack::zone z;
msgpack::object obj(v, z);
std::cout << obj << std::endl;
v1 newv = obj.as<v1>();
std::cout << "v1::a " << newv.a << std::endl;
std::cout << "v1::name " << newv.name << std::endl;
std::cout << "v1::age " << newv.age << std::endl;
// "age" is set from v2
assert(newv.a == "default");
assert(newv.name == "default");
assert(newv.age == 42);
}
}
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