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#include <cstdio>
#include <string>
#include <exception>
#include <Magnum/Magnum.h>
#include <Magnum/Math/Vector2.h>
#include <nlohmann/json.hpp>
namespace nlohmann {
template<typename t>
struct adl_serializer<Magnum::Math::Vector2<t>> final {
static void to_json(json& j, const Magnum::Math::Vector2<t>& x);
static void from_json(const json& j, Magnum::Math::Vector2<t>& x);
};
template<typename t>
void adl_serializer<Magnum::Math::Vector2<t>>::to_json(json& j, const Magnum::Math::Vector2<t>& val)
{
char buf[64];
snprintf(buf, sizeof(buf), "%d x %d", val[0], val[1]);
j = buf;
}
template<typename t>
void adl_serializer<Magnum::Math::Vector2<t>>::from_json(const json& j, Magnum::Math::Vector2<t>& val)
{
std::string str = j;
int x = 0, y = 0, n = 0;
int ret = std::sscanf(str.c_str(), "%d x %d%n", &x, &y, &n);
if (ret != 2 || (std::size_t)n != str.size())
{
std::string msg; msg.reserve(64 + str.size());
msg += "failed to parse string '";
msg += str;
msg += "' as Magnum::Vector2i";
throw std::invalid_argument(msg);
}
val = { x, y };
}
} // namespace nlohmann
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