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#include <cstdio>
#include <string>
#include <limits>
#include <exception>
#include <Magnum/Magnum.h>
#include <Magnum/Math/Vector2.h>
#include <nlohmann/json.hpp>
namespace nlohmann {
template<typename t>
requires std::is_integral_v<t>
struct adl_serializer<Magnum::Math::Vector2<t>> final {
static void to_json(json& j, const Magnum::Math::Vector2<t>& val)
{
char buf[64];
using type = std::conditional_t<std::is_signed_v<t>, std::intmax_t, std::uintmax_t>;
constexpr auto format_string = std::is_signed_v<t> ? "%jd x %jd" : "%ju x %ju";
snprintf(buf, sizeof(buf), format_string, (type)val[0], (type)val[1]);
j = buf;
}
static void from_json(const json& j, Magnum::Math::Vector2<t>& val)
{
std::string str = j;
using type = std::conditional_t<std::is_signed_v<t>, std::intmax_t, std::uintmax_t>;
constexpr auto format_string = std::is_signed_v<t> ? "%jd x %jd%n" : "%ju x %ju%n";
type x = 0, y = 0;
int n = 0;
int ret = std::sscanf(str.c_str(), format_string, &x, &y, &n);
if (ret != 2 || (std::size_t)n != str.size() || x != (t)x || y != (t)y)
{
std::string msg; msg.reserve(128);
msg += "failed to parse string '";
msg += str;
msg += "' as Magnum::Vector2";
throw std::invalid_argument(msg);
}
val = { (t)x, (t)y };
}
};
} // namespace nlohmann
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