输出结果 运行上述代码,你将得到如下输出: json [ 1, 2, 3, 4, 5 ] 这表明std::vector已经成功转换为nlohmann json数组格式。 通过以上步骤,你可以轻松地将std::vector转换为nlohmann json数组,并利用nlohmann json库提供的丰富功能进行进一步的处理和操作。
#include <string.h> #include <chrono> #include <iostream> #include <nlohmann/json.hpp> #include <sstream> #include <thread> #include <vector> // for convenience using json = nlohmann::json; #define MY_COUT(args) \ std::cout << std::this_thread::get_id() << "[" << __FILE__...
The following code: #include "json.hpp" #include <vector> using nlohmann::json; int main() { std::vector<bool> boolVector; json j; j["bool_vector"] = boolVector; }; Fails to compile on os x (clang-800.0.42.1) when built like this: clang+...
vector<int> testVec; SubTestStruct subTestStruct; }; // nl 不直接支持 optional, 使用 adl_serializer 可以支持任意类型的序列化 // https://github.com/nlohmann/json/pull/2117 // https://github.com/nlohmann/json#how-do-i-convert-third-party-types namespace nlohmann { template <typename T> ...
}voidfrom_json(constjson& j, person& p){ j.at("name").get_to(p.name); j.at("address").get_to(p.address); j.at("age").get_to(p.age); } }// namespace nsns::person p {"Ned Flanders","744 Evergreen Terrace",60}; ...
该库对于数组类型的封装更加方便,既可以像传统的方式,将数组中的元素视为item(参见方式一),也可以将元素直接以不同的下标形式追加到数组内,趋向于C++中容器的概念,通过[i]为其赋值(参见方式二),也可将数组内元素使用标准容器vector、list、array、dequeue、set或map、multimap等,直接构造json对象(参见方式三) ...
)"_json; 1 或 1 2 3 4 5 json j{ {"name","Judd Trump"}, {"credits", 1754500 }, {"ranking", 1} }; 1 #2 解析与序列化 字符串: 解析 1 2 3 4 5 6 7 8 std::string s = R"( { "name":"Judd Trump", "credits": 1754500, ...
bool> testOpt; std::vector<int> testVec; SubTestStruct subTestStruct; }; // nl 不直接支持 optional, 使用 adl_serializer 可以支持任意类型的序列化 // https://github.com/nlohmann/json/pull/2117 // https://github.com/nlohmann/json#how-do-i-convert-third-party-types namespace nlohmann { ...
Speed. There are certainly faster JSON libraries out there. However, if your goal is to speed up your development by adding JSON support with a single header, then this library is the way to go. If you know how to use a std::vector or std::map, you are already set. See the contri...
nlohmann::json json_data = R"( { "array": [1, 2, 3, 4, 5] } )"_json; 使用at()方法获取数组数据,并将其转换为结构的向量: 代码语言:txt 复制 std::vector<int> vector_data = json_data.at("array").get<std::vector<int>>(); ...