nlohmann-json

JSON library for modern C++ with intuitive syntax

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JSON for modern C++

nlohmann-json

Include the header in C++ code to parse JSON strings

$ #include <nlohmann/json.hpp>
using json = nlohmann::json;
json j = json::parse("[1, 2, 3]");

Create and serialize JSON objects in C++

$ json j;
j["name"] = "John";
j["age"] = 30;
std::cout << j.dump();

Access nested JSON elements

$ json j = json::parse("{\"user\": {\"id\": 1}}");
int id = j["user"]["id"];