#include <nlohmann/json.hpp> // for convenience using json = nlohmann::json;
to the files you want to process JSON and set the necessary switches to enable C++11 (e.g.,
-std=c++11 for GCC and Clang).
You can further use file
include/nlohmann/json_fwd.hpp for forward-declarations. The installation of json_fwd.hpp (as part of cmake's install step), can be achieved by setting