ceph/src/jaegertracing/opentelemetry-cpp/third_party/nlohmann-json/doc/mkdocs/docs/integration/index.md

   1 # Header only
   2
   3 [`json.hpp`](https://github.com/nlohmann/json/blob/develop/single_include/nlohmann/json.hpp) is the single required file in `single_include/nlohmann` or [released here](https://github.com/nlohmann/json/releases). You need to add
   4
   5 ```cpp
   6 #include <nlohmann/json.hpp>
   7
   8 // for convenience
   9 using json = nlohmann::json;
  10 ```
  11
  12 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).
  13
  14 You can further use file [`include/nlohmann/json_fwd.hpp`](https://github.com/nlohmann/json/blob/develop/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 `-DJSON_MultipleHeaders=ON`.