| # JSON_NO_IO |
| |
| ```cpp |
| #define JSON_NO_IO |
| ``` |
| |
| When defined, headers `<cstdio>`, `<ios>`, `<iosfwd>`, `<istream>`, and `<ostream>` are not included and parse functions |
| relying on these headers are excluded. This is relevant for environments where these I/O functions are disallowed for |
| security reasons (e.g., Intel Software Guard Extensions (SGX)). |
| |
| ## Default definition |
| |
| By default, `#!cpp JSON_NO_IO` is not defined. |
| |
| ```cpp |
| #undef JSON_NO_IO |
| ``` |
| |
| ## Examples |
| |
| ??? example |
| |
| The code below forces the library not to use the headers `<cstdio>`, `<ios>`, `<iosfwd>`, `<istream>`, and |
| `<ostream>`. |
| |
| ```cpp |
| #define JSON_NO_IO 1 |
| #include <nlohmann/json.hpp> |
| |
| ... |
| ``` |
| |
| ## Version history |
| |
| - Added in version 3.10.0. |
