nlohmann::ordered_json

using ordered_json = basic_json<ordered_map>;

This type preserves the insertion order of object keys.

Examples

??? example

The example below demonstrates how `ordered_json` preserves the insertion order of object keys.

```cpp
--8<-- "examples/ordered_json.cpp"
```

Output:

```json
--8<-- "examples/ordered_json.output"
```

See also

• ordered_map
• Object Order

Version history

Since version 3.9.0.