json/doc/mkdocs/docs/api/json_sax/key.md
Niels Lohmann e97c93f451
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2021-11-07 13:13:37 +01:00

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# <small>nlohmann::json_sax::</small>key
```cpp
virtual bool key(string_t& val) = 0;
```
An object key was read.
## Parameters
`val` (in)
: object key
## Return value
Whether parsing should proceed.
## Notes
It is safe to move the passed object key value.
## Version history
- Added in version 3.2.0.