[ceph.git] / ceph / src / jaegertracing / opentelemetry-cpp / third_party / nlohmann-json / doc / mkdocs / docs / api / basic_json / is_object.md

# <small>nlohmann::basic_json::</small>is_object

```cpp
constexpr bool is_object() const noexcept;
```

This function returns `#!cpp true` if and only if the JSON value is an object.
    
## Return value

`#!cpp true` if type is an object, `#!cpp false` otherwise.

## Exception safety

No-throw guarantee: this member function never throws exceptions.

## Complexity

Constant.

## Examples

??? example

    The following code exemplifies `is_object()` for all JSON types.
    
    ```cpp
    --8<-- "examples/is_object.cpp"
    ```
    
    Output:
    
    ```json
    --8<-- "examples/is_object.output"
    ```

## Version history

- Added in version 1.0.0.
Commit	Line	Data
1e59de90 TL	1	# <small>nlohmann::basic_json::</small>is_object
	2
	3	```cpp
	4	constexpr bool is_object() const noexcept;
	5	```
	6
	7	This function returns `#!cpp true` if and only if the JSON value is an object.
	8
	9	## Return value
	10
	11	`#!cpp true` if type is an object, `#!cpp false` otherwise.
	12
	13	## Exception safety
	14
	15	No-throw guarantee: this member function never throws exceptions.
	16
	17	## Complexity
	18
	19	Constant.
	20
	21	## Examples
	22
	23	??? example
	24
	25	The following code exemplifies `is_object()` for all JSON types.
	26
	27	```cpp
	28	--8<-- "examples/is_object.cpp"
	29	```
	30
	31	Output:
	32
	33	```json
	34	--8<-- "examples/is_object.output"
	35	```
	36
	37	## Version history
	38
	39	- Added in version 1.0.0.