forked from Research/WhisperCom
40 lines
636 B
Markdown
40 lines
636 B
Markdown
|
# basic_json::is_string
|
||
|
|
|
||
|
|
```cpp
|
||
|
|
constexpr bool is_string() const noexcept;
|
||
|
|
```
|
||
|
|
|
||
|
|
This function returns `#!cpp true` if and only if the JSON value is a string.
|
||
|
|
|
||
|
|
## Return value
|
||
|
|
|
||
|
|
`#!cpp true` if type is a string, `#!cpp false` otherwise.
|
||
|
|
|
||
|
|
## Exception safety
|
||
|
|
|
||
|
|
No-throw guarantee: this member function never throws exceptions.
|
||
|
|
|
||
|
|
## Complexity
|
||
|
|
|
||
|
|
Constant.
|
||
|
|
|
||
|
|
## Example
|
||
|
|
|
||
|
|
??? example
|
||
|
|
|
||
|
|
The following code exemplifies `is_string()` for all JSON types.
|
||
|
|
|
||
|
|
```cpp
|
||
|
|
--8<-- "examples/is_string.cpp"
|
||
|
|
```
|
||
|
|
|
||
|
|
Output:
|
||
|
|
|
||
|
|
```json
|
||
|
|
--8<-- "examples/is_string.output"
|
||
|
|
```
|
||
|
|
|
||
|
|
## Version history
|
||
|
|
|
||
|
|
- Added in version 1.0.0.
|