mirror of
https://github.com/nlohmann/json.git
synced 2026-10-03 22:06:59 +01:00
49 lines
986 B
Markdown
49 lines
986 B
Markdown
# <small>nlohmann::json_pointer::</small>push_front
|
|
|
|
```cpp
|
|
void push_front(const string_t& token);
|
|
|
|
void push_front(string_t&& token);
|
|
```
|
|
|
|
Append an unescaped token at the start of the reference pointer.
|
|
|
|
## Parameters
|
|
|
|
`token` (in)
|
|
: token to add
|
|
|
|
## Exception safety
|
|
|
|
Basic guarantee: if an exception is thrown (for instance, if copying the reference token fails), the JSON pointer is
|
|
left in a valid state, but its reference tokens may have changed.
|
|
|
|
## Complexity
|
|
|
|
Linear in the number of reference tokens in the `json_pointer`.
|
|
|
|
## Examples
|
|
|
|
??? example
|
|
|
|
The example shows the result of `push_front` for different JSON Pointers.
|
|
|
|
```cpp
|
|
--8<-- "examples/json_pointer__push_front.cpp"
|
|
```
|
|
|
|
Output:
|
|
|
|
```json
|
|
--8<-- "examples/json_pointer__push_front.output"
|
|
```
|
|
|
|
## See also
|
|
|
|
- [front](front.md) return first reference token
|
|
- [pop_front](pop_front.md) remove the first reference token
|
|
|
|
## Version history
|
|
|
|
- Added in version 3.13.0.
|