explicit json_pointer(const string_t& s = "");

Create a JSON pointer according to the syntax described in Section 3 of RFC6901.

s (in) : string representing the JSON pointer; if omitted, the empty string is assumed which references the whole JSON value

• Throws parse_error.107 if the given JSON pointer s is nonempty and does not begin with a slash (/); see example below.
• Throws parse_error.108 if a tilde (~) in the given JSON pointer s is not followed by 0 (representing ~) or 1 (representing /); see example below.

??? example

The example shows the construction several valid JSON pointers as well as the exceptional behavior.
 
```cpp
--8<-- "examples/json_pointer.cpp"
```

Output:

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

• Added in version 2.0.0.
• Changed type of s to string_t in version 3.11.0.