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### jsoncons::jsonpatch::jsonpatch_error
```cpp
#include <jsoncons_ext/jsonpatch/jsonpatch_error.hpp>
```
<br>
`jsoncons::jsonpatch::jsonpatch_error` defines an exception type for reporting failures in jsonpatch operations.
#### Constructors
jsonpatch_error(std::error_code ec)
jsonpatch_error(const jsonpatch_error& other)
#### Member functions
const char* what() const noexcept
Returns a message for this exception
#### Inherited from std::system_error
const std::error_code code() const noexcept
Returns an error code for this exception
### Example
```cpp
#include <jsoncons/json.hpp>
#include <jsoncons_ext/jsonpatch/jsonpatch.hpp>
using jsoncons::json;
int main()
{
json target = R"(
{ "foo": "bar"}
)"_json;
json patch = R"(
[
{ "op": "add", "path": "/baz", "value": "qux" },
{ "op": "add", "path": "/foo", "value": [ "bar", "baz" ] },
{ "op": "add", "path": "/baz/bat", "value": "qux" } // nonexistent target
]
)"_json;
try
{
jsonpatch::apply_patch(target, patch);
}
catch (const jsonpatch::jsonpatch_error& e)
{
std::cout << "(1) " << e.what() << '\n';
std::cout << "(2) " << target << '\n';
}
}
```
Output:
```
(1) JSON Patch add operation failed
(2) {"foo":"bar"}
```
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