jsonpatch_error.md

jsoncons::jsonpatch::jsonpatch_error

#include <jsoncons_ext/jsonpatch/jsonpatch_error.hpp>

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

#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() << std::endl;
        std::cout << "(2) " << target << std::endl;
    }
}

Output:

(1) JSON Patch add operation failed
(2) {"foo":"bar"}