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### jsoncons::jsonpatch::from_diff
```cpp
#include <jsoncons_ext/jsonpatch/jsonpatch.hpp>
template <typename Json>
Json from_diff(const Json& source, const Json& target)
```
Create a JSON Patch from a diff of two json documents.
#### Return value
Returns a JSON Patch.
### Examples
#### Create a JSON Patch
```cpp
#include <jsoncons/json.hpp>
#include <jsoncons_ext/jsonpatch/jsonpatch.hpp>
using jsoncons::json;
namespace jsonpatch = jsoncons::jsonpatch;
int main()
{
json source = json::parse(R"(
{"/": 9, "foo": "bar"}
)");
json target = json::parse(R"(
{ "baz":"qux", "foo": [ "bar", "baz" ]}
)");
auto patch = jsonpatch::from_diff(source, target);
std::error_code ec;
jsonpatch::apply_patch(source, patch, ec);
std::cout << "(1) " << pretty_print(patch) << '\n';
std::cout << "(2) " << pretty_print(source) << '\n';
}
```
Output:
```
(1)
[
{
"op": "remove",
"path": "/~1"
},
{
"op": "replace",
"path": "/foo",
"value": ["bar","baz"]
},
{
"op": "add",
"path": "/baz",
"value": "qux"
}
]
(2)
{
"baz": "qux",
"foo": ["bar","baz"]
}
```
|
