diff --git a/README.md b/README.md index ebf2b52f..28c52f4f 100644 --- a/README.md +++ b/README.md @@ -21,6 +21,7 @@ - [STL-like access](#stl-like-access) - [Conversion from STL containers](#conversion-from-stl-containers) - [JSON Pointer and JSON Patch](#json-pointer-and-json-patch) + - [JSON Merge Patch](#json-merge-patch) - [Implicit conversions](#implicit-conversions) - [Conversions to/from arbitrary types](#arbitrary-types-conversions) - [Binary formats (CBOR, MessagePack, and UBJSON)](#binary-formats-cbor-messagepack-and-ubjson) @@ -456,6 +457,37 @@ json::diff(j_result, j_original); // ] ``` +### JSON Merge Patch + +The library supports **JSON Merge Patch** ([RFC 7386](https://tools.ietf.org/html/rfc7386)) as a patch format. Instead of using JSON Pointer (see above) to specify values to be manipulated, it describes the changes using a syntax that closely mimics the document being modified. + +```cpp +// a JSON value +json j_document = R"({ + "a": "b", + "c": { + "d": "e", + "f": "g" + } +})"_json; + +// a patch +json j_patch = R"({ + "a":"z", + "c": { + "f": null + } +})"_json; + +// apply the patch +j_original.merge_patch(j_patch); +// { +// "a": "z", +// "c": { +// "d": "e" +// } +// } +``` ### Implicit conversions