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31 lines
1.2 KiB
Markdown
31 lines
1.2 KiB
Markdown
# JSON Merge Patch
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The library supports JSON Merge Patch ([RFC 7386](https://tools.ietf.org/html/rfc7386)) as a patch format.
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The merge patch format is primarily intended for use with the HTTP PATCH method as a means of describing a set of
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modifications to a target resource's content. This function applies a merge patch to the current JSON value.
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Instead of using [JSON Pointer](json_pointer.md) to specify values to be manipulated, it describes the changes using a
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syntax that closely mimics the document being modified. Unlike [JSON Patch](json_patch.md), a JSON Merge Patch cannot
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express every kind of change (e.g., it cannot reorder array elements or remove a specific array element), but it is
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easier to read and write for object-shaped documents.
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??? example
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The following code shows how a JSON Merge Patch is applied to a JSON document.
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```cpp
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--8<-- "examples/merge_patch.cpp"
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```
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Output:
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```json
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--8<-- "examples/merge_patch.output"
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```
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## See also
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- [JSON Patch and Diff](json_patch.md) - a more expressive alternative that describes a sequence of operations
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- [JSON Pointer](json_pointer.md) - the addressing scheme used by JSON Patch
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- Function [`merge_patch`](../api/basic_json/merge_patch.md)
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