json/api/ordered_json_editable_view.md

nlohmann::ordered_json_editable_view

Defined in header <nlohmann/json_view.hpp>

using ordered_json_editable_view = basic_json_view<ordered_json, true>;

This type is a basic_json_view of a value of an ordered_json_editable_document, the corresponding view for ordered_json_view the way json_editable_view is for json_view.

Examples

??? example

The example below is the same as [`ordered_json_editable_document`'s](ordered_json_editable_document.md): the
views `set` returns see the document's member order preserved on `materialize()`, unlike for a
[`json_editable_document`](json_editable_document.md).

```cpp
#include <iostream>
#include <nlohmann/json_view.hpp>

using ordered_json_editable_document = nlohmann::ordered_json_editable_document;

int main()
{
    // ordered_json_editable_document is basic_json_document<nlohmann::ordered_json, true>
    ordered_json_editable_document doc = ordered_json_editable_document::parse(R"({"z": 1, "a": 2, "m": 3})");
    doc.set(doc.root(), "b", 4); // set() always appends a new member at the end

    // materialize() preserves the document order (with "b" at the end),
    // instead of sorting the keys the way json_editable_document does
    std::cout << doc.root().materialize().dump() << '\n';
}

```

Output:

```json
{"z":1,"a":2,"m":3,"b":4}

```

See also

• ordered_json_editable_document - the document type this view refers into
• ordered_json_view - the corresponding read-only view
• json_editable_view - the corresponding view for json_editable_document

Version history

Since version 3.13.0.