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Niels Lohmann a47170346a docs: new design for the documentation site (#5934)
* docs: new design for the documentation site

Apply the brand to the Material for MkDocs site: Inter and JetBrains Mono
served by the site (upright and real italic), brand colours, blue header band
with the syntax pattern, wordmark in the header, new home page (hero, cards,
animated feature tour), 404 page, polish for tabs, search, footer, focus
rings, tables and code blocks, and theme features (code copy, previous/next
footer, TOC follow, search suggestions).

Draw the number railroad diagram, the parser callback events and the iterator
illustrations as inline SVGs that follow the light and dark scheme. The
generator scripts are in docs/mkdocs/scripts/figures; the feature slideshow
(json-light.svg, json-dark.svg, replacing json.gif on the home page) is built
by docs/mkdocs/scripts/slideshow. Decision nodes in five flowcharts become
hexagons, which need far less room.

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* docs: add figures, table captions and a macro chooser

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* docs: cross-link concept pages and API pages in See also sections

Add See also links in both directions between the concept pages (features,
home, integration) and the API pages, write API links in code font, give every
entry a comment after a dash, and show the callback event figure on the parser
callbacks page.

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* docs: address review comments on the new design

- Home: add a "Latest release" button
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Signed-off-by: Niels Lohmann <mail@nlohmann.me>
2026-10-27 07:41:42 +01:00

1.7 KiB

nlohmann::basic_json::array

static basic_json array(initializer_list_t init = {});

Creates a JSON array value from a given initializer list. That is, given a list of values a, b, c, creates the JSON value #!json [a, b, c]. If the initializer list is empty, the empty array #!json [] is created.

Parameters

init (in)
initializer list with JSON values to create an array from (optional)

Return value

JSON array value

Exception safety

Strong guarantee: if an exception is thrown, there are no changes in the JSON value.

Complexity

Linear in the size of init.

Notes

This function is only needed to express two edge cases that cannot be realized with the initializer list constructor (basic_json(initializer_list_t, bool, value_t)). These cases are:

  1. creating an array whose elements are all pairs whose first element is a string — in this case, the initializer list constructor would create an object, taking the first elements as keys
  2. creating an empty array — passing the empty initializer list to the initializer list constructor yields an empty object

Examples

??? example

The following code shows an example for the `array` function.

```cpp
--8<-- "examples/array.cpp"
```

Output:

```json
--8<-- "examples/array.output"
```

See also

Version history

  • Added in version 1.0.0.