json_view: no save() and load() on big-endian targets

The image format is little-endian only. Instead of throwing type_error.320 at runtime, save_image(), load_image() and the members save() and load() do not exist on a big-endian target, so a call fails to compile, like set() on a read-only document. type_error.320 remains for saving a discarded document. Signed-off-by: Niels Lohmann <mail@nlohmann.me>
json_view: view_mode enum instead of bool Editable, node_kind for node::kind
2026-10-25 23:38:58 +00:00 · 2026-10-25 20:41:48 +01:00 · 2026-10-25 20:41:47 +01:00
490 changed files with 3134 additions and 5163 deletions
@@ -1,33 +1,3 @@
-# Style or vendor rule sets that do not fit a header-only library:
-#   altera-*, fuchsia-*, llvmlibc-*, android-cloexec-fopen, boost-use-ranges, llvm-header-guard,
-#   llvm-include-order, llvm-prefer-static-over-anonymous-namespace, llvm-use-ranges,
-#   misc-use-anonymous-namespace, google-runtime-float, google-runtime-int, hicpp-signed-bitwise,
-#   bugprone-signed-bitwise, hicpp-explicit-conversions, google-explicit-constructor,
-#   cppcoreguidelines-explicit-constructor, misc-explicit-constructor (implicit conversions are the
-#   API), readability-trailing-comma,
-#   hicpp-avoid-goto / cppcoreguidelines-avoid-goto, hicpp-no-array-decay,
-#   hicpp-uppercase-literal-suffix, readability-uppercase-literal-suffix, modernize-use-trailing-return-type.
-# Constructs the library needs on purpose (the library supports C++11 and legacy compilers):
-#   cppcoreguidelines-macro-usage, cppcoreguidelines-avoid-do-while (macros),
-#   cppcoreguidelines-pro-bounds-*, cppcoreguidelines-pro-type-reinterpret-cast,
-#   cppcoreguidelines-pro-type-union-access (parsers, serializers, basic_json's value union),
-#   cppcoreguidelines-avoid-const-or-ref-data-members, cppcoreguidelines-rvalue-reference-param-not-moved,
-#   cppcoreguidelines-avoid-non-const-global-variables, misc-non-private-member-variables-in-classes,
-#   misc-no-recursion (value walks are recursive, bounded by detail::recursion_depth_limit()),
-#   modernize-type-traits, modernize-use-constraints, modernize-use-ranges, modernize-use-std-numbers,
-#   modernize-use-designated-initializers, modernize-use-nodiscard, modernize-concat-nested-namespaces,
-#   readability-redundant-typename, readability-redundant-parentheses,
-#   readability-redundant-access-specifiers, readability-simplify-boolean-expr,
-#   readability-use-concise-preprocessor-directives, modernize-use-string-view,
-#   modernize-use-integer-sign-comparison (needs std::cmp_less; the flagged
-#   static_cast<std::size_t>(end - pos) < n comparisons are deliberate)
-#   (all need a newer standard or compiler than C++11, or would change macro-generated or
-#   deliberately explicit code).
-# Too noisy to be useful (numeric parsing/formatting code, doctest, tests):
-#   bugprone-easily-swappable-parameters, cppcoreguidelines-avoid-magic-numbers, readability-magic-numbers,
-#   readability-identifier-length, readability-function-cognitive-complexity, performance-enum-size,
-#   concurrency-mt-unsafe, misc-confusable-identifiers, misc-include-cleaner (run on its own for
-#   the consumer headers in cmake/ci.cmake).
 # portability-avoid-pragma-once: kept disabled on purpose. #pragma once is accepted
 # by every supported compiler, and tools/amalgamate/amalgamate.py strips it from
 # single_include, so there is nothing left to fix here.
@@ -40,14 +10,14 @@ Checks: '*,
         -android-cloexec-fopen,
         -boost-use-ranges,
         -bugprone-easily-swappable-parameters,
-         -bugprone-signed-bitwise,
+         -cert-err58-cpp,
+         -clang-analyzer-webkit.NoUncountedMemberChecker,
         -concurrency-mt-unsafe,
         -cppcoreguidelines-avoid-const-or-ref-data-members,
         -cppcoreguidelines-avoid-do-while,
         -cppcoreguidelines-avoid-goto,
         -cppcoreguidelines-avoid-magic-numbers,
         -cppcoreguidelines-avoid-non-const-global-variables,
-         -cppcoreguidelines-explicit-constructor,
         -cppcoreguidelines-macro-usage,
         -cppcoreguidelines-pro-bounds-avoid-unchecked-container-access,
         -cppcoreguidelines-pro-bounds-array-to-pointer-decay,
@@ -56,15 +26,19 @@ Checks: '*,
         -cppcoreguidelines-pro-type-reinterpret-cast,
         -cppcoreguidelines-pro-type-union-access,
         -cppcoreguidelines-rvalue-reference-param-not-moved,
+         -cppcoreguidelines-virtual-class-destructor,
         -fuchsia-default-arguments-calls,
         -fuchsia-default-arguments-declarations,
         -fuchsia-overloaded-operator,
         -google-explicit-constructor,
+         -google-readability-function-size,
         -google-runtime-float,
         -google-runtime-int,
         -hicpp-avoid-goto,
         -hicpp-explicit-conversions,
+         -hicpp-function-size,
         -hicpp-no-array-decay,
+         -hicpp-no-assembler,
         -hicpp-signed-bitwise,
         -hicpp-uppercase-literal-suffix,
         -llvm-header-guard,
@@ -74,7 +48,6 @@ Checks: '*,
         -llvmlibc-*,
         -misc-use-anonymous-namespace,
         -misc-confusable-identifiers,
-         -misc-explicit-constructor,
         -misc-include-cleaner,
         -misc-no-recursion,
         -misc-non-private-member-variables-in-classes,
@@ -82,22 +55,20 @@ Checks: '*,
         -modernize-type-traits,
         -modernize-use-constraints,
         -modernize-use-designated-initializers,
-         -modernize-use-integer-sign-comparison,
         -modernize-use-nodiscard,
         -modernize-use-ranges,
-         -modernize-use-string-view,
         -modernize-use-std-numbers,
         -modernize-use-trailing-return-type,
         -performance-enum-size,
         -portability-avoid-pragma-once,
         -readability-function-cognitive-complexity,
+         -readability-function-size,
         -readability-identifier-length,
         -readability-magic-numbers,
         -readability-redundant-access-specifiers,
         -readability-redundant-parentheses,
         -readability-redundant-typename,
         -readability-simplify-boolean-expr,
-         -readability-trailing-comma,
         -readability-uppercase-literal-suffix,
         -readability-use-concise-preprocessor-directives'

@@ -43,8 +43,7 @@ jobs:
      - name: flawfinder_scan
        uses: david-a-wheeler/flawfinder@c4216b74cf2639ffa98503768bd6e4299b5440c9 # v2.0.20
        with:
-          # single_include/ is omitted: it is generated from include/ and would report every finding twice
-          arguments: '--sarif ./cmake ./docs ./include ./src ./tests ./tools'
+          arguments: '--sarif ./'
          output: 'flawfinder_results.sarif'

      - name: Upload analysis results to GitHub Security tab
@@ -90,6 +90,7 @@ cc_library(
        "include/nlohmann/detail/view/simd.hpp",
        "include/nlohmann/detail/view/string_ref.hpp",
        "include/nlohmann/detail/view/value.hpp",
+        "include/nlohmann/detail/view/view_mode.hpp",
        "include/nlohmann/json.hpp",
        "include/nlohmann/json_fwd.hpp",
        "include/nlohmann/json_literals.hpp",
@@ -151,7 +151,7 @@ The `json` class provides an API for manipulating a JSON value. To create a `jso
 ```cpp
 #include <fstream>
 #include <nlohmann/json.hpp>
-using nlohmann::json;
+using json = nlohmann::json;

 // ...

@@ -164,7 +164,7 @@ If using modules (enabled with `NLOHMANN_JSON_BUILD_MODULES`), this example beco
 import std;
 import nlohmann.json;

-using nlohmann::json;
+using json = nlohmann::json;

 // ...

@@ -842,7 +842,7 @@ assert(p == p2);
 To make this work with one of your types, you only need to provide two functions:

 ```cpp
-using nlohmann::json;
+using json = nlohmann::json;

 namespace ns {
    void to_json(json& j, const person& p) {
@@ -1257,7 +1257,7 @@ See the page [quality assurance](https://json.nlohmann.me/community/quality_assu
 #include <nlohmann/json.hpp>

 // for convenience
-using nlohmann::json;
+using json = nlohmann::json;
 ```

 to the files you want to process JSON and set the necessary switches to enable C++11 (e.g., `-std=c++11` for GCC and Clang).
@@ -113,15 +113,15 @@ basic_json(basic_json&& other) noexcept;

    ```mermaid
    flowchart TD
-        A(["initializer_list init"]) --> B{{"empty, or every element is a 2-element<br/>array whose first element is a string?"}}
-        B -->|"yes"| C{{"type_deduction"}}
-        B -->|"no"| D{{"type_deduction"}}
+        A(["initializer_list init"]) --> B{"empty, or every element is a 2-element<br/>array whose first element is a string?"}
+        B -->|"yes"| C{"type_deduction"}
+        B -->|"no"| D{"type_deduction"}
        C -->|"true"| OBJ["create object"]
-        C -->|"false"| E{{"manual_type"}}
+        C -->|"false"| E{"manual_type"}
        E -->|"object"| OBJ
        E -->|"array"| ARR["create array"]
        D -->|"true"| ARR
-        D -->|"false"| F{{"manual_type"}}
+        D -->|"false"| F{"manual_type"}
        F -->|"array"| ARR
        F -->|"object"| ERR["throw type_error.301"]
    ```
@@ -7,9 +7,7 @@ const_iterator begin() const noexcept;

 Returns an iterator to the first element.

-<div class="nj-fig-wrap" markdown>
--8<-- "images/range-begin-end.svg"
-</div>
+![Illustration from cppreference.com](../../images/range-begin-end.svg)

 ## Return value

@@ -6,9 +6,7 @@ const_iterator cbegin() const noexcept;

 Returns an iterator to the first element.

-<div class="nj-fig-wrap" markdown>
--8<-- "images/range-begin-end.svg"
-</div>
+![Illustration from cppreference.com](../../images/range-begin-end.svg)

 ## Return value

@@ -6,9 +6,7 @@ const_iterator cend() const noexcept;

 Returns an iterator to one past the last element.

-<div class="nj-fig-wrap" markdown>
--8<-- "images/range-begin-end.svg"
-</div>
+![Illustration from cppreference.com](../../images/range-begin-end.svg)

 ## Return value

@@ -6,9 +6,7 @@ const_reverse_iterator crbegin() const noexcept;

 Returns an iterator to the reverse-beginning; that is, the last element.

-<div class="nj-fig-wrap" markdown>
--8<-- "images/range-rbegin-rend.svg"
-</div>
+![Illustration from cppreference.com](../../images/range-rbegin-rend.svg)

 ## Return value

@@ -7,9 +7,7 @@ const_reverse_iterator crend() const noexcept;
 Returns an iterator to the reverse-end; that is, one before the first element. This element acts as a placeholder,
 attempting to access it results in undefined behavior.

-<div class="nj-fig-wrap" markdown>
--8<-- "images/range-rbegin-rend.svg"
-</div>
+![Illustration from cppreference.com](../../images/range-rbegin-rend.svg)

 ## Return value

@@ -7,9 +7,7 @@ const_iterator end() const noexcept;

 Returns an iterator to one past the last element.

-<div class="nj-fig-wrap" markdown>
--8<-- "images/range-begin-end.svg"
-</div>
+![Illustration from cppreference.com](../../images/range-begin-end.svg)

 ## Return value

@@ -45,7 +45,7 @@ Constant.
    #include <iostream>
    #include <nlohmann/json.hpp>
    
-    using nlohmann::json;
+    using json = nlohmann::json;
    
    int main()
    {
@@ -22,9 +22,7 @@ The parser callback distinguishes the following events:

 ## Examples

-<div class="nj-fig-wrap" markdown>
--8<-- "images/callback_events.svg"
-</div>
+![Example when certain parse events are triggered](../../images/callback_events.png)

 ??? example

@@ -23,9 +23,7 @@ table describes the values of the parameters `depth`, `event`, and `parsed`.
 | `parse_event_t::array_end`    | the parser read `]` and finished processing a JSON array  | depth of the parent of the JSON array     | the parsed JSON array            |
 | `parse_event_t::value`        | the parser finished reading a JSON value                  | depth of the value                        | the parsed JSON value            |

-<div class="nj-fig-wrap" markdown>
--8<-- "images/callback_events.svg"
-</div>
+![Example when certain parse events are triggered](../../images/callback_events.png)

 Discarding a value (i.e., returning `#!cpp false`) has different effects depending on the context in which function was
 called:
@@ -7,9 +7,7 @@ const_reverse_iterator rbegin() const noexcept;

 Returns an iterator to the reverse-beginning; that is, the last element.

-<div class="nj-fig-wrap" markdown>
--8<-- "images/range-rbegin-rend.svg"
-</div>
+![Illustration from cppreference.com](../../images/range-rbegin-rend.svg)

 ## Return value

@@ -8,9 +8,7 @@ const_reverse_iterator rend() const noexcept;
 Returns an iterator to the reverse-end; that is, one before the first element. This element acts as a placeholder,
 attempting to access it results in undefined behavior.

-<div class="nj-fig-wrap" markdown>
--8<-- "images/range-rbegin-rend.svg"
-</div>
+![Illustration from cppreference.com](../../images/range-rbegin-rend.svg)

 ## Return value

@@ -12,7 +12,7 @@ void erase(view_type array, I idx);
 std::size_t erase(const json_pointer& ptr);
 ```

-Only an **editable** document (`#!cpp Editable == true`, e.g. [`json_editable_document`](../json_editable_document.md))
+Only an **editable** document (`#!cpp view_mode::editable`, e.g. [`json_editable_document`](../json_editable_document.md))
 has `erase`; calling it on a read-only `basic_json_document` fails to compile (`#!cpp static_assert`).

 1. Removes every member of `object` whose key is `key` (see [Notes](#notes) on duplicate keys) and returns how many
@@ -3,7 +3,7 @@
 <small>Defined in header `<nlohmann/json_view.hpp>`</small>

 ```cpp
-template<typename BasicJsonType, bool Editable = false>
+template<typename BasicJsonType, view_mode Mode = view_mode::read_only>
 class basic_json_document;
 ```

@@ -20,9 +20,9 @@ is move-only: a copy would duplicate the whole index, the decoded-string buffer,
 enough in every use we know of. The index, the decoded strings, and the owned text live in one heap block that the
 document holds through a `#!cpp std::unique_ptr`; this is also why views survive a move of the document.

-With `#!cpp Editable == true`, the document also offers [`set`](set.md), [`push_back`](push_back.md),
+With `#!cpp Mode == view_mode::editable`, the document also offers [`set`](set.md), [`push_back`](push_back.md),
 [`insert`](insert.md), and [`erase`](erase.md) to change values in place, see [Edits](#edits) below. The source text
-itself is never written; a read-only document (`#!cpp Editable == false`, the default) does not carry any of the
+itself is never written; a read-only document (`#!cpp view_mode::read_only`, the default) does not carry any of the
 bookkeeping edits need, and calling any of them on one fails to compile (`#!cpp static_assert`).

 ## Template parameters
@@ -32,9 +32,10 @@ bookkeeping edits need, and calling any of them on one fails to compile (`#!cpp
    [`ordered_json`](../ordered_json.md). Only 64-bit `number_integer_t`/`number_unsigned_t` types are supported; this
    is checked with a `static_assert`.

-`Editable`
-:   whether the document supports [`set`](set.md), [`push_back`](push_back.md), [`insert`](insert.md), and
-    [`erase`](erase.md) (optional, `#!cpp false` by default). See [Edits](#edits) below.
+`Mode`
+:   a [`view_mode`](../view_mode.md): `#!cpp view_mode::editable` if the document supports [`set`](set.md),
+    [`push_back`](push_back.md), [`insert`](insert.md), and [`erase`](erase.md) (optional, `#!cpp view_mode::read_only`
+    by default). See [Edits](#edits) below.

 ## Specializations

@@ -47,7 +48,7 @@ bookkeeping edits need, and calling any of them on one fails to compile (`#!cpp

 ## Member types

- **view_type** - the type of view returned by [`root()`](root.md) (`#!cpp basic_json_view<BasicJsonType, Editable>`)
+- **view_type** - the type of view returned by [`root()`](root.md) (`#!cpp basic_json_view<BasicJsonType, Mode>`)
 - **value_t** - the JSON type enumeration, see [`basic_json::value_t`](../basic_json/value_t.md)
 - **image_check** - how [`load()`](load.md) validates an image (`full`, `bounds`, `none`), see [`image_check`](load.md#image_check)

@@ -80,15 +81,15 @@ bookkeeping edits need, and calling any of them on one fails to compile (`#!cpp
 ### Edits

 - [**set**](set.md) - replace a value, or set an object member, an array element, or the value a JSON pointer refers
-  to (`#!cpp Editable` documents only)
- [**push_back**](push_back.md) - append to an array (`#!cpp Editable` documents only)
- [**insert**](insert.md) - insert an element into an array before a given position (`#!cpp Editable` documents only)
+  to (editable documents only)
+- [**push_back**](push_back.md) - append to an array (editable documents only)
+- [**insert**](insert.md) - insert an element into an array before a given position (editable documents only)
 - [**erase**](erase.md) - remove an object member, an array element, or the value a JSON pointer refers to
-  (`#!cpp Editable` documents only)
+  (editable documents only)

 ## Edits

-An editable document (`#!cpp Editable == true`) can be changed after parsing, with [`set`](set.md),
+An editable document (`#!cpp view_mode::editable`) can be changed after parsing, with [`set`](set.md),
 [`push_back`](push_back.md), [`insert`](insert.md), and [`erase`](erase.md);
 [`json_editable_document`](../json_editable_document.md) and
 [`ordered_json_editable_document`](../ordered_json_editable_document.md) are the corresponding specializations. A few
@@ -5,7 +5,7 @@ template<typename I, typename V>
 view_type insert(view_type array, I idx, V&& value);
 ```

-Only an **editable** document (`#!cpp Editable == true`, e.g. [`json_editable_document`](../json_editable_document.md))
+Only an **editable** document (`#!cpp view_mode::editable`, e.g. [`json_editable_document`](../json_editable_document.md))
 has `insert`; calling it on a read-only `basic_json_document` fails to compile (`#!cpp static_assert`).

 Inserts `value` into `array` as a new element before position `idx`, which must not be past the end
@@ -55,10 +55,7 @@ validate with overload 2 first, if the original vector must survive a failed loa

 ## Exceptions

-On a big-endian target, throws [`type_error.320`](../../home/exceptions.md#jsonexceptiontype_error320) -- the same
-exception [`save()`](save.md#exceptions) throws there, since the image format is little-endian only.
-
-Otherwise throws [`parse_error.116`](../../home/exceptions.md#jsonexceptionparse_error116) if `image` is not one
+Throws [`parse_error.116`](../../home/exceptions.md#jsonexceptionparse_error116) if `image` is not one
 `save()` could have written, or fails the requested `check`:

 | message               | when                                                                                                |
@@ -95,6 +92,9 @@ are checked once, however many nodes refer to it.

 ## Notes

+**Little-endian targets only.** On a big-endian target, `load()` does not exist, just like
+[`save()`](save.md#notes): the image format is little-endian, so a call fails to compile.
+
 ### `image_check` { #image_check }

 ```cpp
@@ -13,7 +13,7 @@ editable, and it does not have to be `array`'s own document -- which is copied s
 source document afterward; a `BasicJsonType` value; or anything `BasicJsonType` can be constructed from (numbers,
 strings, `#!cpp bool`, `#!cpp nullptr`, containers, ...).

-Only an **editable** document (`#!cpp Editable == true`, e.g. [`json_editable_document`](../json_editable_document.md))
+Only an **editable** document (`#!cpp view_mode::editable`, e.g. [`json_editable_document`](../json_editable_document.md))
 has `push_back`; calling it on a read-only `basic_json_document` fails to compile (`#!cpp static_assert`).

 ## Template parameters
@@ -12,7 +12,7 @@ An edited document is written in its *current* state, with its values in documen
 parser would have produced them for that JSON text: a member [`set`](set.md) added goes at the end, an
 [`erase`](erase.md)d member leaves no trace, and a float that is not finite (NaN or positive/negative infinity)
 becomes null, the same substitution [`dump()`](../basic_json_view/dump.md) makes. The same document always saves to
-the same bytes -- also across `BasicJsonType` and `#!cpp Editable`, since the image reflects document order and
+the same bytes -- also across `BasicJsonType` and the [`view_mode`](../view_mode.md), since the image reflects document order and
 values only, not which specialization produced them.

 ## Return value
@@ -31,9 +31,6 @@ Throws [`type_error.320`](../../home/exceptions.md#jsonexceptiontype_error320) i
 [discarded](is_discarded.md) -- a default-constructed document, or one a failed [`parse()`](parse.md)/
 [`read()`](read.md) with `allow_exceptions == false` left discarded.

-On a big-endian target, throws `type_error.320` with a different message instead: the image format is little-endian
-only (see [Notes](#notes)).
-
 Throws [`out_of_range.416`](../../home/exceptions.md#jsonexceptionout_of_range416) if the node count, the text, or
 the decoded strings of the image would individually reach 4 GiB -- the same 32-bit offsets
 [`parse()`](parse.md#exceptions) and, for edits, [`set`](set.md)/[`push_back`](push_back.md) are already limited to.
@@ -44,9 +41,6 @@ the decoded strings of the image would individually reach 4 GiB -- the same 32-b
    [json.exception.type_error.320] cannot save a discarded json_document
    ```
    ```
-    [json.exception.type_error.320] json_document images need a little-endian target
-    ```
-    ```
    [json.exception.out_of_range.416] images of 4 GiB or more are not supported by json_document
    ```

@@ -70,9 +64,9 @@ else -- see [`load`'s Exceptions](load.md#exceptions).
    the *same* build on the *same* (little-endian) machine -- not as a long-term storage format. Keep the original
    JSON text if you need to read a saved document back with a future library version.

-**Little-endian only.** The image is written as raw little-endian bytes, with no byte-swapping. `save()` (and
-[`load`](load.md)) throw `type_error.320` on a big-endian target rather than silently produce bytes a big-endian
-reader could not interpret correctly.
+**Little-endian targets only.** The image is written as raw little-endian bytes, with no byte-swapping. On a
+big-endian target, `save()` and [`load`](load.md) do not exist: a call fails to compile rather than produce bytes a
+big-endian reader could not interpret correctly.

 ## Examples

@@ -18,7 +18,7 @@ template<typename V>
 view_type set(const json_pointer& ptr, V&& value);
 ```

-Only an **editable** document (`#!cpp Editable == true`, e.g. [`json_editable_document`](../json_editable_document.md))
+Only an **editable** document (`#!cpp view_mode::editable`, e.g. [`json_editable_document`](../json_editable_document.md))
 has `set`; calling it on a read-only `basic_json_document` fails to compile (`#!cpp static_assert`).

 1. Replaces the value `target` refers to with `value`.
@@ -3,7 +3,7 @@
 <small>Defined in header `<nlohmann/json_view.hpp>`</small>

 ```cpp
-template<typename BasicJsonType, bool Editable = false>
+template<typename BasicJsonType, view_mode Mode = view_mode::read_only>
 class basic_json_view;
 ```

@@ -37,7 +37,7 @@ Moving the document itself does not invalidate its views: the index is heap-allo
 `#!cpp operator ValueType()`), and no `#!cpp get_ptr()` or `#!cpp get_ref()`; see [`get`](get.md).

 `basic_json_view` itself is always read-only -- it never has a `set` or `push_back` of its own. A view of an
-**editable** document (`#!cpp Editable == true`) sees every edit made through
+**editable** document (`#!cpp view_mode::editable`) sees every edit made through
 [`basic_json_document::set`](../basic_json_document/set.md) and
 [`basic_json_document::push_back`](../basic_json_document/push_back.md): once a value is changed, every view that
 still refers to it -- including ones taken before the change -- reads the new value. See
@@ -49,9 +49,10 @@ still refers to it -- including ones taken before the change -- reads the new va
 :   a specialization of [`basic_json`](../basic_json/index.md), matching the
    [`basic_json_document`](../basic_json_document/index.md) the view was taken from.

-`Editable`
-:   whether the view is of an editable document, matching the [`basic_json_document`](../basic_json_document/index.md)
-    it was taken from (optional, `#!cpp false` by default). See [Edits](../basic_json_document/index.md#edits).
+`Mode`
+:   a [`view_mode`](../view_mode.md): whether the view is of an editable document, matching the
+    [`basic_json_document`](../basic_json_document/index.md) it was taken from (optional, `#!cpp view_mode::read_only` by
+    default). See [Edits](../basic_json_document/index.md#edits).

 ## Specializations

@@ -3,7 +3,7 @@
 <small>Defined in header `<nlohmann/json_view.hpp>`</small>

 ```cpp
-using json_editable_document = basic_json_document<json, true>;
+using json_editable_document = basic_json_document<json, view_mode::editable>;
 ```

 This type is an **editable** [`basic_json_document`](basic_json_document/index.md) of the default
@@ -3,7 +3,7 @@
 <small>Defined in header `<nlohmann/json_view.hpp>`</small>

 ```cpp
-using json_editable_view = basic_json_view<json, true>;
+using json_editable_view = basic_json_view<json, view_mode::editable>;
 ```

 This type is a [`basic_json_view`](basic_json_view/index.md) of a value of a
@@ -38,7 +38,7 @@ Therefore, assertions can be switched off by defining `NDEBUG`.
    ```cpp
    #include <nlohmann/json.hpp>
    
-    using nlohmann::json;
+    using json = nlohmann::json;
    
    int main()
    {
@@ -64,7 +64,7 @@ Therefore, assertions can be switched off by defining `NDEBUG`.
    
    #include <nlohmann/json.hpp>
    
-    using nlohmann::json;
+    using json = nlohmann::json;
    
    int main()
    {
@@ -79,7 +79,7 @@ The default value is `0` (disabled — existing behavior is preserved).
    ```cpp
    #include <nlohmann/json.hpp>

-    using nlohmann::json;
+    using json = nlohmann::json;

    int main()
    {
@@ -98,7 +98,7 @@ The default value is `0` (disabled — existing behavior is preserved).
    #define JSON_BRACE_INIT_COPY_SEMANTICS 1
    #include <nlohmann/json.hpp>

-    using nlohmann::json;
+    using json = nlohmann::json;

    int main()
    {
@@ -54,7 +54,7 @@ The default value is `0` (disabled, the deprecated functions can still be called
    ```cpp
    #include <nlohmann/json.hpp>

-    using nlohmann::json;
+    using json = nlohmann::json;

    int main()
    {
@@ -72,7 +72,7 @@ The default value is `0` (disabled, the deprecated functions can still be called
    #define JSON_DELETE_DEPRECATED_FUNCTIONS 1
    #include <nlohmann/json.hpp>

-    using nlohmann::json;
+    using json = nlohmann::json;

    int main()
    {
@@ -39,7 +39,7 @@ The default value is `0`.
    #define JSON_DISABLE_ENUM_SERIALIZATION 1
    #include <nlohmann/json.hpp>

-    using nlohmann::json;
+    using json = nlohmann::json;

    enum class Choice
    {
@@ -66,7 +66,7 @@ The default value is `0`.
    #define JSON_DISABLE_ENUM_SERIALIZATION 1
    #include <nlohmann/json.hpp>

-    using nlohmann::json;
+    using json = nlohmann::json;

    enum class Choice
    {
@@ -99,7 +99,7 @@ The default value is `0`.
    #define JSON_DISABLE_ENUM_SERIALIZATION 1
    #include <nlohmann/json.hpp>

-    using nlohmann::json;
+    using json = nlohmann::json;

    enum class Choice
    {
@@ -92,7 +92,7 @@ The default value is `0`: streams are scanned in bulk.
    #include <sstream>
    #include <nlohmann/json.hpp>

-    using nlohmann::json;
+    using json = nlohmann::json;

    int main()
    {
@@ -115,7 +115,7 @@ The default value is `0`: streams are scanned in bulk.
    #include <sstream>
    #include <nlohmann/json.hpp>

-    using nlohmann::json;
+    using json = nlohmann::json;

    int main()
    {
@@ -72,7 +72,7 @@ The default value is `0` (disabled — existing behavior is preserved).
    ```cpp
    #include <nlohmann/json.hpp>

-    using nlohmann::json;
+    using json = nlohmann::json;

    int main()
    {
@@ -89,7 +89,7 @@ The default value is `0` (disabled — existing behavior is preserved).
    #define JSON_DISABLE_TUPLE_REFERENCE_CONVERSION 1
    #include <nlohmann/json.hpp>

-    using nlohmann::json;
+    using json = nlohmann::json;

    int main()
    {
@@ -73,7 +73,7 @@ The default value is `0`: the file is locked once and read with the unlocked std
    #include <cstdio>
    #include <nlohmann/json.hpp>

-    using nlohmann::json;
+    using json = nlohmann::json;

    int main()
    {
@@ -92,7 +92,7 @@ The default value is `0`: the file is locked once and read with the unlocked std
    #include <cstdio>
    #include <nlohmann/json.hpp>

-    using nlohmann::json;
+    using json = nlohmann::json;

    int main()
    {
@@ -61,7 +61,7 @@ By default, `#!cpp JSON_NO_SIMD` is not defined, and vector instructions are use
    #include <iostream>
    #include <nlohmann/json.hpp>

-    using nlohmann::json;
+    using json = nlohmann::json;

    int main()
    {
@@ -94,7 +94,7 @@ The default value is `0` (disabled — existing behavior is preserved).
    #include <sstream>
    #include <nlohmann/json.hpp>

-    using nlohmann::json;
+    using json = nlohmann::json;

    int main()
    {
@@ -115,7 +115,7 @@ The default value is `0` (disabled — existing behavior is preserved).
    #include <sstream>
    #include <nlohmann/json.hpp>

-    using nlohmann::json;
+    using json = nlohmann::json;

    int main()
    {
@@ -64,7 +64,7 @@ The default value is `0` (disabled, the behavior of version 3.12.0 and earlier i
    ```cpp
    #include <nlohmann/json.hpp>

-    using nlohmann::json;
+    using json = nlohmann::json;

    int main()
    {
@@ -81,7 +81,7 @@ The default value is `0` (disabled, the behavior of version 3.12.0 and earlier i
    #define JSON_STRICT_BINARY_UTF8 1
    #include <nlohmann/json.hpp>

-    using nlohmann::json;
+    using json = nlohmann::json;

    int main()
    {
@@ -92,7 +92,7 @@ The default value is `0` (disabled — existing behavior is preserved).
    ```cpp
    #include <nlohmann/json.hpp>

-    using nlohmann::json;
+    using json = nlohmann::json;

    int main()
    {
@@ -109,7 +109,7 @@ The default value is `0` (disabled — existing behavior is preserved).
    #define JSON_STRICT_NUL_HANDLING 1
    #include <nlohmann/json.hpp>

-    using nlohmann::json;
+    using json = nlohmann::json;

    int main()
    {
@@ -77,7 +77,7 @@ The default value is `0` (disabled — existing behavior is preserved).
    #include <map>
    #include <nlohmann/json.hpp>

-    using nlohmann::json;
+    using json = nlohmann::json;

    enum TaskState { TS_STOPPED, TS_RUNNING, TS_COMPLETED };

@@ -105,7 +105,7 @@ The default value is `0` (disabled — existing behavior is preserved).
    #include <map>
    #include <nlohmann/json.hpp>

-    using nlohmann::json;
+    using json = nlohmann::json;

    enum TaskState { TS_STOPPED, TS_RUNNING, TS_COMPLETED };

@@ -3,7 +3,7 @@
 <small>Defined in header `<nlohmann/json_view.hpp>`</small>

 ```cpp
-using ordered_json_editable_document = basic_json_document<ordered_json, true>;
+using ordered_json_editable_document = basic_json_document<ordered_json, view_mode::editable>;
 ```

 This type is an **editable** [`basic_json_document`](basic_json_document/index.md) of the
@@ -3,7 +3,7 @@
 <small>Defined in header `<nlohmann/json_view.hpp>`</small>

 ```cpp
-using ordered_json_editable_view = basic_json_view<ordered_json, true>;
+using ordered_json_editable_view = basic_json_view<ordered_json, view_mode::editable>;
 ```

 This type is a [`basic_json_view`](basic_json_view/index.md) of a value of an
@@ -0,0 +1,80 @@
+# <small>nlohmann::</small>view_mode
+
+<small>Defined in header `<nlohmann/json_view.hpp>`</small>
+
+```cpp
+enum class view_mode : std::uint8_t
+{
+    read_only,
+    editable
+};
+```
+
+The second template parameter of [`basic_json_document`](basic_json_document/index.md) and
+[`basic_json_view`](basic_json_view/index.md): whether a document can be changed after parsing, and whether a view is
+of such a document.
+
+`read_only`
+:   the default: the document is parsed once and then only read. It carries none of the bookkeeping edits need, and
+    calling [`set`](basic_json_document/set.md), [`push_back`](basic_json_document/push_back.md),
+    [`insert`](basic_json_document/insert.md), or [`erase`](basic_json_document/erase.md) on it fails to compile.
+
+`editable`
+:   the document also offers [`set`](basic_json_document/set.md), [`push_back`](basic_json_document/push_back.md),
+    [`insert`](basic_json_document/insert.md), and [`erase`](basic_json_document/erase.md); its views see every edit,
+    see [Edits](basic_json_document/index.md#edits).
+
+The shortcuts name both modes: [`json_document`](json_document.md) and [`json_view`](json_view.md) are read-only,
+[`json_editable_document`](json_editable_document.md) and [`json_editable_view`](json_editable_view.md) are editable
+(and likewise for `ordered_json`).
+
+## Notes
+
+The mode is part of the view's type, and there is no conversion between the two modes: a read-only view reads a
+container in place, while a view of an editable document follows the links that edits leave behind. A function that
+accepts views therefore names the modes it accepts in its signature:
+
+```cpp
+// views of editable documents only
+template<typename BasicJsonType>
+void f(basic_json_view<BasicJsonType, view_mode::editable> v);
+
+// views of read-only documents only
+template<typename BasicJsonType>
+void f(basic_json_view<BasicJsonType, view_mode::read_only> v);
+
+// either
+template<typename BasicJsonType, view_mode Mode>
+void f(basic_json_view<BasicJsonType, Mode> v);
+```
+
+A function that takes a [`json_view`](json_view.md) accepts neither an [`ordered_json_view`](ordered_json_view.md)
+nor a [`json_editable_view`](json_editable_view.md). Views of the two modes still compare with
+[`operator==`](basic_json_view/operator_eq.md).
+
+## Examples
+
+??? example
+
+    The example below shows a function template that accepts the views of both modes, and one that accepts only
+    views of editable documents.
+
+    ```cpp
+    --8<-- "examples/view_mode.cpp"
+    ```
+
+    Output:
+
+    ```
+    --8<-- "examples/view_mode.output"
+    ```
+
+## See also
+
+- [basic_json_document](basic_json_document/index.md) - a parsed JSON text
+- [basic_json_view](basic_json_view/index.md) - a handle to one value of a document
+- [json_editable_document](json_editable_document.md) - an editable document of `json`
+
+## Version history
+
+Added in version 3.13.0.
@@ -188,13 +188,10 @@ Note: Some modern features (like C++20 ranges or filesystem support) may be disa
        ```

 - [x] The code is checked with the latest [Cppcheck](https://cppcheck.sourceforge.io) with all warnings enabled.
- [x] The code is checked with the latest [Clang Static Analyzer](https://clang-analyzer.llvm.org) with 52 enabled
-  checkers.
+- [x] The code is checked with the latest [Clang Static Analyzer](https://clang-analyzer.llvm.org) with 89 enabled
+  rules.
 - [x] The code is checked with [Infer](https://fbinfer.com).
 - [x] The code is checked with [Codacy](https://app.codacy.com/gh/nlohmann/json/dashboard).
- [x] The code is scanned with [CodeQL](https://codeql.github.com), [Semgrep](https://semgrep.dev), and
-  [Flawfinder](https://dwheeler.com/flawfinder/) on every push and pull request and on a schedule; the findings are
-  reported to GitHub's code scanning.

 ## Dynamic analysis

@@ -207,8 +204,6 @@ Note: Some modern features (like C++20 ranges or filesystem support) may be disa
 - [x] The test suite is executed with [Valgrind](https://valgrind.org) (Memcheck) to detect memory leaks.
 - [x] The test suite is executed with [Sanitizers](https://github.com/google/sanitizers) (address sanitizer, undefined
  behavior sanitizer, integer overflow detection, nullability violations).
- [x] The fuzz targets are run with [CIFuzz](https://google.github.io/oss-fuzz/getting-started/continuous-integration/)
-  on every pull request to catch regressions before they are merged.

 ## Dependencies

@@ -228,8 +223,6 @@ Note: Some modern features (like C++20 ranges or filesystem support) may be disa
  No release is made while such an alert is open.
 - [x] Third-party code included in the repository for testing, such as [doctest](https://github.com/doctest/doctest),
  is updated manually.
- [x] The repository is evaluated with the [OpenSSF Scorecard](https://securityscorecards.dev) on a schedule and on
-  every push to the default branch, and the results are reported to GitHub's code scanning.

 ## Style check

@@ -265,21 +258,4 @@ Note: Some modern features (like C++20 ranges or filesystem support) may be disa
 - [x] The library is tested against relevant CMake versions:
  - CMake 3.5 (the earliest supported)
  - CMake 3.31.6 (the latest 3.x release)
-  - CMake 4.0.0 (the first 4.x release)
-!!! success "Requirement: Other build systems"
-
-    The library can be used with build systems and package managers other than CMake.
-
- [x] The library can be consumed with [Meson](https://json.nlohmann.me/integration/package_managers/) and the Swift
-  Package Manager; the installation with Meson and the resolution of `Package.swift` are tested in the CI.
-
-!!! success "Requirement: Reproducible and verifiable builds"
-
-    The library can be built and tested without network access or a Git checkout, and its licensing is machine-readable.
-
- [x] The test suite is executed from an exported source tree without the `.git` directory and with the test data
-  being available offline.
- [x] The test suite is executed without the tests that change installed files to check that builds are reproducible.
- [x] The repository is checked for compliance with the [REUSE specification](https://reuse.software) so that the
-  license and copyright of every file is machine-readable.
- [x] The documentation is built with warnings treated as errors, and its links are checked regularly.
+  - CMake 4.0.0 (a very recent release)
@@ -1,739 +0,0 @@
-/* nlohmann/json brand for Material for MkDocs (values from brand/kit/tokens.css) */
-
-@font-face {
-    font-family: "Inter";
-    src: url("fonts/Inter.woff2") format("woff2");
-    font-weight: 100 900;
-    font-display: swap;
-}
-@font-face {
-    font-family: "Inter";
-    src: url("fonts/Inter-Italic.woff2") format("woff2");
-    font-style: italic;
-    font-weight: 100 900;
-    font-display: swap;
-}
-@font-face {
-    font-family: "JetBrains Mono";
-    src: url("fonts/JetBrainsMono.woff2") format("woff2");
-    font-weight: 100 800;
-    font-display: swap;
-}
-@font-face {
-    font-family: "JetBrains Mono";
-    src: url("fonts/JetBrainsMono-Italic.woff2") format("woff2");
-    font-style: italic;
-    font-weight: 400;
-    font-display: swap;
-}
-
-:root {
-    --md-text-font: "Inter";
-    --md-code-font: "JetBrains Mono";
-}
-
-/* light */
-[data-md-color-scheme="default"] {
-    --nj-blue: #1747a6;
-    --nj-blue-deep: #10357d;
-    --nj-blue-soft: #eaf1fd;
-    --nj-band: #1747a6;
-    --nj-red: #d93a3f;
-    --nj-red-soft: #fdeced;
-    --nj-string: #b4322a;
-    --nj-comment: #646d7a;
-
-    --md-primary-fg-color: var(--nj-band);
-    --md-primary-fg-color--light: #1d55c4;
-    --md-primary-fg-color--dark: #10357d;
-    --md-accent-fg-color: var(--nj-blue-deep);
-    --md-accent-fg-color--transparent: rgba(23, 71, 166, .1);
-    --md-typeset-a-color: var(--nj-blue);
-    --md-default-fg-color: #0f1419;
-    --md-default-fg-color--light: #4a515c;
-    --md-default-fg-color--lighter: #8a919c;
-    --md-default-fg-color--lightest: #e3e6eb;
-    --md-typeset-color: #0f1419;
-    --md-code-bg-color: #f5f7fa;
-    --md-code-fg-color: #0f1419;
-}
-
-/* dark */
-[data-md-color-scheme="slate"] {
-    --nj-blue: #7aa7f5;
-    --nj-blue-deep: #a9c6f8;
-    --nj-blue-soft: #16233b;
-    --nj-band: #173e8c;
-    --nj-red: #f06a6e;
-    --nj-red-soft: #3a1c1e;
-    --nj-string: #f08a7e;
-    --nj-comment: #8b929e;
-
-    --md-hue: 220;
-    --md-primary-fg-color: var(--nj-band);
-    --md-primary-fg-color--light: #163f93;
-    --md-primary-fg-color--dark: #0c2556;
-    --md-accent-fg-color: var(--nj-blue-deep);
-    --md-accent-fg-color--transparent: rgba(122, 167, 245, .12);
-    --md-typeset-a-color: var(--nj-blue);
-    --md-default-bg-color: #0f1218;
-    --md-default-fg-color: #f2f4f7;
-    --md-default-fg-color--light: #b3b9c4;
-    --md-default-fg-color--lighter: #7b828e;
-    --md-default-fg-color--lightest: #272c36;
-    --md-typeset-color: #f2f4f7;
-    --md-code-bg-color: #171b23;
-    --md-code-fg-color: #f2f4f7;
-    --md-footer-bg-color: #0b0e13;
-    --md-footer-bg-color--dark: #08090d;
-}
-
-/* syntax colours (all at least 4.5:1 on the code panel in both schemes) */
-[data-md-color-scheme="default"] {
-    --nj-hl-keyword: #1747a6;
-    --nj-hl-type: #0d6e72;
-    --nj-hl-function: #6b3fb8;
-    --nj-hl-string: #23793a;
-    --nj-hl-escape: #0f5d2a;
-    --nj-hl-key: #10357d;
-    --nj-hl-number: #b04a07;
-    --nj-hl-preproc: #a3247a;
-}
-[data-md-color-scheme="slate"] {
-    --nj-hl-keyword: #7aa7f5;
-    --nj-hl-type: #4fd1c5;
-    --nj-hl-function: #c4a3ff;
-    --nj-hl-string: #7ed491;
-    --nj-hl-escape: #b2ecc0;
-    --nj-hl-key: #a9c6f8;
-    --nj-hl-number: #f5a65b;
-    --nj-hl-preproc: #f48fc8;
-}
-.md-typeset .highlight :is(.k, .kd, .kn, .kr, .kp, .kv, .ow) { color: var(--nj-hl-keyword); font-weight: 600; }
-.md-typeset .highlight :is(.kt, .nc, .nn, .na) { color: var(--nj-hl-type); }
-.md-typeset .highlight :is(.nf, .fm, .nb, .bp) { color: var(--nj-hl-function); }
-.md-typeset .highlight :is(.s, .s1, .s2, .sb, .sc, .sd, .sh, .sx, .sr, .ss, .sa, .dl, .cpf) { color: var(--nj-hl-string); }
-.md-typeset .highlight :is(.se, .si) { color: var(--nj-hl-escape); font-weight: 600; }
-.md-typeset .highlight .nt { color: var(--nj-hl-key); }
-.md-typeset .highlight :is(.m, .mi, .mf, .mh, .mo, .mb, .il, .kc) { color: var(--nj-hl-number); }
-.md-typeset .highlight .kc { font-weight: 500; }
-.md-typeset .highlight .cp { color: var(--nj-hl-preproc); }
-.md-typeset .highlight :is(.c, .c1, .cm, .ch, .cs) { color: var(--nj-comment); font-style: italic; }
-.md-typeset .highlight :is(.o, .p) { color: var(--md-default-fg-color--light); }
-.md-typeset .highlight :is(.n, .nx, .nv, .no, .ni, .nl, .py) { color: var(--md-code-fg-color); }
-.md-typeset .highlight .err { color: inherit; background: none; }
-
-/* typography: Inter with cv11/ss03, bold headlines with negative tracking */
-body {
-    font-feature-settings: "cv11", "ss03";
-}
-.md-typeset {
-    font-size: .85rem;          /* 17 px body */
-    line-height: 1.65;
-}
-.md-typeset h1 {
-    color: var(--md-typeset-color);
-    font-weight: 800;
-    letter-spacing: -.035em;
-    line-height: 1.1;
-}
-.md-typeset h2 {
-    font-weight: 800;
-    letter-spacing: -.025em;
-    line-height: 1.15;
-}
-.md-typeset h3 {
-    font-weight: 700;
-    letter-spacing: -.015em;
-}
-.md-typeset table:not([class]) {
-    font-variant-numeric: tabular-nums;
-}
-
-/* header and tabs: one blue band with the faint syntax pattern; wordmark instead of the site name.
-   A veil over the tile keeps the glyphs from running through the navigation text; the hero shows the pattern at full strength. */
-.md-header, .md-tabs {
-    --nj-veil: linear-gradient(color-mix(in srgb, var(--md-primary-fg-color) 62%, transparent), color-mix(in srgb, var(--md-primary-fg-color) 62%, transparent));
-    background-color: var(--md-primary-fg-color);
-    background-image: var(--nj-veil), url("pattern-on-blue.svg");
-    background-size: auto, 160px 160px;
-    background-position: 0 0, 0 0;
-}
-.md-tabs {
-    background-position: 0 0, 0 -48px;     /* continue the header's tile */
-}
-.md-header__button.md-logo img {
-    width: auto;
-    height: 1.5rem;
-}
-.md-header__topic:first-child .md-ellipsis {   /* the wordmark replaces the site name at every width */
-    display: none;
-}
-@media screen and (max-width: 76.234375em) {   /* Material hides the header logo here: show the wordmark on phones, too */
-    .md-header__button.md-logo {
-        display: block;
-        margin: 0 0 0 .2rem;
-        padding: .4rem .2rem;
-    }
-    .md-header__button[for="__drawer"] {
-        order: -1;
-    }
-}
-.md-nav__button.md-logo img {
-    width: auto;
-    height: 1.4rem;
-}
-
-/* shapes: 6 px corners on blocks, 4 px on inline code */
-.md-typeset pre > code, .md-typeset .highlight, .md-typeset .highlighttable,
-.md-typeset .admonition, .md-typeset details, .md-typeset .tabbed-set,
-.md-typeset .grid.cards > ul > li, .md-typeset .md-button {
-    border-radius: 6px;
-}
-.md-typeset code {
-    border-radius: 4px;
-}
-
-/* inline code: the font alone marks it, no grey box; linked code keeps the link colour */
-.md-typeset :not(pre) > code {
-    padding: 0;
-    background-color: transparent;
-    box-shadow: none;
-    color: inherit;
-    font-size: .88em;
-}
-.md-typeset .highlight pre > code, .md-typeset .highlighttable {
-    border: 1px solid var(--md-default-fg-color--lightest);
-}
-
-/* callouts: 3 px left border; note/info/tip in blue on blue-soft, danger/bug in red on red-soft */
-.md-typeset .admonition, .md-typeset details {
-    border-width: 0 0 0 3px;
-    box-shadow: none;
-    font-size: .8rem;
-}
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-    }
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-    margin-bottom: 4.8rem;      /* 96 px */
-}
-
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-    --md-mermaid-font-family: var(--md-text-font-family), sans-serif;
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-
-/* ---- polish pass ---- */
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-.nj-fig .fg-note--r { text-anchor: end; }
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-.nj-fig .fg-leg { font-size: 15px; }
-.nj-fig { --cb-os: #4eb05a; --cb-oe: #1a6b34; --cb-k: #e5534b; --cb-as: #f0c000; --cb-ae: #b07d00; --cb-v: #1f6fd1; }
-[data-md-color-scheme="slate"] .nj-fig { --cb-os: #7ee787; --cb-oe: #2ea043; --cb-k: #ff7b72; --cb-as: #f2cc60; --cb-ae: #c69026; --cb-v: #58a6ff; }
-.nj-fig .cb-os { fill: var(--cb-os); }
-.nj-fig .cb-oe { fill: var(--cb-oe); }
-.nj-fig .cb-k { fill: var(--cb-k); }
-.nj-fig .cb-as { fill: var(--cb-as); }
-.nj-fig .cb-ae { fill: var(--cb-ae); }
-.nj-fig .cb-v { fill: var(--cb-v); }
-.md-typeset img[src*="json-light"], .md-typeset img[src*="json-dark"] {
-    border-radius: 8px;
-}
-.md-typeset img {
-    max-width: 100%;
-    height: auto;
-}
-
-/* home page: content uses the same column as every other page */
-body:has(.nj-hero) .md-content {
-    max-width: none;
-    margin: 0;
-}
-.md-typeset .grid.cards {
-    width: auto;
-}
-
-/* 404 page (overrides/404.html) */
-.nj-404 {
-    max-width: 30rem;
-    padding: 2rem 0 3rem;
-}
-.nj-404__code {
-    margin: 0 0 .4rem;
-    color: var(--nj-blue);
-    font-family: var(--md-code-font-family);
-    font-size: .8rem;
-    font-weight: 500;
-}
-.md-typeset .nj-404 h1 {
-    margin-bottom: .8rem;
-}
-.nj-404 .md-button {
-    margin: .4rem .4rem 0 0;
-}
-
-/* touch targets and phones */
-@media screen and (max-width: 59.984375em) {
-    .md-nav__link {
-        padding-block: .2rem;
-    }
-}
-@media screen and (max-width: 29.984375em) {
-    .md-typeset h1 {
-        font-size: 1.7em;
-    }
-    .md-typeset .highlight pre > code {
-        font-size: .68rem;
-    }
-}
@@ -1 +0,0 @@
-<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><g font-family='Menlo,monospace' font-size='26' font-weight='600' fill='#ffffff' fill-opacity='0.10'><text x='14' y='34'>{</text><text x='92' y='22'>]</text><text x='136' y='60'>:</text><text x='52' y='82'>[</text><text x='118' y='112'>,</text><text x='20' y='140'>}</text><text x='78' y='150'>:</text><text x='140' y='158'>{</text></g></svg>
@@ -2,7 +2,7 @@
 #include <iomanip>
 #include <nlohmann/json.hpp>

-using nlohmann::json;
+using json = nlohmann::json;

 int main()
 {
@@ -2,7 +2,7 @@
 #include <vector>
 #include <nlohmann/json.hpp>

-using nlohmann::json;
+using json = nlohmann::json;

 int main()
 {
@@ -2,19 +2,19 @@
 #include <iomanip>
 #include <nlohmann/json.hpp>

-using nlohmann::json;
+using json = nlohmann::json;

 int main()
 {
    // a valid JSON text
-    const auto* valid_text = R"(
+    auto valid_text = R"(
    {
        "numbers": [1, 2, 3]
    }
    )";

    // an invalid JSON text
-    const auto* invalid_text = R"(
+    auto invalid_text = R"(
    {
        "strings": ["extra", "comma", ]
    }
@@ -2,7 +2,7 @@
 #include <string>
 #include <nlohmann/json.hpp>

-using nlohmann::json;
+using json = nlohmann::json;

 int main()
 {
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json.hpp>

-using nlohmann::json;
+using json = nlohmann::json;

 int main()
 {
@@ -2,9 +2,9 @@
 #include <iomanip>
 #include <nlohmann/json.hpp>

-using nlohmann::json;
+using json = nlohmann::json;

 int main()
 {
-    std::cout << std::boolalpha << std::is_same<std::vector<json>, json::array_t>::value << '\n';
+    std::cout << std::boolalpha << std::is_same<std::vector<json>, json::array_t>::value << std::endl;
 }
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json.hpp>

-using nlohmann::json;
+using json = nlohmann::json;
 using namespace nlohmann::literals;

 int main()
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json.hpp>

-using nlohmann::json;
+using json = nlohmann::json;
 using namespace nlohmann::literals;

 int main()
@@ -3,7 +3,7 @@
 #include <nlohmann/json.hpp>

 using namespace std::string_view_literals;
-using nlohmann::json;
+using json = nlohmann::json;

 int main()
 {
@@ -3,7 +3,7 @@
 #include <nlohmann/json.hpp>

 using namespace std::string_view_literals;
-using nlohmann::json;
+using json = nlohmann::json;

 int main()
 {
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json.hpp>

-using nlohmann::json;
+using json = nlohmann::json;

 int main()
 {
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json.hpp>

-using nlohmann::json;
+using json = nlohmann::json;

 int main()
 {
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json.hpp>

-using nlohmann::json;
+using json = nlohmann::json;

 int main()
 {
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json.hpp>

-using nlohmann::json;
+using json = nlohmann::json;

 int main()
 {
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json.hpp>

-using nlohmann::json;
+using json = nlohmann::json;

 int main()
 {
@@ -1,8 +1,8 @@
 #include <iostream>
 #include <nlohmann/json.hpp>

-using nlohmann::json;
-using nlohmann::ordered_json;
+using json = nlohmann::json;
+using ordered_json = nlohmann::ordered_json;

 int main()
 {
@@ -8,7 +8,7 @@
 #include <valarray>
 #include <nlohmann/json.hpp>

-using nlohmann::json;
+using json = nlohmann::json;

 int main()
 {
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json.hpp>

-using nlohmann::json;
+using json = nlohmann::json;

 int main()
 {
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json.hpp>

-using nlohmann::json;
+using json = nlohmann::json;

 int main()
 {
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json.hpp>

-using nlohmann::json;
+using json = nlohmann::json;

 int main()
 {
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json.hpp>

-using nlohmann::json;
+using json = nlohmann::json;

 int main()
 {
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json.hpp>

-using nlohmann::json;
+using json = nlohmann::json;

 int main()
 {
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json.hpp>

-using nlohmann::json;
+using json = nlohmann::json;

 int main()
 {
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json.hpp>

-using nlohmann::json;
+using json = nlohmann::json;

 int main()
 {
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json.hpp>

-using nlohmann::json;
+using json = nlohmann::json;

 int main()
 {
@@ -2,7 +2,7 @@
 #include <nlohmann/json.hpp>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json_document;
+using json_document = nlohmann::json_document;

 int main()
 {
@@ -2,7 +2,7 @@
 #include <utility>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json_document;
+using json_document = nlohmann::json_document;

 int main()
 {
@@ -1,9 +1,9 @@
 #include <iostream>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json;
-using nlohmann::json_editable_document;
-using nlohmann::json_editable_view;
+using json = nlohmann::json;
+using json_editable_document = nlohmann::json_editable_document;
+using json_editable_view = nlohmann::json_editable_view;

 int main()
 {
@@ -1,9 +1,9 @@
 #include <iostream>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json;
-using nlohmann::json_editable_document;
-using nlohmann::json_editable_view;
+using json = nlohmann::json;
+using json_editable_document = nlohmann::json_editable_document;
+using json_editable_view = nlohmann::json_editable_view;

 int main()
 {
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json_document;
+using json_document = nlohmann::json_document;

 int main()
 {
@@ -4,8 +4,8 @@
 #include <vector>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json;
-using nlohmann::json_document;
+using json = nlohmann::json;
+using json_document = nlohmann::json_document;
 using image_check = json_document::image_check;

 int main()
@@ -2,7 +2,7 @@
 #include <string>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json_document;
+using json_document = nlohmann::json_document;

 int main()
 {
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json_document;
+using json_document = nlohmann::json_document;

 int main()
 {
@@ -2,7 +2,7 @@
 #include <string>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json_document;
+using json_document = nlohmann::json_document;

 int main()
 {
@@ -3,7 +3,7 @@
 #include <nlohmann/json.hpp>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json_document;
+using json_document = nlohmann::json_document;

 int main()
 {
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json_document;
+using json_document = nlohmann::json_document;

 json_document parse_from_temporary_buffer()
 {
@@ -2,7 +2,7 @@
 #include <vector>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json_document;
+using json_document = nlohmann::json_document;

 int main()
 {
@@ -1,8 +1,8 @@
 #include <iostream>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json;
-using nlohmann::json_editable_document;
+using json = nlohmann::json;
+using json_editable_document = nlohmann::json_editable_document;

 int main()
 {
@@ -3,7 +3,7 @@
 #include <vector>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json_document;
+using json_document = nlohmann::json_document;

 int main()
 {
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json_document;
+using json_document = nlohmann::json_document;

 int main()
 {
@@ -4,7 +4,7 @@
 #include <vector>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json_document;
+using json_document = nlohmann::json_document;

 int main()
 {
@@ -1,9 +1,9 @@
 #include <iostream>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json;
-using nlohmann::json_editable_document;
-using nlohmann::json_editable_view;
+using json = nlohmann::json;
+using json_editable_document = nlohmann::json_editable_document;
+using json_editable_view = nlohmann::json_editable_view;

 int main()
 {
@@ -3,7 +3,7 @@
 #include <string>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json_document;
+using json_document = nlohmann::json_document;

 int main()
 {
@@ -2,7 +2,7 @@
 #include <string>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json_document;
+using json_document = nlohmann::json_document;

 int main()
 {
@@ -1,8 +1,8 @@
 #include <iostream>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json_document;
-using nlohmann::json_view;
+using json_document = nlohmann::json_document;
+using json_view = nlohmann::json_view;

 int main()
 {
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json_document;
+using json_document = nlohmann::json_document;
 using json_pointer = nlohmann::json::json_pointer;

 int main()
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json_document;
+using json_document = nlohmann::json_document;

 int main()
 {
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json_document;
+using json_document = nlohmann::json_document;

 int main()
 {
@@ -2,8 +2,8 @@
 #include <numeric>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json_document;
-using nlohmann::json_view;
+using json_document = nlohmann::json_document;
+using json_view = nlohmann::json_view;

 int main()
 {
@@ -2,8 +2,8 @@
 #include <iostream>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json_document;
-using nlohmann::json_view;
+using json_document = nlohmann::json_document;
+using json_view = nlohmann::json_view;

 int main()
 {
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json_document;
+using json_document = nlohmann::json_document;

 int main()
 {
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <nlohmann/json_view.hpp>

-using nlohmann::json_document;
+using json_document = nlohmann::json_document;
 using json_pointer = nlohmann::json::json_pointer;

 int main()
				`@@ -1 +0,0 @@`
				`<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><g font-family='Menlo,monospace' font-size='26' font-weight='600' fill='#ffffff' fill-opacity='0.10'><text x='14' y='34'>{</text><text x='92' y='22'>]</text><text x='136' y='60'>:</text><text x='52' y='82'>[</text><text x='118' y='112'>,</text><text x='20' y='140'>}</text><text x='78' y='150'>:</text><text x='140' y='158'>{</text></g></svg>`