Keep the created pointer rather than an uninitialized json_value

clang-tidy reported the json_value unions declared in the string, array, and object constructors of to_json.hpp as uninitialized (cppcoreguidelines-pro-type-member-init). Assign the created pointer to the member directly once the old value is destroyed. Signed-off-by: Niels Lohmann <mail@nlohmann.me>
Skip the failed-allocation test when exceptions are disabled
2026-09-26 18:00:30 +00:00 · 2026-09-26 10:07:22 +02:00 · 2026-09-26 07:41:42 +02:00 · 2026-09-25 22:19:39 +02:00
60 changed files with 290 additions and 4022 deletions
@@ -37,13 +37,13 @@ labels:
  files:
    - "include/nlohmann/detail/input/binary_reader\\.hpp"
    - "include/nlohmann/detail/output/binary_writer\\.hpp"
-    - "tests/src/unit-(bson|cbor|msgpack|ubjson|bjdata|bon8|binary_formats)"
+    - "tests/src/unit-(bson|cbor|msgpack|ubjson|bjdata|binary_formats)"
-    - "tests/src/fuzzer-parse_(bson|cbor|msgpack|ubjson|bjdata|bon8)"
+    - "tests/src/fuzzer-parse_(bson|cbor|msgpack|ubjson|bjdata)"
    - "docs/mkdocs/docs/features/binary_formats/"
-    - "docs/mkdocs/docs/(api/basic_json|examples)/(to|from)_(bson|cbor|msgpack|ubjson|bjdata|bon8)"
+    - "docs/mkdocs/docs/(api/basic_json|examples)/(to|from)_(bson|cbor|msgpack|ubjson|bjdata)"
 - label: "aspect: binary formats"
-  title: "(?i)(bson|cbor|msgpack|messagepack|ubjson|bjdata|bon8|binary format)"
+  title: "(?i)(bson|cbor|msgpack|messagepack|ubjson|bjdata|binary format)"
 - label: "python"
  files:
@@ -36,7 +36,6 @@ all:
 	@echo "clean - remove built files"
 	@echo "doctest - compile example files and check their output"
 	@echo "fuzz_testing - prepare fuzz testing of the JSON parser"
 	@echo "fuzz_testing_bon8 - prepare fuzz testing of the BON8 parser"
 	@echo "fuzz_testing_bson - prepare fuzz testing of the BSON parser"
 	@echo "fuzz_testing_cbor - prepare fuzz testing of the CBOR parser"
 	@echo "fuzz_testing_msgpack - prepare fuzz testing of the MessagePack parser"
@@ -72,14 +71,6 @@ fuzz_testing:
 	find tests/data/json_tests -size -5k -name *json | xargs -I{} cp "{}" fuzz-testing/testcases
 	@echo "Execute: afl-fuzz -i fuzz-testing/testcases -o fuzz-testing/out fuzz-testing/fuzzer"
 fuzz_testing_bon8:
 	rm -fr fuzz-testing
 	mkdir -p fuzz-testing fuzz-testing/testcases fuzz-testing/out
 	$(MAKE) parse_bon8_fuzzer -C tests CXX=afl-clang++
 	mv tests/parse_bon8_fuzzer fuzz-testing/fuzzer
 	find tests/data -size -5k -name *.bon8 | xargs -I{} cp "{}" fuzz-testing/testcases
 	@echo "Execute: afl-fuzz -i fuzz-testing/testcases -o fuzz-testing/out fuzz-testing/fuzzer"
 fuzz_testing_bson:
 	rm -fr fuzz-testing
 	mkdir -p fuzz-testing fuzz-testing/testcases fuzz-testing/out
@@ -40,7 +40,7 @@
  - [Implicit conversions](#implicit-conversions)
  - [Conversions to/from arbitrary types](#arbitrary-types-conversions)
  - [Specializing enum conversion](#specializing-enum-conversion)
-  - [Binary formats (BSON, CBOR, MessagePack, UBJSON, BJData, and BON8)](#binary-formats-bson-cbor-messagepack-ubjson-bjdata-and-bon8)
+  - [Binary formats (BSON, CBOR, MessagePack, UBJSON, and BJData)](#binary-formats-bson-cbor-messagepack-ubjson-and-bjdata)
 - [Customers](#customers)
 - [Ecosystem](#ecosystem)
 - [Supported compilers](#supported-compilers)
@@ -128,7 +128,7 @@ There is also a [**docset**](https://github.com/Kapeli/Dash-User-Contributions/t
 - **JSON Pointer functions**: [flatten](https://json.nlohmann.me/api/basic_json/flatten), [unflatten](https://json.nlohmann.me/api/basic_json/unflatten)
 - **JSON Patch functions**: [patch](https://json.nlohmann.me/api/basic_json/patch), [patch_inplace](https://json.nlohmann.me/api/basic_json/patch_inplace), [diff](https://json.nlohmann.me/api/basic_json/diff), [merge_patch](https://json.nlohmann.me/api/basic_json/merge_patch)
 - **Static functions**: [meta](https://json.nlohmann.me/api/basic_json/meta), [get_allocator](https://json.nlohmann.me/api/basic_json/get_allocator)
- **Binary formats**: [from_bjdata](https://json.nlohmann.me/api/basic_json/from_bjdata), [from_bon8](https://json.nlohmann.me/api/basic_json/from_bon8), [from_bson](https://json.nlohmann.me/api/basic_json/from_bson), [from_cbor](https://json.nlohmann.me/api/basic_json/from_cbor), [from_msgpack](https://json.nlohmann.me/api/basic_json/from_msgpack), [from_ubjson](https://json.nlohmann.me/api/basic_json/from_ubjson), [to_bjdata](https://json.nlohmann.me/api/basic_json/to_bjdata), [to_bon8](https://json.nlohmann.me/api/basic_json/to_bon8), [to_bson](https://json.nlohmann.me/api/basic_json/to_bson), [to_cbor](https://json.nlohmann.me/api/basic_json/to_cbor), [to_msgpack](https://json.nlohmann.me/api/basic_json/to_msgpack), [to_ubjson](https://json.nlohmann.me/api/basic_json/to_ubjson)
+- **Binary formats**: [from_bjdata](https://json.nlohmann.me/api/basic_json/from_bjdata), [from_bson](https://json.nlohmann.me/api/basic_json/from_bson), [from_cbor](https://json.nlohmann.me/api/basic_json/from_cbor), [from_msgpack](https://json.nlohmann.me/api/basic_json/from_msgpack), [from_ubjson](https://json.nlohmann.me/api/basic_json/from_ubjson), [to_bjdata](https://json.nlohmann.me/api/basic_json/to_bjdata), [to_bson](https://json.nlohmann.me/api/basic_json/to_bson), [to_cbor](https://json.nlohmann.me/api/basic_json/to_cbor), [to_msgpack](https://json.nlohmann.me/api/basic_json/to_msgpack), [to_ubjson](https://json.nlohmann.me/api/basic_json/to_ubjson)
 - **Non-member functions**: [operator<<](https://json.nlohmann.me/api/operator_ltlt/), [operator>>](https://json.nlohmann.me/api/operator_gtgt/), [to_string](https://json.nlohmann.me/api/basic_json/to_string)
 - **Literals**: [operator""_json](https://json.nlohmann.me/api/operator_literal_json)
 - **Helper classes**: [std::hash&lt;basic_json&gt;](https://json.nlohmann.me/api/basic_json/std_hash), [std::swap&lt;basic_json&gt;](https://json.nlohmann.me/api/basic_json/std_swap)
@@ -1110,9 +1110,9 @@ Other Important points:
 - When using `get<ENUM_TYPE>()`, undefined JSON values will default to the first pair specified in your map. Select this default pair carefully. If you desire an exception in this circumstance use `NLOHMANN_JSON_SERIALIZE_ENUM_STRICT()` which behaves identically except for throwing an exception on unrecognized values.
 - If an enum or JSON value is specified more than once in your map, the first matching occurrence from the top of the map will be returned when converting to or from JSON.
-### Binary formats (BSON, CBOR, MessagePack, UBJSON, BJData, and BON8)
+### Binary formats (BSON, CBOR, MessagePack, UBJSON, and BJData)
-Though JSON is a ubiquitous data format, it is not a very compact format suitable for data exchange, for instance over a network. Hence, the library supports [BSON](https://bsonspec.org) (Binary JSON), [CBOR](https://cbor.io) (Concise Binary Object Representation), [MessagePack](https://msgpack.org), [UBJSON](https://ubjson.org) (Universal Binary JSON Specification), [BJData](https://neurojson.org/bjdata) (Binary JData), and [BON8](https://github.com/hikoworks/hikogui/blob/main/docs/BON8.md) (Binary Object Notation 8) to efficiently encode JSON values to byte vectors and to decode such vectors.
+Though JSON is a ubiquitous data format, it is not a very compact format suitable for data exchange, for instance over a network. Hence, the library supports [BSON](https://bsonspec.org) (Binary JSON), [CBOR](https://cbor.io) (Concise Binary Object Representation), [MessagePack](https://msgpack.org), [UBJSON](https://ubjson.org) (Universal Binary JSON Specification) and [BJData](https://neurojson.org/bjdata) (Binary JData) to efficiently encode JSON values to byte vectors and to decode such vectors.
 ```cpp
 // create a JSON value
@@ -1149,14 +1149,6 @@ std::vector<std::uint8_t> v_ubjson = json::to_ubjson(j);
 // roundtrip
 json j_from_ubjson = json::from_ubjson(v_ubjson);
 // serialize to BON8
 std::vector<std::uint8_t> v_bon8 = json::to_bon8(j);
 // 0x88, 0x63, 0x6F, 0x6D, 0x70, 0x61, 0x63, 0x74, 0xF9, 0x73, 0x63, 0x68, 0x65, 0x6D, 0x61, 0x90
 // roundtrip
 json j_from_bon8 = json::from_bon8(v_bon8);
 ```
 The library also supports binary types from BSON, CBOR (byte strings), and MessagePack (bin, ext, fixext). They are stored by default as `std::vector<std::uint8_t>` to be processed outside the library.
@@ -542,7 +542,7 @@ add_custom_target(ci_infer
 add_custom_target(ci_offline_testdata
    COMMAND mkdir -p ${PROJECT_BINARY_DIR}/build_offline_testdata/test_data
-    COMMAND cd ${PROJECT_BINARY_DIR}/build_offline_testdata/test_data && ${GIT_TOOL} clone -c advice.detachedHead=false --branch v3.2.0 https://github.com/nlohmann/json_test_data.git --quiet --depth 1
+    COMMAND cd ${PROJECT_BINARY_DIR}/build_offline_testdata/test_data && ${GIT_TOOL} clone -c advice.detachedHead=false --branch v3.1.0 https://github.com/nlohmann/json_test_data.git --quiet --depth 1
    COMMAND ${CMAKE_COMMAND}
        -DCMAKE_BUILD_TYPE=Debug -GNinja
        -DJSON_BuildTests=ON -DJSON_FastTests=ON -DJSON_TestDataDirectory=${PROJECT_BINARY_DIR}/build_offline_testdata/test_data/json_test_data
@@ -1,5 +1,5 @@
 set(JSON_TEST_DATA_URL     https://github.com/nlohmann/json_test_data)
-set(JSON_TEST_DATA_VERSION 3.2.0)
+set(JSON_TEST_DATA_VERSION 3.1.0)
 include(ExternalProject)
@@ -48,7 +48,6 @@ INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::from_bjdata', 'Fu
 INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::from_bson', 'Function', 'api/basic_json/from_bson/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::from_cbor', 'Function', 'api/basic_json/from_cbor/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::from_msgpack', 'Function', 'api/basic_json/from_msgpack/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::from_bon8', 'Function', 'api/basic_json/from_bon8/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::from_ubjson', 'Function', 'api/basic_json/from_ubjson/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::front', 'Method', 'api/basic_json/front/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::get', 'Method', 'api/basic_json/get/index.html');
@@ -122,7 +121,6 @@ INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::to_bjdata', 'Func
 INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::to_bson', 'Function', 'api/basic_json/to_bson/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::to_cbor', 'Function', 'api/basic_json/to_cbor/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::to_msgpack', 'Function', 'api/basic_json/to_msgpack/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::to_bon8', 'Function', 'api/basic_json/to_bon8/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::to_string', 'Method', 'api/basic_json/to_string/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::to_ubjson', 'Function', 'api/basic_json/to_ubjson/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::value', 'Method', 'api/basic_json/value/index.html');
@@ -173,7 +171,6 @@ INSERT INTO searchIndex(name, type, path) VALUES ('Binary Formats: BJData', 'Gui
 INSERT INTO searchIndex(name, type, path) VALUES ('Binary Formats: BSON', 'Guide', 'features/binary_formats/bson/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('Binary Formats: CBOR', 'Guide', 'features/binary_formats/cbor/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('Binary Formats: MessagePack', 'Guide', 'features/binary_formats/messagepack/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('Binary Formats: BON8', 'Guide', 'features/binary_formats/bon8/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('Binary Formats: UBJSON', 'Guide', 'features/binary_formats/ubjson/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('Binary Values', 'Guide', 'features/binary_values/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('Comments', 'Guide', 'features/comments/index.html');
@@ -104,7 +104,6 @@ Linear in the size of the input.
 - [from_msgpack](from_msgpack.md) create a JSON value from an input in MessagePack format
 - [from_bson](from_bson.md) create a JSON value from an input in BSON format
 - [from_ubjson](from_ubjson.md) create a JSON value from an input in UBJSON format
 - [from_bon8](from_bon8.md) create a JSON value from an input in BON8 format
 ## Version history
@@ -1,108 +0,0 @@
 # <small>nlohmann::basic_json::</small>from_bon8
 ```cpp
 // (1)
 template<typename InputType>
 static basic_json from_bon8(InputType&& i,
                            const bool strict = true,
                            const bool allow_exceptions = true);
 // (2)
 template<typename IteratorType, typename SentinelType = IteratorType>
 static basic_json from_bon8(IteratorType first, SentinelType last,
                            const bool strict = true,
                            const bool allow_exceptions = true);
 ```
 Deserializes a given input to a JSON value using the BON8 (Binary Object Notation 8) serialization format.
 1. Reads from a compatible input.
 2. Reads from an iterator range, or an iterator and a sentinel of a different type (C++20 ranges support).
 The exact mapping and its limitations are described on a [dedicated page](../../features/binary_formats/bon8.md).
 ## Template parameters
 `InputType`
 :   A compatible input, for instance:
    - an `std::istream` object
    - a `FILE` pointer
    - a C-style array of characters
    - a pointer to a null-terminated string of single byte characters
    - a container `obj` for which `begin(obj)` and `end(obj)` produce a valid pair of iterators
      (as found via ADL or member functions, with semantics compatible to `std::begin` and `std::end`)
 `IteratorType`
 :   a compatible iterator type
 `SentinelType`
 :   defaults to `IteratorType`; may be a different type comparable to `IteratorType` via `operator!=`, for instance.
    - a custom sentinel type for C++20 ranges
    - `std::default_sentinel_t`, when `IteratorType` is `std::counted_iterator`
 ## Parameters
 `i` (in)
 :   an input in BON8 format convertible to an input adapter
 `first` (in)
 :   iterator to the start of the input
 `last` (in)
 :   iterator to the end of the input, or a sentinel value that compares equal to the end iterator with `operator!=`
 `strict` (in)
 :   whether to expect the input to be consumed until EOF (`#!cpp true` by default)
 `allow_exceptions` (in)
 :   whether to throw exceptions in case of a parse error (optional, `#!cpp true` by default)
 ## Return value
 deserialized JSON value; in case of a parse error and `allow_exceptions` set to `#!cpp false`, the return value will be
 `value_t::discarded`. The latter can be checked with [`is_discarded`](is_discarded.md).
 ## Exception safety
 Strong guarantee: if an exception is thrown, there are no changes in the JSON value.
 ## Exceptions
 - Throws [parse_error.110](../../home/exceptions.md#jsonexceptionparse_error110) if the given input ends prematurely or
  the end of the file was not reached when `strict` was set to true
 - Throws [parse_error.112](../../home/exceptions.md#jsonexceptionparse_error112) if a parse error occurs, for instance
  an invalid byte, a string that is not valid UTF-8, or an object key that is not a string
 ## Complexity
 Linear in the size of the input.
 ## Examples
 ??? example
    The example shows the deserialization of a byte vector in BON8 format to a JSON value.
    ```cpp
    --8<-- "examples/from_bon8.cpp"
    ```
    Output:
    ```json
    --8<-- "examples/from_bon8.output"
    ```
 ## See also
 - [to_bon8](to_bon8.md) create a BON8 serialization of a JSON value
 - [from_cbor](from_cbor.md) create a JSON value from an input in CBOR format
 - [from_msgpack](from_msgpack.md) create a JSON value from an input in MessagePack format
 - [from_bson](from_bson.md) create a JSON value from an input in BSON format
 - [from_ubjson](from_ubjson.md) create a JSON value from an input in UBJSON format
 - [from_bjdata](from_bjdata.md) create a JSON value from an input in BJData format
 ## Version history
 - Added in version 3.13.0.
@@ -104,7 +104,6 @@ Linear in the size of the input.
 - [from_msgpack](from_msgpack.md) for the related MessagePack format
 - [from_ubjson](from_ubjson.md) for the related UBJSON format
 - [from_bjdata](from_bjdata.md) for the related BJData format
 - [from_bon8](from_bon8.md) for the related BON8 format
 ## Version history
@@ -110,7 +110,6 @@ Linear in the size of the input.
 - [from_bson](from_bson.md) create a JSON value from an input in BSON format
 - [from_ubjson](from_ubjson.md) create a JSON value from an input in UBJSON format
 - [from_bjdata](from_bjdata.md) create a JSON value from an input in BJData format
 - [from_bon8](from_bon8.md) create a JSON value from an input in BON8 format
 ## Version history
@@ -103,7 +103,6 @@ Linear in the size of the input.
 - [from_bson](from_bson.md) create a JSON value from an input in BSON format
 - [from_ubjson](from_ubjson.md) create a JSON value from an input in UBJSON format
 - [from_bjdata](from_bjdata.md) create a JSON value from an input in BJData format
 - [from_bon8](from_bon8.md) create a JSON value from an input in BON8 format
 ## Version history
@@ -104,7 +104,6 @@ Linear in the size of the input.
 - [from_msgpack](from_msgpack.md) create a JSON value from an input in MessagePack format
 - [from_bson](from_bson.md) create a JSON value from an input in BSON format
 - [from_bjdata](from_bjdata.md) create a JSON value from an input in BJData format
 - [from_bon8](from_bon8.md) create a JSON value from an input in BON8 format
 ## Version history
@@ -290,13 +290,11 @@ Access to the JSON value
 ### Binary formats
 - [**from_bjdata**](from_bjdata.md) (_static_) - create a JSON value from an input in BJData format
 - [**from_bon8**](from_bon8.md) (_static_) - create a JSON value from an input in BON8 format
 - [**from_bson**](from_bson.md) (_static_) - create a JSON value from an input in BSON format
 - [**from_cbor**](from_cbor.md) (_static_) - create a JSON value from an input in CBOR format
 - [**from_msgpack**](from_msgpack.md) (_static_) - create a JSON value from an input in MessagePack format
 - [**from_ubjson**](from_ubjson.md) (_static_) - create a JSON value from an input in UBJSON format
 - [**to_bjdata**](to_bjdata.md) (_static_) - create a BJData serialization of a given JSON value
 - [**to_bon8**](to_bon8.md) (_static_) - create a BON8 serialization of a given JSON value
 - [**to_bson**](to_bson.md) (_static_) - create a BSON serialization of a given JSON value
 - [**to_cbor**](to_cbor.md) (_static_) - create a CBOR serialization of a given JSON value
 - [**to_msgpack**](to_msgpack.md) (_static_) - create a MessagePack serialization of a given JSON value
@@ -7,8 +7,7 @@ enum class input_format_t {
    msgpack,
    ubjson,
    bson,
-    bjdata,
+    bjdata
    bon8
 };
 ```
@@ -32,9 +31,6 @@ bson
 bjdata
 :   BJData (Binary JData)
 bon8
 :   BON8 (Binary Object Notation 8)
 ## Examples
 ??? example
@@ -5,7 +5,7 @@ class parse_error : public exception;
 ```
 The library throws this exception when a parse error occurs. Parse errors can occur during the deserialization of
-JSON text, BJData, BON8, BSON, CBOR, MessagePack, UBJSON, as well as when using JSON Patch.
+JSON text, BSON, CBOR, MessagePack, UBJSON, as well as when using JSON Patch.
 Member `byte` holds the byte index of the last read character in the input file (see note below).
@@ -65,8 +65,7 @@ The SAX event lister must follow the interface of [`json_sax`](../json_sax/index
 :   SAX event listener (must not be null)
 `format` (in)
-:    the format to parse (JSON, BJData, BON8, BSON, CBOR, MessagePack, or UBJSON) (optional, `input_format_t::json` by
+:    the format to parse (JSON, CBOR, MessagePack, or UBJSON) (optional, `input_format_t::json` by default), see
     default), see
     [`input_format_t`](input_format_t.md) for more information
 `strict` (in)
@@ -84,7 +84,6 @@ Linear in the size of the JSON value `j`.
 - [to_msgpack](to_msgpack.md) create a MessagePack serialization of a JSON value
 - [to_bson](to_bson.md) create a BSON serialization of a JSON value
 - [to_ubjson](to_ubjson.md) create a UBJSON serialization of a JSON value
 - [to_bon8](to_bon8.md) create a BON8 serialization of a JSON value
 ## Version history
@@ -1,76 +0,0 @@
 # <small>nlohmann::basic_json::</small>to_bon8
 ```cpp
 // (1)
 static std::vector<std::uint8_t> to_bon8(const basic_json& j);
 // (2)
 static void to_bon8(const basic_json& j, detail::output_adapter<std::uint8_t> o);
 static void to_bon8(const basic_json& j, detail::output_adapter<char> o);
 ```
 Serializes a given JSON value `j` to a byte vector using the BON8 (Binary Object Notation 8) serialization format. BON8
 is a compact binary serialization format that stores strings as UTF-8 without a length prefix.
 1. Returns a byte vector containing the BON8 serialization.
 2. Writes the BON8 serialization to an output adapter.
 The exact mapping and its limitations are described on a [dedicated page](../../features/binary_formats/bon8.md).
 ## Parameters
 `j` (in)
 :   JSON value to serialize
 `o` (in)
 :   output adapter to write serialization to
 ## Return value
 1. BON8 serialization as a byte vector
 2. (none)
 ## Exception safety
 Strong guarantee: if an exception is thrown, there are no changes in the JSON value `j`, which is never modified.
 With (2), the bytes written before the exception remain in the output adapter.
 ## Exceptions
 - Throws [out_of_range.407](../../home/exceptions.md#jsonexceptionout_of_range407) if `j` contains an unsigned integer
  above 9223372036854775807, which BON8 cannot represent
 - Throws [type_error.316](../../home/exceptions.md#jsonexceptiontype_error316) if `j` contains a string that is not
  valid UTF-8
 ## Complexity
 Linear in the size of the JSON value `j`.
 ## Examples
 ??? example
    The example shows the serialization of a JSON value to a byte vector in BON8 format.
    ```cpp
    --8<-- "examples/to_bon8.cpp"
    ```
    Output:
    ```json
    --8<-- "examples/to_bon8.output"
    ```
 ## See also
 - [from_bon8](from_bon8.md) create a JSON value from an input in BON8 format
 - [to_cbor](to_cbor.md) create a CBOR serialization of a JSON value
 - [to_msgpack](to_msgpack.md) create a MessagePack serialization of a JSON value
 - [to_bson](to_bson.md) create a BSON serialization of a JSON value
 - [to_ubjson](to_ubjson.md) create a UBJSON serialization of a JSON value
 - [to_bjdata](to_bjdata.md) create a BJData serialization of a JSON value
 ## Version history
 - Added in version 3.13.0.
@@ -72,7 +72,6 @@ pass before anything is written.
 - [to_msgpack](to_msgpack.md) create a MessagePack serialization of a JSON value
 - [to_ubjson](to_ubjson.md) create a UBJSON serialization of a JSON value
 - [to_bjdata](to_bjdata.md) create a BJData serialization of a JSON value
 - [to_bon8](to_bon8.md) create a BON8 serialization of a JSON value
 ## Version history
@@ -62,7 +62,6 @@ Linear in the size of the JSON value `j`.
 - [to_bson](to_bson.md) create a BSON serialization of a JSON value
 - [to_ubjson](to_ubjson.md) create a UBJSON serialization of a JSON value
 - [to_bjdata](to_bjdata.md) create a BJData serialization of a JSON value
 - [to_bon8](to_bon8.md) create a BON8 serialization of a JSON value
 ## Version history
@@ -61,7 +61,6 @@ Linear in the size of the JSON value `j`.
 - [to_bson](to_bson.md) create a BSON serialization of a JSON value
 - [to_ubjson](to_ubjson.md) create a UBJSON serialization of a JSON value
 - [to_bjdata](to_bjdata.md) create a BJData serialization of a JSON value
 - [to_bon8](to_bon8.md) create a BON8 serialization of a JSON value
 ## Version history
@@ -77,7 +77,6 @@ Linear in the size of the JSON value `j`.
 - [to_msgpack](to_msgpack.md) create a MessagePack serialization of a JSON value
 - [to_bson](to_bson.md) create a BSON serialization of a JSON value
 - [to_bjdata](to_bjdata.md) create a BJData serialization of a JSON value
 - [to_bon8](to_bon8.md) create a BON8 serialization of a JSON value
 ## Version history
@@ -11,9 +11,9 @@ The macro only affects the JSON text parser ([`parse`](../basic_json/parse.md),
 [`sax_parse`](../basic_json/sax_parse.md), and [`operator>>`](../operator_gtgt.md)). There are three cases where a NUL
 byte is still not rejected:
- The binary formats ([`from_bjdata`](../basic_json/from_bjdata.md), [`from_bon8`](../basic_json/from_bon8.md),
+- The binary formats ([`from_bjdata`](../basic_json/from_bjdata.md), [`from_bson`](../basic_json/from_bson.md),
-  [`from_bson`](../basic_json/from_bson.md), [`from_cbor`](../basic_json/from_cbor.md),
+  [`from_cbor`](../basic_json/from_cbor.md), [`from_msgpack`](../basic_json/from_msgpack.md),
-  [`from_msgpack`](../basic_json/from_msgpack.md), [`from_ubjson`](../basic_json/from_ubjson.md)) are never affected: there, `0x00` is ordinary data.
+  [`from_ubjson`](../basic_json/from_ubjson.md)) are never affected: there, `0x00` is ordinary data.
 - A bare `const char*` pointer has no length of its own, so its length is still determined with `strlen()`. The first
  NUL byte therefore still marks the end of the input, and nothing after it is read.
 - One trailing `'\0'` at the end of a `char` array (e.g., a string literal) is trimmed; see the warning below.
@@ -1,21 +0,0 @@
 #include <iostream>
 #include <iomanip>
 #include <nlohmann/json.hpp>
 using json = nlohmann::json;
 int main()
 {
    // create byte vector
    std::vector<std::uint8_t> v = {0x89, 0x63, 0x6f, 0x6d, 0x70, 0x61, 0x63, 0x74,
                                   0xf9, 0x66, 0x6f, 0x72, 0x6d, 0x61, 0x74, 0xff,
                                   0x42, 0x4f, 0x4e, 0x38, 0xff, 0x73, 0x63, 0x68,
                                   0x65, 0x6d, 0x61, 0x90
                                  };
    // deserialize it with BON8
    json j = json::from_bon8(v);
    // print the deserialized JSON value
    std::cout << std::setw(2) << j << std::endl;
 }
@@ -1,5 +0,0 @@
 {
  "compact": true,
  "format": "BON8",
  "schema": 0
 }
@@ -1,22 +0,0 @@
 #include <iostream>
 #include <iomanip>
 #include <nlohmann/json.hpp>
 using json = nlohmann::json;
 using namespace nlohmann::literals;
 int main()
 {
    // create a JSON value
    json j = R"({"compact": true, "format": "BON8", "schema": 0})"_json;
    // serialize it to BON8
    std::vector<std::uint8_t> v = json::to_bon8(j);
    // print the vector content
    for (auto& byte : v)
    {
        std::cout << "0x" << std::hex << std::setw(2) << std::setfill('0') << (int)byte << " ";
    }
    std::cout << std::endl;
 }
@@ -1 +0,0 @@
 0x89 0x63 0x6f 0x6d 0x70 0x61 0x63 0x74 0xf9 0x66 0x6f 0x72 0x6d 0x61 0x74 0xff 0x42 0x4f 0x4e 0x38 0xff 0x73 0x63 0x68 0x65 0x6d 0x61 0x90 
@@ -1,159 +0,0 @@
 # BON8
 BON8 (Binary Object Notation 8) is a compact binary serialization format for JSON values. It uses the byte values that
 cannot begin a UTF-8 character as type markers, so strings are stored as plain UTF-8 without a length prefix: a string
 ends at the first byte that cannot continue it. Integers from -10 to 39, `true`, `false`, `null`, and the floating-point
 values -1.0, 0.0, and 1.0 take a single byte, and arrays and objects with up to four elements need no terminator.
 !!! abstract "References"
    - [BON8 specification](https://github.com/hikoworks/hikogui/blob/main/docs/BON8.md)
    - [Reference implementation](https://github.com/hikoworks/hikogui/blob/main/src/hikogui/codec/BON8.hpp) in HikoGUI
 ## Serialization
 The library uses the following mapping from JSON values types to BON8 types according to the BON8 specification:
 | JSON value type | value/range                                  | BON8 type                     | first byte |
 |-----------------|----------------------------------------------|-------------------------------|------------|
 | null            | `null`                                       | null                          | 0xFA       |
 | boolean         | `true`                                       | true                          | 0xF9       |
 | boolean         | `false`                                      | false                         | 0xF8       |
 | number_integer  | -9223372036854775808..-2147483649            | int64                         | 0x8D       |
 | number_integer  | -2147483648..-33818507                       | int32                         | 0x8C       |
 | number_integer  | -33818506..-264075                           | 4-byte negative integer       | 0xF0..0xF7 |
 | number_integer  | -264074..-1931                               | 3-byte negative integer       | 0xE0..0xEF |
 | number_integer  | -1930..-11                                   | 2-byte negative integer       | 0xC2..0xDF |
 | number_integer  | -10..-1                                      | 1-byte negative integer       | 0xB8..0xC1 |
 | number_integer  | 0..39                                        | 1-byte positive integer       | 0x90..0xB7 |
 | number_integer  | 40..3879                                     | 2-byte positive integer       | 0xC2..0xDF |
 | number_integer  | 3880..528167                                 | 3-byte positive integer       | 0xE0..0xEF |
 | number_integer  | 528168..67637031                             | 4-byte positive integer       | 0xF0..0xF7 |
 | number_integer  | 67637032..2147483647                         | int32                         | 0x8C       |
 | number_integer  | 2147483648..9223372036854775807              | int64                         | 0x8D       |
 | number_unsigned | 0..39                                        | 1-byte positive integer       | 0x90..0xB7 |
 | number_unsigned | 40..3879                                     | 2-byte positive integer       | 0xC2..0xDF |
 | number_unsigned | 3880..528167                                 | 3-byte positive integer       | 0xE0..0xEF |
 | number_unsigned | 528168..67637031                             | 4-byte positive integer       | 0xF0..0xF7 |
 | number_unsigned | 67637032..2147483647                         | int32                         | 0x8C       |
 | number_unsigned | 2147483648..9223372036854775807              | int64                         | 0x8D       |
 | number_float    | `-1.0`                                       | -1.0                          | 0xFB       |
 | number_float    | `0.0`                                        | 0.0                           | 0xFC       |
 | number_float    | `1.0`                                        | 1.0                           | 0xFD       |
 | number_float    | *any other value representable by a float*   | binary32                      | 0x8E       |
 | number_float    | *any value NOT representable by a float*     | binary64                      | 0x8F       |
 | string          | *empty*                                      | end of string                 | 0xFF       |
 | string          | *non-empty*                                  | UTF-8 string                  | 0x00..0x7F, 0xC2..0xF4 |
 | array           | *size*: 0..4                                 | array with count              | 0x80..0x84 |
 | array           | *size*: 5 or more                            | array (terminated by 0xFE)    | 0x85       |
 | object          | *size*: 0..4                                 | object with count             | 0x86..0x8A |
 | object          | *size*: 5 or more                            | object (terminated by 0xFE)   | 0x8B       |
 | binary          | *size*: 0..4                                 | array with count              | 0x80..0x84 |
 | binary          | *size*: 5 or more                            | array (terminated by 0xFE)    | 0x85       |
 An integer that takes 2 to 4 bytes starts with a UTF-8 lead byte (0xC2..0xF7) that is followed by a byte that cannot
 continue a UTF-8 character: 0x00..0x7F for positive and 0xC0..0xFF for negative integers. A string is terminated by
 0xFF only if it is empty, if another string follows it, or if it is the last value of the message; otherwise, the first
 byte of the next value ends it.
 !!! success "Complete mapping"
    Except for the values listed below, any JSON value can be converted to a BON8 value.
    Any BON8 output created by `to_bon8` can be successfully parsed by `from_bon8`.
 !!! warning "Unsupported values"
    The following values can **not** be converted to a BON8 value:
      - unsigned integers above 9223372036854775807, because BON8 has no unsigned 64-bit integer type
        ([out_of_range.407](../../home/exceptions.md#jsonexceptionout_of_range407))
      - strings that are not valid UTF-8, because the end of a string is determined from its encoding
        ([type_error.316](../../home/exceptions.md#jsonexceptiontype_error316))
 !!! info "NaN/infinity handling"
    `-0.0`, `Infinity`, and `-Infinity` are serialized as binary32 (type 0x8E, 5 bytes total). `NaN` is serialized as
    the binary32 value 0x7F800001 that the specification recommends. This is in contrast to the
    [dump](../../api/basic_json/dump.md) function which serializes NaN or Infinity to `null`.
 !!! warning "Binary values"
    BON8 has no binary type. Binary values are serialized as arrays of integers (0..255), so they are read back as
    arrays. The subtype is not serialized.
 !!! info "Canonical representation"
    The output follows the specification's canonical representation rules: every value uses the shortest encoding,
    floating-point numbers use binary32 whenever that loses no precision, and object keys are sorted by their UTF-8
    code units. There are two exceptions:
    - Strings are not normalized to Unicode Normalization Form C (NFC).
    - Object keys are written in the order of the object type, which is sorted for `json`, but not for
      [`ordered_json`](../../api/ordered_json.md).
 ??? example
    ```cpp
    --8<-- "examples/to_bon8.cpp"
    ```
    Output:
    ```c
    --8<-- "examples/to_bon8.output"
    ```
 ## Deserialization
 The library maps BON8 types to JSON value types as follows:
 | BON8 type                     | JSON value type | first byte             |
 |-------------------------------|-----------------|------------------------|
 | UTF-8 string                  | string          | 0x00..0x7F             |
 | array with count              | array           | 0x80..0x84             |
 | array (terminated by 0xFE)    | array           | 0x85                   |
 | object with count             | object          | 0x86..0x8A             |
 | object (terminated by 0xFE)   | object          | 0x8B                   |
 | int32                         | number_unsigned or number_integer | 0x8C |
 | int64                         | number_unsigned or number_integer | 0x8D |
 | binary32                      | number_float    | 0x8E                   |
 | binary64                      | number_float    | 0x8F                   |
 | 1-byte positive integer       | number_unsigned | 0x90..0xB7             |
 | 1-byte negative integer       | number_integer  | 0xB8..0xC1             |
 | UTF-8 string                  | string          | 0xC2..0xF4, followed by 0x80..0xBF |
 | 2- to 4-byte positive integer | number_unsigned | 0xC2..0xF7, followed by 0x00..0x7F |
 | 2- to 4-byte negative integer | number_integer  | 0xC2..0xF7, followed by 0xC0..0xFF |
 | false                         | `false`         | 0xF8                   |
 | true                          | `true`          | 0xF9                   |
 | null                          | `null`          | 0xFA                   |
 | -1.0                          | number_float    | 0xFB                   |
 | 0.0                           | number_float    | 0xFC                   |
 | 1.0                           | number_float    | 0xFD                   |
 | empty string                  | string          | 0xFF                   |
 Non-negative integers are read as number_unsigned, negative integers as number_integer.
 !!! info
    Values that do not use the canonical representation, such as integers with a longer encoding than necessary,
    arrays and objects with up to four elements that are terminated by 0xFE, unsorted object keys, or a 0xFF after a
    string that would also end without it, are accepted. A second 0xFF is not a terminator but an empty string.
    Strings must be valid UTF-8, and the last string of a message must be terminated by 0xFF.
 !!! info
    Any BON8 output created by `to_bon8` can be successfully parsed by `from_bon8`.
 ??? example
    ```cpp
    --8<-- "examples/from_bon8.cpp"
    ```
    Output:
    ```json
    --8<-- "examples/from_bon8.output"
    ```
@@ -4,7 +4,6 @@ Though JSON is a ubiquitous data format, it is not a very compact format suitabl
 a network. Hence, the library supports
 - [BJData](bjdata.md) (Binary JData),
 - [BON8](bon8.md) (Binary Object Notation 8),
 - [BSON](bson.md) (Binary JSON),
 - [CBOR](cbor.md) (Concise Binary Object Representation),
 - [MessagePack](messagepack.md), and
@@ -19,7 +18,6 @@ to efficiently encode JSON values to byte vectors and to decode such vectors.
 | Format      | Serialization                                 | Deserialization                              |
 |-------------|-----------------------------------------------|----------------------------------------------|
 | BJData      | complete                                      | complete                                     |
 | BON8        | incomplete: no unsigned integers above int64  | complete                                     |
 | BSON        | incomplete: top-level value must be an object | incomplete, but all JSON types are supported |
 | CBOR        | complete                                      | incomplete, but all JSON types are supported |
 | MessagePack | complete                                      | complete                                     |
@@ -30,7 +28,6 @@ to efficiently encode JSON values to byte vectors and to decode such vectors.
 | Format      | Binary values | Binary subtypes |
 |-------------|---------------|-----------------|
 | BJData      | not supported | not supported   |
 | BON8        | not supported | not supported   |
 | BSON        | supported     | supported       |
 | CBOR        | supported     | supported       |
 | MessagePack | supported     | supported       |
@@ -45,7 +42,6 @@ See [binary values](../binary_values.md) for more information.
 | BJData             | 53.2 %      | 91.1 %       | 78.1 %            | 96.6 %        |
 | BJData (size)      | 58.6 %      | 92.1 %       | 86.7 %            | 97.4 %        |
 | BJData (size+type) | 58.6 %      | 92.1 %       | 86.5 %            | 97.4 %        |
 | BON8               | 50.5 %      | 83.8 %       | 63.5 %            | 87.5 %        |
 | BSON               | 85.8 %      | 95.2 %       | 95.8 %            | 106.7 %       |
 | CBOR               | 50.5 %      | 86.3 %       | 68.4 %            | 88.0 %        |
 | MessagePack        | 50.5 %      | 86.0 %       | 68.5 %            | 87.9 %        |
@@ -187,41 +187,6 @@ as an array of uint8 values. The library implements this translation.
    }
    ```
 ### BON8
 [BON8](binary_formats/bon8.md) neither supports binary values nor subtypes. The library serializes binary values as an
 array of integers.
 ??? example
    Code:
    ```cpp
    // create a binary value of subtype 42 (will be ignored in BON8)
    json j;
    j["binary"] = json::binary({0xCA, 0xFE, 0xBA, 0xBE}, 42);
    // convert to BON8
    auto v = json::to_bon8(j);
    ```
    `v` is a `std::vector<std::uint8_t>` with the following 16 elements:
    ```c
    0x87                                     // object with 1 member
        0x62 0x69 0x6E 0x61 0x72 0x79        // "binary"
        0x84                                 // array with 4 elements
            0xC3 0x22 0xC3 0x56 0xC3 0x12 0xC3 0x16  // content (each byte as a 2-byte integer)
    ```
    Note that the subtype is lost, and deserializing `v` would yield the following value:
    ```json
    {
      "binary": [202, 254, 186, 190]
    }
    ```
 ### BSON
 [BSON](binary_formats/bson.md) supports binary values and subtypes. If a subtype is given, it is used and added as an
@@ -35,8 +35,8 @@ C++ types, and finally serialize it again.
 - [Serialization](serialization.md) — turn a value back into JSON text with [`dump`](../api/basic_json/dump.md),
  including pretty-printing and handling of non-ASCII and invalid UTF-8.
 - [Binary formats](binary_formats/index.md) — encode values more compactly as
-  [BJData](binary_formats/bjdata.md), [BON8](binary_formats/bon8.md), [BSON](binary_formats/bson.md),
+  [BJData](binary_formats/bjdata.md), [BSON](binary_formats/bson.md), [CBOR](binary_formats/cbor.md),
-  [CBOR](binary_formats/cbor.md), [MessagePack](binary_formats/messagepack.md), or [UBJSON](binary_formats/ubjson.md).
+  [MessagePack](binary_formats/messagepack.md), or [UBJSON](binary_formats/ubjson.md).
 - [Binary values](binary_values.md) — store and exchange raw byte sequences.
 ## How values are stored and configured
@@ -117,7 +117,7 @@ For the [{fmt}](https://github.com/fmtlib/fmt) library, the library ships a
 ## Serializing to other formats
 Besides JSON text, a value can also be serialized to the more compact [binary formats](binary_formats/index.md)
-(BJData, BON8, BSON, CBOR, MessagePack, UBJSON).
+(BJData, BSON, CBOR, MessagePack, UBJSON).
 ## See also
@@ -547,7 +547,7 @@ Grisu2 algorithm, which produces the shortest representation that round-trips. O
 ### Required for the binary formats
 `NumberFloatType` must be `#!cpp float` or `#!cpp double`. The writers for
-[CBOR, MessagePack, UBJSON, BJData, BON8, and BSON](../binary_formats/index.md) map a floating-point value onto an IEEE 754
+[CBOR, MessagePack, UBJSON, BJData, and BSON](../binary_formats/index.md) map a floating-point value onto an IEEE 754
 binary32 or binary64 field and have no encoding for `#!cpp long double`.
 ### Compatible types
@@ -5,7 +5,6 @@
 *[ASCII]: American Standard Code for Information Interchange
 *[BDFL]: Benevolent Dictator for Life
 *[BJData]: Binary JData
 *[BON8]: Binary Object Notation 8
 *[BSON]: Binary JSON
 *[CBOR]: Concise Binary Object Representation
 *[CC0]: Creative Commons Zero
@@ -63,7 +63,6 @@ nav:
      - Binary Formats:
          - features/binary_formats/index.md
          - features/binary_formats/bjdata.md
          - features/binary_formats/bon8.md
          - features/binary_formats/bson.md
          - features/binary_formats/cbor.md
          - features/binary_formats/messagepack.md
@@ -143,7 +142,6 @@ nav:
          - 'flatten': api/basic_json/flatten.md
          - 'format_as': api/basic_json/format_as.md
          - 'from_bjdata': api/basic_json/from_bjdata.md
          - 'from_bon8': api/basic_json/from_bon8.md
          - 'from_bson': api/basic_json/from_bson.md
          - 'from_cbor': api/basic_json/from_cbor.md
          - 'from_msgpack': api/basic_json/from_msgpack.md
@@ -215,7 +213,6 @@ nav:
          - 'swap': api/basic_json/swap.md
          - 'std::swap&lt;basic_json&gt;': api/basic_json/std_swap.md
          - 'to_bjdata': api/basic_json/to_bjdata.md
          - 'to_bon8': api/basic_json/to_bon8.md
          - 'to_bson': api/basic_json/to_bson.md
          - 'to_cbor': api/basic_json/to_cbor.md
          - 'to_msgpack': api/basic_json/to_msgpack.md
@@ -415,7 +412,7 @@ plugins:
      markdown_description: >
        JSON for Modern C++ is a C++11 header-only library implementing a JSON
        value type with an STL-like API, JSON Pointer/Patch, CBOR/MessagePack/
-        BSON/UBJSON/BJData/BON8 binary format support, and a SAX-style parser interface.
+        BSON/UBJSON/BJData binary format support, and a SAX-style parser interface.
      sections:
        Home:
          - index.md
@@ -42,6 +42,10 @@ namespace detail
 * j.m_data.m_value.destroy(j.m_data.m_type) to avoid a memory leak in case j contains an
 * allocated value (e.g., a string). See bug issue
 * https://github.com/nlohmann/json/issues/2865 for more information.
 *
 * A value that has to be allocated is created before the old one is destroyed:
 * were it the other way around, an exception while creating the new value would
 * leave j with the type of the new value, but the pointer to the destroyed old one.
 */
 template<value_t> struct external_constructor;
@@ -65,18 +69,20 @@ struct external_constructor<value_t::string>
    template<typename BasicJsonType>
    static void construct(BasicJsonType& j, const typename BasicJsonType::string_t& s)
    {
        const typename BasicJsonType::json_value value(s);
        j.m_data.m_value.destroy(j.m_data.m_type);
        j.m_data.m_type = value_t::string;
-        j.m_data.m_value = s;
+        j.m_data.m_value = value;
        j.assert_invariant();
    }
    template<typename BasicJsonType>
    static void construct(BasicJsonType& j, typename BasicJsonType::string_t&& s)
    {
        const typename BasicJsonType::json_value value(std::move(s));
        j.m_data.m_value.destroy(j.m_data.m_type);
        j.m_data.m_type = value_t::string;
-        j.m_data.m_value = std::move(s);
+        j.m_data.m_value = value;
        j.assert_invariant();
    }
@@ -85,9 +91,10 @@ struct external_constructor<value_t::string>
                             int > = 0 >
    static void construct(BasicJsonType& j, const CompatibleStringType& str)
    {
        auto* created = j.template create<typename BasicJsonType::string_t>(str);
        j.m_data.m_value.destroy(j.m_data.m_type);
        j.m_data.m_type = value_t::string;
-        j.m_data.m_value.string = j.template create<typename BasicJsonType::string_t>(str);
+        j.m_data.m_value.string = created;
        j.assert_invariant();
    }
 };
@@ -98,18 +105,20 @@ struct external_constructor<value_t::binary>
    template<typename BasicJsonType>
    static void construct(BasicJsonType& j, const typename BasicJsonType::binary_t& b)
    {
        const typename BasicJsonType::json_value value(b);
        j.m_data.m_value.destroy(j.m_data.m_type);
        j.m_data.m_type = value_t::binary;
-        j.m_data.m_value = typename BasicJsonType::binary_t(b);
+        j.m_data.m_value = value;
        j.assert_invariant();
    }
    template<typename BasicJsonType>
    static void construct(BasicJsonType& j, typename BasicJsonType::binary_t&& b)
    {
        const typename BasicJsonType::json_value value(std::move(b));
        j.m_data.m_value.destroy(j.m_data.m_type);
        j.m_data.m_type = value_t::binary;
-        j.m_data.m_value = typename BasicJsonType::binary_t(std::move(b));
+        j.m_data.m_value = value;
        j.assert_invariant();
    }
 };
@@ -159,9 +168,10 @@ struct external_constructor<value_t::array>
    template<typename BasicJsonType>
    static void construct(BasicJsonType& j, const typename BasicJsonType::array_t& arr)
    {
        const typename BasicJsonType::json_value value(arr);
        j.m_data.m_value.destroy(j.m_data.m_type);
        j.m_data.m_type = value_t::array;
-        j.m_data.m_value = arr;
+        j.m_data.m_value = value;
        j.set_parents();
        j.assert_invariant();
    }
@@ -169,9 +179,10 @@ struct external_constructor<value_t::array>
    template<typename BasicJsonType>
    static void construct(BasicJsonType& j, typename BasicJsonType::array_t&& arr)
    {
        const typename BasicJsonType::json_value value(std::move(arr));
        j.m_data.m_value.destroy(j.m_data.m_type);
        j.m_data.m_type = value_t::array;
-        j.m_data.m_value = std::move(arr);
+        j.m_data.m_value = value;
        j.set_parents();
        j.assert_invariant();
    }
@@ -187,9 +198,10 @@ struct external_constructor<value_t::array>
        using std::begin;
        using std::end;
        auto* created = j.template create<typename BasicJsonType::array_t>(begin(arr), end(arr));
        j.m_data.m_value.destroy(j.m_data.m_type);
        j.m_data.m_type = value_t::array;
-        j.m_data.m_value.array = j.template create<typename BasicJsonType::array_t>(begin(arr), end(arr));
+        j.m_data.m_value.array = created;
        j.set_parents();
        j.assert_invariant();
    }
@@ -197,15 +209,17 @@ struct external_constructor<value_t::array>
    template<typename BasicJsonType>
    static void construct(BasicJsonType& j, const std::vector<bool>& arr)
    {
-        j.m_data.m_value.destroy(j.m_data.m_type);
+        typename BasicJsonType::array_t elements;
-        j.m_data.m_type = value_t::array;
+        elements.reserve(arr.size());
        j.m_data.m_value = value_t::array;
        j.m_data.m_value.array->reserve(arr.size());
        for (const bool x : arr)
        {
-            j.m_data.m_value.array->push_back(x);
+            elements.push_back(x);
            j.set_parent(j.m_data.m_value.array->back());
        }
        const typename BasicJsonType::json_value value(std::move(elements));
        j.m_data.m_value.destroy(j.m_data.m_type);
        j.m_data.m_type = value_t::array;
        j.m_data.m_value = value;
        j.set_parents();
        j.assert_invariant();
    }
@@ -213,11 +227,12 @@ struct external_constructor<value_t::array>
             enable_if_t<std::is_convertible<T, BasicJsonType>::value, int> = 0>
    static void construct(BasicJsonType& j, const std::valarray<T>& arr)
    {
        typename BasicJsonType::array_t elements(arr.size());
        std::copy(std::begin(arr), std::end(arr), elements.begin());
        const typename BasicJsonType::json_value value(std::move(elements));
        j.m_data.m_value.destroy(j.m_data.m_type);
        j.m_data.m_type = value_t::array;
-        j.m_data.m_value = value_t::array;
+        j.m_data.m_value = value;
        j.m_data.m_value.array->resize(arr.size());
        std::copy(std::begin(arr), std::end(arr), j.m_data.m_value.array->begin());
        j.set_parents();
        j.assert_invariant();
    }
@@ -229,14 +244,16 @@ struct external_constructor<value_t::array>
             enable_if_t<is_compatible_range_view<std::remove_cvref_t<CompatibleArrayType>>::value, int> = 0>
    static void construct(BasicJsonType& j, CompatibleArrayType && arr)
    {
-        j.m_data.m_value.destroy(j.m_data.m_type);
+        typename BasicJsonType::array_t elements;
        j.m_data.m_type = value_t::array;
        j.m_data.m_value = value_t::array;
        for (auto&& x : std::forward<CompatibleArrayType>(arr))
        {
-            j.m_data.m_value.array->push_back(x);
+            elements.push_back(x);
            j.set_parent(j.m_data.m_value.array->back());
        }
        const typename BasicJsonType::json_value value(std::move(elements));
        j.m_data.m_value.destroy(j.m_data.m_type);
        j.m_data.m_type = value_t::array;
        j.m_data.m_value = value;
        j.set_parents();
        j.assert_invariant();
    }
 #endif
@@ -248,9 +265,10 @@ struct external_constructor<value_t::object>
    template<typename BasicJsonType>
    static void construct(BasicJsonType& j, const typename BasicJsonType::object_t& obj)
    {
        const typename BasicJsonType::json_value value(obj);
        j.m_data.m_value.destroy(j.m_data.m_type);
        j.m_data.m_type = value_t::object;
-        j.m_data.m_value = obj;
+        j.m_data.m_value = value;
        j.set_parents();
        j.assert_invariant();
    }
@@ -258,9 +276,10 @@ struct external_constructor<value_t::object>
    template<typename BasicJsonType>
    static void construct(BasicJsonType& j, typename BasicJsonType::object_t&& obj)
    {
        const typename BasicJsonType::json_value value(std::move(obj));
        j.m_data.m_value.destroy(j.m_data.m_type);
        j.m_data.m_type = value_t::object;
-        j.m_data.m_value = std::move(obj);
+        j.m_data.m_value = value;
        j.set_parents();
        j.assert_invariant();
    }
@@ -272,9 +291,10 @@ struct external_constructor<value_t::object>
        using std::begin;
        using std::end;
        auto* created = j.template create<typename BasicJsonType::object_t>(begin(obj), end(obj));
        j.m_data.m_value.destroy(j.m_data.m_type);
        j.m_data.m_type = value_t::object;
-        j.m_data.m_value.object = j.template create<typename BasicJsonType::object_t>(begin(obj), end(obj));
+        j.m_data.m_value.object = created;
        j.set_parents();
        j.assert_invariant();
    }
@@ -28,7 +28,6 @@
 #include <nlohmann/detail/input/input_adapters.hpp>
 #include <nlohmann/detail/input/json_sax.hpp>
 #include <nlohmann/detail/input/lexer.hpp>
 #include <nlohmann/detail/input/string_scan.hpp>
 #include <nlohmann/detail/macro_scope.hpp>
 #include <nlohmann/detail/meta/is_sax.hpp>
 #include <nlohmann/detail/meta/type_traits.hpp>
@@ -85,7 +84,7 @@ JSON_INLINE_VARIABLE constexpr std::size_t max_valueless_container_size = 1 << 2
 ///////////////////
 /*!
-@brief deserialization of BJData, BON8, BSON, CBOR, MessagePack, and UBJSON values
+@brief deserialization of CBOR, MessagePack, and UBJSON values
 */
 template<typename BasicJsonType, typename InputAdapterType, typename SAX = json_sax_dom_parser<BasicJsonType, InputAdapterType>>
 class binary_reader
@@ -99,11 +98,6 @@ class binary_reader
    using char_type = typename InputAdapterType::char_type;
    using char_int_type = typename char_traits<char_type>::int_type;
    /// whether the input is a contiguous block of bytes that can be inspected
    /// and consumed in bulk (as in the lexer); used by @ref get_bon8_string_bulk
    static constexpr bool bulk_scan =
        input_adapter_supports_bulk_scan<InputAdapterType>(is_detected<detect_supports_bulk_scan, InputAdapterType> {});
  public:
    /*!
    @brief create a binary reader
@@ -138,7 +132,6 @@ class binary_reader
    {
        sax = sax_;
        container_stack.clear();
        bon8_pushback_size = 0;
        bool result = false;
        switch (format)
@@ -160,10 +153,6 @@ class binary_reader
                result = parse_ubjson_internal();
                break;
            case input_format_t::bon8:
                result = parse_bon8_internal();
                break;
            case input_format_t::json: // LCOV_EXCL_LINE
            default:            // LCOV_EXCL_LINE
                JSON_ASSERT(false); // NOLINT(cert-dcl03-c,hicpp-static-assert,misc-static-assert) LCOV_EXCL_LINE
@@ -176,11 +165,6 @@ class binary_reader
            {
                get_ignore_noop();
            }
            else if (input_format == input_format_t::bon8)
            {
                // a string that ends a container hands back the byte after it
                get_bon8();
            }
            else
            {
                get();
@@ -412,11 +396,6 @@ class binary_reader
    */
    bool get_bson_cstr(string_t& result)
    {
        if (get_bson_cstr_bulk(result, std::integral_constant<bool, bulk_scan> {}))
        {
            return true;
        }
        auto out = std::back_inserter(result);
        while (true)
        {
@@ -433,46 +412,6 @@ class binary_reader
        }
    }
    /*!
    @brief read a C-style string from contiguous input in one step
    @param[in,out] result  the string to append to
    @return whether the string was read; if the input has no \x00-byte, nothing
            is read, and @ref get_bson_cstr reports the end of the input
    */
    bool get_bson_cstr_bulk(string_t& result, std::true_type /*bulk*/)
    {
        const std::size_t remaining = ia.bulk_remaining();
        if (remaining == 0)
        {
            return false;
        }
        const auto* const data = reinterpret_cast<const unsigned char*>(ia.bulk_data());
        // a plain loop rather than std::memchr: most keys are short (array
        // indices are keys, too), and the call would cost more than it saves
        std::size_t length = 0;
        while (length < remaining && data[length] != 0x00)
        {
            ++length;
        }
        if (length == remaining)
        {
            return false;
        }
        result.append(reinterpret_cast<const typename string_t::value_type*>(data), length);
        // consume the string and its \x00-byte, as the byte-wise path does
        ia.bulk_skip(length + 1);
        chars_read += length + 1;
        current = 0x00;
        return true;
    }
    /// input that is not contiguous: C-style strings are read byte by byte
    bool get_bson_cstr_bulk(string_t& /*result*/, std::false_type /*bulk*/) const noexcept
    {
        return false;
    }
    /*!
    @brief Parses a zero-terminated string of length @a len from the BSON
           input.
@@ -3245,549 +3184,6 @@ class binary_reader
        }
    }
    //////////
    // BON8 //
    //////////
    /*!
    @brief get the next byte of a BON8 value
    A BON8 string has no length prefix and no mandatory terminator: it ends at
    the first byte that cannot continue it, which is already the first byte (or,
    for an integer that begins with a UTF-8 lead byte, the first two bytes) of
    whatever follows. The string reader hands those bytes back with
    @ref unget_bon8, and every BON8 read goes through this function so that
    they are seen again.
    @return character read from the input
    */
    char_int_type get_bon8()
    {
        if (bon8_pushback_size != 0)
        {
            ++chars_read;
            return current = bon8_pushback[--bon8_pushback_size];
        }
        return get();
    }
    /*!
    @brief hand a byte back so that the next @ref get_bon8 returns it again
    @param[in] c  the byte to hand back; bytes handed back are returned in
                  reverse order
    */
    void unget_bon8(const char_int_type c)
    {
        // At most two bytes are ever handed back: a byte is only handed back
        // right after it was read with get_bon8(), and the only place that
        // hands back two bytes (a lead byte and the byte after it) read both
        // of them in a row, which emptied the buffer first. This is an
        // invariant of the reader rather than a property of the input, so
        // an assertion suffices (the fuzzers are built with assertions).
        JSON_ASSERT(bon8_pushback_size < bon8_pushback.size());
        bon8_pushback[bon8_pushback_size++] = c;
        --chars_read;
    }
    /*!
    @param[in] c  a byte
    @return whether @a c is a UTF-8 continuation byte (0x80..0xBF)
    */
    static constexpr bool is_bon8_continuation(const char_int_type c) noexcept
    {
        return 0x80 <= c && c <= 0xBF;
    }
    /*!
    @brief report a parse error at the last read byte
    @param[in] detail   a detailed error message
    @param[in] context  further context information
    @return false
    */
    bool bon8_error(const std::string& detail, const char* context)
    {
        auto last_token = get_token_string();
        return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read,
                                exception_message(input_format_t::bon8, concat(detail, ": 0x", last_token), context), nullptr));
    }
    /*!
    @brief read a BON8 value and everything nested inside it
    Reads values until the one that was begun here is complete, resuming the
    enclosing container after each element, so that the nesting depth of the
    input costs heap rather than native stack (see #5104).
    @return whether reading the value succeeded
    */
    bool parse_bon8_internal()
    {
        // the key currently being read; hoisted out of the loop so that its
        // capacity is reused across elements and across nesting levels
        string_t key;
        while (true)
        {
            if (!container_stack.empty())
            {
                // a copy, not a reference: it must stay valid across the
                // pop_back() below, which destroys the container_stack element
                // it would otherwise alias
                const container_frame top = container_stack.back();
                bool at_end = false;
                if (top.remaining != npos)
                {
                    // counted container (0x80..0x84, 0x86..0x8A): it ends once
                    // its elements have been read
                    at_end = (top.remaining == 0);
                    if (!at_end)
                    {
                        // claim the element about to be read
                        --container_stack.back().remaining;
                    }
                }
                else
                {
                    // container 0x85 or 0x8B: it ends at an end-of-container
                    // marker (0xFE); any other byte begins the next element
                    at_end = (get_bon8() == 0xFE);
                    if (!at_end)
                    {
                        unget_bon8(current);
                    }
                }
                if (at_end)
                {
                    container_stack.pop_back();
                    if (JSON_HEDLEY_UNLIKELY(top.is_object ? !sax->end_object() : !sax->end_array()))
                    {
                        return false;
                    }
                    // the value begun here is complete once its container is
                    if (container_stack.empty())
                    {
                        return true;
                    }
                    continue;
                }
                if (top.is_object)
                {
                    key.clear();
                    if (JSON_HEDLEY_UNLIKELY(!get_bon8_key(key) || !sax->key(key)))
                    {
                        return false;
                    }
                }
            }
            if (JSON_HEDLEY_UNLIKELY(!parse_bon8_value()))
            {
                return false;
            }
            // a value that opened a container left it on the stack; one that
            // did not, and that was not inside a container, was the whole value
            if (container_stack.empty())
            {
                return true;
            }
        }
    }
    /*!
    @brief read one BON8 value
    Reads a single value and passes it to the SAX parser. A value that begins
    a container is not read to its end: the container is opened with
    @ref enter_container and its elements are read by
    @ref parse_bon8_internal, so that nesting does not consume native stack.
    @return whether reading the value succeeded
    */
    bool parse_bon8_value()
    {
        const auto byte = get_bon8();
        if (byte == char_traits<char_type>::eof())
        {
            return unexpect_eof(input_format_t::bon8, "value");
        }
        // string: ASCII character
        if (byte <= 0x7F)
        {
            string_t s;
            unget_bon8(byte);
            return get_bon8_string(s) && sax->string(s);
        }
        // array with 0..4 elements
        if (byte <= 0x84)
        {
            return enter_array(static_cast<std::size_t>(byte - 0x80));
        }
        // array terminated by 0xFE
        if (byte == 0x85)
        {
            return enter_array(npos);
        }
        // object with 0..4 members
        if (byte <= 0x8A)
        {
            return enter_object(static_cast<std::size_t>(byte - 0x86));
        }
        switch (byte)
        {
            case 0x8B: // object terminated by 0xFE
                return enter_object(npos);
            case 0x8C: // int32
            {
                std::int32_t number{};
                return get_number(input_format_t::bon8, number) && emit_bon8_integer(number);
            }
            case 0x8D: // int64
            {
                std::int64_t number{};
                return get_number(input_format_t::bon8, number) && emit_bon8_integer(number);
            }
            case 0x8E: // binary32
            {
                float number{};
                return get_number(input_format_t::bon8, number) && sax->number_float(static_cast<number_float_t>(number), "");
            }
            case 0x8F: // binary64
            {
                double number{};
                return get_number(input_format_t::bon8, number) && sax->number_float(static_cast<number_float_t>(number), "");
            }
            case 0xF8:
                return sax->boolean(false);
            case 0xF9:
                return sax->boolean(true);
            case 0xFA:
                return sax->null();
            case 0xFB:
                return sax->number_float(static_cast<number_float_t>(-1.0), "");
            case 0xFC:
                return sax->number_float(static_cast<number_float_t>(0.0), "");
            case 0xFD:
                return sax->number_float(static_cast<number_float_t>(1.0), "");
            case 0xFF: // empty string
            {
                string_t s;
                return sax->string(s);
            }
            default:
                break;
        }
        // integer 0..39
        if (byte <= 0xB7)
        {
            return sax->number_unsigned(static_cast<number_unsigned_t>(byte - 0x90));
        }
        // integer -1..-10
        if (byte <= 0xC1)
        {
            return sax->number_integer(-1 - static_cast<number_integer_t>(byte - 0xB8));
        }
        // 0xC2..0xF7: a UTF-8 lead byte begins a string if a continuation
        // byte follows and an integer otherwise
        if (byte <= 0xF7)
        {
            const auto second = get_bon8();
            if (is_bon8_continuation(second))
            {
                string_t s;
                unget_bon8(second);
                unget_bon8(byte);
                return get_bon8_string(s) && sax->string(s);
            }
            return get_bon8_integer(byte, second);
        }
        // 0xFE: end of container where a value is expected
        return bon8_error("invalid byte", "value");
    }
    /*!
    @brief pass an integer to the SAX parser
    Non-negative integers are passed as unsigned, negative integers as signed
    numbers, like the other binary formats do.
    @param[in] number  the integer
    @return whether the SAX parser accepted the value
    */
    bool emit_bon8_integer(const std::int64_t number)
    {
        if (number >= 0)
        {
            return sax->number_unsigned(static_cast<number_unsigned_t>(number));
        }
        return sax->number_integer(static_cast<number_integer_t>(number));
    }
    /*!
    @brief read an integer encoded in 2..4 bytes
    The first byte is a UTF-8 lead byte (0xC2..0xF7) that is followed by a
    byte that is not a continuation byte: 0x00..0x7F for positive and
    0xC0..0xFF for negative integers. The lead byte's low bits and the second
    byte's low 7 (positive) or 6 (negative) bits are the most significant bits
    of the value; 3- and 4-byte integers add one or two full bytes. Each range
    starts where the shorter one ends, so no value has two encodings of the
    same length.
    @param[in] lead    the first byte (0xC2..0xF7)
    @param[in] second  the second byte
    @return whether reading the integer succeeded
    */
    bool get_bon8_integer(const char_int_type lead, const char_int_type second)
    {
        if (JSON_HEDLEY_UNLIKELY(!unexpect_eof(input_format_t::bon8, "number")))
        {
            return false;
        }
        const bool negative = second >= 0xC0;
        auto value = static_cast<std::int64_t>(negative ? (second & 0x3F) : second);
        std::int64_t offset = 0;
        int extra_bytes = 0;
        if (lead <= 0xDF)
        {
            value |= static_cast<std::int64_t>(lead - 0xC2) << (negative ? 6 : 7);
            offset = negative ? 11 : 40;
        }
        else if (lead <= 0xEF)
        {
            value |= static_cast<std::int64_t>(lead & 0x0F) << (negative ? 6 : 7);
            offset = negative ? 1931 : 3880;
            extra_bytes = 1;
        }
        else
        {
            value |= static_cast<std::int64_t>(lead & 0x07) << (negative ? 6 : 7);
            offset = negative ? 264075 : 528168;
            extra_bytes = 2;
        }
        for (int i = 0; i < extra_bytes; ++i)
        {
            if (JSON_HEDLEY_UNLIKELY(get_bon8() == char_traits<char_type>::eof()))
            {
                return unexpect_eof(input_format_t::bon8, "number");
            }
            value = (value << 8) | static_cast<std::int64_t>(current);
        }
        return negative ? sax->number_integer(static_cast<number_integer_t>(-(value + offset)))
               : sax->number_unsigned(static_cast<number_unsigned_t>(value + offset));
    }
    /*!
    @brief read an object key
    A key must be a string, so its first byte must be an ASCII character, a
    UTF-8 lead byte followed by a continuation byte, or 0xFF (empty string).
    @param[out] result  the key
    @return whether reading the key succeeded
    */
    bool get_bon8_key(string_t& result)
    {
        const auto byte = get_bon8();
        if (byte == char_traits<char_type>::eof())
        {
            return unexpect_eof(input_format_t::bon8, "key");
        }
        if (byte == 0xFF)
        {
            return true;
        }
        if (byte <= 0x7F)
        {
            unget_bon8(byte);
            return get_bon8_string(result);
        }
        if (0xC2 <= byte && byte <= 0xF7)
        {
            const auto second = get_bon8();
            unget_bon8(second);
            if (is_bon8_continuation(second))
            {
                unget_bon8(byte);
                return get_bon8_string(result);
            }
            // an integer: report its first byte rather than the one after it
            current = byte;
        }
        return bon8_error("expected a string; last byte", "key");
    }
    /*!
    @brief append the run of valid UTF-8 at the read position to a string
    For contiguous input, the ASCII characters and complete well-formed UTF-8
    sequences at the read position are appended to @a result in one step. The
    byte that stops the run (an end-of-string marker, the first byte of the
    next value, or an ill-formed byte) is left for @ref get_bon8_string, so
    that strings end and errors are reported exactly as without this step.
    @param[in,out] result  the string to append to
    */
    void get_bon8_string_bulk(string_t& result, std::true_type /*bulk*/)
    {
        // bytes handed back must be read through get_bon8() first
        if (bon8_pushback_size != 0)
        {
            return;
        }
        const std::size_t remaining = ia.bulk_remaining();
        if (remaining == 0)
        {
            return;
        }
        const auto* const data = reinterpret_cast<const unsigned char*>(ia.bulk_data());
        const std::size_t length = valid_utf8_prefix(data, remaining);
        if (length != 0)
        {
            result.append(reinterpret_cast<const typename string_t::value_type*>(data), length);
            ia.bulk_skip(length);
            chars_read += length;
        }
    }
    /// input that is not contiguous: strings are read byte by byte
    void get_bon8_string_bulk(string_t& /*result*/, std::false_type /*bulk*/) const noexcept {}
    /*!
    @brief read a string
    Reads UTF-8 characters until an end-of-string marker (0xFF), which is
    consumed, or a byte that cannot continue the string, which is handed back
    to be read as the start of the next value. The string must be valid UTF-8,
    and it must not end at the end of the input: the last string of a message
    is always terminated by 0xFF.
    @param[out] result  the string
    @return whether reading the string succeeded
    */
    bool get_bon8_string(string_t& result)
    {
        while (true)
        {
            get_bon8_string_bulk(result, std::integral_constant<bool, bulk_scan> {});
            const auto byte = get_bon8();
            if (byte == char_traits<char_type>::eof())
            {
                return unexpect_eof(input_format_t::bon8, "string");
            }
            // end of string
            if (byte == 0xFF)
            {
                return true;
            }
            // ASCII character
            if (byte <= 0x7F)
            {
                result.push_back(static_cast<typename string_t::value_type>(byte));
                continue;
            }
            // a byte that cannot begin a character ends the string and begins
            // the next value
            if (byte < 0xC2 || byte > 0xF7)
            {
                unget_bon8(byte);
                return true;
            }
            // a lead byte ends the string if no continuation byte follows: it
            // is then the first byte of an integer
            const auto second = get_bon8();
            if (!is_bon8_continuation(second))
            {
                unget_bon8(second);
                unget_bon8(byte);
                return true;
            }
            // the valid range of the second byte excludes overlong forms,
            // surrogates, and code points above U+10FFFF
            // (RFC 3629, section 4)
            int continuation_bytes = 0;
            bool valid_second = true;
            if (byte <= 0xDF)
            {
                continuation_bytes = 1;
            }
            else if (byte <= 0xEF)
            {
                continuation_bytes = 2;
                valid_second = (byte != 0xE0 || second >= 0xA0) && (byte != 0xED || second <= 0x9F);
            }
            else
            {
                continuation_bytes = 3;
                valid_second = byte <= 0xF4 && (byte != 0xF0 || second >= 0x90) && (byte != 0xF4 || second <= 0x8F);
            }
            if (JSON_HEDLEY_UNLIKELY(!valid_second))
            {
                return bon8_error("invalid UTF-8 byte", "string");
            }
            result.push_back(static_cast<typename string_t::value_type>(byte));
            result.push_back(static_cast<typename string_t::value_type>(second));
            for (int i = 1; i < continuation_bytes; ++i)
            {
                if (JSON_HEDLEY_UNLIKELY(get_bon8() == char_traits<char_type>::eof()))
                {
                    return unexpect_eof(input_format_t::bon8, "string");
                }
                if (JSON_HEDLEY_UNLIKELY(!is_bon8_continuation(current)))
                {
                    return bon8_error("invalid UTF-8 byte", "string");
                }
                result.push_back(static_cast<typename string_t::value_type>(current));
            }
        }
    }
    ///////////////////////
    // Utility functions //
    ///////////////////////
@@ -4086,10 +3482,6 @@ class binary_reader
                error_msg += "BJData";
                break;
            case input_format_t::bon8:
                error_msg += "BON8";
                break;
            case input_format_t::json: // LCOV_EXCL_LINE
            default:            // LCOV_EXCL_LINE
                JSON_ASSERT(false); // NOLINT(cert-dcl03-c,hicpp-static-assert,misc-static-assert) LCOV_EXCL_LINE
@@ -4122,11 +3514,6 @@ class binary_reader
    /// the containers that have been opened and not closed yet; see @ref container_frame
    std::vector<container_frame> container_stack{};
    /// BON8: bytes read past the end of a string, returned again by @ref get_bon8
    std::array<char_int_type, 2> bon8_pushback{{}};
    /// BON8: number of bytes in @ref bon8_pushback
    std::size_t bon8_pushback_size = 0;
    // excluded markers in bjdata optimized type
 #define JSON_BINARY_READER_MAKE_BJD_OPTIMIZED_TYPE_MARKERS_ \
    make_array<char_int_type>('F', 'H', 'N', 'S', 'T', 'Z', '[', '{')
@@ -34,7 +34,7 @@ namespace detail
 {
 /// the supported input formats
-enum class input_format_t { json, cbor, msgpack, ubjson, bson, bjdata, bon8 };
+enum class input_format_t { json, cbor, msgpack, ubjson, bson, bjdata };
 ////////////////////
 // input adapters //
@@ -201,43 +201,6 @@ inline std::size_t validate_one_utf8(const unsigned char* data, std::size_t avai
    return 0; // invalid, incomplete, or must be diagnosed by the byte path
 }
 // Return the length of the longest prefix of [data, data+n) that consists of
 // ASCII characters and complete well-formed UTF-8 sequences; n if all of it is
 // valid UTF-8. Unlike scalar_string_bulk_run(), quotes, escapes, and control
 // characters are ordinary characters here. ASCII is skipped 8 bytes at a time.
 inline std::size_t valid_utf8_prefix(const unsigned char* data, std::size_t n) noexcept
 {
    constexpr std::uint64_t high = 0x8080808080808080ull;
    std::size_t pos = 0;
    while (pos < n)
    {
        if (pos + 8 <= n)
        {
            std::uint64_t word = 0;
            std::memcpy(&word, data + pos, sizeof(word));
            if ((word & high) == 0)
            {
                pos += 8;
                continue;
            }
        }
        if (data[pos] < 0x80u)
        {
            ++pos;
            continue;
        }
        const std::size_t seq = validate_one_utf8(data + pos, n - pos);
        if (seq == 0)
        {
            break; // ill-formed or truncated
        }
        pos += seq;
    }
    return pos;
 }
 // Scalar (C++11) computation of the bulk run length: the number of leading
 // bytes in [data, data+n) that are ordinary ASCII or complete well-formed UTF-8
 // sequences, stopping before the first byte that needs individual handling (the
@@ -25,7 +25,6 @@
 #endif
 #include <nlohmann/detail/input/binary_reader.hpp>
 #include <nlohmann/detail/input/string_scan.hpp>
 #include <nlohmann/detail/macro_scope.hpp>
 #include <nlohmann/detail/output/output_adapters.hpp>
 #include <nlohmann/detail/string_concat.hpp>
@@ -77,7 +76,7 @@ std::size_t binary_reserve_hint(const BasicJsonType& j)
 }
 /*!
-@brief serialization to BJData, BON8, BSON, CBOR, MessagePack, and UBJSON values
+@brief serialization to CBOR and MessagePack values
 */
 template<typename BasicJsonType, typename CharType, typename OutputSinkType = output_adapter_sink<CharType>>
 class binary_writer
@@ -1033,21 +1032,6 @@ class binary_writer
        }
    }
    /*!
    @param[in] j  JSON value to serialize
    */
    void write_bon8(const BasicJsonType& j)
    {
        bool string_open = false;
        write_bon8_value(j, string_open);
        // the last string of a message must be terminated
        if (string_open)
        {
            oa.write_character(to_char_type(0xFF));
        }
    }
  private:
    //////////
    // BSON //
@@ -1566,28 +1550,6 @@ class binary_writer
        return to_char_type(0xCB);  // float 64
    }
    /// @return the BON8 type marker for binary32 (float) or binary64 (double)
    template<typename FloatType>
    static constexpr CharType get_bon8_float_prefix()
    {
        return to_char_type(std::is_same<FloatType, float>::value ? 0x8E : 0x8F);
    }
    /// @return the type marker for a FloatType value in @a format (CBOR, MessagePack, or BON8)
    template<typename FloatType>
    static CharType get_compact_float_prefix(const detail::input_format_t format)
    {
        if (format == detail::input_format_t::cbor)
        {
            return get_cbor_float_prefix(FloatType{});
        }
        if (format == detail::input_format_t::bon8)
        {
            return get_bon8_float_prefix<FloatType>();
        }
        return get_msgpack_float_prefix(FloatType{});
    }
    ////////////
    // UBJSON //
    ////////////
@@ -2180,322 +2142,6 @@ class binary_writer
        return false;
    }
    //////////
    // BON8 //
    //////////
    /*!
    @brief write a BON8 value
    A string is written without length or terminator: it ends at the first
    byte that cannot continue it, which is the first byte of any non-string
    value and of the end-of-container marker 0xFE. It only needs an explicit
    end-of-string marker (0xFF) when it is empty, when another string follows,
    or when it is the last thing in the message.
    @param[in] j                JSON value to serialize
    @param[in,out] string_open  whether the output ends with a non-empty
                                string that has not been terminated with 0xFF
    */
    void write_bon8_value(const BasicJsonType& j, bool& string_open)
    {
        switch (j.type())
        {
            case value_t::null:
            {
                write_bon8_marker(0xFA, string_open);
                break;
            }
            case value_t::boolean:
            {
                write_bon8_marker(j.m_data.m_value.boolean ? 0xF9 : 0xF8, string_open);
                break;
            }
            case value_t::number_unsigned:
            {
                if (j.m_data.m_value.number_unsigned > static_cast<typename BasicJsonType::number_unsigned_t>((std::numeric_limits<std::int64_t>::max)()))
                {
                    JSON_THROW(out_of_range::create(407, concat("integer number ", std::to_string(j.m_data.m_value.number_unsigned), " cannot be represented by BON8 as it does not fit int64"), &j));
                }
                write_bon8_integer(static_cast<std::int64_t>(j.m_data.m_value.number_unsigned));
                string_open = false;
                break;
            }
            case value_t::number_integer:
            {
                write_bon8_integer(static_cast<std::int64_t>(j.m_data.m_value.number_integer));
                string_open = false;
                break;
            }
            case value_t::number_float:
            {
                write_bon8_float(j.m_data.m_value.number_float);
                string_open = false;
                break;
            }
            case value_t::string:
            {
                write_bon8_string(*j.m_data.m_value.string, string_open, j);
                break;
            }
            case value_t::array:
            {
                const auto N = j.m_data.m_value.array->size();
                // 0x80..0x84: array with 0..4 elements; 0x85: array ended by 0xFE
                write_bon8_marker(static_cast<std::uint8_t>(N <= 4 ? 0x80 + N : 0x85), string_open);
                for (const auto& el : *j.m_data.m_value.array)
                {
                    write_bon8_value(el, string_open);
                }
                if (N > 4)
                {
                    write_bon8_marker(0xFE, string_open);
                }
                break;
            }
            case value_t::object:
            {
                const auto N = j.m_data.m_value.object->size();
                // 0x86..0x8A: object with 0..4 members; 0x8B: object ended by 0xFE
                write_bon8_marker(static_cast<std::uint8_t>(N <= 4 ? 0x86 + N : 0x8B), string_open);
                for (const auto& el : *j.m_data.m_value.object)
                {
                    write_bon8_string(el.first, string_open, j);
                    write_bon8_value(el.second, string_open);
                }
                if (N > 4)
                {
                    write_bon8_marker(0xFE, string_open);
                }
                break;
            }
            case value_t::binary:
            {
                // BON8 has no binary type: write the bytes as an array of
                // integers, like UBJSON and BJData do
                const auto N = j.m_data.m_value.binary->size();
                write_bon8_marker(static_cast<std::uint8_t>(N <= 4 ? 0x80 + N : 0x85), string_open);
                for (std::size_t i = 0; i < N; ++i)
                {
                    // the cast is needed for binary types whose value type
                    // is not an integer (e.g., std::byte)
                    write_bon8_integer(static_cast<std::uint8_t>(j.m_data.m_value.binary->data()[i]));
                }
                if (N > 4)
                {
                    write_bon8_marker(0xFE, string_open);
                }
                break;
            }
            case value_t::discarded:
            default:
                break;
        }
    }
    /*!
    @brief write a single byte that is not part of a string
    @param[in] marker        the byte to write
    @param[out] string_open  set to false, because the output no longer ends
                             with a string; see @ref write_bon8_value
    */
    void write_bon8_marker(const std::uint8_t marker, bool& string_open)
    {
        oa.write_character(to_char_type(marker));
        string_open = false;
    }
    /*!
    @brief write a string
    @param[in] s                the string to write
    @param[in,out] string_open  see @ref write_bon8_value
    @param[in] context          the value the string belongs to (for diagnostics)
    @throw type_error.316 if @a s is not valid UTF-8, because the end of a
           string is determined from its encoding
    */
    void write_bon8_string(const string_t& s, bool& string_open, const BasicJsonType& context)
    {
        check_bon8_utf8(s, context);
        // a string that follows another string terminates it
        if (string_open)
        {
            oa.write_character(to_char_type(0xFF));
        }
        if (s.empty())
        {
            // the empty string is just the end-of-string marker
            oa.write_character(to_char_type(0xFF));
            string_open = false;
        }
        else
        {
            oa.write_characters(reinterpret_cast<const CharType*>(s.data()), s.size());
            string_open = true;
        }
    }
    /*!
    @brief check that a string is valid UTF-8 (RFC 3629)
    @param[in] s        the string to check
    @param[in] context  the value the string belongs to (for diagnostics)
    @throw type_error.316 if @a s is not valid UTF-8; the message names the
           first byte of the first invalid or incomplete sequence
    */
    static void check_bon8_utf8(const string_t& s, const BasicJsonType& context)
    {
        static_cast<void>(context); // only used when exceptions are enabled
        const auto* data = reinterpret_cast<const unsigned char*>(s.data());
        const std::size_t valid = valid_utf8_prefix(data, s.size());
        if (JSON_HEDLEY_UNLIKELY(valid != s.size()))
        {
            JSON_THROW(type_error::create(316, concat("invalid UTF-8 byte at index ", std::to_string(valid), ": 0x", hex_byte(data[valid])), &context));
        }
    }
    /// @return a byte as two uppercase hexadecimal digits
    static std::string hex_byte(const std::uint8_t byte)
    {
        std::string result = "00";
        constexpr const char* nibble_to_hex = "0123456789ABCDEF";
        result[0] = nibble_to_hex[byte / 16];
        result[1] = nibble_to_hex[byte % 16];
        return result;
    }
    /*!
    @brief write an integer in the shortest encoding
    Integers from -10 to 39 take one byte. Up to -33818506 and 67637031, an
    integer takes 2 to 4 bytes that begin with a UTF-8 lead byte (0xC2..0xF7)
    followed by a byte that is not a continuation byte: 0x00..0x7F for
    positive and 0xC0..0xFF for negative integers. Each range starts where the
    shorter one ends. Larger integers are written as int32 (0x8C) or int64
    (0x8D) in big-endian byte order.
    @param[in] value  the integer to write
    */
    void write_bon8_integer(std::int64_t value)
    {
        if (value < (std::numeric_limits<std::int32_t>::min)() || value > (std::numeric_limits<std::int32_t>::max)())
        {
            oa.write_character(to_char_type(0x8D));
            write_number(value);
        }
        else if (value < -33818506 || value > 67637031)
        {
            oa.write_character(to_char_type(0x8C));
            write_number(static_cast<std::int32_t>(value));
        }
        else if (value <= -264075)
        {
            value = -(value + 264075);
            write_bon8_bytes(0xF0 + ((value >> 22) & 0x07), 0xC0 + ((value >> 16) & 0x3F), value >> 8, value);
        }
        else if (value <= -1931)
        {
            value = -(value + 1931);
            write_bon8_bytes(0xE0 + ((value >> 14) & 0x0F), 0xC0 + ((value >> 8) & 0x3F), value);
        }
        else if (value <= -11)
        {
            value = -(value + 11);
            write_bon8_bytes(0xC2 + ((value >> 6) & 0x1F), 0xC0 + (value & 0x3F));
        }
        else if (value <= -1)
        {
            write_bon8_bytes(0xB8 - (value + 1));
        }
        else if (value <= 39)
        {
            write_bon8_bytes(0x90 + value);
        }
        else if (value <= 3879)
        {
            value -= 40;
            write_bon8_bytes(0xC2 + ((value >> 7) & 0x1F), value & 0x7F);
        }
        else if (value <= 528167)
        {
            value -= 3880;
            write_bon8_bytes(0xE0 + ((value >> 15) & 0x0F), (value >> 8) & 0x7F, value);
        }
        else
        {
            value -= 528168;
            write_bon8_bytes(0xF0 + ((value >> 23) & 0x07), (value >> 16) & 0x7F, value >> 8, value);
        }
    }
    /// write the low byte of each argument
    template<typename... Bytes>
    void write_bon8_bytes(const Bytes... bytes)
    {
        const std::array<CharType, sizeof...(Bytes)> buffer{{to_char_type(static_cast<std::uint8_t>(bytes & 0xFF))...}};
        oa.write_characters(buffer.data(), buffer.size());
    }
    /*!
    @brief write a floating-point number
    -1.0, +0.0, and 1.0 take one byte. Other numbers are written as binary32
    (0x8E) if that loses no precision, and as binary64 (0x8F) otherwise; -0.0,
    infinities, and NaN are always written as binary32, NaN as 0x7F800001.
    @param[in] n  the number to write
    */
    void write_bon8_float(const number_float_t n)
    {
 #ifdef __GNUC__
        JSON_HEDLEY_DIAGNOSTIC_PUSH
        JSON_HEDLEY_PRAGMA(GCC diagnostic ignored "-Wfloat-equal")
 #endif
        if (n == static_cast<number_float_t>(-1))
        {
            oa.write_character(to_char_type(0xFB));
        }
        else if (n == static_cast<number_float_t>(0) && !std::signbit(n))
        {
            oa.write_character(to_char_type(0xFC));
        }
        else if (n == static_cast<number_float_t>(1))
        {
            oa.write_character(to_char_type(0xFD));
        }
        else if (std::isnan(n))
        {
            write_bon8_bytes(0x8E, 0x7F, 0x80, 0x00, 0x01);
        }
        else
        {
            write_compact_float(n, detail::input_format_t::bon8);
        }
 #ifdef __GNUC__
        JSON_HEDLEY_DIAGNOSTIC_POP
 #endif
    }
    ///////////////////////
    // Utility functions //
    ///////////////////////
@@ -2630,12 +2276,16 @@ class binary_writer
                                   static_cast<double>(n) <= static_cast<double>((std::numeric_limits<float>::max)()) &&
                                   static_cast<double>(static_cast<float>(n)) == static_cast<double>(n))))
        {
-            oa.write_character(get_compact_float_prefix<float>(format));
+            oa.write_character(format == detail::input_format_t::cbor
                               ? get_cbor_float_prefix(static_cast<float>(n))
                               : get_msgpack_float_prefix(static_cast<float>(n)));
            write_number(static_cast<float>(n));
        }
        else
        {
-            oa.write_character(get_compact_float_prefix<number_float_t>(format));
+            oa.write_character(format == detail::input_format_t::cbor
                               ? get_cbor_float_prefix(n)
                               : get_msgpack_float_prefix(n));
            write_number(n);
        }
 #ifdef __GNUC__
@@ -1687,8 +1687,8 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
        if (is_an_object)
        {
            // the initializer list is a list of pairs -> create an object
            m_data.m_type = value_t::object;
            m_data.m_value = value_t::object;
            m_data.m_type = value_t::object;
            for (auto& element_ref : init)
            {
@@ -1710,8 +1710,8 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
            }
 #endif
            // the initializer list describes an array -> create an array
            m_data.m_type = value_t::array;
            m_data.m_value.array = create<array_t>(init.begin(), init.end());
            m_data.m_type = value_t::array;
        }
        set_parents();
@@ -1724,8 +1724,8 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
    static basic_json binary(const typename binary_t::container_type& init)
    {
        auto res = basic_json();
        res.m_data.m_type = value_t::binary;
        res.m_data.m_value = init;
        res.m_data.m_type = value_t::binary;
        return res;
    }
@@ -1735,8 +1735,8 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
    static basic_json binary(const typename binary_t::container_type& init, typename binary_t::subtype_type subtype)
    {
        auto res = basic_json();
        res.m_data.m_type = value_t::binary;
        res.m_data.m_value = binary_t(init, subtype);
        res.m_data.m_type = value_t::binary;
        return res;
    }
@@ -1746,8 +1746,8 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
    static basic_json binary(typename binary_t::container_type&& init)
    {
        auto res = basic_json();
        res.m_data.m_type = value_t::binary;
        res.m_data.m_value = std::move(init);
        res.m_data.m_type = value_t::binary;
        return res;
    }
@@ -1757,8 +1757,8 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
    static basic_json binary(typename binary_t::container_type&& init, typename binary_t::subtype_type subtype)
    {
        auto res = basic_json();
        res.m_data.m_type = value_t::binary;
        res.m_data.m_value = binary_t(std::move(init), subtype);
        res.m_data.m_type = value_t::binary;
        return res;
    }
@@ -2815,8 +2815,8 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
        // implicitly convert a null value to an empty array
        if (is_null())
        {
            m_data.m_type = value_t::array;
            m_data.m_value.array = create<array_t>();
            m_data.m_type = value_t::array;
            assert_invariant();
        }
@@ -2875,8 +2875,8 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
        // implicitly convert a null value to an empty object
        if (is_null())
        {
            m_data.m_type = value_t::object;
            m_data.m_value.object = create<object_t>();
            m_data.m_type = value_t::object;
            assert_invariant();
        }
@@ -2928,8 +2928,8 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
        // implicitly convert a null value to an empty object
        if (is_null())
        {
            m_data.m_type = value_t::object;
            m_data.m_value.object = create<object_t>();
            m_data.m_type = value_t::object;
            assert_invariant();
        }
@@ -3864,8 +3864,8 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
        // transform a null object into an array
        if (is_null())
        {
            m_data.m_type = value_t::array;
            m_data.m_value = value_t::array;
            m_data.m_type = value_t::array;
            assert_invariant();
        }
@@ -3897,8 +3897,8 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
        // transform a null object into an array
        if (is_null())
        {
            m_data.m_type = value_t::array;
            m_data.m_value = value_t::array;
            m_data.m_type = value_t::array;
            assert_invariant();
        }
@@ -3929,8 +3929,8 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
        // transform a null object into an object
        if (is_null())
        {
            m_data.m_type = value_t::object;
            m_data.m_value = value_t::object;
            m_data.m_type = value_t::object;
            assert_invariant();
        }
@@ -3985,8 +3985,8 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
        // transform a null object into an array
        if (is_null())
        {
            m_data.m_type = value_t::array;
            m_data.m_value = value_t::array;
            m_data.m_type = value_t::array;
            assert_invariant();
        }
@@ -4010,8 +4010,8 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
        // transform a null object into an object
        if (is_null())
        {
            m_data.m_type = value_t::object;
            m_data.m_value = value_t::object;
            m_data.m_type = value_t::object;
            assert_invariant();
        }
@@ -4192,8 +4192,8 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
        // implicitly convert a null value to an empty object
        if (is_null())
        {
            m_data.m_type = value_t::object;
            m_data.m_value.object = create<object_t>();
            m_data.m_type = value_t::object;
            assert_invariant();
        }
@@ -5286,30 +5286,6 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
        binary_writer<char>(o).write_bson(j);
    }
    /// @brief create a BON8 serialization of a given JSON value
    /// @sa https://json.nlohmann.me/api/basic_json/to_bon8/
    static std::vector<std::uint8_t> to_bon8(const basic_json& j)
    {
        std::vector<std::uint8_t> result;
        result.reserve(detail::binary_reserve_hint(j));
        vector_writer(result).write_bon8(j);
        return result;
    }
    /// @brief create a BON8 serialization of a given JSON value
    /// @sa https://json.nlohmann.me/api/basic_json/to_bon8/
    static void to_bon8(const basic_json& j, detail::output_adapter<std::uint8_t> o)
    {
        binary_writer<std::uint8_t>(o).write_bon8(j);
    }
    /// @brief create a BON8 serialization of a given JSON value
    /// @sa https://json.nlohmann.me/api/basic_json/to_bon8/
    static void to_bon8(const basic_json& j, detail::output_adapter<char> o)
    {
        binary_writer<char>(o).write_bon8(j);
    }
    /// @brief create a JSON value from an input in CBOR format
    /// @sa https://json.nlohmann.me/api/basic_json/from_cbor/
    template<typename InputType>
@@ -5543,43 +5519,6 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
        return result;
    }
    /// @brief create a JSON value from an input in BON8 format
    /// @sa https://json.nlohmann.me/api/basic_json/from_bon8/
    template<typename InputType>
    JSON_HEDLEY_WARN_UNUSED_RESULT
    static basic_json from_bon8(InputType&& i,
                                const bool strict = true,
                                const bool allow_exceptions = true)
    {
        basic_json result;
        auto ia = detail::input_adapter(std::forward<InputType>(i));
        detail::json_sax_dom_parser<basic_json, decltype(ia)> sdp(result, allow_exceptions);
        if (!binary_reader<decltype(ia)>(std::move(ia), input_format_t::bon8).sax_parse(input_format_t::bon8, &sdp, strict)) // cppcheck-suppress[accessMoved]
        {
            result = value_t::discarded;
        }
        return result;
    }
    /// @brief create a JSON value from an input in BON8 format (iterator pair, or iterator+sentinel pair for C++20 ranges support)
    /// @sa https://json.nlohmann.me/api/basic_json/from_bon8/
    template<typename IteratorType, typename SentinelType = IteratorType,
             detail::enable_if_t<detail::can_compare_ne<IteratorType, SentinelType>::value, int> = 0>
    JSON_HEDLEY_WARN_UNUSED_RESULT
    static basic_json from_bon8(IteratorType first, SentinelType last,
                                const bool strict = true,
                                const bool allow_exceptions = true)
    {
        basic_json result;
        auto ia = detail::input_adapter(std::move(first), std::move(last));
        detail::json_sax_dom_parser<basic_json, decltype(ia)> sdp(result, allow_exceptions);
        if (!binary_reader<decltype(ia)>(std::move(ia), input_format_t::bon8).sax_parse(input_format_t::bon8, &sdp, strict)) // cppcheck-suppress[accessMoved]
        {
            result = value_t::discarded;
        }
        return result;
    }
    /// @brief create a JSON value from an input in BSON format
    /// @sa https://json.nlohmann.me/api/basic_json/from_bson/
    template<typename InputType>
@@ -112,7 +112,7 @@ endif()
 if (CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
    # avoid stack overflow, see https://github.com/nlohmann/json/issues/2955
-    json_test_set_test_options("test-bon8;test-cbor;test-msgpack;test-ubjson;test-bjdata;test-binary_formats" LINK_OPTIONS /STACK:4000000)
+    json_test_set_test_options("test-cbor;test-msgpack;test-ubjson;test-bjdata;test-binary_formats" LINK_OPTIONS /STACK:4000000)
 endif()
 # disable exceptions for test-disabled_exceptions
@@ -10,7 +10,7 @@ CXXFLAGS += -std=c++11
 CPPFLAGS += -I ../single_include
 FUZZER_ENGINE = src/fuzzer-driver_afl.cpp
-FUZZERS = parse_afl_fuzzer parse_bson_fuzzer parse_cbor_fuzzer parse_msgpack_fuzzer parse_ubjson_fuzzer parse_bjdata_fuzzer parse_bon8_fuzzer
+FUZZERS = parse_afl_fuzzer parse_bson_fuzzer parse_cbor_fuzzer parse_msgpack_fuzzer parse_ubjson_fuzzer parse_bjdata_fuzzer
 fuzzers: $(FUZZERS)
 parse_afl_fuzzer:
@@ -30,6 +30,3 @@ parse_ubjson_fuzzer:
 parse_bjdata_fuzzer:
 	$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(FUZZER_ENGINE) src/fuzzer-parse_bjdata.cpp -o $@
 parse_bon8_fuzzer:
 	$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(FUZZER_ENGINE) src/fuzzer-parse_bon8.cpp -o $@
@@ -274,8 +274,7 @@ enum class binary_format
    ubjson_optimized,
    bjdata,
    bjdata_optimized,
-    bson,
+    bson
    bon8
 };
 static std::vector<std::uint8_t> to_binary(const json& j, const binary_format format)
@@ -294,8 +293,6 @@ static std::vector<std::uint8_t> to_binary(const json& j, const binary_format fo
            return json::to_bjdata(j);
        case binary_format::bjdata_optimized:
            return json::to_bjdata(j, true, true);
        case binary_format::bon8:
            return json::to_bon8(j);
        case binary_format::bson:
        default:
            return json::to_bson(j);
@@ -316,8 +313,6 @@ static json from_binary(const std::vector<std::uint8_t>& bytes, const binary_for
        case binary_format::bjdata:
        case binary_format::bjdata_optimized:
            return json::from_bjdata(bytes);
        case binary_format::bon8:
            return json::from_bon8(bytes);
        case binary_format::bson:
        default:
            return json::from_bson(bytes);
@@ -338,8 +333,6 @@ static json from_binary(std::FILE* file, const binary_format format)
        case binary_format::bjdata:
        case binary_format::bjdata_optimized:
            return json::from_bjdata(file);
        case binary_format::bon8:
            return json::from_bon8(file);
        case binary_format::bson:
        default:
            return json::from_bson(file);
@@ -414,10 +407,6 @@ BENCHMARK_CAPTURE(FromBinaryBuffer, bjdata / canada, TEST_DATA_DIRECTORY "/nativ
 BENCHMARK_CAPTURE(FromBinaryBuffer, bjdata / twitter, TEST_DATA_DIRECTORY "/nativejson-benchmark/twitter.json", binary_format::bjdata);
 BENCHMARK_CAPTURE(FromBinaryBuffer, bjdata_optimized / canada, TEST_DATA_DIRECTORY "/nativejson-benchmark/canada.json", binary_format::bjdata_optimized);
 BENCHMARK_CAPTURE(FromBinaryBuffer, bjdata_optimized / twitter, TEST_DATA_DIRECTORY "/nativejson-benchmark/twitter.json", binary_format::bjdata_optimized);
 BENCHMARK_CAPTURE(FromBinaryBuffer, bon8 / jeopardy, TEST_DATA_DIRECTORY "/jeopardy/jeopardy.json", binary_format::bon8);
 BENCHMARK_CAPTURE(FromBinaryBuffer, bon8 / canada, TEST_DATA_DIRECTORY "/nativejson-benchmark/canada.json", binary_format::bon8);
 BENCHMARK_CAPTURE(FromBinaryBuffer, bon8 / citm_catalog, TEST_DATA_DIRECTORY "/nativejson-benchmark/citm_catalog.json", binary_format::bon8);
 BENCHMARK_CAPTURE(FromBinaryBuffer, bon8 / twitter, TEST_DATA_DIRECTORY "/nativejson-benchmark/twitter.json", binary_format::bon8);
 // BSON requires an object at the top level, so the array-rooted test files
 // (jeopardy and the regression files) cannot be captured here
 BENCHMARK_CAPTURE(FromBinaryBuffer, bson / canada, TEST_DATA_DIRECTORY "/nativejson-benchmark/canada.json", binary_format::bson);
@@ -461,8 +450,6 @@ BENCHMARK_CAPTURE(FromBinaryFile, cbor / twitter, TEST_DATA_DIRECTORY "/nativejs
 BENCHMARK_CAPTURE(FromBinaryFile, ubjson / canada, TEST_DATA_DIRECTORY "/nativejson-benchmark/canada.json", binary_format::ubjson);
 BENCHMARK_CAPTURE(FromBinaryFile, ubjson / twitter, TEST_DATA_DIRECTORY "/nativejson-benchmark/twitter.json", binary_format::ubjson);
 BENCHMARK_CAPTURE(FromBinaryFile, bjdata / twitter, TEST_DATA_DIRECTORY "/nativejson-benchmark/twitter.json", binary_format::bjdata);
 BENCHMARK_CAPTURE(FromBinaryFile, bon8 / canada, TEST_DATA_DIRECTORY "/nativejson-benchmark/canada.json", binary_format::bon8);
 BENCHMARK_CAPTURE(FromBinaryFile, bon8 / twitter, TEST_DATA_DIRECTORY "/nativejson-benchmark/twitter.json", binary_format::bon8);
 BENCHMARK_CAPTURE(FromBinaryFile, bson / twitter, TEST_DATA_DIRECTORY "/nativejson-benchmark/twitter.json", binary_format::bson);
 //////////////////////////////////////////////////////////////////////////////
@@ -543,21 +530,18 @@ BENCHMARK_CAPTURE(FromBinaryShape, nested / msgpack, make_nested, binary_format:
 BENCHMARK_CAPTURE(FromBinaryShape, nested / ubjson, make_nested, binary_format::ubjson);
 BENCHMARK_CAPTURE(FromBinaryShape, nested / bjdata, make_nested, binary_format::bjdata);
 BENCHMARK_CAPTURE(FromBinaryShape, nested / bson, make_nested, binary_format::bson);
 BENCHMARK_CAPTURE(FromBinaryShape, nested / bon8, make_nested, binary_format::bon8);
 BENCHMARK_CAPTURE(FromBinaryShape, containers / cbor, make_containers, binary_format::cbor);
 BENCHMARK_CAPTURE(FromBinaryShape, containers / msgpack, make_containers, binary_format::msgpack);
 BENCHMARK_CAPTURE(FromBinaryShape, containers / ubjson, make_containers, binary_format::ubjson);
 BENCHMARK_CAPTURE(FromBinaryShape, containers / ubjson_optimized, make_containers, binary_format::ubjson_optimized);
 BENCHMARK_CAPTURE(FromBinaryShape, containers / bjdata, make_containers, binary_format::bjdata);
 BENCHMARK_CAPTURE(FromBinaryShape, containers / bson, make_containers, binary_format::bson);
 BENCHMARK_CAPTURE(FromBinaryShape, containers / bon8, make_containers, binary_format::bon8);
 // BSON names every array element, so a large array measures key generation
 // rather than scalar decoding and is left out here
 BENCHMARK_CAPTURE(FromBinaryShape, scalars / cbor, make_scalars, binary_format::cbor);
 BENCHMARK_CAPTURE(FromBinaryShape, scalars / msgpack, make_scalars, binary_format::msgpack);
 BENCHMARK_CAPTURE(FromBinaryShape, scalars / ubjson, make_scalars, binary_format::ubjson);
 BENCHMARK_CAPTURE(FromBinaryShape, scalars / bjdata, make_scalars, binary_format::bjdata);
 BENCHMARK_CAPTURE(FromBinaryShape, scalars / bon8, make_scalars, binary_format::bon8);
 /*!
@brief parse an indefinite-length CBOR string
@@ -1,6 +1,6 @@
 # Fuzz testing
-Each parser of the library (JSON, BJData, BON8, BSON, CBOR, MessagePack, and UBJSON) can be fuzz tested. Currently,
+Each parser of the library (JSON, BJData, BSON, CBOR, MessagePack, and UBJSON) can be fuzz tested. Currently,
 [libFuzzer](https://llvm.org/docs/LibFuzzer.html) and [afl++](https://github.com/AFLplusplus/AFLplusplus) are supported.
 ## Corpus creation
@@ -10,11 +10,11 @@ directory with some simple input files that cover several features of the parser
 for mutations.
 ```shell
-TEST_DATA_VERSION=3.2.0
+TEST_DATA_VERSION=3.1.0
 wget https://github.com/nlohmann/json_test_data/archive/refs/tags/v$TEST_DATA_VERSION.zip
 unzip v$TEST_DATA_VERSION.zip
 rm v$TEST_DATA_VERSION.zip
-for FORMAT in json bjdata bon8 bson cbor msgpack ubjson
+for FORMAT in json bjdata bson cbor msgpack ubjson
 do
  rm -fr corpus_$FORMAT
  mkdir corpus_$FORMAT
@@ -1,103 +0,0 @@
 //     __ _____ _____ _____
 //  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
 // SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 /*
 This file implements a parser test suitable for fuzz testing. Given a byte
 array data, it performs the following steps:
 - j1 = from_bon8(data)
 - vec = to_bon8(j1)
 - j2 = from_bon8(vec)
 - assert(j1 == j2)
 It also checks that reading the data from a stream, which reads strings byte by
 byte, gives the same value or error as reading it from contiguous memory, which
 copies strings in bulk.
 The provided function `LLVMFuzzerTestOneInput` can be used in different fuzzer
 drivers.
 */
 #include <cassert>
 #include <iostream>
 #include <sstream>
 #include <nlohmann/json.hpp>
 // the round-trip checks below are assertions; NDEBUG would compile them away
 #ifdef NDEBUG
    #error "the fuzzer drivers must be built without NDEBUG"
 #endif
 using json = nlohmann::json;
 namespace
 {
 // the serialization of the value read from @a input, or the error message
 template<typename InputType>
 std::string read_bon8(InputType&& input)
 {
    try
    {
        const auto vec = json::to_bon8(json::from_bon8(std::forward<InputType>(input)));
        return {vec.begin(), vec.end()};
    }
    catch (const json::exception& e)
    {
        return e.what();
    }
 }
 } // namespace
 // see http://llvm.org/docs/LibFuzzer.html
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
 {
    // contiguous and stream input must be read alike
    {
        std::istringstream stream(std::string(reinterpret_cast<const char*>(data), size));
        assert(read_bon8(std::vector<uint8_t>(data, data + size)) == read_bon8(stream));
    }
    try
    {
        // step 1: parse input
        std::vector<uint8_t> const vec1(data, data + size);
        json const j1 = json::from_bon8(vec1);
        try
        {
            // step 2: round trip
            std::vector<uint8_t> const vec2 = json::to_bon8(j1);
            // parse serialization
            json const j2 = json::from_bon8(vec2);
            // serializations must match
            assert(json::to_bon8(j2) == vec2);
        }
        catch (const json::parse_error&)
        {
            // parsing a BON8 serialization must not fail
            assert(false);
        }
    }
    catch (const json::parse_error&)
    {
        // parse errors are ok, because input may be random bytes
    }
    catch (const json::type_error&)
    {
        // type errors can occur during parsing, too
    }
    catch (const json::out_of_range&)
    {
        // out of range errors may happen if provided sizes are excessive
    }
    // return 0 - non-zero return values are reserved for future use
    return 0;
 }
@@ -388,3 +388,120 @@ TEST_CASE("bad my_allocator::construct")
        j["test"].push_back("should not leak");
    }
 }
 // the no-exceptions CI job skips every CHECK_THROWS_AS, which would leave
 // next_construct_fails set for the next allocation outside a check
 #if !defined(JSON_NOEXCEPTION)
 TEST_CASE("a failed allocation leaves the value unchanged")
 {
    // create JSON type using the throwing allocator
    using my_json = nlohmann::basic_json<std::map,
          std::vector,
          std::string,
          bool,
          std::int64_t,
          std::uint64_t,
          double,
          my_allocator>;
    // Each of these creates a string, array, object, or binary value. The
    // value must be created before the type is changed: otherwise, a failed
    // creation left a value of the new type without anything behind it (an
    // assertion in its destructor, a null pointer everywhere else) or, when
    // an old value was destroyed first, with a pointer to that destroyed one.
    SECTION("creating a binary value")
    {
        const std::vector<std::uint8_t> bytes = {1, 2, 3};
        my_json _;
        next_construct_fails = true;
        CHECK_THROWS_AS(_ = my_json::binary(bytes), std::bad_alloc&);
        next_construct_fails = true;
        CHECK_THROWS_AS(_ = my_json::binary(bytes, 42), std::bad_alloc&);
        next_construct_fails = true;
        CHECK_THROWS_AS(_ = my_json::binary(std::vector<std::uint8_t>(bytes)), std::bad_alloc&);
        next_construct_fails = true;
        CHECK_THROWS_AS(_ = my_json::binary(std::vector<std::uint8_t>(bytes), 42), std::bad_alloc&);
        next_construct_fails = false;
    }
    SECTION("turning a null value into an array or object")
    {
        my_json j;
        next_construct_fails = true;
        CHECK_THROWS_AS(j[0], std::bad_alloc&);
        CHECK(j.is_null());
        next_construct_fails = true;
        CHECK_THROWS_AS(j["key"], std::bad_alloc&);
        CHECK(j.is_null());
 #ifdef JSON_HAS_CPP_17
        next_construct_fails = true;
        CHECK_THROWS_AS(j[std::string_view("key")], std::bad_alloc&);
        CHECK(j.is_null());
 #endif
        next_construct_fails = true;
        CHECK_THROWS_AS(j.push_back(my_json(1)), std::bad_alloc&);
        CHECK(j.is_null());
        const my_json one = 1;
        next_construct_fails = true;
        CHECK_THROWS_AS(j.push_back(one), std::bad_alloc&);
        CHECK(j.is_null());
        next_construct_fails = true;
        CHECK_THROWS_AS(j.push_back(my_json::object_t::value_type("key", 1)), std::bad_alloc&);
        CHECK(j.is_null());
        next_construct_fails = true;
        CHECK_THROWS_AS(j.emplace_back(1), std::bad_alloc&);
        CHECK(j.is_null());
        next_construct_fails = true;
        CHECK_THROWS_AS(j.emplace("key", 1), std::bad_alloc&);
        CHECK(j.is_null());
        const my_json object = {{"key", 1}};
        next_construct_fails = true;
        CHECK_THROWS_AS(j.update(object), std::bad_alloc&);
        CHECK(j.is_null());
        next_construct_fails = false;
    }
    SECTION("converting into an existing value")
    {
        // to_json replaces the value it is given; the old one must survive a
        // failed creation of the new one
        my_json j = "old";
        next_construct_fails = true;
        CHECK_THROWS_AS(nlohmann::to_json(j, std::string("new")), std::bad_alloc&);
        CHECK(j == "old");
        next_construct_fails = true;
        CHECK_THROWS_AS(nlohmann::to_json(j, std::vector<int> {1, 2}), std::bad_alloc&);
        CHECK(j == "old");
        next_construct_fails = true;
        CHECK_THROWS_AS(nlohmann::to_json(j, std::vector<bool> {true, false}), std::bad_alloc&);
        CHECK(j == "old");
        next_construct_fails = true;
        CHECK_THROWS_AS(nlohmann::to_json(j, std::map<std::string, int> {{"a", 1}}), std::bad_alloc&);
        CHECK(j == "old");
        next_construct_fails = true;
        CHECK_THROWS_AS(nlohmann::to_json(j, my_json::binary_t({1, 2})), std::bad_alloc&);
        CHECK(j == "old");
        next_construct_fails = false;
        nlohmann::to_json(j, std::vector<int> {1, 2});
        CHECK(j == my_json({1, 2}));
    }
 }
 #endif
@@ -185,7 +185,6 @@ TEST_CASE("alternative string type")
        CHECK(alt_json::from_cbor(alt_json::to_cbor(doc)) == doc);
        CHECK(alt_json::from_msgpack(alt_json::to_msgpack(doc)) == doc);
        CHECK(alt_json::from_bon8(alt_json::to_bon8(doc)) == doc);
        // BSON is not covered: it additionally needs string_t::find(value_type),
        // which alt_string does not provide
        CHECK(alt_json::from_ubjson(alt_json::to_ubjson(doc)) == doc);
@@ -25,7 +25,6 @@ TEST_CASE("Binary Formats" * doctest::skip())
        const auto bjdata_1_size = json::to_bjdata(j).size();
        const auto bjdata_2_size = json::to_bjdata(j, true).size();
        const auto bjdata_3_size = json::to_bjdata(j, true, true).size();
        const auto bon8_size = json::to_bon8(j).size();
        const auto bson_size = json::to_bson(j).size();
        const auto cbor_size = json::to_cbor(j).size();
        const auto msgpack_size = json::to_msgpack(j).size();
@@ -37,7 +36,6 @@ TEST_CASE("Binary Formats" * doctest::skip())
        CHECK(bjdata_1_size == 1112030);
        CHECK(bjdata_2_size == 1224148);
        CHECK(bjdata_3_size == 1224148);
        CHECK(bon8_size == 1055792);
        CHECK(bson_size == 1794522);
        CHECK(cbor_size == 1055552);
        CHECK(msgpack_size == 1056145);
@@ -49,7 +47,6 @@ TEST_CASE("Binary Formats" * doctest::skip())
        CHECK((100.0 * double(bjdata_1_size) / double(json_size)) == Approx(53.199));
        CHECK((100.0 * double(bjdata_2_size) / double(json_size)) == Approx(58.563));
        CHECK((100.0 * double(bjdata_3_size) / double(json_size)) == Approx(58.563));
        CHECK((100.0 * double(bon8_size) / double(json_size)) == Approx(50.509));
        CHECK((100.0 * double(bson_size) / double(json_size)) == Approx(85.849));
        CHECK((100.0 * double(cbor_size) / double(json_size)) == Approx(50.497));
        CHECK((100.0 * double(msgpack_size) / double(json_size)) == Approx(50.526));
@@ -67,7 +64,6 @@ TEST_CASE("Binary Formats" * doctest::skip())
        const auto bjdata_1_size = json::to_bjdata(j).size();
        const auto bjdata_2_size = json::to_bjdata(j, true).size();
        const auto bjdata_3_size = json::to_bjdata(j, true, true).size();
        const auto bon8_size = json::to_bon8(j).size();
        const auto bson_size = json::to_bson(j).size();
        const auto cbor_size = json::to_cbor(j).size();
        const auto msgpack_size = json::to_msgpack(j).size();
@@ -79,7 +75,6 @@ TEST_CASE("Binary Formats" * doctest::skip())
        CHECK(bjdata_1_size == 425342);
        CHECK(bjdata_2_size == 429970);
        CHECK(bjdata_3_size == 429970);
        CHECK(bon8_size == 391396);
        CHECK(bson_size == 444568);
        CHECK(cbor_size == 402814);
        CHECK(msgpack_size == 401510);
@@ -91,7 +86,6 @@ TEST_CASE("Binary Formats" * doctest::skip())
        CHECK((100.0 * double(bjdata_1_size) / double(json_size)) == Approx(91.097));
        CHECK((100.0 * double(bjdata_2_size) / double(json_size)) == Approx(92.089));
        CHECK((100.0 * double(bjdata_3_size) / double(json_size)) == Approx(92.089));
        CHECK((100.0 * double(bon8_size) / double(json_size)) == Approx(83.828));
        CHECK((100.0 * double(bson_size) / double(json_size)) == Approx(95.215));
        CHECK((100.0 * double(cbor_size) / double(json_size)) == Approx(86.273));
        CHECK((100.0 * double(msgpack_size) / double(json_size)) == Approx(85.993));
@@ -109,7 +103,6 @@ TEST_CASE("Binary Formats" * doctest::skip())
        const auto bjdata_1_size = json::to_bjdata(j).size();
        const auto bjdata_2_size = json::to_bjdata(j, true).size();
        const auto bjdata_3_size = json::to_bjdata(j, true, true).size();
        const auto bon8_size = json::to_bon8(j).size();
        const auto bson_size = json::to_bson(j).size();
        const auto cbor_size = json::to_cbor(j).size();
        const auto msgpack_size = json::to_msgpack(j).size();
@@ -121,7 +114,6 @@ TEST_CASE("Binary Formats" * doctest::skip())
        CHECK(bjdata_1_size == 390781);
        CHECK(bjdata_2_size == 433557);
        CHECK(bjdata_3_size == 432964);
        CHECK(bon8_size == 317879);
        CHECK(bson_size == 479430);
        CHECK(cbor_size == 342373);
        CHECK(msgpack_size == 342473);
@@ -133,7 +125,6 @@ TEST_CASE("Binary Formats" * doctest::skip())
        CHECK((100.0 * double(bjdata_1_size) / double(json_size)) == Approx(78.109));
        CHECK((100.0 * double(bjdata_2_size) / double(json_size)) == Approx(86.659));
        CHECK((100.0 * double(bjdata_3_size) / double(json_size)) == Approx(86.541));
        CHECK((100.0 * double(bon8_size) / double(json_size)) == Approx(63.538));
        CHECK((100.0 * double(bson_size) / double(json_size)) == Approx(95.828));
        CHECK((100.0 * double(cbor_size) / double(json_size)) == Approx(68.433));
        CHECK((100.0 * double(msgpack_size) / double(json_size)) == Approx(68.453));
@@ -151,7 +142,6 @@ TEST_CASE("Binary Formats" * doctest::skip())
        const auto bjdata_1_size = json::to_bjdata(j).size();
        const auto bjdata_2_size = json::to_bjdata(j, true).size();
        const auto bjdata_3_size = json::to_bjdata(j, true, true).size();
        const auto bon8_size = json::to_bon8(j).size();
        const auto bson_size = json::to_bson({{"", j}}).size(); // wrap array in object for BSON
        const auto cbor_size = json::to_cbor(j).size();
        const auto msgpack_size = json::to_msgpack(j).size();
@@ -163,7 +153,6 @@ TEST_CASE("Binary Formats" * doctest::skip())
        CHECK(bjdata_1_size == 50710965);
        CHECK(bjdata_2_size == 51144830);
        CHECK(bjdata_3_size == 51144830);
        CHECK(bon8_size == 45942080);
        CHECK(bson_size == 56008520);
        CHECK(cbor_size == 46187320);
        CHECK(msgpack_size == 46158575);
@@ -175,7 +164,6 @@ TEST_CASE("Binary Formats" * doctest::skip())
        CHECK((100.0 * double(bjdata_1_size) / double(json_size)) == Approx(96.576));
        CHECK((100.0 * double(bjdata_2_size) / double(json_size)) == Approx(97.402));
        CHECK((100.0 * double(bjdata_3_size) / double(json_size)) == Approx(97.402));
        CHECK((100.0 * double(bon8_size) / double(json_size)) == Approx(87.494));
        CHECK((100.0 * double(bson_size) / double(json_size)) == Approx(106.665));
        CHECK((100.0 * double(cbor_size) / double(json_size)) == Approx(87.961));
        CHECK((100.0 * double(msgpack_size) / double(json_size)) == Approx(87.906));
@@ -193,7 +181,6 @@ TEST_CASE("Binary Formats" * doctest::skip())
        const auto bjdata_1_size = json::to_bjdata(j).size();
        const auto bjdata_2_size = json::to_bjdata(j, true).size();
        const auto bjdata_3_size = json::to_bjdata(j, true, true).size();
        const auto bon8_size = json::to_bon8(j).size();
        // BSON cannot process the file as it contains code point  U+0000
        const auto cbor_size = json::to_cbor(j).size();
        const auto msgpack_size = json::to_msgpack(j).size();
@@ -205,7 +192,6 @@ TEST_CASE("Binary Formats" * doctest::skip())
        CHECK(bjdata_1_size == 148695);
        CHECK(bjdata_2_size == 150569);
        CHECK(bjdata_3_size == 150569);
        CHECK(bon8_size == 144477);
        CHECK(cbor_size == 147095);
        CHECK(msgpack_size == 147017);
        CHECK(ubjson_1_size == 148695);
@@ -216,7 +202,6 @@ TEST_CASE("Binary Formats" * doctest::skip())
        CHECK((100.0 * double(bjdata_1_size) / double(json_size)) == Approx(88.153));
        CHECK((100.0 * double(bjdata_2_size) / double(json_size)) == Approx(89.264));
        CHECK((100.0 * double(bjdata_3_size) / double(json_size)) == Approx(89.264));
        CHECK((100.0 * double(bon8_size) / double(json_size)) == Approx(85.653));
        CHECK((100.0 * double(cbor_size) / double(json_size)) == Approx(87.205));
        CHECK((100.0 * double(msgpack_size) / double(json_size)) == Approx(87.158));
        CHECK((100.0 * double(ubjson_1_size) / double(json_size)) == Approx(88.153));
@@ -12,7 +12,6 @@
 using nlohmann::json;
 #include <cstdint>
 #include <limits>
 #include <string>
 #include <vector>
@@ -50,12 +49,6 @@ std::vector<json> test_values()
    };
 }
 // BON8 has no integers above the int64 range, so to_bon8() rejects them
 bool bon8_representable(const json& j)
 {
    return !j.is_number_unsigned() || j.get<std::uint64_t>() <= static_cast<std::uint64_t>((std::numeric_limits<std::int64_t>::max)());
 }
 // values to_bson() accepts: the document must be an object
 std::vector<json> bson_values()
 {
@@ -99,13 +92,6 @@ TEST_CASE("binary writer output sinks")
            json::to_msgpack(j, msgpack);
            CHECK(json::to_msgpack(j) == msgpack);
            if (bon8_representable(j))
            {
                std::vector<std::uint8_t> bon8;
                json::to_bon8(j, bon8);
                CHECK(json::to_bon8(j) == bon8);
            }
            for (const bool use_size :
                    {
                        false, true
@@ -186,10 +172,6 @@ TEST_CASE("binary_reserve_hint never over-reserves")
        CHECK(hint <= json::to_ubjson(j).size());
        CHECK(hint <= json::to_ubjson(j, true, true).size());
        CHECK(hint <= json::to_bjdata(j).size());
        if (bon8_representable(j))
        {
            CHECK(hint <= json::to_bon8(j).size());
        }
    }
    for (const auto& j : bson_values())
@@ -1066,45 +1066,6 @@ TEST_CASE("Incomplete BSON Input")
    }
 }
 // the test catches the exceptions of invalid input
 #if !defined(JSON_NOEXCEPTION)
 TEST_CASE("BSON keys from contiguous and stream input")
 {
    // contiguous input reads a key up to its \x00-byte in one step, a stream
    // reads it byte by byte; both must give the same value or error for the
    // complete document and for every truncation of it
    const json j = {{"", true}, {"k", {1, 2, 3}}, {std::string(40, 'x'), {{"nested key", "value"}}}};
    const std::vector<std::uint8_t> bson = json::to_bson(j);
    CHECK(json::from_bson(bson) == j);
    for (std::size_t length = 0; length <= bson.size(); ++length)
    {
        CAPTURE(length)
        const std::vector<std::uint8_t> input(bson.begin(), bson.begin() + static_cast<std::ptrdiff_t>(length));
        std::string from_vector;
        std::string from_stream;
        try
        {
            from_vector = json::from_bson(input).dump();
        }
        catch (const json::parse_error& e)
        {
            from_vector = e.what();
        }
        try
        {
            std::istringstream stream(std::string(input.begin(), input.end()));
            from_stream = json::from_bson(stream).dump();
        }
        catch (const json::parse_error& e)
        {
            from_stream = e.what();
        }
        CHECK(from_vector == from_stream);
    }
 }
 #endif
 TEST_CASE("Negative size of binary value")
 {
    // invalid BSON: the size of the binary value is -1
@@ -2761,7 +2761,7 @@ TEST_CASE("diagnostic positions: value lifetime, input adapters, and SAX")
        SECTION("binary formats have no text positions")
        {
-            // binary formats (BJData, BON8, BSON, CBOR, MessagePack, UBJSON) are
+            // binary formats (CBOR, MessagePack, UBJSON, BSON, BJData) are
            // parsed via detail::binary_reader, which never sets
            // start_position/end_position on the values it produces (they
            // have no notion of a text offset), so every value's position
@@ -2778,10 +2778,6 @@ TEST_CASE("diagnostic positions: value lifetime, input adapters, and SAX")
            CHECK(from_msgpack.start_pos() == std::string::npos);
            CHECK(from_msgpack.end_pos() == std::string::npos);
            const json from_bon8 = json::from_bon8(json::to_bon8(src));
            CHECK(from_bon8.start_pos() == std::string::npos);
            CHECK(from_bon8.end_pos() == std::string::npos);
            const json from_ubjson = json::from_ubjson(json::to_ubjson(src));
            CHECK(from_ubjson.start_pos() == std::string::npos);
            CHECK(from_ubjson.end_pos() == std::string::npos);
@@ -74,8 +74,6 @@ TEST_CASE("binary type whose value type is not std::uint8_t")
        // UBJSON has no binary type, so binary values are written as an array
        CHECK(byte_binary_json::from_ubjson(byte_binary_json::to_ubjson(j)) == byte_binary_json({0, 1, 255}));
        // the same holds for BON8
        CHECK(byte_binary_json::from_bon8(byte_binary_json::to_bon8(j)) == byte_binary_json({0, 1, 255}));
    }
 #endif
 }
@@ -297,7 +297,6 @@ TEST_CASE("object type without key_compare")
        const auto j = no_key_compare_json::parse(R"({"a":[1,2,3],"b":"x"})");
        CHECK(no_key_compare_json::from_cbor(no_key_compare_json::to_cbor(j)) == j);
        CHECK(no_key_compare_json::from_msgpack(no_key_compare_json::to_msgpack(j)) == j);
        CHECK(no_key_compare_json::from_bon8(no_key_compare_json::to_bon8(j)) == j);
    }
    SECTION("flatten and unflatten")
@@ -1,37 +0,0 @@
 //     __ _____ _____ _____
 //  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
 // |  |  |__   |  |  | | | |  version 3.12.0
 // |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 //
 // SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
 // SPDX-License-Identifier: MIT
 // cmake/test.cmake selects the C++ standard versions with which to build a
 // unit test based on the presence of JSON_HAS_CPP_<VERSION> macros.
 // The regression below only showed on C++17, so build this file for every
 // standard like the other regression tests:
 // JSON_HAS_CPP_17 JSON_HAS_CPP_20 (do not remove; see note at top of file)
 #include "doctest_compatibility.h"
 #include <nlohmann/json.hpp>
 using json = nlohmann::json;
 /////////////////////////////////////////////////////////////////////
 // for #4825 - explicitly instantiating basic_json must compile; this
 // forces instantiation of binary_writer::write_bjdata_ndarray, whose
 // static_cast<string_t> was ambiguous under explicit instantiation on
 // C++17. Merely compiling this translation unit is the regression test.
 //
 // The instantiation compiles every member function, so it has a file of its
 // own: in unit-regression3.cpp it made the object too large for the MinGW
 // linker to relocate (see #5511).
 /////////////////////////////////////////////////////////////////////
 template class nlohmann::basic_json<>;
 TEST_CASE("explicit instantiation of basic_json (#4825)")
 {
    const json j = {1, "two", 3.0};
    CHECK(j.size() == 3);
    CHECK(json::from_bjdata(json::to_bjdata(j)) == j);
 }
@@ -326,15 +326,6 @@ TEST_CASE("ordered_json across binary formats")
        CHECK(collect_keys(restored) == original_keys);
        CHECK(collect_keys(restored["mango"]) == original_mango_keys);
    }
    SECTION("BON8")
    {
        const auto bytes = ordered_json::to_bon8(original);
        const auto restored = ordered_json::from_bon8(bytes);
        CHECK(restored == original);
        CHECK(collect_keys(restored) == original_keys);
        CHECK(collect_keys(restored["mango"]) == original_mango_keys);
    }
 }
 TEST_CASE("alt_json (custom string_t) across binary formats")
@@ -362,13 +353,6 @@ TEST_CASE("alt_json (custom string_t) across binary formats")
        CHECK(restored == original);
    }
    SECTION("BON8")
    {
        const auto bytes = alt_json::to_bon8(original);
        const auto restored = alt_json::from_bon8(bytes);
        CHECK(restored == original);
    }
    SECTION("BSON")
    {
        const auto bytes = alt_json::to_bson(original);
@@ -332,7 +332,6 @@ TEST_CASE("regression tests 2")
        CHECK(float_json::from_cbor(float_json::to_cbor(j)) == j);
        CHECK(float_json::from_msgpack(float_json::to_msgpack(j)) == j);
        CHECK(float_json::from_ubjson(float_json::to_ubjson(j)) == j);
        CHECK(float_json::from_bon8(float_json::to_bon8(j)) == j);
        float_json j2 = {1000.0, 2000.0, 3000.0};
        CHECK(float_json::from_ubjson(float_json::to_ubjson(j2, true, true)) == j2);
@@ -74,7 +74,13 @@ using ordered_json = nlohmann::ordered_json;
    #endif
 #endif
-// the explicit instantiation for #4825 is in unit-explicit_instantiation.cpp
+/////////////////////////////////////////////////////////////////////
 // for #4825 - explicitly instantiating basic_json must compile; this
 // forces instantiation of binary_writer::write_bjdata_ndarray, whose
 // static_cast<string_t> was ambiguous under explicit instantiation on
 // C++17. Merely compiling this translation unit is the regression test.
 /////////////////////////////////////////////////////////////////////
 template class nlohmann::basic_json<>;
 /////////////////////////////////////////////////////////////////////
 // for #4440
@@ -888,7 +894,6 @@ TEST_CASE("regression test #5476 - array type without reserve()")
        // the binary formats pass a definite length to start_array()
        CHECK(deque_json::from_cbor(deque_json::to_cbor(j)) == j);
        CHECK(deque_json::from_msgpack(deque_json::to_msgpack(j)) == j);
        CHECK(deque_json::from_bon8(deque_json::to_bon8(j)) == j);
        // parse() instantiates the callback parser as well, which reserves too
        const auto with_callback = deque_json::parse(R"([1,2,3])", [](int /*depth*/, deque_json::parse_event_t /*event*/, deque_json& /*parsed*/) noexcept
		`@@ -1 +0,0 @@`
			`0x89 0x63 0x6f 0x6d 0x70 0x61 0x63 0x74 0xf9 0x66 0x6f 0x72 0x6d 0x61 0x74 0xff 0x42 0x4f 0x4e 0x38 0xff 0x73 0x63 0x68 0x65 0x6d 0x61 0x90`