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Consolidate documentation (#3071)
* 🔥 consolidate documentation * ♻️ overwork std specializations * 🚚 move images files to mkdocs * ♻️ fix URLs * 🔧 tweak MkDocs configuration * 🔧 add namespaces * 📝 document deprecations * 📝 document documentation generation * 🚸 improve search * 🚸 add examples * 🚧 start adding documentation for macros * 📝 add note for https://github.com/nlohmann/json/issues/874#issuecomment-1001699139 * 📝 overwork example handling * 📝 fix Markdown tables
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@ -1,6 +1,7 @@
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# CBOR
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The Concise Binary Object Representation (CBOR) is a data format whose design goals include the possibility of extremely small code size, fairly small message size, and extensibility without the need for version negotiation.
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The Concise Binary Object Representation (CBOR) is a data format whose design goals include the possibility of extremely
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small code size, fairly small message size, and extensibility without the need for version negotiation.
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!!! abstract "References"
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@ -12,48 +13,48 @@ The Concise Binary Object Representation (CBOR) is a data format whose design go
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The library uses the following mapping from JSON values types to CBOR types according to the CBOR specification (RFC 7049):
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JSON value type | value/range | CBOR type | first byte
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--------------- | ------------------------------------------ | ---------------------------------- | ---------------
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null | `null` | Null | 0xF6
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boolean | `true` | True | 0xF5
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boolean | `false` | False | 0xF4
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number_integer | -9223372036854775808..-2147483649 | Negative integer (8 bytes follow) | 0x3B
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number_integer | -2147483648..-32769 | Negative integer (4 bytes follow) | 0x3A
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number_integer | -32768..-129 | Negative integer (2 bytes follow) | 0x39
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number_integer | -128..-25 | Negative integer (1 byte follow) | 0x38
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number_integer | -24..-1 | Negative integer | 0x20..0x37
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number_integer | 0..23 | Integer | 0x00..0x17
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number_integer | 24..255 | Unsigned integer (1 byte follow) | 0x18
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number_integer | 256..65535 | Unsigned integer (2 bytes follow) | 0x19
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number_integer | 65536..4294967295 | Unsigned integer (4 bytes follow) | 0x1A
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number_integer | 4294967296..18446744073709551615 | Unsigned integer (8 bytes follow) | 0x1B
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number_unsigned | 0..23 | Integer | 0x00..0x17
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number_unsigned | 24..255 | Unsigned integer (1 byte follow) | 0x18
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number_unsigned | 256..65535 | Unsigned integer (2 bytes follow) | 0x19
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number_unsigned | 65536..4294967295 | Unsigned integer (4 bytes follow) | 0x1A
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number_unsigned | 4294967296..18446744073709551615 | Unsigned integer (8 bytes follow) | 0x1B
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number_float | *any value representable by a float* | Single-Precision Float | 0xFA
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number_float | *any value NOT representable by a float* | Double-Precision Float | 0xFB
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string | *length*: 0..23 | UTF-8 string | 0x60..0x77
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string | *length*: 23..255 | UTF-8 string (1 byte follow) | 0x78
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string | *length*: 256..65535 | UTF-8 string (2 bytes follow) | 0x79
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string | *length*: 65536..4294967295 | UTF-8 string (4 bytes follow) | 0x7A
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string | *length*: 4294967296..18446744073709551615 | UTF-8 string (8 bytes follow) | 0x7B
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array | *size*: 0..23 | array | 0x80..0x97
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array | *size*: 23..255 | array (1 byte follow) | 0x98
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array | *size*: 256..65535 | array (2 bytes follow) | 0x99
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array | *size*: 65536..4294967295 | array (4 bytes follow) | 0x9A
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array | *size*: 4294967296..18446744073709551615 | array (8 bytes follow) | 0x9B
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object | *size*: 0..23 | map | 0xA0..0xB7
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object | *size*: 23..255 | map (1 byte follow) | 0xB8
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object | *size*: 256..65535 | map (2 bytes follow) | 0xB9
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object | *size*: 65536..4294967295 | map (4 bytes follow) | 0xBA
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object | *size*: 4294967296..18446744073709551615 | map (8 bytes follow) | 0xBB
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binary | *size*: 0..23 | byte string | 0x40..0x57
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binary | *size*: 23..255 | byte string (1 byte follow) | 0x58
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binary | *size*: 256..65535 | byte string (2 bytes follow) | 0x59
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binary | *size*: 65536..4294967295 | byte string (4 bytes follow) | 0x5A
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binary | *size*: 4294967296..18446744073709551615 | byte string (8 bytes follow) | 0x5B
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| JSON value type | value/range | CBOR type | first byte |
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|-----------------|--------------------------------------------|-----------------------------------|------------|
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| null | `null` | Null | 0xF6 |
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| boolean | `true` | True | 0xF5 |
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| boolean | `false` | False | 0xF4 |
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| number_integer | -9223372036854775808..-2147483649 | Negative integer (8 bytes follow) | 0x3B |
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| number_integer | -2147483648..-32769 | Negative integer (4 bytes follow) | 0x3A |
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| number_integer | -32768..-129 | Negative integer (2 bytes follow) | 0x39 |
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| number_integer | -128..-25 | Negative integer (1 byte follow) | 0x38 |
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| number_integer | -24..-1 | Negative integer | 0x20..0x37 |
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| number_integer | 0..23 | Integer | 0x00..0x17 |
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| number_integer | 24..255 | Unsigned integer (1 byte follow) | 0x18 |
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| number_integer | 256..65535 | Unsigned integer (2 bytes follow) | 0x19 |
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| number_integer | 65536..4294967295 | Unsigned integer (4 bytes follow) | 0x1A |
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| number_integer | 4294967296..18446744073709551615 | Unsigned integer (8 bytes follow) | 0x1B |
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| number_unsigned | 0..23 | Integer | 0x00..0x17 |
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| number_unsigned | 24..255 | Unsigned integer (1 byte follow) | 0x18 |
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| number_unsigned | 256..65535 | Unsigned integer (2 bytes follow) | 0x19 |
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| number_unsigned | 65536..4294967295 | Unsigned integer (4 bytes follow) | 0x1A |
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| number_unsigned | 4294967296..18446744073709551615 | Unsigned integer (8 bytes follow) | 0x1B |
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| number_float | *any value representable by a float* | Single-Precision Float | 0xFA |
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| number_float | *any value NOT representable by a float* | Double-Precision Float | 0xFB |
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| string | *length*: 0..23 | UTF-8 string | 0x60..0x77 |
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| string | *length*: 23..255 | UTF-8 string (1 byte follow) | 0x78 |
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| string | *length*: 256..65535 | UTF-8 string (2 bytes follow) | 0x79 |
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| string | *length*: 65536..4294967295 | UTF-8 string (4 bytes follow) | 0x7A |
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| string | *length*: 4294967296..18446744073709551615 | UTF-8 string (8 bytes follow) | 0x7B |
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| array | *size*: 0..23 | array | 0x80..0x97 |
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| array | *size*: 23..255 | array (1 byte follow) | 0x98 |
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| array | *size*: 256..65535 | array (2 bytes follow) | 0x99 |
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| array | *size*: 65536..4294967295 | array (4 bytes follow) | 0x9A |
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| array | *size*: 4294967296..18446744073709551615 | array (8 bytes follow) | 0x9B |
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| object | *size*: 0..23 | map | 0xA0..0xB7 |
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| object | *size*: 23..255 | map (1 byte follow) | 0xB8 |
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| object | *size*: 256..65535 | map (2 bytes follow) | 0xB9 |
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| object | *size*: 65536..4294967295 | map (4 bytes follow) | 0xBA |
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| object | *size*: 4294967296..18446744073709551615 | map (8 bytes follow) | 0xBB |
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| binary | *size*: 0..23 | byte string | 0x40..0x57 |
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| binary | *size*: 23..255 | byte string (1 byte follow) | 0x58 |
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| binary | *size*: 256..65535 | byte string (2 bytes follow) | 0x59 |
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| binary | *size*: 65536..4294967295 | byte string (4 bytes follow) | 0x5A |
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| binary | *size*: 4294967296..18446744073709551615 | byte string (8 bytes follow) | 0x5B |
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Binary values with subtype are mapped to tagged values (0xD8..0xDB) depending on the subtype, followed by a byte string,
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see "binary" cells in the table above.
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@ -104,47 +105,47 @@ see "binary" cells in the table above.
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The library maps CBOR types to JSON value types as follows:
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CBOR type | JSON value type | first byte
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---------------------- | --------------- | ----------
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Integer | number_unsigned | 0x00..0x17
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Unsigned integer | number_unsigned | 0x18
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Unsigned integer | number_unsigned | 0x19
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Unsigned integer | number_unsigned | 0x1A
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Unsigned integer | number_unsigned | 0x1B
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Negative integer | number_integer | 0x20..0x37
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Negative integer | number_integer | 0x38
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Negative integer | number_integer | 0x39
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Negative integer | number_integer | 0x3A
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Negative integer | number_integer | 0x3B
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Byte string | binary | 0x40..0x57
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Byte string | binary | 0x58
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Byte string | binary | 0x59
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Byte string | binary | 0x5A
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Byte string | binary | 0x5B
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UTF-8 string | string | 0x60..0x77
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UTF-8 string | string | 0x78
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UTF-8 string | string | 0x79
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UTF-8 string | string | 0x7A
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UTF-8 string | string | 0x7B
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UTF-8 string | string | 0x7F
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array | array | 0x80..0x97
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array | array | 0x98
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array | array | 0x99
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array | array | 0x9A
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array | array | 0x9B
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array | array | 0x9F
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map | object | 0xA0..0xB7
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map | object | 0xB8
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map | object | 0xB9
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map | object | 0xBA
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map | object | 0xBB
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map | object | 0xBF
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False | `false` | 0xF4
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True | `true` | 0xF5
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Null | `null` | 0xF6
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Half-Precision Float | number_float | 0xF9
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Single-Precision Float | number_float | 0xFA
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Double-Precision Float | number_float | 0xFB
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| CBOR type | JSON value type | first byte |
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|------------------------|-----------------|------------|
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| Integer | number_unsigned | 0x00..0x17 |
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| Unsigned integer | number_unsigned | 0x18 |
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| Unsigned integer | number_unsigned | 0x19 |
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| Unsigned integer | number_unsigned | 0x1A |
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| Unsigned integer | number_unsigned | 0x1B |
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| Negative integer | number_integer | 0x20..0x37 |
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| Negative integer | number_integer | 0x38 |
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| Negative integer | number_integer | 0x39 |
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| Negative integer | number_integer | 0x3A |
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| Negative integer | number_integer | 0x3B |
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| Byte string | binary | 0x40..0x57 |
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| Byte string | binary | 0x58 |
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| Byte string | binary | 0x59 |
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| Byte string | binary | 0x5A |
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| Byte string | binary | 0x5B |
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| UTF-8 string | string | 0x60..0x77 |
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| UTF-8 string | string | 0x78 |
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| UTF-8 string | string | 0x79 |
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| UTF-8 string | string | 0x7A |
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| UTF-8 string | string | 0x7B |
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| UTF-8 string | string | 0x7F |
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| array | array | 0x80..0x97 |
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| array | array | 0x98 |
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| array | array | 0x99 |
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| array | array | 0x9A |
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| array | array | 0x9B |
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| array | array | 0x9F |
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| map | object | 0xA0..0xB7 |
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| map | object | 0xB8 |
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| map | object | 0xB9 |
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| map | object | 0xBA |
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| map | object | 0xBB |
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| map | object | 0xBF |
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| False | `false` | 0xF4 |
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| True | `true` | 0xF5 |
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| Null | `null` | 0xF6 |
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| Half-Precision Float | number_float | 0xF9 |
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| Single-Precision Float | number_float | 0xFA |
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| Double-Precision Float | number_float | 0xFB |
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!!! warning "Incomplete mapping"
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Reference in New Issue
Block a user