This commit is contained in:
nlohmann
2026-10-05 05:14:25 +00:00
parent c51ca275d0
commit f99a460b9b
18 changed files with 317 additions and 307 deletions
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@@ -55,6 +55,10 @@ This implementation does exactly follow this approach, as it uses double precisi
smaller than `-1.79769313486232e+308` and values greater than `1.79769313486232e+308` will be stored as NaN internally
and be serialized to `null`.
During deserialization (from JSON text or any of the binary formats), a finite number that does not fit into
`number_float_t` is rejected with [`out_of_range.406`](../../home/exceptions.md#jsonexceptionout_of_range406), for
example a double-precision number in a binary format when `number_float_t` is `#!cpp float`.
### Storage
Floating-point number values are stored directly inside a `basic_json` type.
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@@ -37,6 +37,8 @@ With the default values for `NumberFloatType` (`double`), the default value for
This implementation does exactly follow this approach, as it uses double precision floating-point numbers. Note values smaller than `-1.79769313486232e+308` and values greater than `1.79769313486232e+308` will be stored as NaN internally and be serialized to `null`.
During deserialization (from JSON text or any of the binary formats), a finite number that does not fit into `number_float_t` is rejected with [`out_of_range.406`](https://json.nlohmann.me/home/exceptions/#jsonexceptionout_of_range406), for example a double-precision number in a binary format when `number_float_t` is `float`.
### Storage
Floating-point number values are stored directly inside a `basic_json` type.
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@@ -47,8 +47,9 @@ With the default values for `NumberIntegerType` (`std::int64_t`), the default va
When the default type is used, the maximal integer number that can be stored is `9223372036854775807` (INT64_MAX) and
the minimal integer number that can be stored is `-9223372036854775808` (INT64_MIN). Integer numbers that are out of
range will yield over/underflow when used in a constructor. During deserialization, too large or small integer numbers
will automatically be stored as [`number_unsigned_t`](number_unsigned_t.md) or [`number_float_t`](number_float_t.md).
range will yield over/underflow when used in a constructor. During deserialization (from JSON text or any of the binary
formats), too large or small integer numbers will automatically be stored as [`number_unsigned_t`](number_unsigned_t.md)
or [`number_float_t`](number_float_t.md).
[RFC 8259](https://tools.ietf.org/html/rfc8259) further states:
> Note that when such software is used, numbers that are integers and are in the range [-2<sup>53</sup>+1, 2<sup>53</sup>-1] are
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@@ -34,7 +34,7 @@ With the default values for `NumberIntegerType` (`std::int64_t`), the default va
> An implementation may set limits on the range and precision of numbers.
When the default type is used, the maximal integer number that can be stored is `9223372036854775807` (INT64_MAX) and the minimal integer number that can be stored is `-9223372036854775808` (INT64_MIN). Integer numbers that are out of range will yield over/underflow when used in a constructor. During deserialization, too large or small integer numbers will automatically be stored as [`number_unsigned_t`](https://json.nlohmann.me/api/basic_json/number_unsigned_t/index.md) or [`number_float_t`](https://json.nlohmann.me/api/basic_json/number_float_t/index.md).
When the default type is used, the maximal integer number that can be stored is `9223372036854775807` (INT64_MAX) and the minimal integer number that can be stored is `-9223372036854775808` (INT64_MIN). Integer numbers that are out of range will yield over/underflow when used in a constructor. During deserialization (from JSON text or any of the binary formats), too large or small integer numbers will automatically be stored as [`number_unsigned_t`](https://json.nlohmann.me/api/basic_json/number_unsigned_t/index.md) or [`number_float_t`](https://json.nlohmann.me/api/basic_json/number_float_t/index.md).
[RFC 8259](https://tools.ietf.org/html/rfc8259) further states:
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@@ -48,8 +48,9 @@ With the default values for `NumberUnsignedType` (`std::uint64_t`), the default
When the default type is used, the maximal integer number that can be stored is `18446744073709551615` (UINT64_MAX) and
the minimal integer number that can be stored is `0`. Integer numbers that are out of range will yield over/underflow
when used in a constructor. During deserialization, too large or small integer numbers will automatically be stored
as [`number_integer_t`](number_integer_t.md) or [`number_float_t`](number_float_t.md).
when used in a constructor. During deserialization (from JSON text or any of the binary formats), too large or small
integer numbers will automatically be stored as [`number_integer_t`](number_integer_t.md) or
[`number_float_t`](number_float_t.md).
[RFC 8259](https://tools.ietf.org/html/rfc8259) further states:
> Note that when such software is used, numbers that are integers and are in the range [-2<sup>53</sup>+1, 2<sup>53</sup>-1] are
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@@ -34,7 +34,7 @@ With the default values for `NumberUnsignedType` (`std::uint64_t`), the default
> An implementation may set limits on the range and precision of numbers.
When the default type is used, the maximal integer number that can be stored is `18446744073709551615` (UINT64_MAX) and the minimal integer number that can be stored is `0`. Integer numbers that are out of range will yield over/underflow when used in a constructor. During deserialization, too large or small integer numbers will automatically be stored as [`number_integer_t`](https://json.nlohmann.me/api/basic_json/number_integer_t/index.md) or [`number_float_t`](https://json.nlohmann.me/api/basic_json/number_float_t/index.md).
When the default type is used, the maximal integer number that can be stored is `18446744073709551615` (UINT64_MAX) and the minimal integer number that can be stored is `0`. Integer numbers that are out of range will yield over/underflow when used in a constructor. During deserialization (from JSON text or any of the binary formats), too large or small integer numbers will automatically be stored as [`number_integer_t`](https://json.nlohmann.me/api/basic_json/number_integer_t/index.md) or [`number_float_t`](https://json.nlohmann.me/api/basic_json/number_float_t/index.md).
[RFC 8259](https://tools.ietf.org/html/rfc8259) further states:
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@@ -168,9 +168,9 @@ The library maps CBOR types to JSON value types as follows:
!!! warning "Negative integer overflow"
CBOR negative integers (major type 1) are decoded as `-1 - n`. If the encoded magnitude `n` is too large for the
result to fit into `number_integer_t` (`std::int64_t` by default), parsing fails with a
[`parse_error.112`](../../home/exceptions.md#jsonexceptionparse_error112) exception rather than overflowing
silently.
result to fit into `number_integer_t` (`std::int64_t` by default), the result is stored as `number_float_t`, like
a too small integer in JSON text. For example, `-18446744073709551616` (`0x3B` followed by eight `0xFF` bytes) is
stored as `-1.8446744073709552e+19`.
!!! warning "Object keys"
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@@ -181,7 +181,7 @@ Tagged items (0xC0..0xDB) are not interpreted either; see the note on tagged ite
Negative integer overflow
CBOR negative integers (major type 1) are decoded as `-1 - n`. If the encoded magnitude `n` is too large for the result to fit into `number_integer_t` (`std::int64_t` by default), parsing fails with a [`parse_error.112`](https://json.nlohmann.me/home/exceptions/#jsonexceptionparse_error112) exception rather than overflowing silently.
CBOR negative integers (major type 1) are decoded as `-1 - n`. If the encoded magnitude `n` is too large for the result to fit into `number_integer_t` (`std::int64_t` by default), the result is stored as `number_float_t`, like a too small integer in JSON text. For example, `-18446744073709551616` (`0x3B` followed by eight `0xFF` bytes) is stored as `-1.8446744073709552e+19`.
Object keys
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@@ -331,9 +331,6 @@ An unexpected byte was read in a [binary format](../features/binary_formats/inde
[json.exception.parse_error.112] parse error at byte 15: syntax error while parsing BSON binary: byte array length cannot be negative, is -1
```
```
[json.exception.parse_error.112] parse error at byte 9: syntax error while parsing CBOR value: negative integer overflow
```
```
[json.exception.parse_error.112] parse error at byte 5: syntax error while parsing BSON document: document size 6 does not match the number of bytes read (5)
```
@@ -863,13 +860,18 @@ The JSON Patch operations 'remove' and 'add' cannot be applied to the root eleme
### json.exception.out_of_range.406
A parsed number could not be stored as without changing it to NaN or INF.
A parsed number could not be stored without changing it to NaN or INF. For the binary formats, this happens when a
finite floating-point number does not fit into [`number_float_t`](../api/basic_json/number_float_t.md), for example a
double-precision number when `number_float_t` is `#!cpp float`.
!!! failure "Example message"
!!! failure "Example messages"
```
number overflow parsing '10E1000'
```
```
[json.exception.out_of_range.406] syntax error while parsing CBOR value: number overflow
```
### json.exception.out_of_range.407
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@@ -395,10 +395,6 @@ Example messages
[json.exception.parse_error.112] parse error at byte 15: syntax error while parsing BSON binary: byte array length cannot be negative, is -1
```
```
[json.exception.parse_error.112] parse error at byte 9: syntax error while parsing CBOR value: negative integer overflow
```
```
[json.exception.parse_error.112] parse error at byte 5: syntax error while parsing BSON document: document size 6 does not match the number of bytes read (5)
```
@@ -993,14 +989,18 @@ JSON pointer has no parent
### json.exception.out_of_range.406
A parsed number could not be stored as without changing it to NaN or INF.
A parsed number could not be stored without changing it to NaN or INF. For the binary formats, this happens when a finite floating-point number does not fit into [`number_float_t`](https://json.nlohmann.me/api/basic_json/number_float_t/index.md), for example a double-precision number when `number_float_t` is `float`.
Example message
Example messages
```
number overflow parsing '10E1000'
```
```
[json.exception.out_of_range.406] syntax error while parsing CBOR value: number overflow
```
### json.exception.out_of_range.407
This exception previously indicated that the UBJSON and BSON binary formats did not support integer numbers greater than 9223372036854775807 due to limitations in the implemented mapping. However, these limitations have since been resolved, and this exception no longer occurs.
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