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nlohmann
2026-10-03 05:43:12 +00:00
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## Notes
#### Default type
### Default type
With the default values for `NumberIntegerType` (`std::int64_t`), the default value for `number_integer_t` is
`#!cpp std::int64_t`.
#### Default behavior
### Default behavior
- The restrictions about leading zeros are not enforced in C++. Instead, leading zeros in integer literals lead to an
interpretation as an octal number. Internally, the value will be stored as a decimal number. For instance, the C++
integer literal `010` will be serialized to `8`. During deserialization, leading zeros yield an error.
#### Limits
### Limits
[RFC 8259](https://tools.ietf.org/html/rfc8259) specifies:
> An implementation may set limits on the range and precision of numbers.
@@ -57,7 +57,7 @@ will automatically be stored as [`number_unsigned_t`](number_unsigned_t.md) or [
As this range is a subrange of the exactly supported range [INT64_MIN, INT64_MAX], this class's integer type is
interoperable.
#### Storage
### Storage
Integer number values are stored directly inside a `basic_json` type.
@@ -77,6 +77,13 @@ Integer number values are stored directly inside a `basic_json` type.
--8<-- "examples/number_integer_t.output"
```
## See also
- [number_unsigned_t](number_unsigned_t.md) the type used to store JSON unsigned integer numbers
- [number_float_t](number_float_t.md) the type used to store JSON floating-point numbers
- [is_number_integer](is_number_integer.md) checks whether the JSON value is a signed integer number
- [Number Handling](../../features/types/number_handling.md) - the article on number handling
## Version history
- Added in version 1.0.0.