json/docs/mkdocs/docs/api/basic_json/boolean_t.md

nlohmann::basic_json::boolean_t

using boolean_t = BooleanType;

The type used to store JSON booleans.

RFC 8259 implicitly describes a boolean as a type which differentiates the two literals #!json true and #!json false.

To store boolean values in C++, a type is defined by the template parameter BooleanType which chooses the type to use.

Notes

Default type

With the default values for BooleanType (#!cpp bool), the default value for boolean_t is #!cpp bool.

Storage

Boolean values are stored directly inside a basic_json type.

Examples

??? example

The following code shows that `boolean_t` is by default, a typedef to `#!cpp bool`.
 
```cpp
--8<-- "examples/boolean_t.cpp"
```

Output:

```json
--8<-- "examples/boolean_t.output"
```

Version history

• Added in version 1.0.0.