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 true and false.

To store objects 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 (bool), the default value for boolean_t is bool.

Storage¶

Boolean values are stored directly inside a basic_json type.

Examples¶

#include <iostream>
#include <iomanip>
#include <nlohmann/json.hpp>

using json = nlohmann::json;

int main()
{
    std::cout << std::boolalpha << std::is_same<bool, json::boolean_t>::value << std::endl;
}

true

Version history¶

• Added in version 1.0.0.