template<template< typename U, typename V, typename...Args > class ObjectType = std::map, template< typename U, typename...Args > class ArrayType = std::vector, class StringType = std::string, class BooleanType = bool, class NumberIntegerType = int64_t, class NumberFloatType = double, template< typename U > class AllocatorType = std::allocator>

nlohmann::basic_json::basic_json ( const int  value )

inline

Create an integer number JSON value with a given content.

Parameters

[in]

value

an integer to create a JSON number from

Note

This constructor allows to pass enums directly to a constructor. As C++ has no way of specifying the type of an anonymous enum explicitly, we can only rely on the fact that such values implicitly convert to int. As int may already be the same type of number_integer_t, we may need to switch off the constructor basic_json(const number_integer_t).

Complexity

Constant.

Example

The example below shows the construction of a JSON integer number value from an anonymous enum.

#include <json.hpp>

using namespace nlohmann;

int main()
{
    // an anonymous enum
    enum { t = 17 };

    // create a JSON number from the enum
    json j(t);

    // serialize the JSON numbers
    std::cout << j << '\n';
}

Output:

17

The example code above can be translated with

g++ -std=c++11 -Isrc doc/examples/basic_json__const_int.cpp -o basic_json__const_int 

.

See also

basic_json(const number_integer_t)