json/doc/examples/basic_json__nullptr_t.cpp

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

using json = nlohmann::json;

int main()
{
    // implicitly create a JSON null value
    json j1;

    // explicitly create a JSON null value
    json j2(nullptr);

    // serialize the JSON null value
    std::cout << j1 << '\n' << j2 << '\n';
}
:memo: cleanup after #650 As <iostream> is not included in json.hpp any more, all code examples need to include <iostream> now. 2017-07-09 09:51:38 +00:00			`#include <iostream>`
:bookmark: set version to 3.1.0 - updated documentation wrt. new repository layout - temporarily switched off Homebrew --HEAD building (can only be switched on after release) - set copyright date to 2018 2018-02-01 21:20:26 +00:00			`#include <nlohmann/json.hpp>`
overworked doxygen 2015-06-20 22:59:33 +00:00
removed "using namespace" from examples 2016-01-30 19:23:14 +00:00			`using json = nlohmann::json;`
overworked doxygen 2015-06-20 22:59:33 +00:00
			`int main()`
			`{`
interface cleanup 2016-08-31 15:07:35 +00:00			`// implicitly create a JSON null value`
			`json j1;`

			`// explicitly create a JSON null value`
			`json j2(nullptr);`
overworked doxygen 2015-06-20 22:59:33 +00:00
			`// serialize the JSON null value`
interface cleanup 2016-08-31 15:07:35 +00:00			`std::cout << j1 << '\n' << j2 << '\n';`
overworked doxygen 2015-06-20 22:59:33 +00:00			`}`