- JSON for Modern C++ (original) (raw)

std::swap<basic_json>¶

namespace std { void swap(nlohmann::basic_json& j1, nlohmann::basic_json& j2); }

Exchanges the values of two JSON objects.

Parameters¶

j1 (in, out)

value to be replaced by j2

j2 (in, out)

value to be replaced by j1

Possible implementation¶

void swap(nlohmann::basic_json& j1, nlohmann::basic_json& j2) { j1.swap(j2); }

Examples¶

Example

The following code shows how two values are swapped with std::swap.

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

using json = nlohmann::json;

int main() { // create JSON values json j1 = {{"one", 1}, {"two", 2}}; json j2 = {1, 2, 4, 8, 16};

std::cout << "j1 = " << j1 << " | j2 = " << j2 << '\n';

// swap values
std::swap(j1, j2);

std::cout << "j1 = " << j1 << " | j2 = " << j2 << std::endl;

} `

Output:

j1 = {"one":1,"two":2} | j2 = [1,2,4,8,16] j1 = [1,2,4,8,16] | j2 = {"one":1,"two":2}

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