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

nlohmann::basic_json::get_binary

`binary_t& get_binary();

const binary_t& get_binary() const; `

Returns a reference to the stored binary value.

Return value

Reference to binary value.

Exception safety

Strong exception safety: if an exception occurs, the original value stays intact.

Exceptions

Throws type_error.302 if the value is not binary

Complexity

Constant.

Examples

Example

The following code shows how to query a binary value.

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

using json = nlohmann::json;

int main() { // create a binary vector std::vectorstd::uint8_t vec = {0xCA, 0xFE, 0xBA, 0xBE};

// create a binary JSON value with subtype 42
json j = json::binary(vec, 42);

// output type and subtype
std::cout << "type: " << j.type_name() << ", subtype: " << j.get_binary().subtype() << std::endl;

} `

Output:

type: binary, subtype: 42

Version history