Initial commit

lib/json/docs/examples/swap__binary_t.cpp

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+#include <iostream>
+#include <nlohmann/json.hpp>
+
+using json = nlohmann::json;
+
+int main()
+{
+    // create a binary value
+    json value = json::binary({1, 2, 3});
+
+    // create a binary_t
+    json::binary_t binary = {{4, 5, 6}};
+
+    // swap the object stored in the JSON value
+    value.swap(binary);
+
+    // output the values
+    std::cout << "value = " << value << '\n';
+    std::cout << "binary = " << json(binary) << '\n';
+}