WhisperCom/doc/examples/json_pointer__back.cpp

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#include <iostream>
#include <nlohmann/json.hpp>
using json = nlohmann::json;
int main()
{
// different JSON Pointers
json::json_pointer ptr1("/foo");
json::json_pointer ptr2("/foo/0");
// call empty()
std::cout << "last reference token of " << ptr1 << " is " << ptr1.back() << '\n'
<< "last reference token of " << ptr2 << " is " << ptr2.back() << std::endl;
}