nlohmann::basic_json::begin¶

iteratorbegin()noexcept;
const_iteratorbegin()constnoexcept;

Returns an iterator to the first element.

Illustration from cppreference.com

Return value¶

iterator to the first element

Exception safety¶

No-throw guarantee: this member function never throws exceptions.

Complexity¶

Constant.

Examples¶

#include<iostream>
#include<nlohmann/json.hpp>
usingjson=nlohmann::json;
intmain()
{
// create an array value
jsonarray={1,2,3,4,5};
// get an iterator to the first element
json::iteratorit=array.begin();
// serialize the element that the iterator points to
std::cout<<*it<<'\n';
}

1

Version history¶

• Added in version 1.0.0.