JSON for Modern C++  3.7.0

◆ insert() [6/6]

template<template< typename U, typename V, typename... Args > class ObjectType = std::map, template< typename U, typename... Args > class ArrayType = std::vector, class StringType = std::string, class BooleanType = bool, class NumberIntegerType = std::int64_t, class NumberUnsignedType = std::uint64_t, class NumberFloatType = double, template< typename U > class AllocatorType = std::allocator, template< typename T, typename SFINAE=void > class JSONSerializer = adl_serializer>
void nlohmann::basic_json::insert ( const_iterator  first,
const_iterator  last 

Inserts elements from range [first, last).

[in]firstbegin of the range of elements to insert
[in]lastend of the range of elements to insert
type_error.309if called on JSON values other than objects; example: "cannot use insert() with string"
invalid_iterator.202if iterator first or last does does not point to an object; example: "iterators first and last must point to objects"
invalid_iterator.210if first and last do not belong to the same JSON value; example: "iterators do not fit"
Logarithmic: O(N*log(size() + N)), where N is the number of elements to insert.
The example shows how insert() is used.
1 #include <iostream>
2 #include <nlohmann/json.hpp>
4 using json = nlohmann::json;
6 int main()
7 {
8  // create two JSON objects
9  json j1 = {{"one", "eins"}, {"two", "zwei"}};
10  json j2 = {{"eleven", "elf"}, {"seventeen", "siebzehn"}};
12  // output objects
13  std::cout << j1 << '\n';
14  std::cout << j2 << '\n';
16  // insert range from j2 to j1
17  j1.insert(j2.begin(), j2.end());
19  // output result of insert call
20  std::cout << j1 << '\n';
21 }
basic_json<> json
default JSON class
Definition: json.hpp:2355

Output (play with this example online):
The example code above can be translated with
g++ -std=c++11 -Isingle_include doc/examples/insert__range_object.cpp -o insert__range_object 
version 3.0.0

Definition at line 19736 of file json.hpp.