JSON for Modern C++ 3.10.4

◆ insert() [4/6]

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, class BinaryType = std::vector<std::uint8_t>>
iterator nlohmann::basic_json< ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer, BinaryType >::insert ( const_iterator  pos,
const_iterator  first,
const_iterator  last 

Inserts elements from range [first, last) before iterator pos.

[in]positerator before which the content will be inserted; may be the end() iterator
[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 arrays; example: "cannot use insert() with string"
invalid_iterator.202if pos is not an iterator of *this; example: "iterator does not fit current value"
invalid_iterator.210if first and last do not belong to the same JSON value; example: "iterators do not fit"
invalid_iterator.211if first or last are iterators into container for which insert is called; example: "passed iterators may not belong to container"
iterator pointing to the first element inserted, or pos if first==last
Linear in std::distance(first, last) plus linear in the distance between pos and end of the container.
The example shows how insert() is used.
1#include <iostream>
2#include <nlohmann/json.hpp>
4using json = nlohmann::json;
6int main()
8 // create a JSON array
9 json v = {1, 2, 3, 4};
11 // create a JSON array to copy values from
12 json v2 = {"one", "two", "three", "four"};
14 // insert range from v2 before the end of array v
15 auto new_pos = v.insert(v.end(), v2.begin(), v2.end());
17 // output new array and result of insert call
18 std::cout << *new_pos << '\n';
19 std::cout << v << '\n';
basic_json<> json
default JSON class
Definition: json.hpp:3472

Output (play with this example online):
The example code above can be translated with
g++ -std=c++11 -Isingle_include doc/examples/insert__range.cpp -o insert__range 
version 1.0.0

Definition at line 23375 of file json.hpp.