JSON for Modern C++  3.7.0

◆ insert() [3/6]

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>
iterator nlohmann::basic_json::insert ( const_iterator  pos,
size_type  cnt,
const basic_json val 
)
inline

Inserts cnt copies of val before iterator pos.

Parameters
[in]positerator before which the content will be inserted; may be the end() iterator
[in]cntnumber of copies of val to insert
[in]valelement to insert
Returns
iterator pointing to the first element inserted, or pos if cnt==0
Exceptions
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"
Complexity
Linear in cnt plus linear in the distance between pos and end of the container.
Example
The example shows how insert() is used.
1 #include <iostream>
2 #include <nlohmann/json.hpp>
3 
4 using json = nlohmann::json;
5 
6 int main()
7 {
8  // create a JSON array
9  json v = {1, 2, 3, 4};
10 
11  // insert number 7 copies of number 7 before number 3
12  auto new_pos = v.insert(v.begin() + 2, 7, 7);
13 
14  // output new array and result of insert call
15  std::cout << *new_pos << '\n';
16  std::cout << v << '\n';
17 }
basic_json<> json
default JSON class
Definition: json.hpp:2355

Output (play with this example online):
7
[1,2,7,7,7,7,7,7,7,3,4]
The example code above can be translated with
g++ -std=c++11 -Isingle_include doc/examples/insert__count.cpp -o insert__count 
Since
version 1.0.0

Definition at line 19594 of file json.hpp.