std::dynarray::operator[]

 

C++

Language

Standard library headers

Concepts

Utilities library

Strings library

Containers library

Algorithms library

Iterators library

Numerics library

Input/output library

Localizations library

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

Technical Specifications

 

Containers library

array (C++11)

vector

deque

forward_list (C++11)

list

set

multiset

map

multimap

unordered_set (C++11)

unordered_multiset (C++11)

unordered_map (C++11)

unordered_multimap (C++11)

stack

queue

priority_queue

 

std::dynarray

Member functions

dynarray::dynarray

dynarray::~dynarray

Element access

dynarray::at

dynarray::operator[]

dynarray::front

dynarray::back

dynarray::data

Iterators

dynarray::begindynarray::cbegin

dynarray::enddynarray::cend

dynarray::rbegindynarray::crbegin

dynarray::renddynarray::crend

Capacity

dynarray::empty

dynarray::size

dynarray::max_size

Modifiers

dynarray::fill

 

reference       operator[]( size_type pos );		(since {std})
const_reference operator[]( size_type pos ) const;		(since {std})

Returns a reference to the element at specified location pos. No bounds checking is performed.

Parameters

pos

-

position of the element to return

Return value

Reference to the requested element.

Complexity

Constant.

Notes

Unlike std::map::operator[], this operator never inserts a new element into the container.

Example

The following code uses operator[] to read from and write to a std::dynarray<int>:

Run this code

#include <dynarray>
#include <iostream>
 
int main()
{
    std::dynarray<int> numbers {2, 4, 6, 8};
 
    std::cout << "Second element: " << numbers[1] << '\n';
 
    numbers[0] = 5;
 
    std::cout << "All numbers:";
    for (auto i : numbers) {
        std::cout << ' ' << i;
    }
    std::cout << '\n';
}

Output:

Second element: 4
All numbers: 5 4 6 8

See also

at	access specified element with bounds checking (public member function)