std::dynarray::front

 

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 front();		(since {std})
const_reference front() const;		(since {std})

Returns a reference to the first element in the container.

Calling front on an empty container is undefined.

Parameters

(none)

Return value

reference to the first element

Complexity

Constant

Notes

For a container c, the expression c.front() is equivalent to *c.begin().

Example

The following code uses front to display the first element of a std::dynarray<char>:

Run this code

#include <dynarray>
#include <iostream>
 
int main()
{
    std::dynarray<char> letters {'o', 'm', 'g', 'w', 't', 'f'};
 
    if (!letters.empty()) {
        std::cout << "The first character is: " << letters.front() << '\n';
    }  
}

Output:

The first character is o

See also

back	access the last element (public member function)