std::forward_list::front

 

C++

Language

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Utilities library

Strings library

Containers library

Algorithms library

Iterators library

Numerics library

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Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

 

Containers library

array (C++11)

vector

deque

forward_list (C++11)

list

set

multiset

map

multimap

unordered_set (C++11)

unordered_multiset (C++11)

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unordered_multimap (C++11)

stack

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std::forward_list

Member functions

forward_list::forward_list

forward_list::~forward_list

forward_list::operator=

forward_list::assign

forward_list::get_allocator

Element access

forward_list::front

Iterators

forward_list::before_begin forward_list::cbefore_begin

forward_list::begin forward_list::cbegin

forward_list::end forward_list::cend

Capacity

forward_list::empty

forward_list::max_size

Modifiers

forward_list::clear

forward_list::insert_after

forward_list::emplace_after

forward_list::erase_after

forward_list::push_front

forward_list::emplace_front

forward_list::pop_front

forward_list::resize

forward_list::swap

Operations

forward_list::merge

forward_list::splice_after

forward_list::remove forward_list::remove_if

forward_list::reverse

forward_list::unique

forward_list::sort

 

reference front();		(since C++11)
const_reference front() const;		(since C++11)

Returns a reference to the first element in the container.

Parameters

(none)

Return value

reference to the first element

Complexity

Constant

Example

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

#include <forward_list>
#include <iostream>
 
int main()
{
    std::forward_list<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