std::list<T,Allocator>::front (3) - Linux Manuals
std::list<T,Allocator>::front: std::list<T,Allocator>::front
Command to display std::list<T,Allocator>::front
manual in Linux: $ man 3 std::list<T,Allocator>::front
NAME
std::list<T,Allocator>::front - std::list<T,Allocator>::front
Synopsis
reference front();
const_reference front() const;
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::list<char>:
// Run this code
#include <list>
#include <iostream>
int main()
{
std::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
See also
access the last element
back (public member function)
Pages related to std::list<T,Allocator>::front
- std::list<T,Allocator>::assign (3) - std::list<T,Allocator>::assign
- std::list<T,Allocator>::back (3) - std::list<T,Allocator>::back
- std::list<T,Allocator>::begin,std::list<T,Allocator>::cbegin (3) - std::list<T,Allocator>::begin,std::list<T,Allocator>::cbegin
- std::list<T,Allocator>::clear (3) - std::list<T,Allocator>::clear
- std::list<T,Allocator>::emplace (3) - std::list<T,Allocator>::emplace
- std::list<T,Allocator>::emplace_back (3) - std::list<T,Allocator>::emplace_back
- std::list<T,Allocator>::emplace_front (3) - std::list<T,Allocator>::emplace_front
- std::list<T,Allocator>::empty (3) - std::list<T,Allocator>::empty
- std::list<T,Allocator>::end,std::list<T,Allocator>::cend (3) - std::list<T,Allocator>::end,std::list<T,Allocator>::cend
- std::list<T,Allocator>::erase (3) - std::list<T,Allocator>::erase
- std::list<T,Allocator>::get_allocator (3) - std::list<T,Allocator>::get_allocator
- std::list<T,Allocator>::insert (3) - std::list<T,Allocator>::insert
- std::list<T,Allocator>::list (3) - std::list<T,Allocator>::list
- std::list<T,Allocator>::max_size (3) - std::list<T,Allocator>::max_size
- std::list<T,Allocator>::merge (3) - std::list<T,Allocator>::merge
- std::list<T,Allocator>::operator= (3) - std::list<T,Allocator>::operator=
- std::list<T,Allocator>::pop_back (3) - std::list<T,Allocator>::pop_back
- std::list<T,Allocator>::pop_front (3) - std::list<T,Allocator>::pop_front
- std::list<T,Allocator>::push_back (3) - std::list<T,Allocator>::push_back
- std::list<T,Allocator>::push_front (3) - std::list<T,Allocator>::push_front
- std::list<T,Allocator>::rbegin,std::list<T,Allocator>::crbegin (3) - std::list<T,Allocator>::rbegin,std::list<T,Allocator>::crbegin
- std::list<T,Allocator>::remove,remove_if (3) - std::list<T,Allocator>::remove,remove_if
- std::list<T,Allocator>::rend,std::list<T,Allocator>::crend (3) - std::list<T,Allocator>::rend,std::list<T,Allocator>::crend
- std::list<T,Allocator>::resize (3) - std::list<T,Allocator>::resize
- std::list<T,Allocator>::reverse (3) - std::list<T,Allocator>::reverse
- std::list<T,Allocator>::size (3) - std::list<T,Allocator>::size
- std::list<T,Allocator>::sort (3) - std::list<T,Allocator>::sort
- std::list<T,Allocator>::splice (3) - std::list<T,Allocator>::splice