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std::deque<T,Allocator>::push_back

void push_back( const T& value );	(1)
void push_back( T&& value );	(2)	(since C++11)

Appends the given element value to the end of the container.

1) The new element is initialized as a copy of value.

2) value is moved into the new element.

All iterators, including the past-the-end iterator, are invalidated. No references are invalidated.

Parameters

value	-	the value of the element to append
Type requirements
-`T` must meet the requirements of CopyInsertable in order to use overload (1).
-`T` must meet the requirements of MoveInsertable in order to use overload (2).

Return value

(none).

Complexity

Constant.

Exceptions

If an exception is thrown (which can be due to Allocator::allocate() or element copy/move constructor/assignment), this function has no effect (strong exception guarantee).

Example

#include <deque>
#include <iostream>
#include <iomanip>
 
int main()
{
    std::deque<std::string> numbers;
 
    numbers.push_back("abc");
    std::string s = "def";
    numbers.push_back(std::move(s));
 
    std::cout << "deque holds: ";
    for (auto&& i : numbers) std::cout << std::quoted(i) << ' ';
    std::cout << "\nMoved-from string holds " << std::quoted(s) << '\n';
}

Output:

deque holds: "abc" "def" 
Moved-from string holds ""