void push_front( const T& value ); | (1) | |
void push_front( T&& value ); | (2) | (since C++11) |
Prepends the given element value to the beginning of the container.
No iterators or references are invalidated.
| value | - | the value of the element to prepend |
(none).
Constant.
If an exception is thrown, this function has no effect (strong exception guarantee).
#include <list>
#include <iomanip>
#include <iostream>
#include <string>
int main()
{
std::list<std::string> letters;
letters.push_front("abc");
std::string s{"def"};
letters.push_front(std::move(s));
std::cout << "std::list `letters` holds: ";
for (auto&& e : letters)
std::cout << std::quoted(e) << ' ';
std::cout << "\nMoved-from string `s` holds: " << std::quoted(s) << '\n';
}Possible output:
std::list `letters` holds: "def" "abc" Moved-from string `s` holds: ""
|
(C++11) | constructs an element in-place at the beginning (public member function) |
| adds an element to the end (public member function) |
|
| removes the first element (public member function) |
|
creates a std::front_insert_iterator of type inferred from the argument (function template) |
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