std::list<T,Allocator>::push_front
void push_front( const T& value ); |
||
void push_front( T&& value ); |
(since C++11) |
Prepends the given element value
to the beginning of the container.
No iterators or references are invalidated.
Parameters
value | - | the value of the element to prepend |
Return value
(none).
Complexity
Constant.
Exceptions
If an exception is thrown, this function has no effect (strong exception guarantee).
Example
#include <list> #include <iostream> #include <iomanip> #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: ""
See also
(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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