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std::deque::push_front(3) C++ Standard Libary std::deque::push_front(3) NAME std::deque::push_front - std::deque::push_front Synopsis 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. All iterators, including the past-the-end iterator, are invalidated. No 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 ex- ception guarantee). Example // Run this code #include <deque> #include <iostream> #include <iomanip> #include <string> int main() { std::deque<std::string> letters; letters.push_front("abc"); std::string s{"def"}; letters.push_front(std::move(s)); std::cout << "std::deque `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::deque `letters` holds: "def" "abc" Moved-from string `s` holds: "" See also emplace_front constructs an element in-place at the beginning (C++11) (public member function) push_back adds an element to the end (public member function) pop_front removes the first element (public member function) creates a std::front_insert_iterator of type inferred from the front_inserter argument (function template) http://cppreference.com 2022.07.31 std::deque::push_front(3)
NAME | Synopsis | Parameters | Return value | Complexity | Exceptions | Example | Possible output: | See also
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