FreeBSD Manual Pages
std::vector::erase(3) C++ Standard Libary std::vector::erase(3) NAME std::vector::erase - std::vector::erase Synopsis iterator erase( iterator pos ); (until C++11) iterator erase( const_iterator pos ); (since C++11) (until C++20) constexpr iterator erase( const_iterator pos ); (since C++20) iterator erase( iterator first, iterator last ); (1) (until C++11) iterator erase( const_iterator first, (since C++11) const_iterator last ); (2) (until C++20) constexpr iterator erase( const_iterator first, (since C++20) const_iterator last ); Erases the specified elements from the container. 1) Removes the element at pos. 2) Removes the elements in the range [first, last). Invalidates iterators and references at or after the point of the erase, including the end() iterator. The iterator pos must be valid and dereferenceable. Thus the end() iterator (which is valid, but is not dereferenceable) cannot be used as a value for pos. The iterator first does not need to be dereferenceable if first==last: erasing an empty range is a no-op. Parameters pos - iterator to the element to remove first, last - range of elements to remove Type requirements - T must meet the requirements of MoveAssignable. Return value Iterator following the last removed element. If pos refers to the last element, then the end() iterator is re- turned. If last==end() prior to removal, then the updated end() iterator is returned. If [first, last) is an empty range, then last is returned. Exceptions Does not throw unless an exception is thrown by the assignment oper- ator of T. Complexity Linear: the number of calls to the destructor of T is the same as the number of elements erased, the assignment operator of T is called the number of times equal to the number of elements in the vector after the erased elements Example // Run this code #include <vector> #include <iostream> void print_container(const std::vector<int>& c) { for (int i : c) { std::cout << i << " "; } std::cout << '\n'; } int main( ) { std::vector<int> c{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}; print_container(c); c.erase(c.begin()); print_container(c); c.erase(c.begin()+2, c.begin()+5); print_container(c); // Erase all even numbers (C++11 and later) for (std::vector<int>::iterator it = c.begin(); it != c.end(); ) { if (*it % 2 == 0) { it = c.erase(it); } else { ++it; } } print_container(c); } Output: 0 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 6 7 8 9 1 7 9 See also clear clears the contents (public member function) http://cppreference.com 2022.07.31 std::vector::erase(3)
NAME | Synopsis | Parameters | Type requirements | Return value | Exceptions | Complexity | Example | Output: | See also
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=std::vector::erase&sektion=3&manpath=FreeBSD+Ports+15.0>