The standard library also defines an overload of std::remove in, which takes a const char * and is used to delete files.īecause std::remove takes value by reference, it can have unexpected behavior if it is a reference to an element of the range [first, last). These algorithms cannot be used with associative containers such as std::set and std::map because their iterator types do not dereference to MoveAssignable types (the keys in these containers are not modifiable). The similarly-named container member functions list::remove, list::remove_if, forward_list::remove, and forward_list::remove_if erase the removed elements. Oh, and one should probably note that ntfw() is absolutely not thread-safe and it may even break if some other thread changes the current working directory - a good implementation would probably not care but POSIX standard says that ntfw() can rely that a set working directory stays set during processing and some simple implementations may do so. These two invocations together constitute a so-called Erase–remove idiom, which can be achieved by the free function std::erase that has overloads for all standard sequence containers, or std::erase_if that has overloads for all standard containers (since C++20).

If the algorithm fails to allocate memory, std::bad_alloc is thrown.Ī call to remove is typically followed by a call to a container's erase method, which erases the unspecified values and reduces the physical size of the container to match its new logical size.

For any other ExecutionPolicy, the behavior is implementation-defined.

If execution of a function invoked as part of the algorithm throws an exception and ExecutionPolicy is one of the standard policies, std::terminate is called.

The overloads with a template parameter named ExecutionPolicy report errors as follows: Past-the-end iterator for the new range of values (if this is not end, then it points to an unspecified value, and so do iterators to any values between this iterator and end).Įxactly std:: distance (first, last ) applications of the predicate.

UnaryPredicate must meet the requirements of Predicate.

Remove file in c