std::forward_list

std::forward_list is a singly linked list. It’s similar to std::list, but each element points only to the next element and not the previous. This reduces memory overhead compared to std::list but at the cost of bidirectional iteration. Choose std::forward_list when you require a list structure but don’t need to traverse backward and wish to save on memory overhead.

Purpose and suitability

The std::forward_list is a singly linked list container in the STL. Its primary appeal lies in the following:

• Efficient insertions and deletions at any location in the list
• Consuming less memory than std::list since it doesn’t store previous pointers

It’s especially fitting in the following contexts:

• You require constant-time insertions or deletions irrespective of the position.
• Memory overhead is a concern.
• Bidirectional iteration is not needed.

While std::vector excels in random access, turn to std::forward_list...