std::future<void>

Nice catch. I've spent that last few hours addressing that, and I'll have a follow up question.

Great feedback again, btw!

Reorder magic vs mundane functions: todo

mutable std::atomic<node *> first: I had originally done this, but I felt that it was better to have it be properly const, and make it clear in the exact location where bypassing this was needed.

seperate to separate: ✓ change exchange overloads to different names: ✓ fix range-based insert_after to return last iterator: ✓

Infinite loop on non-x86: Are there platforms where the updated value will never be seen by the waiting thread? As long as it happens eventually, it will continue.

Use inline functions for terminal and spin: ✓ Fix comment at ForwardIterator definition: ✓ Rename ForwardIterator to iterator_template: ✓ Properly constrain iterator operators: ✓ Fix decrement comment to increment: ✓ Use --foo instead of fetch_sub: ✓