>...
/*
* Deletes items from the array without deallocating underlying memory
* @param a array
*/
This does look like a bug, if not functionally, then by the described intent. The comment states that the intent is to delete items without deallocating; yet zeroing the capacity cuts any future way to deallocate properly, unless it's just an array of simple types (free(baseptr)). If there are any pointer types, then there will remain no safe way to deallocate the elements' contents.
Sure, there could be other ways of keeping inventory of the allocated memory, but this detaches the array from knowing its allocated bounds.
This does look like a bug, if not functionally, then by the described intent. The comment states that the intent is to delete items without deallocating; yet zeroing the capacity cuts any future way to deallocate properly, unless it's just an array of simple types (free(baseptr)). If there are any pointer types, then there will remain no safe way to deallocate the elements' contents.
Sure, there could be other ways of keeping inventory of the allocated memory, but this detaches the array from knowing its allocated bounds.