forward_list Class

Describes an object that controls a varying-length sequence of elements. The sequence is stored as a singly-linked list of nodes, each containing a member of type Type.

template<class Type, class Allocator = allocator<Type> >
    class forward_list {
public:
    typedef Allocator allocator_type;
    typedef typename Allocator::pointer pointer;
    typedef typename Allocator::const_pointer
        const_pointer;
    typedef typename Allocator::reference reference;
    typedef typename Allocator::const_reference const_reference;
    typedef typename Allocator::value_type value_type;
    typedef typename Allocator::size_type size_type;
    typedef typename Allocator::difference_type difference_type;

    typedef T0 iterator;
    typedef T1 const_iterator;

    forward_list();
    explicit forward_list(const Allocator& _Alloc);
    explicit forward_list(size_type _Count);
    forward_list(
        size_type _Count, 
        const Type& _Val
    );
    forward_list(
        size_type _Count, 
        const Type& _Val, 
        const Allocator& _Alloc
    );
    forward_list(const forward_list& _Right);
    template<class InputIterator>
        forward_list (
            InputIterator _First, 
            InputIterator _Last
);
    template<class InputIterator>
        forward_list (
            InputIterator _First,
            InputIterator _Last, 
            const Allocator& _Alloc
);

    forward_list (initializer_list<Type> _Init)
    forward_list (
        initializer_list<Type> _Init,
        const Allocator& _Alloc
);
    forward_list (forward_list&& _Right);
 
    ~forward_list();

    forward_list& operator= (const forward_list& _Right);
    forward_list& operator= (forward_list&& _Right);

    iterator before_begin ();
    const_iterator before_begin () const;
    iterator begin ();
    const_iterator begin () const;
    iterator end ();
    const_iterator end () const;

    const_iterator cbefore_begin () const;
    const_iterator cbegin () const;
    const_iterator cend () const;

    void resize (size_type _Count);
    void resize (
        size_type _Count, 
        const Type& _Val
    );
    size_type max_size () const;
    bool empty () const;

    Alloc get_allocator () const;

    reference front ();
    const_reference front () const;

    void push_front (const Type& _Val);
    void push_front (Type&& _Val);
    template<class _Type>
        void emplace_front(_Type&& _Val);
    void pop_front ();

    template<class InputIterator>
        void assign (
            InputIterator _First, 
            InputIterator _Last
);
    void assign (
        size_type _Count, 
        const Type& _Val
    );

    iterator insert_after (
        const_iterator _Pos, 
        const Type& _Val
    );
    void insert_after (
        const_iterator _Pos, 
        size_type _Count, 
        const Type& _Val
    );
    template<class InputIterator >
        void insert_after (
            const_iterator _Pos, 
            InputIterator _First, 
            InputIterator _Last
        );
    void insert_after (
        const iterator _Pos, 
        initializer_list<Type> _Init
)
    iterator insert_after (
        const_iterator _Pos, 
        Type&& _Val
    );
    template<class Type>
        iterator emplace_after(const_iterator _Where, Type&& _Val);
    iterator erase_after (const_iterator _Pos);
    iterator erase_after (
        const_iterator _First, 
        const_iterator _Last
    );
    void clear ();

    void swap (forward_list& _Right);

    void splice_after (
        const_iterator _Pos, 
        forward_list& _List
    );
    void splice_after (
        const_iterator _Pos, 
        forward_list& _List, 
        iterator _First
    );
    void splice_after (
        const_iterator _Pos, 
        forward_list& _List, 
        iterator _First,
        iterator _Last);

    void remove (const Type& _Val);
    template<class Predicate>
        void remove_if (Predicate _Pred);
    void unique ();
    template<class BinaryPredicate>
        void unique (BinaryPredicate _Comp);

    void merge (forward_list& _List);
    template<class BinaryPredicate>
        void merge (
            forward_list& _List, 
            BinaryPredicate _Comp
);
    void sort ();
    template<class BinaryPredicate>
        void sort (BinaryPredicate _Comp);
    void reverse ();
};

Parameters

Parameter	Description
Type	The element data type to be stored in the forward_list.
_Alloc	The stored allocator object that encapsulates details about the forward_list allocation and deallocation of memory. This parameter is optional. The default value is allocator<Type>.
_Count	The number of elements in a forward_list.
_Val	The element to add to the forward_list.
_Right	The list to incorporate into the forward_list.
_Pos	The iterator indicating a location in the forward_list.
_First	The iterator indicating the start location for a range of elements in the forward_list.
_Last	The iterator indicating the end location for a range of elements in the forward_list.
_Init	The initializer list
_List	The forward_list to merge, splice, or assign from.
_Comp	The comparison function.

Remarks

A forward_list object allocates and frees storage for the sequence it controls through a stored object of class Allocator that is based on allocator Class (commonly known as std::allocator). For more information, see Allocators. An allocator object must have the same external interface as an object of template class allocator.

Notes

The stored allocator object is not copied when the container object is assigned.

Iterators, pointers and references might become invalid when elements of their controlled sequence are erased through forward_list. Insertions and splices performed on the controlled sequence through forward_list do not invalidate iterators.

Additions to the controlled sequence might occur by calls to forward_list::insert_after, which is the only member function that calls the constructor Type(const _Type&). forward_list might also call move constructors. If such an expression throws an exception, the container object inserts no new elements and rethrows the exception. Thus, an object of template class forward_list is left in a known state when such exceptions occur.

Requirements

Header: <forward_list>

Namespace: std

See Also

Reference

<forward_list>

Other Resources

<forward_list> Members