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IntrConstDLIterC::IntrConstDLIterC(const IntrDListC &) IntrConstDLIterC::IntrConstDLIterC(const IntrConstDLIterC &) IntrConstDLIterC::Copy(void) const IntrConstDLIterC::operator=(const IntrConstDLIterC &) IntrConstDLIterC::DLIter(void) const IntrConstDLIterC::operator<<(ostream &,const IntrConstDLIterC &) BaseIntrConstDLIterC::Data(void) const BaseIntrConstDLIterC::List(void) const BaseIntrConstDLIterC::operator==(const BaseIntrConstDLIterC &) const BaseIntrConstDLIterC::operator!=(const BaseIntrConstDLIterC &) const BaseIntrConstDLIterC::IsFirst(void) const BaseIntrConstDLIterC::IsLast(void) const BaseIntrConstDLIterC::IsElm(void) const BaseIntrConstDLIterC::First(void) BaseIntrConstDLIterC::Last(void) BaseIntrConstDLIterC::Next(void) BaseIntrConstDLIterC::Prev(void) BaseIntrConstDLIterC::NextCrc(void) BaseIntrConstDLIterC::PrevCrc(void) BaseIntrConstDLIterC::Nth(LongIntT) BaseIntrConstDLIterC::RelNth(LongIntT) BaseIntrConstDLIterC::Index(void) const BaseIntrConstDLIterC::LateItemSet(IntrDListC &) BaseIntrConstDLIterC::LateItemSet(const BaseIntrConstDLIterC &) BaseIntrConstDLIterC::IsValid(void) const

IntrConstDLIterC<class DataC>
Double-linked circular list iterator
include	"amma/InCDLIte.hh"
User Level:	Default
Library:	Mlist
Example:	exBuffer.cc
Section:	Containers.Lists
In Scope:	std

Comments:
The class 'IntrConstDLIterC' is a representation of iterator on a body of a constant double-linked list. Therefore this iterator cannot change the content of the list. Iterator is connected with a list. If the list is empty, the iterator points to the head of the list. The result of positioning of an iterator need not to be a proper element. To avoid pointing to the head of the list the head skipping moving operators NextCrc() and/or PrevCrc() must be used. The class itself covers only the construction, copying and destruction of the iterator. All other functions are inherited from the BaseIntrConstDLIterC class which cannot be constructed directly.

public BaseIntrConstDLIterC<class DataC>

IntrConstDLIterC(const IntrDListC<DataC> & list)

Creates an iterator operating on the constant 'list'. The iterator will point to the first element if there is any, otherwise to the head of the list.

IntrConstDLIterC(const IntrConstDLIterC<DataC> & iter)

Copy constructor.

IntrConstDLIterC<DataC> Copy() const

Copy constructor.

const IntrConstDLIterC<DataC> & operator=(const IntrConstDLIterC<DataC> & it)

Assingment. This iterator will point to the same list element as the iterator 'it'.

const IntrConstDLIterC<DataC> & DLIter() const

Self-identification. T function returns this object.

ostream & operator<<(ostream & s,const IntrConstDLIterC<DataC> & elm)

const DataC & Data() const

Access to the constant object contained in the list element.

const IntrDListC<DataC> & List() const

Returns the list whose element is pointed to by this iterator. ------------ Predicates -------------------------------------

BooleanT operator==(const BaseIntrConstDLIterC<DataC> & it) const

Returns TRUE if both iterators point to the same list element.

BooleanT operator!=(const BaseIntrConstDLIterC<DataC> & it) const

Returns TRUE if this iterators points to a different list element than the iterator 'it'.

BooleanT IsFirst() const

Returns TRUE if the pointed element is the first in a list.

BooleanT IsLast() const

Returns TRUE if the pointed element is the last one in a list.

BooleanT IsElm() const

Returns TRUE if the pointed an proper element (not a head) of a list. ----------- Positioning the iterator -----------------------------

BaseIntrConstDLIterC<DataC> & First()

Sets the iterator to point to the first element of the list.

BaseIntrConstDLIterC<DataC> & Last()

Sets the iterator to point to the last element of the list.

BaseIntrConstDLIterC<DataC> & Next()

Moves the iterator to the successor of the element.

BaseIntrConstDLIterC<DataC> & Prev()

Moves the iterator to the predecessor of the element.

BaseIntrConstDLIterC<DataC> & NextCrc()

Moves the iterator to the successor of the element. If the result element is not a proper element of the list the iterator is moved to the first element.

BaseIntrConstDLIterC<DataC> & PrevCrc()

Moves the iterator to the predecessor of the element. If the result element is not a proper element of the list the iterator is moved to the last element.

BaseIntrConstDLIterC<DataC> & Nth(LongIntT n)

Sets to the n-th element of the list. The index 'n' can be negative. The first element of the list has the index 0, the last element has the index -1. It does not skip the head of the list.

BaseIntrConstDLIterC<DataC> & RelNth(LongIntT n)

Moves to the n-th element from the current element. The index 'n' can be positive, zero, or negative. Particularly, the n = 0 means no move, n = 1 means the move to the next element, and n = -1 means the move to the previous element.

LongIntT Index() const

Returns the offset of an element from the first element. Particularly, it returns 0 if the iterator points to the first element, it returns -1 if element is the head of the list, and it returns -2 if the element is not contained in the list. The function does not check counter overflow. Array item constructors. ------------------------ ATTENTION! The following member functions can be used only for initialization of arrays. This constructor is provided because of trouble with an array of objects. The present ANSI C++ does not enable to pass any constructor of array elements different from a defaut constructor. The extension of GNU g++ compiler is not supported by other compiler. The constructor should be used only for such purposes. If this limitation of C++ is removed, the constructor will be obsolete.

void LateItemSet(IntrDListC<DataC> & list)

Sets the unvalid list iterator. The iterator will point to the first item of the 'list', if there is any, otherwise to the head of the list.

void LateItemSet(const BaseIntrConstDLIterC<DataC> & iter)

Sets the unvalid list iterator to be the copy of the iterator 'iter'.

BooleanT IsValid() const

Returns TRUE if the iterator was not constructed by the default constructor.