# FBB::Iterator(3bobcat)

## Iterator returning plain values
(libbobcat-dev_6.07.01)

## 2005-2025

## NAME

FBB::Iterator - Iterator returning plain values when dereferenced

FBB::ReverseIterator - reverse_iterator for FBB::Iterator

## SYNOPSIS

#include <bobcat/iterator>

## DESCRIPTION

The FBB::Iterator<Type> class template implements a bidirectional iterator for plain data types. Dereferencing FBB::Iterator objects returns values of type Type, e.g., char or int. This iterator comes in handy in case you need to initialize an objects with a range of values, which are of some basic type (see also the EXAMPLE section).

FBB::ReverseIterator implements a reverse iterator for FBB::Iterator.

## NAMESPACE

FBB
All constructors, members, operators and manipulators, mentioned in this man-page, are defined in the namespace FBB.

## INHERITS FROM

std::iterator<std::bidirectional_iterator_tag, ...>

## CONSTRUCTORS

Constructors for Iterator<Type>:

- explicit Iterator(Tye const &value):
  This constructor initializes the Iterator object with an initial Type value. When dereferencing this iterator, value is returned.

The Iterator<Type>'s default, copy, and move constructors (and its copy and move assignment operators) are available.

Constructors for ReverseIterator<Type>:

- explicit ReverseIterator(Type const &value):
  This constructor initializes the ReverseIterator object with an initial Type value. When dereferencing this iterator immediately following its construction, the decremented value is returned (without modifying the internally stored Type value);

- explicit ReverseIterator(Iterator<Type> const &iter):
  This constructor initializes the ReverseIterator object with an initial Iterator<Type> object. When dereferencing this iterator immediately following its construction, the decremented Iterator's value is returned (without modifying the Type value that is stored inside the Iterator).

The ReverseIterator<Type>'s default, copy, and move constructors (and its copy and move assignment operators) are available.

## MEMBER FUNCTIONS

For template parameter type Type all members of std::iterator<std:::reverse_iterator_tag, Type> are available, as FBB::Iterator and FBB::ReverseIterator inherit from this class.

- Iterator<Type> &operator++():
  The (prefix) increment operator increments the iterator's value and returns a reference to itself;

- Iterator<Type> &operator++(int):
  The (postfix) increment operator increments the iterator's value and returns a copy of itself, initialized with the iterator's value before it was incremented;

- Iterator<Type> &operator--():
  The (prefix) decrement operator decrements the iterator's value and returns a reference to itself;

- Iterator<Type> &operator--(int):
  The (postfix) decrement operator decrements the iterator's value and returns a copy of itself, initialized with the iterator's value before it was decremented;

- bool operator==(Iterator<Type> const &rhs) const:
  This operator returns true if the value of the current Iterator object is equal to the value of the rhs Iterator object;

- bool operator!=(Iterator<Type> const &rhs) const:
  This operator returns true if the value of the current Iterator object is not equal to the value of the rhs Iterator object;

- Type &operator*():
  The derefence operator returns a reference to the Iterator's value.

- Type const &operator*() const:
  This derefence operator returns a reference to the Iterator's immutable value.

## STATIC MEMBER FUNCTIONS

Static members of Iterator<Type>:

- Iterator<Type> last(Type value):
  An Iterator<Type> object is returned initialized with ++value, so it can be conveniently be used to create an inclusive iterator range (see also section EXAMPLE);

- Iterator<Type> max():
  An Iterator<Type> object is returned initialized with the value returned by std::numeric_limits<Type>::max();

- Iterator<Type> min():
  An Iterator<Type> object is returned initialized with the value returned by std::numeric_limits<Type>::min()

Static member of ReverseIterator<Type>:

- ReverseIterator<Type> last(Type const &value):
  A ReverseIterator<Type> object is returned initialized with Iterator<Type>::last(value), so it can be conveniently be used to create an inclusive reverse iterator range (see also section EXAMPLE);

## EXAMPLE

    #include <algorithm>
    #include <iterator>
    #include <iostream>
    #include <string>

    #include <bobcat/iterator>

    using namespace std;
    using namespace FBB;

    int main()
    {
        copy(Iterator<int>(10), Iterator<int>(20),
                ostream_iterator<int>(cout, ", "));
        cout << '\n';

        copy(Iterator<char>(*Iterator<char>::max() - 9),
                Iterator<char>::last(*Iterator<char>::max()),
                ostream_iterator<int>(cout, ", "));
        cout << '\n';

        cout << *Iterator<int>::max() << '\n';
        copy(Iterator<int>(*Iterator<int>::max() - 9),
                Iterator<int>::last(*Iterator<int>::max()),
                ostream_iterator<int>(cout, ", "));
        cout << '\n';

        copy(ReverseIterator<int>(20), ReverseIterator<int>(10),
                ostream_iterator<int>(cout, ", "));
        cout << '\n';

        std::string letters(Iterator<char>('a'), Iterator<char>::last('z'));
        cout << letters << '\n';

        std::string caps(ReverseIterator<char>::last('Z'),
                         ReverseIterator<char>('A'));
        cout << caps << '\n';

    }

## FILES

bobcat/iterator - defines the class interface

## SEE ALSO

bobcat(7)

## BUGS

None Reported.

## BOBCAT PROJECT FILES

- https://fbb-git.gitlab.io/bobcat/: gitlab project page;

Debian Bobcat project files:

- libbobcat6: debian package containing the shared library, changelog and copyright note;
- libbobcat-dev: debian package containing the static library, headers, manual pages, and developer info;

## BOBCAT

Bobcat is an acronym of `Brokken's Own Base Classes And Templates'.

## COPYRIGHT

This is free software, distributed under the terms of the GNU General Public License (GPL).

## AUTHOR

Frank B. Brokken (f.b.brokken@rug.nl).