EiffelBase class
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Eiffel Class
indexing
description: "Objects that are able to iterate over two-way chains, on which they can perform repeated actions and tests according to a number of predefined control structures such as ``if%'%', ``until%'%' and others.";
status: "See notice at end of class";
names: iterators, iteration, two_way_chain_iterators, two_way_chain_iteration;
traversal: sequential;
exploration: forward, backward;
date: "$Date: 2007-03-30 11:10:11 -0800 (Fri, 30 Mar 2007) $";
revision: "$Revision: 95354 $"
class TWO_WAY_CHAIN_ITERATOR [G]
inherit
LINEAR_ITERATOR [G]
redefine
target
select
start, forth, do_all, until_do, do_until, while_do, do_while, do_if, do_for, search, forall, exists, until_continue, continue_until, while_continue, continue_while, continue_for, continue_search
end;
LINEAR_ITERATOR [G]
rename
start as finish,
forth as back,
do_all as do_all_back,
until_do as until_do_back,
do_until as do_until_back,
do_while as do_while_back,
while_do as while_do_back,
do_if as do_if_back,
do_for as do_for_back,
search as search_back,
forall as forall_back,
exists as exists_back,
until_continue as until_continue_back,
continue_until as continue_until_back,
while_continue as while_continue_back,
continue_while as continue_while_back,
continue_for as continue_for_back,
continue_search as continue_search_back
redefine
back, finish, target
end
feature -- Access
target: CHAIN [G];
feature -- Cursor movement
finish is
-- Move cursor of target to last position.
do
target.finish
end;
back is
-- Move cursor of target backward one position.
do
target.back
end;
end -- class TWO_WAY_CHAIN_ITERATOR
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