48 lines
905 B
Plaintext
48 lines
905 B
Plaintext
|
note
|
||
|
|
description: "[
|
||
|
|
A {LINKED_STACK} which allows inspection of any item, not just the
|
||
|
|
top one. Items are still added to and removed from the top.
|
||
|
|
]"
|
||
|
|
author: "Jimmy J. Johnson"
|
||
|
|
date: "10/27/21"
|
||
|
|
copyright: "Copyright (c) 2021, Jimmy J. Johnson"
|
||
|
|
license: "Eiffel Forum v2 (http://www.eiffel.com/licensing/forum.txt)"
|
||
|
|
|
||
|
|
class
|
||
|
|
JJ_LINKED_STACK [G]
|
||
|
|
|
||
|
|
inherit
|
||
|
|
|
||
|
|
LINKED_STACK [G]
|
||
|
|
export {ANY}
|
||
|
|
i_th,
|
||
|
|
first,
|
||
|
|
last,
|
||
|
|
valid_index
|
||
|
|
redefine
|
||
|
|
i_th,
|
||
|
|
at
|
||
|
|
end
|
||
|
|
|
||
|
|
create
|
||
|
|
make
|
||
|
|
|
||
|
|
feature -- Access
|
||
|
|
|
||
|
|
i_th alias "[]" (a_index: INTEGER): like item
|
||
|
|
-- Redefined to anchor to item.
|
||
|
|
do
|
||
|
|
Result := Precursor {LINKED_STACK} (a_index)
|
||
|
|
end
|
||
|
|
|
||
|
|
feature {NONE} -- Implementation
|
||
|
|
|
||
|
|
at alias "@" (i: INTEGER): like item
|
||
|
|
-- Entry at index `i', if in index interval.
|
||
|
|
-- Redefined to make result type "like item" instead of type G.
|
||
|
|
do
|
||
|
|
Result := Precursor {LINKED_STACK} (i)
|
||
|
|
end
|
||
|
|
|
||
|
|
end
|