| Class DS_RESIZABLE |
indexing
description:
"Bounded data structures that can be resized"
library: "Gobo Eiffel Structure Library"
author: "Eric Bezault <ericb@gobosoft.com>"
copyright: "Copyright (c) 1999-2001, Eric Bezault and others"
license: "Eiffel Forum License v2 (see forum.txt)"
deferred class interface
DS_RESIZABLE [G]
inherit
DS_CONTAINER [G]
feature {NONE} -- Initialization
make_default
-- Create an empty container and allocate memory
-- space for at least default_capacity items.
-- (From DS_CONTAINER.)
deferred
ensure
empty: is_empty
capacity_set: capacity = default_capacity
feature -- Measurement
count: INTEGER -- Number of items in container -- (From DS_CONTAINER.) deferredcapacity: INTEGER -- Maximum number of items in container deferreddefault_capacity: INTEGER -- Initial capacity in make_default -- (Default value: 10) ensure default_capacity_positive: Result >= 0
feature -- Status report
is_empty: BOOLEAN -- Is container empty? -- (From DS_CONTAINER.)is_full: BOOLEAN -- Is container full?
feature -- Comparison
is_equal (other: like Current): BOOLEAN
-- Is current container equal to other?
-- (From GENERAL.)
require
other_not_void: other /= Void
deferred
ensure
consistent: standard_is_equal (other) implies Result
same_type: Result implies same_type (other)
symmetric: Result implies other.is_equal (Current)
same_count: Result implies count = other.count
feature -- Duplication
copy (other: like Current)
-- Copy other to current container.
-- (From GENERAL.)
require
other_not_void: other /= Void
type_identity: same_type (other)
deferred
ensure
is_equal: is_equal (other)
feature -- Removal
wipe_out
-- Remove all items from container.
-- (From DS_CONTAINER.)
deferred
ensure
wiped_out: is_empty
feature -- Resizing
resize (n: INTEGER)
-- Resize container so that it can contain
-- at least n items. Do not lose any item.
require
n_large_enough: n >= capacity
deferred
ensure
capacity_set: capacity = n
invariant
positive_count: count >= 0 empty_definition: is_empty = (count = 0) -- (From DS_CONTAINER.)count_constraint: count <= capacity full_definition: is_full = (count = capacity)
end -- class DS_RESIZABLE
|
Copyright © 1999-2001, Eric
Bezault mailto:ericb@gobosoft.com http://www.gobosoft.com Last Updated: 31 March 2001 |