Automatic generation produced by ISE Eiffel
indexing description: "Stacks with a bounded physical size, implemented by arrays" status: "See notice at end of class" names: dispenser, array representation: array access: fixed, lifo, membership size: fixed contents: generic date: "$Date: 2001-11-16 20:32:23 +0000 (Fri, 16 Nov 2001) $" revision: "$Revision: 51435 $" class interface BOUNDED_STACK [G] create make (n: INTEGER) -- Create a stack for at most n items. require non_negative_argument: n >= 0 ensure stack_allocated: capacity = n empty_stack: count = 0 feature -- Initialization make (n: INTEGER) -- Create a stack for at most n items. require non_negative_argument: n >= 0 ensure stack_allocated: capacity = n empty_stack: count = 0 feature -- Access has (v: G): BOOLEAN -- Does v appear in stack? -- (Reference or object equality, -- based on object_comparison.) ensure -- from CONTAINER not_found_in_empty: Result implies not is_empty item: G -- Last item pushed (i.e. top) require -- from ACTIVE readable: readable require else not_empty: count > 0 feature -- Measurement capacity: INTEGER count: INTEGER occurrences (v: G): INTEGER ensure -- from BAG non_negative_occurrences: Result >= 0 feature -- Status report changeable_comparison_criterion: BOOLEAN -- May object_comparison be changed? -- (Answer: yes by default.) -- (from CONTAINER) extendible: BOOLEAN ensure then Result = not full full: BOOLEAN -- Is structure full? -- (from BOUNDED) is_empty: BOOLEAN -- Is structure empty? -- (from FINITE) is_inserted (v: G): BOOLEAN -- Has v been inserted by the most recent insertion? -- (By default, the value returned is equivalent to calling -- `has (v)'. However, descendants might be able to provide more -- efficient implementations.) -- (from COLLECTION) object_comparison: BOOLEAN -- Must search operations use equal rather than = -- for comparing references? (Default: no, use =.) -- (from CONTAINER) Prunable: BOOLEAN is True readable: BOOLEAN -- Is there a current item that may be read? -- (from DISPENSER) Resizable: BOOLEAN is True writable: BOOLEAN -- Is there a current item that may be modified? -- (from DISPENSER) feature -- Status setting compare_objects -- Ensure that future search operations will use equal -- rather than = for comparing references. -- (from CONTAINER) require -- from CONTAINER changeable_comparison_criterion ensure -- from CONTAINER object_comparison compare_references -- Ensure that future search operations will use = -- rather than equal for comparing references. -- (from CONTAINER) require -- from CONTAINER changeable_comparison_criterion ensure -- from CONTAINER reference_comparison: not object_comparison feature -- Element change append (s: SEQUENCE [G]) -- Append a copy of s. -- (Synonym for fill) -- (from DISPENSER) extend (v: like item) -- Push v on top. -- Was declared in BOUNDED_STACK as synonym of force and put. require -- from COLLECTION extendible: extendible ensure -- from COLLECTION item_inserted: is_inserted (v) ensure then -- from BAG one_more_occurrence: occurrences (v) = old (occurrences (v)) + 1 ensure then -- from STACK item_pushed: item = v fill (other: LINEAR [G]) -- Fill with as many items of other as possible. -- Fill items with greatest index from other first. -- Items inserted with lowest index (from other) will -- always be on the top of stack. -- The representations of other and current structure -- need not be the same. -- (from STACK) require -- from COLLECTION other_not_void: other /= void extendible force (v: like item) -- Push v on top. -- Was declared in BOUNDED_STACK as synonym of extend and put. ensure then -- from STACK item_pushed: item = v put (v: like item) -- Push v on top. -- Was declared in BOUNDED_STACK as synonym of extend and force. require -- from COLLECTION extendible: extendible ensure -- from COLLECTION item_inserted: is_inserted (v) ensure then -- from STACK item_pushed: item = v replace (v: like item) -- Replace top item by v. require -- from ACTIVE writable: writable ensure -- from ACTIVE item_replaced: item = v feature -- Removal remove -- Remove top item. require -- from ACTIVE prunable: prunable writable: writable require else not_empty: count /= 0 wipe_out -- Remove all items. require -- from COLLECTION prunable ensure -- from COLLECTION wiped_out: is_empty feature -- Conversion linear_representation: ARRAYED_LIST [G] -- Representation as a linear structure -- (in the reverse order of original insertion) invariant count_small_enough: count <= capacity extendible_definition: extendible = not full -- from ANY reflexive_equality: standard_is_equal (Current) reflexive_conformance: conforms_to (Current) -- from DISPENSER readable_definition: readable = not is_empty writable_definition: writable = not is_empty -- from ACTIVE writable_constraint: writable implies readable empty_constraint: is_empty implies (not readable) and (not writable) -- from FINITE empty_definition: is_empty = (count = 0) non_negative_count: count >= 0 -- from BOUNDED valid_count: count <= capacity full_definition: full = (count = capacity) indexing library: "[ EiffelBase: Library of reusable components for Eiffel. ]" status: "[ Copyright 1986-2001 Interactive Software Engineering (ISE). For ISE customers the original versions are an ISE product covered by the ISE Eiffel license and support agreements. ]" license: "[ EiffelBase may now be used by anyone as FREE SOFTWARE to develop any product, public-domain or commercial, without payment to ISE, under the terms of the ISE Free Eiffel Library License (IFELL) at http://eiffel.com/products/base/license.html. ]" source: "[ Interactive Software Engineering Inc. ISE Building 360 Storke Road, Goleta, CA 93117 USA Telephone 805-685-1006, Fax 805-685-6869 Electronic mail <info@eiffel.com> Customer support http://support.eiffel.com ]" info: "[ For latest info see award-winning pages: http://eiffel.com ]" end -- class BOUNDED_STACK -- Generated by ISE Eiffel --
For more details: www.eiffel.com