Automatic generation produced by ISE Eiffel
note description: "[ Subsets that are traversable linearly without commitment to a concrete implementation. ]" library: "Free implementation of ELKS library" legal: "See notice at end of class." status: "See notice at end of class." names: linear_subset, subset, set access: membership contents: generic date: "$Date: 2023-09-26 07:19:46 -0800 (Tue, 26 Sep 2023) $" revision: "$Revision: 107317 $" deferred class interface LINEAR_SUBSET [G -> ] feature -- Access generating_type: TYPE [detachable LINEAR_SUBSET [G]] -- Type of current object -- (type of which it is a direct instance) -- (from ANY) ensure -- from ANY generating_type_not_void: Result /= Void generator: STRING_8 -- Name of current object's generating class -- (base class of the type of which it is a direct instance) -- (from ANY) ensure -- from ANY generator_not_void: Result /= Void generator_not_empty: not Result.is_empty has (v: G): BOOLEAN -- Does structure include v? -- (Reference or object equality, -- based on `object_comparison`.) -- (from CONTAINER) ensure -- from CONTAINER not_found_in_empty: Result implies not is_empty index: INTEGER_32 -- Current index item: G -- Current item -- (from TRAVERSABLE_SUBSET) require -- from TRAVERSABLE_SUBSET not_off: not off new_cursor: ITERATION_CURSOR [G] -- Fresh cursor associated with current structure -- (from ITERABLE) ensure -- from ITERABLE result_attached: Result /= Void feature -- Measurement count: INTEGER_32 -- Number of items -- (from TRAVERSABLE_SUBSET) feature -- Comparison frozen deep_equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void -- or attached to isomorphic object structures? -- (from ANY) ensure -- from ANY instance_free: class shallow_implies_deep: standard_equal (a, b) implies Result both_or_none_void: (a = Void) implies (Result = (b = Void)) same_type: (Result and (a /= Void)) implies (b /= Void and then a.same_type (b)) symmetric: Result implies deep_equal (b, a) disjoint (other: TRAVERSABLE_SUBSET [G]): BOOLEAN -- Do current set and other have no -- items in common? -- (from TRAVERSABLE_SUBSET) require -- from SUBSET set_exists: other /= Void same_rule: object_comparison = other.object_comparison frozen equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void or attached -- to objects considered equal? -- (from ANY) ensure -- from ANY instance_free: class definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.is_equal (b)) frozen is_deep_equal alias "≡≡≡" (other: LINEAR_SUBSET [G]): BOOLEAN -- Are Current and other attached to isomorphic object structures? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY shallow_implies_deep: standard_is_equal (other) implies Result same_type: Result implies same_type (other) symmetric: Result implies other.is_deep_equal (Current) is_equal (other: LINEAR_SUBSET [G]): BOOLEAN -- Is other attached to an object considered -- equal to current object? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY symmetric: Result implies other ~ Current consistent: standard_is_equal (other) implies Result is_subset alias "⊆" (other: TRAVERSABLE_SUBSET [G]): BOOLEAN -- Is current set a subset of other? -- (from TRAVERSABLE_SUBSET) require -- from SUBSET set_exists: other /= Void same_rule: object_comparison = other.object_comparison is_superset alias "⊇" (other: SUBSET [G]): BOOLEAN -- Is current set a superset of other? -- (from SUBSET) require -- from SUBSET set_exists: other /= Void same_rule: object_comparison = other.object_comparison frozen standard_equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void or attached to -- field-by-field identical objects of the same type? -- Always uses default object comparison criterion. -- (from ANY) ensure -- from ANY instance_free: class definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.standard_is_equal (b)) frozen standard_is_equal alias "≜" (other: LINEAR_SUBSET [G]): BOOLEAN -- Is other attached to an object of the same type -- as current object, and field-by-field identical to it? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY same_type: Result implies same_type (other) symmetric: Result implies other.standard_is_equal (Current) feature -- Status report after: BOOLEAN -- Is cursor behind last item? -- (from TRAVERSABLE_SUBSET) before: BOOLEAN -- Is cursor at left from first item? conforms_to (other: ANY): BOOLEAN -- Does type of current object conform to type -- of other (as per Eiffel: The Language, chapter 13)? -- (from ANY) require -- from ANY other_not_void: other /= Void extendible: BOOLEAN -- May new items be added? -- (from COLLECTION) is_empty: BOOLEAN -- Is container empty? -- (from TRAVERSABLE_SUBSET) 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) islast: BOOLEAN -- Is cursor at last item? object_comparison: BOOLEAN -- Must search operations use `equal` rather than = -- for comparing references? (Default: no, use =.) -- (from CONTAINER) off: BOOLEAN -- Is cursor off the active items? -- (from TRAVERSABLE_SUBSET) prunable: BOOLEAN -- May items be removed? -- (from COLLECTION) same_type (other: ANY): BOOLEAN -- Is type of current object identical to type of other? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY definition: Result = (conforms_to (other) and other.conforms_to (Current)) valid_index (i: INTEGER_32): BOOLEAN -- Is i a valid index? ensure valid_index_definition: Result = ((i >= 1) and (i <= count)) 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: 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: changeable_comparison_criterion ensure -- from CONTAINER reference_comparison: not object_comparison feature -- Cursor movement forth -- Move cursor to next element. -- (from TRAVERSABLE_SUBSET) require -- from TRAVERSABLE_SUBSET not_after: not after go_i_th (i: INTEGER_32) -- Move cursor to i-th item. require valid_index: valid_index (i) ensure cursor_moved: index = i start -- Move cursor to first item. -- (from TRAVERSABLE_SUBSET) feature -- Element change extend (v: G) -- Ensure that set includes v. -- Was declared in {SET} as synonym of `put`. -- (from SET) require -- from COLLECTION extendible: extendible ensure -- from COLLECTION item_inserted: is_inserted (v) ensure then -- from SET in_set_already: old has (v) implies (count = old count) added_to_set: not old has (v) implies (count = old count + 1) fill (other: CONTAINER [G]) -- Fill with as many items of other as possible. -- The representations of other and current structure -- need not be the same. -- (from COLLECTION) require -- from COLLECTION other_not_void: other /= Void extendible: extendible merge (other: CONTAINER [G]) -- Add all items of other. -- (from TRAVERSABLE_SUBSET) require -- from SUBSET set_exists: other /= Void same_rule: object_comparison = other.object_comparison move_item (v: G) -- Move v to the left of cursor. require not_before: not before item_in_set: has (v) put (v: G) -- Ensure that set includes v. -- Was declared in {SET} as synonym of `extend`. -- (from SET) require -- from COLLECTION extendible: extendible ensure -- from COLLECTION item_inserted: is_inserted (v) ensure then -- from SET in_set_already: old has (v) implies (count = old count) added_to_set: not old has (v) implies (count = old count + 1) put_left (v: G) -- Insert v before the cursor. require not_before: not before ensure cursor_position_unchanged: index = old index + 1 feature -- Removal changeable_comparison_criterion: BOOLEAN -- May `object_comparison` be changed? -- (Answer: only if set empty; otherwise insertions might -- introduce duplicates, destroying the set property.) -- (from SET) require -- from CONTAINER True ensure then -- from SET only_on_empty: Result = is_empty prune (v: G) -- Remove v if present. -- (from SET) require -- from COLLECTION prunable: prunable ensure then -- from SET removed_count_change: old has (v) implies (count = old count - 1) not_removed_no_count_change: not old has (v) implies (count = old count) item_deleted: not has (v) prune_all (v: G) -- Remove all occurrences of v. -- (Reference or object equality, -- based on `object_comparison`.) -- (from COLLECTION) require -- from COLLECTION prunable: prunable ensure -- from COLLECTION no_more_occurrences: not has (v) remove -- Remove current item. -- (from TRAVERSABLE_SUBSET) require -- from TRAVERSABLE_SUBSET not_off: not off wipe_out -- Remove all items. -- (from COLLECTION) require -- from COLLECTION prunable: prunable ensure -- from COLLECTION wiped_out: is_empty feature -- Conversion linear_representation: LINEAR [G] -- Representation as a linear structure -- (from CONTAINER) feature -- Duplication copy (other: LINEAR_SUBSET [G]) -- Update current object using fields of object attached -- to other, so as to yield equal objects. -- (from ANY) require -- from ANY other_not_void: other /= Void type_identity: same_type (other) ensure -- from ANY is_equal: Current ~ other frozen deep_copy (other: LINEAR_SUBSET [G]) -- Effect equivalent to that of: -- `copy` (other . `deep_twin`) -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY deep_equal: deep_equal (Current, other) frozen deep_twin: LINEAR_SUBSET [G] -- New object structure recursively duplicated from Current. -- (from ANY) ensure -- from ANY deep_twin_not_void: Result /= Void deep_equal: deep_equal (Current, Result) frozen standard_copy (other: LINEAR_SUBSET [G]) -- Copy every field of other onto corresponding field -- of current object. -- (from ANY) require -- from ANY other_not_void: other /= Void type_identity: same_type (other) ensure -- from ANY is_standard_equal: standard_is_equal (other) frozen standard_twin: LINEAR_SUBSET [G] -- New object field-by-field identical to other. -- Always uses default copying semantics. -- (from ANY) ensure -- from ANY standard_twin_not_void: Result /= Void equal: standard_equal (Result, Current) frozen twin: LINEAR_SUBSET [G] -- New object equal to Current -- `twin` calls `copy`; to change copying/twinning semantics, redefine `copy`. -- (from ANY) ensure -- from ANY twin_not_void: Result /= Void is_equal: Result ~ Current feature -- Basic operations frozen default: detachable LINEAR_SUBSET [G] -- Default value of object's type -- (from ANY) frozen default_pointer: POINTER -- Default value of type POINTER -- (Avoid the need to write p.`default` for -- some p of type POINTER.) -- (from ANY) ensure -- from ANY instance_free: class default_rescue -- Process exception for routines with no Rescue clause. -- (Default: do nothing.) -- (from ANY) frozen do_nothing -- Execute a null action. -- (from ANY) ensure -- from ANY instance_free: class intersect (other: TRAVERSABLE_SUBSET [G]) -- Remove all items not in other. -- No effect if other `is_empty`. -- (from TRAVERSABLE_SUBSET) require -- from SUBSET set_exists: other /= Void same_rule: object_comparison = other.object_comparison ensure -- from SUBSET is_subset_other: is_subset (other) subtract (other: TRAVERSABLE_SUBSET [G]) -- Remove all items also in other. -- (from TRAVERSABLE_SUBSET) require -- from SUBSET set_exists: other /= Void same_rule: object_comparison = other.object_comparison ensure -- from SUBSET is_disjoint: disjoint (other) symdif (other: TRAVERSABLE_SUBSET [G]) -- Remove all items also in other, and add all -- items of other not already present. -- (from TRAVERSABLE_SUBSET) require -- from SUBSET set_exists: other /= Void same_rule: object_comparison = other.object_comparison feature -- Output Io: STD_FILES -- Handle to standard file setup -- (from ANY) ensure -- from ANY instance_free: class io_not_void: Result /= Void out: STRING_8 -- New string containing terse printable representation -- of current object -- (from ANY) ensure -- from ANY out_not_void: Result /= Void print (o: detachable ANY) -- Write terse external representation of o -- on standard output. -- (from ANY) ensure -- from ANY instance_free: class frozen tagged_out: STRING_8 -- New string containing terse printable representation -- of current object -- (from ANY) ensure -- from ANY tagged_out_not_void: Result /= Void feature -- Platform Operating_environment: OPERATING_ENVIRONMENT -- Objects available from the operating system -- (from ANY) ensure -- from ANY instance_free: class operating_environment_not_void: Result /= Void invariant before_definition: before = (index = 0) -- from TRAVERSABLE_SUBSET empty_definition: is_empty = (count = 0) count_range: count >= 0 -- from ANY reflexive_equality: standard_is_equal (Current) reflexive_conformance: conforms_to (Current) note copyright: "Copyright (c) 1984-2017, Eiffel Software and others" license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)" source: "[ Eiffel Software 5949 Hollister Ave., Goleta, CA 93117 USA Telephone 805-685-1006, Fax 805-685-6869 Website http://www.eiffel.com Customer support http://support.eiffel.com ]" end -- class LINEAR_SUBSET -- Generated by Eiffel Studio --
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