note description: "[ Project-wide universal properties. This class is an ancestor to all developer-written classes. ANY may be customized for individual projects or teams. ]" library: "Free implementation of ELKS library" status: "See notice at end of class." legal: "See notice at end of class." date: "$Date: 2018-04-28 20:54:31 +0000 (Sat, 28 Apr 2018) $" revision: "$Revision: 101701 $" class ANY create default_create feature -- Access generator: STRING_8 -- Name of current object's generating class -- (base class of the type of which it is a direct instance) external "built_in" ensure generator_not_void: Result /= Void generator_not_empty: not Result.is_empty end generating_type: TYPE [detachable like Current] -- Type of current object -- (type of which it is a direct instance) external "built_in" ensure generating_type_not_void: Result /= Void end feature -- Status report conforms_to (other: ANY): BOOLEAN -- Does type of current object conform to type -- of other (as per Eiffel: The Language, chapter 13)? require other_not_void: other /= Void external "built_in" end same_type (other: ANY): BOOLEAN -- Is type of current object identical to type of other? require other_not_void: other /= Void external "built_in" ensure definition: Result = (conforms_to (other) and other.conforms_to (Current)) end feature -- Comparison is_equal (other: like Current): BOOLEAN -- Is other attached to an object considered -- equal to current object? require other_not_void: other /= Void external "built_in" ensure symmetric: Result implies other ~ Current consistent: standard_is_equal (other) implies Result end frozen standard_is_equal (other: like Current): BOOLEAN -- Is other attached to an object of the same type -- as current object, and field-by-field identical to it? require other_not_void: other /= Void external "built_in" ensure same_type: Result implies same_type (other) symmetric: Result implies other.standard_is_equal (Current) end frozen equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void or attached -- to objects considered equal? do if a = Void then Result := b = Void else Result := b /= Void and then a.is_equal (b) end ensure instance_free: class definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.is_equal (b)) end 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. do if a = Void then Result := b = Void else Result := b /= Void and then a.standard_is_equal (b) end ensure instance_free: class definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.standard_is_equal (b)) end frozen is_deep_equal (other: like Current): BOOLEAN -- Are Current and other attached to isomorphic object structures? require other_not_void: other /= Void external "built_in" ensure shallow_implies_deep: standard_is_equal (other) implies Result same_type: Result implies same_type (other) symmetric: Result implies other.is_deep_equal (Current) end frozen deep_equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void -- or attached to isomorphic object structures? do if a = Void then Result := b = Void else Result := b /= Void and then a.is_deep_equal (b) end ensure 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) end feature -- Duplication frozen twin: like Current -- New object equal to Current -- twin calls copy; to change copying/twinning semantics, redefine copy. external "built_in" ensure twin_not_void: Result /= Void is_equal: Result ~ Current end copy (other: like Current) -- Update current object using fields of object attached -- to other, so as to yield equal objects. require other_not_void: other /= Void type_identity: same_type (other) external "built_in" ensure is_equal: Current ~ other end frozen standard_copy (other: like Current) -- Copy every field of other onto corresponding field -- of current object. require other_not_void: other /= Void type_identity: same_type (other) external "built_in" ensure is_standard_equal: standard_is_equal (other) end frozen clone (other: detachable ANY): like other obsolete "Use `twin' instead. [2017-05-31]" -- Void if other is void; otherwise new object -- equal to other -- -- For non-void other, clone calls copy; -- to change copying/cloning semantics, redefine copy. do if other /= Void then Result := other.twin end ensure instance_free: class equal: Result ~ other end frozen standard_clone (other: detachable ANY): like other obsolete "Use `standard_twin' instead. [2017-05-31]" -- Void if other is void; otherwise new object -- field-by-field identical to other. -- Always uses default copying semantics. do if other /= Void then Result := other.standard_twin end ensure instance_free: class equal: standard_equal (Result, other) end frozen standard_twin: like Current -- New object field-by-field identical to other. -- Always uses default copying semantics. external "built_in" ensure standard_twin_not_void: Result /= Void equal: standard_equal (Result, Current) end frozen deep_twin: like Current -- New object structure recursively duplicated from Current. external "built_in" ensure deep_twin_not_void: Result /= Void deep_equal: deep_equal (Current, Result) end frozen deep_clone (other: detachable ANY): like other obsolete "Use `deep_twin' instead. [2017-05-31]" -- Void if other is void: otherwise, new object structure -- recursively duplicated from the one attached to other do if other /= Void then Result := other.deep_twin end ensure instance_free: class deep_equal: deep_equal (other, Result) end frozen deep_copy (other: like Current) -- Effect equivalent to that of: -- copy (other . deep_twin) require other_not_void: other /= Void do copy (other.deep_twin) ensure deep_equal: deep_equal (Current, other) end feature {NONE} -- Retrieval frozen internal_correct_mismatch -- Called from runtime to perform a proper dynamic dispatch on correct_mismatch -- from MISMATCH_CORRECTOR. local l_msg: STRING_8 l_exc: EXCEPTIONS do if attached {MISMATCH_CORRECTOR} Current as l_corrector then l_corrector.correct_mismatch else create l_msg.make_from_string ("Mismatch: ") create l_exc l_msg.append (generating_type.name) l_exc.raise_retrieval_exception (l_msg) end end feature -- Output Io: STD_FILES -- Handle to standard file setup once create Result Result.set_output_default ensure instance_free: class io_not_void: Result /= Void end out: STRING_8 -- New string containing terse printable representation -- of current object do Result := tagged_out ensure out_not_void: Result /= Void end frozen tagged_out: STRING_8 -- New string containing terse printable representation -- of current object external "built_in" ensure tagged_out_not_void: Result /= Void end print (o: detachable ANY) -- Write terse external representation of o -- on standard output. do if o /= Void then Io.put_string (o.out) end ensure instance_free: class end feature -- Platform Operating_environment: OPERATING_ENVIRONMENT -- Objects available from the operating system once create Result ensure instance_free: class operating_environment_not_void: Result /= Void end feature {NONE} -- Initialization default_create -- Process instances of classes with no creation clause. -- (Default: do nothing.) do end feature -- Basic operations default_rescue -- Process exception for routines with no Rescue clause. -- (Default: do nothing.) do end frozen do_nothing -- Execute a null action. do ensure instance_free: class end frozen default: detachable like Current -- Default value of object's type do end frozen default_pointer: POINTER -- Default value of type POINTER -- (Avoid the need to write p.default for -- some p of type POINTER.) do ensure instance_free: class end frozen as_attached: attached like Current obsolete "Remove calls to this feature. [2017-05-31]" -- Attached version of Current. -- (Can be used during transitional period to convert -- non-void-safe classes to void-safe ones.) do Result := Current end invariant reflexive_equality: standard_is_equal (Current) reflexive_conformance: conforms_to (Current) note copyright: "Copyright (c) 1984-2018, 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 ANY
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