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<article><h2>Eiffel mode</h2><form><textarea id="code" name="code">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: 2013-01-25 11:49:00 -0800 (Fri, 25 Jan 2013) $" revision: "$Revision: 712 $"
class ANY
feature -- Customization
feature -- Access
generator: STRING -- 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) do Result := {detachable like Current} 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 a): 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 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 a): 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 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 a): 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 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 -- 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'. obsolete "Use `twin' instead." do if other /= Void then Result := other.twin end ensure equal: Result ~ other end
frozen standard_clone (other: detachable ANY): like other -- Void if `other' is void; otherwise new object -- field-by-field identical to `other'. -- Always uses default copying semantics. obsolete "Use `standard_twin' instead." do if other /= Void then Result := other.standard_twin end ensure 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 -- Void if `other' is void: otherwise, new object structure -- recursively duplicated from the one attached to `other' obsolete "Use `deep_twin' instead." do if other /= Void then Result := other.deep_twin end ensure 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 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 io_not_void: Result /= Void end
out: STRING -- New string containing terse printable representation -- of current object do Result := tagged_out ensure out_not_void: Result /= Void end
frozen tagged_out: STRING -- 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 end
feature -- Platform
Operating_environment: OPERATING_ENVIRONMENT -- Objects available from the operating system once create Result ensure 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 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 -- Result = Result.default end
frozen as_attached: attached like Current -- 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) 1984-2012, 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
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