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note description: "[ Objects representing delayed calls to a routine, with some operands possibly still open ]" library: "Free implementation of ELKS library" status: "See notice at end of class." legal: "See notice at end of class." date: "$Date: 2017-06-01 00:24:49 -0700 (Thu, 01 Jun 2017) $" revision: "$Revision: 100440 $" deferred class interface ROUTINE [OPEN_ARGS -> detachable TUPLE create default_create end] feature -- Initialization adapt (other: like Current) -- Initialize from other. -- Useful in descendants. require other_exists: other /= Void conforming: conforms_to (other) feature -- Access generating_type: TYPE [detachable ROUTINE [OPEN_ARGS]] -- 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 hash_code: INTEGER_32 -- Hash code value. ensure -- from HASHABLE good_hash_value: Result >= 0 frozen operands: detachable OPEN_ARGS postcondition (args: like operands): BOOLEAN -- Does current state satisfy routine's -- postcondition for args? precondition (args: like operands): BOOLEAN -- Do args satisfy routine's precondition -- in current state? target: detachable ANY -- Target of call, if already known feature -- Measurement open_count: INTEGER_32 -- Number of open operands. 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) 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 (other: ROUTINE [OPEN_ARGS]): 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) 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 (other: ROUTINE [OPEN_ARGS]): 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 Callable: BOOLEAN = True -- Can routine be called on current object? 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 is_equal (other: like Current): BOOLEAN -- Is associated routine the same as the one -- associated with other. require -- from ANY other_not_void: other /= Void ensure -- from ANY symmetric: Result implies other ~ Current consistent: standard_is_equal (other) implies Result is_hashable: BOOLEAN -- May current object be hashed? -- (True by default.) -- (from HASHABLE) is_target_closed: BOOLEAN -- Is target for current agent closed, i.e. specified at creation time? 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_operands (args: detachable separate TUPLE): BOOLEAN -- Are args valid operands for this routine? valid_target (args: detachable TUPLE): BOOLEAN -- Is the first element of tuple args a valid target feature -- Duplication copy (other: like Current) -- Use same routine as other. require -- from ANY other_not_void: other /= Void type_identity: same_type (other) ensure -- from ANY is_equal: Current ~ other ensure then same_call_status: other.Callable implies Callable frozen deep_copy (other: ROUTINE [OPEN_ARGS]) -- 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: ROUTINE [OPEN_ARGS] -- 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: ROUTINE [OPEN_ARGS]) -- 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: ROUTINE [OPEN_ARGS] -- 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: ROUTINE [OPEN_ARGS] -- 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 apply -- Call routine with operands as last set. require valid_operands: valid_operands (operands) call (args: detachable separate OPEN_ARGS) -- Call routine with args. require valid_operands: valid_operands (args) frozen default: detachable ROUTINE [OPEN_ARGS] -- 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 feature -- Correction correct_mismatch -- Attempt to correct object mismatch using Mismatch_information. Mismatch_information: MISMATCH_INFORMATION -- Original attribute values of mismatched object -- (from MISMATCH_CORRECTOR) feature -- Extended operations flexible_call (a: detachable separate TUPLE) -- Call routine with arguments a. -- Compared to call the type of a may be different from {OPEN_ARGS}. require valid_operands: valid_operands (a) 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 feature -- Settings frozen set_operands (args: detachable OPEN_ARGS) -- Use args as operands for next call. require valid_operands: valid_operands (args) ensure operands_set: (operands /= Void implies (operands ~ args)) or (operands = Void implies (args = Void or else args.is_empty)) set_target (a_target: like target) -- Set a_target as the next target for remaining calls to Current. require a_target_not_void: a_target /= Void is_target_closed: is_target_closed target_not_void: target /= Void same_target_type: attached target as t and then t.same_type (a_target) ensure target_set: target = a_target invariant -- 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 ROUTINE
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