note
	description: "[
		Objects representing delayed calls to a boolean function,
		with some arguments 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 07:24:49 +0000 (Thu, 01 Jun 2017) $"
	revision: "$Revision: 100440 $"

class interface
	PREDICATE [OPEN_ARGS -> detachable TUPLE create default_create end]

create {NONE}
	set_rout_disp (a_rout_disp, a_encaps_rout_disp, a_calc_rout_addr: POINTER; a_routine_id: INTEGER_32; a_open_map: like open_map; a_is_basic, a_is_target_closed: BOOLEAN; a_written_type_id_inline_agent: INTEGER_32; a_closed_operands: TUPLE; a_open_count: INTEGER_32)
			-- Initialize object in workbench mode.
			-- (from ROUTINE)
		require -- from ROUTINE
			a_routine_id_valid: a_routine_id > -1
			target_valid: a_is_target_closed implies valid_target (a_closed_operands)

	set_rout_disp_final (a_rout_disp, a_encaps_rout_disp, a_calc_rout_addr: POINTER; a_closed_operands: TUPLE; a_is_target_closed: BOOLEAN; a_open_count: INTEGER_32)
			-- Initialize object in finalized mode.
			-- (from ROUTINE)
		require -- from ROUTINE
			target_valid: a_is_target_closed implies valid_target (a_closed_operands)

feature -- Initialization

	adapt (other: PREDICATE [OPEN_ARGS])
			-- Initialize from other.
			-- Useful in descendants.
			-- (from ROUTINE)
		require -- from ROUTINE
			other_exists: other /= Void
			conforming: conforms_to (other)
	
feature -- Access

	apply
			-- Call function with operands as last set.
			-- (from FUNCTION)
		require -- from ROUTINE
			valid_operands: valid_operands (operands)

	attached_type (type_id: INTEGER_32): INTEGER_32
			-- Attached version of type_id.
			-- (from REFLECTOR)
		require -- from REFLECTOR
			type_id_nonnegative: type_id >= 0
		ensure -- from REFLECTOR
			instance_free: class
			unchanged_if_attached: is_attached_type (type_id) implies type_id = Result

	Bit_type: INTEGER_32 = 8
			-- This type is obsolete and is not used anymore.
			-- (from REFLECTOR_CONSTANTS)

	Boolean_type: INTEGER_32 = 3
			-- Abstract type ID for predefined type BOOLEAN.
			-- (from REFLECTOR_CONSTANTS)

	call (args: detachable separate OPEN_ARGS)
			-- Call routine with args.
			-- (from FUNCTION)
		require -- from ROUTINE
			valid_operands: valid_operands (args)

	Character_32_type: INTEGER_32 = 12
			-- Abstract type ID for predefined type CHARACTER_32.
			-- Was declared in REFLECTOR_CONSTANTS as synonym of Wide_character_type.
			-- (from REFLECTOR_CONSTANTS)

	Character_8_type: INTEGER_32 = 2
			-- Abstract type ID for predefined type CHARACTER_8.
			-- Was declared in REFLECTOR_CONSTANTS as synonym of Character_type.
			-- (from REFLECTOR_CONSTANTS)

	Character_type: INTEGER_32 = 2
			-- Abstract type ID for predefined type CHARACTER_8.
			-- Was declared in REFLECTOR_CONSTANTS as synonym of Character_8_type.
			-- (from REFLECTOR_CONSTANTS)

	class_name_8_of_type (type_id: INTEGER_32): STRING_8
			-- Name of class associated with dynamic type type_id.
			-- (from REFLECTOR)
		require -- from REFLECTOR
			type_id_nonnegative: type_id >= 0
		ensure -- from REFLECTOR
			instance_free: class

	class_name_of_type (type_id: INTEGER_32): STRING_8
			-- Name of class associated with dynamic type type_id.
			-- (from REFLECTOR)
		require -- from REFLECTOR
			type_id_nonnegative: type_id >= 0
		ensure -- from REFLECTOR
			instance_free: class

	detachable_type (type_id: INTEGER_32): INTEGER_32
			-- Detachable version of type_id.
			-- (from REFLECTOR)
		require -- from REFLECTOR
			type_id_nonnegative: type_id >= 0
		ensure -- from REFLECTOR
			instance_free: class
			unchanged_if_detachable: not is_attached_type (type_id) implies type_id = Result

	Double_type: INTEGER_32 = 6
			-- Abstract type ID for predefined type REAL_64.
			-- Was declared in REFLECTOR_CONSTANTS as synonym of Real_64_type.
			-- (from REFLECTOR_CONSTANTS)

	Expanded_type: INTEGER_32 = 7
			-- Abstract type ID for a non-predefined expanded type.
			-- (from REFLECTOR_CONSTANTS)

	field_name_8_of_type (i: INTEGER_32; type_id: INTEGER_32): STRING_8
			-- Name of i-th field of dynamic type type_id.
			-- (from REFLECTOR)
		require -- from REFLECTOR
			type_id_nonnegative: type_id >= 0
			index_large_enough: i >= 1
			index_small_enought: i <= field_count_of_type (type_id)
		ensure -- from REFLECTOR
			instance_free: class

	field_name_of_type (i: INTEGER_32; type_id: INTEGER_32): STRING_8
			-- Name of i-th field of dynamic type type_id.
			-- (from REFLECTOR)
		require -- from REFLECTOR
			type_id_nonnegative: type_id >= 0
			index_large_enough: i >= 1
			index_small_enought: i <= field_count_of_type (type_id)
		ensure -- from REFLECTOR
			instance_free: class

	field_static_type_of_type (i: INTEGER_32; type_id: INTEGER_32): INTEGER_32
			-- Static type of declared i-th field of dynamic type type_id
			-- (from REFLECTOR)
		require -- from REFLECTOR
			type_id_nonnegative: type_id >= 0
			index_large_enough: i >= 1
			index_small_enough: i <= field_count_of_type (type_id)
		ensure -- from REFLECTOR
			instance_free: class
			field_type_nonnegative: Result >= 0

	field_type_of_type (i: INTEGER_32; type_id: INTEGER_32): INTEGER_32
			-- Abstract type of i-th field of dynamic type type_id
			-- (from REFLECTOR)
		require -- from REFLECTOR
			type_id_nonnegative: type_id >= 0
			index_large_enough: i >= 1
			index_small_enough: i <= field_count_of_type (type_id)
		ensure -- from REFLECTOR
			instance_free: class
			field_type_nonnegative: Result >= 0

	generating_type: TYPE [detachable PREDICATE [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

	generic_count_of_type (type_id: INTEGER_32): INTEGER_32
			-- Number of generic parameter in type_id.
			-- (from REFLECTOR)
		require -- from REFLECTOR
			type_id_nonnegative: type_id >= 0
		ensure -- from REFLECTOR
			instance_free: class

	generic_dynamic_type_of_type (type_id: INTEGER_32; i: INTEGER_32): INTEGER_32
			-- Dynamic type of generic parameter of type_id at position i.
			-- (from REFLECTOR)
		require -- from REFLECTOR
			type_id_nonnegative: type_id >= 0
			type_id_generic: generic_count_of_type (type_id) > 0
			i_valid: i > 0 and i <= generic_count_of_type (type_id)
		ensure -- from REFLECTOR
			instance_free: class
			dynamic_type_nonnegative: Result >= 0

	hash_code: INTEGER_32
			-- Hash code value.
			-- (from ROUTINE)
		ensure -- from HASHABLE
			good_hash_value: Result >= 0

	Integer_16_type: INTEGER_32 = 10
			-- Abstract type ID for predefined type INTEGER_16.
			-- (from REFLECTOR_CONSTANTS)

	Integer_32_type: INTEGER_32 = 4
			-- Abstract type ID for predefined type INTEGER_32.
			-- Was declared in REFLECTOR_CONSTANTS as synonym of Integer_type.
			-- (from REFLECTOR_CONSTANTS)

	Integer_64_type: INTEGER_32 = 11
			-- Abstract type ID for predefined type INTEGER_64.
			-- (from REFLECTOR_CONSTANTS)

	Integer_8_type: INTEGER_32 = 9
			-- Abstract type ID for predefined type INTEGER_8.
			-- (from REFLECTOR_CONSTANTS)

	Integer_type: INTEGER_32 = 4
			-- Abstract type ID for predefined type INTEGER_32.
			-- Was declared in REFLECTOR_CONSTANTS as synonym of Integer_32_type.
			-- (from REFLECTOR_CONSTANTS)

	item alias "()" (args: detachable separate OPEN_ARGS): BOOLEAN
			-- Result of calling function with args as operands.
			-- (from FUNCTION)
		require -- from FUNCTION
			valid_operands: valid_operands (args)

	last_result: BOOLEAN
			-- Result of last call, if any
			-- (from FUNCTION)

	Max_predefined_type: INTEGER_32 = 16
			-- (from REFLECTOR_CONSTANTS)

	Min_predefined_type: INTEGER_32 = -2
			-- (from REFLECTOR_CONSTANTS)

	Natural_16_type: INTEGER_32 = 14
			-- Abstract type ID for predefined type NATURAL_16.
			-- (from REFLECTOR_CONSTANTS)

	Natural_32_type: INTEGER_32 = 15
			-- Abstract type ID for predefined type NATURAL_32.
			-- (from REFLECTOR_CONSTANTS)

	Natural_64_type: INTEGER_32 = 16
			-- Abstract type ID for predefined type NATURAL_64.
			-- (from REFLECTOR_CONSTANTS)

	Natural_8_type: INTEGER_32 = 13
			-- Abstract type ID for predefined type NATURAL_8.
			-- (from REFLECTOR_CONSTANTS)

	None_type: INTEGER_32 = -2
			-- Type ID representation for NONE.
			-- (from REFLECTOR_CONSTANTS)

	frozen operands: detachable OPEN_ARGS
			-- (from ROUTINE)

	Pointer_type: INTEGER_32 = 0
			-- Abstract type ID for predefined type POINTER.
			-- (from REFLECTOR_CONSTANTS)

	postcondition (args: like operands): BOOLEAN
			-- Does current state satisfy routine's
			-- postcondition for args?
			-- (from ROUTINE)

	precondition (args: like operands): BOOLEAN
			-- Do args satisfy routine's precondition
			-- in current state?
			-- (from ROUTINE)

	Real_32_type: INTEGER_32 = 5
			-- Abstract type ID for predefined type REAL_32.
			-- Was declared in REFLECTOR_CONSTANTS as synonym of Real_type.
			-- (from REFLECTOR_CONSTANTS)

	Real_64_type: INTEGER_32 = 6
			-- Abstract type ID for predefined type REAL_64.
			-- Was declared in REFLECTOR_CONSTANTS as synonym of Double_type.
			-- (from REFLECTOR_CONSTANTS)

	Real_type: INTEGER_32 = 5
			-- Abstract type ID for predefined type REAL_32.
			-- Was declared in REFLECTOR_CONSTANTS as synonym of Real_32_type.
			-- (from REFLECTOR_CONSTANTS)

	Reference_type: INTEGER_32 = 1
			-- Abstract type ID for a reference type.
			-- (from REFLECTOR_CONSTANTS)

	storable_version_of_type (a_type_id: INTEGER_32): detachable IMMUTABLE_STRING_8
			-- Storable version if any specified.
			-- (from REFLECTOR)
		require -- from REFLECTOR
			a_type_id_nonnegative: a_type_id >= 0
		ensure -- from REFLECTOR
			instance_free: class

	target: detachable ANY
			-- Target of call, if already known
			-- (from ROUTINE)

	type_name_8_of_type (type_id: INTEGER_32): STRING_8
			-- Name of type_id's generating type (type of which type_id
			-- is a direct instance).
			-- (from REFLECTOR)
		require -- from REFLECTOR
			type_id_nonnegative: type_id >= 0
		ensure -- from REFLECTOR
			instance_free: class

	type_name_of_type (type_id: INTEGER_32): STRING_8
			-- Name of type_id's generating type (type of which type_id
			-- is a direct instance).
			-- (from REFLECTOR)
		require -- from REFLECTOR
			type_id_nonnegative: type_id >= 0
		ensure -- from REFLECTOR
			instance_free: class

	Wide_character_type: INTEGER_32 = 12
			-- Abstract type ID for predefined type CHARACTER_32.
			-- Was declared in REFLECTOR_CONSTANTS as synonym of Character_32_type.
			-- (from REFLECTOR_CONSTANTS)
	
feature -- Measurement

	field_count_of_type (type_id: INTEGER_32): INTEGER_32
			-- Number of logical fields in dynamic type type_id.
			-- (from REFLECTOR)
		require -- from REFLECTOR
			type_id_nonnegative: type_id >= 0
		ensure -- from REFLECTOR
			instance_free: class

	open_count: INTEGER_32
			-- Number of open operands.
			-- (from ROUTINE)

	persistent_field_count_of_type (a_type_id: INTEGER_32): INTEGER_32
			-- Number of logical fields in dynamic type type_id that are not transient.
			-- (from REFLECTOR)
		require -- from REFLECTOR
			a_type_non_negative: a_type_id >= 0
		ensure -- from REFLECTOR
			instance_free: class
	
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 alias "≡≡≡" (other: PREDICATE [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)

	is_equal (other: PREDICATE [OPEN_ARGS]): BOOLEAN
			-- Is associated function the same as the one
			-- associated with other?
			-- (from FUNCTION)
		require -- from ANY
			other_not_void: other /= Void
		ensure -- from ANY
			symmetric: Result implies other ~ Current
			consistent: standard_is_equal (other) implies Result

	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: PREDICATE [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?
			-- (from ROUTINE)

	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_attached_type (a_type_id: INTEGER_32): BOOLEAN
			-- Is a_type_id an attached type?
			-- (from REFLECTOR)
		require -- from REFLECTOR
			a_type_non_negative: a_type_id >= 0
		ensure -- from REFLECTOR
			instance_free: class

	is_field_expanded_of_type (i: INTEGER_32; a_type_id: INTEGER_32): BOOLEAN
			-- Is i-th field of type a_type_id a user-defined expanded attribute?
			-- (from REFLECTOR)
		require -- from REFLECTOR
			a_type_non_negative: a_type_id >= 0
			index_large_enough: i >= 1
			index_small_enough: i <= field_count_of_type (a_type_id)
		ensure -- from REFLECTOR
			instance_free: class

	is_field_transient_of_type (i: INTEGER_32; a_type_id: INTEGER_32): BOOLEAN
			-- Is i-th field of object a transient attribute?
			-- I.e. an attribute that does not need to be stored?
			-- (from REFLECTOR)
		require -- from REFLECTOR
			a_type_non_negative: a_type_id >= 0
			index_large_enough: i >= 1
			index_small_enough: i <= field_count_of_type (a_type_id)
		ensure -- from REFLECTOR
			instance_free: class

	is_hashable: BOOLEAN
			-- May current object be hashed?
			-- (True by default.)
			-- (from HASHABLE)

	is_pre_ecma_mapping_disabled: BOOLEAN
			-- Are we mapping old names to new ECMA names?
			-- False means mapping STRING to STRING_8, INTEGER to INTEGER_32,...
			-- Redefine in descendants of REFLECTOR to modify the behavior of inspection queries of REFLECTOR.
			-- (from REFLECTOR_HELPER)
		ensure -- from REFLECTOR_HELPER
			instance_free: class

	is_special_any_type (type_id: INTEGER_32): BOOLEAN
			-- Is type represented by type_id represent
			-- a SPECIAL [XX] where XX is a reference type.
			-- (from REFLECTOR)
		require -- from REFLECTOR
			type_id_nonnegative: type_id >= 0
		ensure -- from REFLECTOR
			instance_free: class

	is_special_type (type_id: INTEGER_32): BOOLEAN
			-- Is type represented by type_id represent
			-- a SPECIAL [XX] where XX is a reference type
			-- or a basic expanded type (note that user-defined
			-- expanded types are excluded).
			-- (from REFLECTOR)
		require -- from REFLECTOR
			type_id_nonnegative: type_id >= 0
		ensure -- from REFLECTOR
			instance_free: class

	is_target_closed: BOOLEAN
			-- Is target for current agent closed, i.e. specified at creation time?
			-- (from ROUTINE)

	is_tuple_type (type_id: INTEGER_32): BOOLEAN
			-- Is type represented by type_id represent a TUPLE?
			-- (from REFLECTOR)
		require -- from REFLECTOR
			type_id_nonnegative: type_id >= 0
		ensure -- from REFLECTOR
			instance_free: class

	is_valid_type_string (s: READABLE_STRING_GENERAL): BOOLEAN
			-- Is s a valid string representation for a TYPE.
			-- (from REFLECTOR_HELPER)
		ensure -- from REFLECTOR_HELPER
			instance_free: class

	mapped_type (a_type: READABLE_STRING_GENERAL): READABLE_STRING_GENERAL
			-- If is_pre_ecma_mapping_disabled a_type, otherwise
			-- the mapped typed.
			-- (from REFLECTOR_HELPER)
		require -- from REFLECTOR_HELPER
			a_type_not_void: a_type /= Void
		ensure -- from REFLECTOR_HELPER
			instance_free: class
			mapped_type_not_void: Result /= Void

	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?
			-- (from ROUTINE)

	valid_target (args: detachable TUPLE): BOOLEAN
			-- Is the first element of tuple args a valid target
			-- (from ROUTINE)
	
feature -- Removal

	clear_last_result
			-- Reset content of last_result to its default value.
			-- (from FUNCTION)
	
feature -- Duplication

	copy (other: PREDICATE [OPEN_ARGS])
			-- Use same function as other.
			-- (from FUNCTION)
		require -- from ANY
			other_not_void: other /= Void
			type_identity: same_type (other)
		ensure -- from ANY
			is_equal: Current ~ other
		ensure then -- from ROUTINE
			same_call_status: other.Callable implies Callable

	frozen deep_copy (other: PREDICATE [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: PREDICATE [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: PREDICATE [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: PREDICATE [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: PREDICATE [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

	frozen default: detachable PREDICATE [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 -- Conformance

	field_conforms_to (a_source_type, a_field_type: INTEGER_32): BOOLEAN
			-- Does a_source_type conform to a_field_type?
			-- (from REFLECTOR)
		require -- from REFLECTOR
			a_source_type_non_negative: a_source_type >= 0
			a_field_type_non_negative: a_field_type >= 0
		ensure -- from REFLECTOR
			instance_free: class

	type_conforms_to (type1, type2: INTEGER_32): BOOLEAN
			-- Does type1 conform to type2?
			-- (from REFLECTOR)
		require -- from REFLECTOR
			type1_nonnegative: type1 >= 0
			type2_nonnegative: type2 >= 0
		ensure -- from REFLECTOR
			instance_free: class
	
feature -- Correction

	correct_mismatch
			-- Attempt to correct object mismatch using Mismatch_information.
			-- (from ROUTINE)

	Mismatch_information: MISMATCH_INFORMATION
			-- Original attribute values of mismatched object
			-- (from MISMATCH_CORRECTOR)
	
feature -- Creation

	dynamic_type_from_string (class_type: READABLE_STRING_GENERAL): INTEGER_32
			-- Dynamic type corresponding to class_type.
			-- If no dynamic type available, returns -1.
			-- (from REFLECTOR)
		require -- from REFLECTOR
			class_type_not_void: class_type /= Void
			class_type_not_empty: not class_type.is_empty
			is_valid_type_string: is_valid_type_string (class_type)
		ensure -- from REFLECTOR
			instance_free: class
			dynamic_type_from_string_valid: Result = -1 or Result = None_type or Result >= 0

	new_instance_of (type_id: INTEGER_32): ANY
			-- New instance of dynamic type_id.
			-- Note: returned object is not initialized and may
			-- hence violate its invariant.
			-- type_id cannot represent a SPECIAL type, use
			-- new_special_any_instance instead.
			-- (from REFLECTOR)
		require -- from REFLECTOR
			type_id_nonnegative: type_id >= 0
			not_special_type: not is_special_type (type_id)
			not_deferred: not type_of_type (type_id).is_deferred
		ensure -- from REFLECTOR
			instance_free: class
			not_special_type: not attached {SPECIAL [detachable ANY]} Result
			dynamic_type_set: attached_type (Result.generating_type.type_id) = attached_type (type_id)

	new_special_any_instance (type_id, a_capacity: INTEGER_32): SPECIAL [detachable ANY]
			-- New instance of dynamic type_id that represents
			-- a SPECIAL which can contain a_capacity elements of reference type.
			-- To create a SPECIAL of basic type, use class SPECIAL directly.
			-- (from REFLECTOR)
		require -- from REFLECTOR
			a_capacity_valid: a_capacity >= 0
			type_id_nonnegative: type_id >= 0
			special_type: is_special_any_type (type_id)
		ensure -- from REFLECTOR
			instance_free: class
			dynamic_type_set: Result.generating_type.type_id = type_id
			count_set: Result.count = 0
			capacity_set: Result.capacity = a_capacity

	new_tuple_from_special (type_id: INTEGER_32; values: SPECIAL [detachable separate ANY]): detachable TUPLE
			-- New instance of a tuple of type type_id filled with values if all types of items are suitable.
			-- Void if some items from values are inappropriate for a tuple of type type_id.
			-- (from REFLECTOR)
		require -- from REFLECTOR
			type_id_nonnegative: type_id >= 0
			is_tuple_type: is_tuple_type (type_id)
		ensure -- from REFLECTOR
			instance_free: class
			dynamic_type_set: attached Result implies Result.generating_type.type_id = type_id
			values_set: attached Result implies ∀ k: 1 |..| Result.count ¦
					Result.item (k) = values [k - 1]

	new_tuple_from_tuple (type_id: INTEGER_32; source: separate TUPLE): detachable TUPLE
			-- New instance of a tuple of type type_id filled with values fom source if all value types are suitable.
			-- Void if some values from source are inappropriate for a tuple of type type_id.
			-- (from REFLECTOR)
		require -- from REFLECTOR
			type_id_nonnegative: type_id >= 0
			is_tuple_type: is_tuple_type (type_id)
		ensure -- from REFLECTOR
			instance_free: class
			dynamic_type_set: attached Result implies Result.generating_type.type_id = type_id
			object_comparison_set: attached Result implies Result.object_comparison = source.object_comparison
			values_set: attached Result implies ∀ k: 1 |..| Result.count ¦
					Result.item (k) = source [k]

	type_of_type (type_id: INTEGER_32): TYPE [detachable ANY]
			-- Associated TYPE instance for an object of type id type_id
			-- (from REFLECTOR)
		require -- from REFLECTOR
			type_id_nonnegative: type_id >= 0
		ensure -- from REFLECTOR
			instance_free: class
			result_not_void: Result /= Void
	
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}.
			-- (from ROUTINE)
		require -- from ROUTINE
			valid_operands: valid_operands (a)

	flexible_item (a: detachable separate TUPLE): BOOLEAN
			-- Result of calling function with a as arguments.
			-- Compared to item the type of a may be different from {OPEN_ARGS}.
			-- (from FUNCTION)
		require -- from FUNCTION
			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.
			-- (from ROUTINE)
		require -- from ROUTINE
			valid_operands: valid_operands (args)
		ensure -- from ROUTINE
			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.
			-- (from ROUTINE)
		require -- from ROUTINE
			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 -- from ROUTINE
			target_set: target = a_target
	
feature -- Version

	compiler_version: INTEGER_32
			-- (from REFLECTOR)
		ensure -- from REFLECTOR
			instance_free: class
	
invariant
		-- from ANY
	reflexive_equality: standard_is_equal (Current)
	reflexive_conformance: conforms_to (Current)

note
	copyright: "Copyright (c) 1984-2015, 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 PREDICATE

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