indexing
	description: "[
		Access to internal object properties.
		This class may be used as ancestor by classes needing its facilities.
	]"
	legal: "See notice at end of class."
	status: "See notice at end of class."
	date: "$Date: 2006-07-23 22:41:16 -0700 (Sun, 23 Jul 2006) $"
	revision: "$Revision: 61569 $"

class interface
	INTERNAL

create 
	default_create
			-- Process instances of classes with no creation clause.
			-- (Default: do nothing.)
			-- (from ANY)

feature -- Access

	bit_type: INTEGER_32 is 8

	boolean_field (i: INTEGER_32; object: ANY): BOOLEAN
			-- Boolean value of `i'-th field of `object'
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			boolean_field: field_type (i, object) = boolean_type

	boolean_type: INTEGER_32 is 3

	character_32_type: INTEGER_32 is 12
			-- Was declared in INTERNAL as synonym of Wide_character_type.

	character_8_type: INTEGER_32 is 2
			-- Was declared in INTERNAL as synonym of Character_type.

	character_field (i: INTEGER_32; object: ANY): CHARACTER_8
			-- Character value of `i'-th field of `object'
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			character_field: field_type (i, object) = character_type

	character_type: INTEGER_32 is 2
			-- Was declared in INTERNAL as synonym of Character_8_type.

	class_name (object: ANY): STRING_8
			-- Name of the class associated with `object'
		require
			object_not_void: object /= Void

	class_name_of_type (type_id: INTEGER_32): STRING_8
			-- Name of class associated with dynamic type `type_id'.
		require
			type_id_nonnegative: type_id >= 0

	double_field (i: INTEGER_32; object: ANY): REAL_64
			-- Double precision value of `i'-th field of `object'
			-- Was declared in INTERNAL as synonym of real_64_field.
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			real_64_field: field_type (i, object) = real_64_type

	double_type: INTEGER_32 is 6
			-- Was declared in INTERNAL as synonym of Real_64_type.

	dynamic_type (object: ANY): INTEGER_32
			-- Dynamic type of `object'
		require
			object_not_void: object /= Void
		ensure
			dynamic_type_nonnegative: Result >= 0

	expanded_field_type (i: INTEGER_32; object: ANY): STRING_8
			-- Class name associated with the `i'-th
			-- expanded field of `object'
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			is_expanded: field_type (i, object) = expanded_type
		ensure
			result_exists: Result /= Void

	expanded_type: INTEGER_32 is 7

	field (i: INTEGER_32; object: ANY): ANY
			-- Object attached to the `i'-th field of `object'
			-- (directly or through a reference)
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			not_special: not is_special (object)

	field_name (i: INTEGER_32; object: ANY): STRING_8
			-- Name of `i'-th field of `object'
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			not_special: not is_special (object)
		ensure
			result_exists: Result /= Void

	field_name_of_type (i: INTEGER_32; type_id: INTEGER_32): STRING_8
			-- Name of `i'-th field of dynamic type `type_id'.
		require
			type_id_nonnegative: type_id >= 0
			index_large_enough: i >= 1
			index_small_enought: i <= field_count_of_type (type_id)

	field_offset (i: INTEGER_32; object: ANY): INTEGER_32
			-- Offset of `i'-th field of `object'
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			not_special: not is_special (object)

	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'
		require
			type_id_nonnegative: type_id >= 0
			index_large_enough: i >= 1
			index_small_enough: i <= field_count_of_type (type_id)
		ensure
			field_type_nonnegative: Result >= 0

	field_type (i: INTEGER_32; object: ANY): INTEGER_32
			-- Abstract type of `i'-th field of `object'
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
		ensure
			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'
		require
			type_id_nonnegative: type_id >= 0
			index_large_enough: i >= 1
			index_small_enough: i <= field_count_of_type (type_id)
		ensure
			field_type_nonnegative: Result >= 0

	generating_type: STRING_8
			-- Name of current object's generating type
			-- (type of which it is a direct instance)
			-- (from ANY)

	generator: STRING_8
			-- Name of current object's generating class
			-- (base class of the type of which it is a direct instance)
			-- (from ANY)

	generic_count (obj: ANY): INTEGER_32
			-- Number of generic parameter in `obj'.
		require
			obj_not_void: obj /= Void

	generic_count_of_type (type_id: INTEGER_32): INTEGER_32
			-- Number of generic parameter in `type_id'.
		require
			type_id_nonnegative: type_id >= 0

	generic_dynamic_type (object: ANY; i: INTEGER_32): INTEGER_32
			-- Dynamic type of generic parameter of `object' at
			-- position `i'.
		require
			object_not_void: object /= Void
			object_generic: generic_count (object) > 0
			i_valid: i > 0 and i <= generic_count (object)
		ensure
			dynamic_type_nonnegative: Result >= 0

	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'.
		require
			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
			dynamic_type_nonnegative: Result >= 0

	integer_16_field (i: INTEGER_32; object: ANY): INTEGER_16
			-- INTEGER_16 value of `i'-th field of `object'
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			integer_16_field: field_type (i, object) = integer_16_type

	integer_16_type: INTEGER_32 is 10

	integer_32_field (i: INTEGER_32; object: ANY): INTEGER_32
			-- INTEGER_32 value of `i'-th field of `object'
			-- Was declared in INTERNAL as synonym of integer_field.
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			integer_32_field: field_type (i, object) = integer_32_type

	integer_32_type: INTEGER_32 is 4
			-- Was declared in INTERNAL as synonym of Integer_type.

	integer_64_field (i: INTEGER_32; object: ANY): INTEGER_64
			-- INTEGER_64 value of `i'-th field of `object'
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			integer_64_field: field_type (i, object) = integer_64_type

	integer_64_type: INTEGER_32 is 11

	integer_8_field (i: INTEGER_32; object: ANY): INTEGER_8
			-- INTEGER_8 value of `i'-th field of `object'
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			integer_8_field: field_type (i, object) = integer_8_type

	integer_8_type: INTEGER_32 is 9

	integer_field (i: INTEGER_32; object: ANY): INTEGER_32
			-- INTEGER_32 value of `i'-th field of `object'
			-- Was declared in INTERNAL as synonym of integer_32_field.
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			integer_32_field: field_type (i, object) = integer_32_type

	integer_type: INTEGER_32 is 4
			-- Was declared in INTERNAL as synonym of Integer_32_type.

	max_predefined_type: INTEGER_32 is 16

	natural_16_field (i: INTEGER_32; object: ANY): NATURAL_16
			-- NATURAL_16 value of `i'-th field of `object'
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			natural_16_field: field_type (i, object) = natural_16_type

	natural_16_type: INTEGER_32 is 14

	natural_32_field (i: INTEGER_32; object: ANY): NATURAL_32
			-- NATURAL_32 value of `i'-th field of `object'
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			natural_32_field: field_type (i, object) = natural_32_type

	natural_32_type: INTEGER_32 is 15

	natural_64_field (i: INTEGER_32; object: ANY): NATURAL_64
			-- NATURAL_64 value of `i'-th field of `object'
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			natural_64_field: field_type (i, object) = natural_64_type

	natural_64_type: INTEGER_32 is 16

	natural_8_field (i: INTEGER_32; object: ANY): NATURAL_8
			-- NATURAL_8 value of `i'-th field of `object'
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			natural_8_field: field_type (i, object) = natural_8_type

	natural_8_type: INTEGER_32 is 13

	none_type: INTEGER_32 is -2
			-- Type ID representation for NONE.

	pointer_field (i: INTEGER_32; object: ANY): POINTER
			-- Pointer value of `i'-th field of `object'
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			pointer_field: field_type (i, object) = pointer_type

	pointer_type: INTEGER_32 is 0

	real_32_field (i: INTEGER_32; object: ANY): REAL_32
			-- Real value of `i'-th field of `object'
			-- Was declared in INTERNAL as synonym of real_field.
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			real_32_field: field_type (i, object) = real_32_type

	real_32_type: INTEGER_32 is 5
			-- Was declared in INTERNAL as synonym of Real_type.

	real_64_field (i: INTEGER_32; object: ANY): REAL_64
			-- Double precision value of `i'-th field of `object'
			-- Was declared in INTERNAL as synonym of double_field.
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			real_64_field: field_type (i, object) = real_64_type

	real_64_type: INTEGER_32 is 6
			-- Was declared in INTERNAL as synonym of Double_type.

	real_field (i: INTEGER_32; object: ANY): REAL_32
			-- Real value of `i'-th field of `object'
			-- Was declared in INTERNAL as synonym of real_32_field.
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			real_32_field: field_type (i, object) = real_32_type

	real_type: INTEGER_32 is 5
			-- Was declared in INTERNAL as synonym of Real_32_type.

	reference_type: INTEGER_32 is 1

	type_name (object: ANY): STRING_8
			-- Name of `object''s generating type (type of which `object'
			-- is a direct instance).
		require
			object_not_void: object /= Void

	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).
		require
			type_id_nonnegative: type_id >= 0

	wide_character_type: INTEGER_32 is 12
			-- Was declared in INTERNAL as synonym of Character_32_type.
	
feature -- Measurement

	bit_size (i: INTEGER_32; object: ANY): INTEGER_32
			-- Size (in bit) of the `i'-th bit field of `object'
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			is_bit: field_type (i, object) = bit_type
		ensure
			positive_result: Result > 0

	field_count (object: ANY): INTEGER_32
			-- Number of logical fields in `object'
		require
			object_not_void: object /= Void

	field_count_of_type (type_id: INTEGER_32): INTEGER_32
			-- Number of logical fields in dynamic type `type_id'.
		require
			type_id_nonnegative: type_id >= 0

	physical_size (object: ANY): INTEGER_32
			-- Space occupied by `object' in bytes
		require
			object_not_void: object /= Void
	
feature -- Comparison

	frozen deep_equal (some: ANY; other: like arg #1): BOOLEAN
			-- Are `some' and `other' either both void
			-- or attached to isomorphic object structures?
			-- (from ANY)
		ensure -- from ANY
			shallow_implies_deep: standard_equal (some, other) implies Result
			both_or_none_void: (some = Void) implies (Result = (other = Void))
			same_type: (Result and (some /= Void)) implies some.same_type (other)
			symmetric: Result implies deep_equal (other, some)

	frozen equal (some: ANY; other: like arg #1): BOOLEAN
			-- Are `some' and `other' either both void or attached
			-- to objects considered equal?
			-- (from ANY)
		ensure -- from ANY
			definition: Result = (some = Void and other = Void) or else ((some /= Void and other /= Void) and then some.is_equal (other))

	is_equal (other: like Current): 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.is_equal (Current)
			consistent: standard_is_equal (other) implies Result

	frozen standard_equal (some: ANY; other: like arg #1): BOOLEAN
			-- Are `some' and `other' 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
			definition: Result = (some = Void and other = Void) or else ((some /= Void and other /= Void) and then some.standard_is_equal (other))

	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?
			-- (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

	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_marked (obj: ANY): BOOLEAN
			-- Is `obj' marked?
		require
			object_exists: obj /= Void

	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,...
			-- (from INTERNAL_HELPER)

	is_special (object: ANY): BOOLEAN
			-- Is `object' a special object?
		require
			object_not_void: object /= Void

	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.
		require
			type_id_nonnegative: type_id >= 0

	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 type.
		require
			type_id_nonnegative: type_id >= 0

	is_tuple (object: ANY): BOOLEAN
			-- Is `object' a TUPLE object?
		require
			object_not_void: object /= Void

	is_tuple_type (type_id: INTEGER_32): BOOLEAN
			-- Is type represented by `type_id' represent a TUPLE?
		require
			type_id_nonnegative: type_id >= 0

	is_valid_type_string (s: STRING_8): BOOLEAN
			-- Is `s' a valid string representation for a TYPE.
			-- (from INTERNAL_HELPER)
		require -- from INTERNAL_HELPER
			s_not_void: s /= Void
			s_not_empty: not s.is_empty

	mapped_type (a_type: STRING_8): STRING_8
			-- If is_pre_ecma_mapping_disabled `a_type', otherwise
			-- the mapped typed.
			-- (from INTERNAL_HELPER)
		require -- from INTERNAL_HELPER
			a_type_not_void: a_type /= Void
		ensure -- from INTERNAL_HELPER
			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))
	
feature -- Status setting

	disable_pre_ecma_mapping
			-- Set is_pre_ecma_mapping_disabled to True.
			-- (from INTERNAL_HELPER)
		ensure -- from INTERNAL_HELPER
			is_pre_ecma_mapping_disabled_set: is_pre_ecma_mapping_disabled

	enable_pre_ecma_mapping
			-- Set is_pre_ecma_mapping_disabled to False.
			-- (from INTERNAL_HELPER)
		ensure -- from INTERNAL_HELPER
			is_pre_ecma_mapping_disabled_set: not is_pre_ecma_mapping_disabled
	
feature -- Element change

	set_boolean_field (i: INTEGER_32; object: ANY; value: BOOLEAN)
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			boolean_field: field_type (i, object) = boolean_type

	set_character_field (i: INTEGER_32; object: ANY; value: CHARACTER_8)
			-- Set character value of `i'-th field of `object' to `value'
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			character_field: field_type (i, object) = character_type

	set_double_field (i: INTEGER_32; object: ANY; value: REAL_64)
			-- Was declared in INTERNAL as synonym of set_real_64_field.
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			real_64_field: field_type (i, object) = real_64_type

	set_integer_16_field (i: INTEGER_32; object: ANY; value: INTEGER_16)
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			integer_16_field: field_type (i, object) = integer_16_type

	set_integer_32_field (i: INTEGER_32; object: ANY; value: INTEGER_32)
			-- Was declared in INTERNAL as synonym of set_integer_field.
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			integer_32_field: field_type (i, object) = integer_32_type

	set_integer_64_field (i: INTEGER_32; object: ANY; value: INTEGER_64)
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			integer_64_field: field_type (i, object) = integer_64_type

	set_integer_8_field (i: INTEGER_32; object: ANY; value: INTEGER_8)
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			integer_8_field: field_type (i, object) = integer_8_type

	set_integer_field (i: INTEGER_32; object: ANY; value: INTEGER_32)
			-- Was declared in INTERNAL as synonym of set_integer_32_field.
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			integer_32_field: field_type (i, object) = integer_32_type

	set_natural_16_field (i: INTEGER_32; object: ANY; value: NATURAL_16)
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			natural_16_field: field_type (i, object) = natural_16_type

	set_natural_32_field (i: INTEGER_32; object: ANY; value: NATURAL_32)
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			natural_32_field: field_type (i, object) = natural_32_type

	set_natural_64_field (i: INTEGER_32; object: ANY; value: NATURAL_64)
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			natural_64_field: field_type (i, object) = natural_64_type

	set_natural_8_field (i: INTEGER_32; object: ANY; value: NATURAL_8)
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			natural_8_field: field_type (i, object) = natural_8_type

	set_pointer_field (i: INTEGER_32; object: ANY; value: POINTER)
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			pointer_field: field_type (i, object) = pointer_type

	set_real_32_field (i: INTEGER_32; object: ANY; value: REAL_32)
			-- Was declared in INTERNAL as synonym of set_real_field.
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			real_32_field: field_type (i, object) = real_32_type

	set_real_64_field (i: INTEGER_32; object: ANY; value: REAL_64)
			-- Was declared in INTERNAL as synonym of set_double_field.
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			real_64_field: field_type (i, object) = real_64_type

	set_real_field (i: INTEGER_32; object: ANY; value: REAL_32)
			-- Was declared in INTERNAL as synonym of set_real_32_field.
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			real_32_field: field_type (i, object) = real_32_type

	set_reference_field (i: INTEGER_32; object: ANY; value: ANY)
		require
			object_not_void: object /= Void
			index_large_enough: i >= 1
			index_small_enough: i <= field_count (object)
			reference_field: field_type (i, object) = reference_type
			value_conforms_to_field_static_type: value /= Void implies type_conforms_to (dynamic_type (value), field_static_type_of_type (i, dynamic_type (object)))
	
feature -- Duplication

	copy (other: like Current)
			-- 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: is_equal (other)

	frozen deep_copy (other: like Current)
			-- 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: like Current
			-- New object structure recursively duplicated from Current.
			-- (from ANY)
		ensure -- from ANY
			deep_equal: deep_equal (Current, Result)

	frozen standard_copy (other: like Current)
			-- 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: like Current
			-- 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: like Current
			-- New object equal to `Current'
			-- twin calls copy; to change copying/twining semantics, redefine copy.
			-- (from ANY)
		ensure -- from ANY
			twin_not_void: Result /= Void
			is_equal: Result.is_equal (Current)
	
feature -- Basic operations

	frozen default: like Current
			-- 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)

	default_rescue
			-- Process exception for routines with no Rescue clause.
			-- (Default: do nothing.)
			-- (from ANY)

	frozen do_nothing
			-- Execute a null action.
			-- (from ANY)
	
feature -- Conformance

	is_instance_of (object: ANY; type_id: INTEGER_32): BOOLEAN
			-- Is `object' an instance of type `type_id'?
		require
			object_not_void: object /= Void
			type_id_nonnegative: type_id >= 0

	type_conforms_to (type1, type2: INTEGER_32): BOOLEAN
			-- Does `type1' conform to `type2'?
		require
			type1_nonnegative: type1 >= 0
			type2_nonnegative: type2 >= 0
	
feature -- Creation

	dynamic_type_from_string (class_type: STRING_8): INTEGER_32
			-- Dynamic type corresponding to `class_type'.
			-- If no dynamic type available, returns -1.
		require
			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
			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.
		require
			type_id_nonnegative: type_id >= 0
			not_special_type: not is_special_type (type_id)
		ensure
			not_special_type: not is_special (Result)
			dynamic_type_set: dynamic_type (Result) = type_id

	new_special_any_instance (type_id, count: INTEGER_32): SPECIAL [ANY]
			-- New instance of dynamic `type_id' that represents
			-- a SPECIAL with `count' element. To create a SPECIAL of
			-- basic type, use `SPECIAL'.
		require
			count_valid: count >= 0
			type_id_nonnegative: type_id >= 0
			special_type: is_special_any_type (type_id)
		ensure
			special_type: is_special (Result)
			dynamic_type_set: dynamic_type (Result) = type_id
			count_set: Result.count = count
	
feature -- Marking

	lock_marking
			-- Get a lock on mark and unmark routine so that 2 threads cannot mark and
			-- unmark at the same time.

	mark (obj: ANY)
			-- Mark object `obj'.
			-- To be thread safe, make sure to call this feature when you
			-- have the marking lock that you acquire using lock_marking.
		require
			object_not_void: obj /= Void
			object_not_marked: not is_marked (obj)
		ensure
			is_marked: is_marked (obj)

	unlock_marking
			-- Release a lock on mark and unmark, so that another thread can
			-- use mark and unmark.

	unmark (obj: ANY)
			-- Unmark object `obj'.
			-- To be thread safe, make sure to call this feature when you
			-- have the marking lock that you acquire using lock_marking.
		require
			object_not_void: obj /= Void
			object_marked: is_marked (obj)
		ensure
			is_not_marked: not is_marked (obj)
	
feature -- Output

	io: STD_FILES
			-- Handle to standard file setup
			-- (from ANY)

	out: STRING_8
			-- New string containing terse printable representation
			-- of current object
			-- Was declared in ANY as synonym of tagged_out.
			-- (from ANY)

	print (some: ANY)
			-- Write terse external representation of `some'
			-- on standard output.
			-- (from ANY)

	frozen tagged_out: STRING_8
			-- New string containing terse printable representation
			-- of current object
			-- Was declared in ANY as synonym of out.
			-- (from ANY)
	
feature -- Platform

	operating_environment: OPERATING_ENVIRONMENT
			-- Objects available from the operating system
			-- (from ANY)
	
feature -- Version

	compiler_version: INTEGER_32
	
invariant
		-- from ANY
	reflexive_equality: standard_is_equal (Current)
	reflexive_conformance: conforms_to (Current)

indexing
	library: "EiffelBase: Library of reusable components for Eiffel."
	copyright: "Copyright (c) 1984-2006, Eiffel Software and others"
	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
	source: "[
		Eiffel Software
		356 Storke Road, 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 INTERNAL