note description: "[ Access to internal object properties. This class may be used as ancestor by classes needing its facilities. ]" library: "Free implementation of ELKS library" status: "See notice at end of class." legal: "See notice at end of class." date: "$Date: 2020-05-19 14:25:56 +0000 (Tue, 19 May 2020) $" revision: "$Revision: 104258 $" class interface REFLECTOR create default_create feature -- Conformance type_conforms_to (type1, type2: INTEGER_32): BOOLEAN -- Does type1 conform to type2? require type1_nonnegative: type1 >= 0 type2_nonnegative: type2 >= 0 ensure instance_free: class field_conforms_to (a_source_type, a_field_type: INTEGER_32): BOOLEAN -- Does a_source_type conform to a_field_type? require a_source_type_non_negative: a_source_type >= 0 a_field_type_non_negative: a_field_type >= 0 ensure instance_free: class 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. 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 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. require 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 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. require a_capacity_valid: a_capacity >= 0 type_id_nonnegative: type_id >= 0 special_type: is_special_any_type (type_id) ensure 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. require type_id_nonnegative: type_id >= 0 is_tuple_type: is_tuple_type (type_id) ensure 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. require type_id_nonnegative: type_id >= 0 is_tuple_type: is_tuple_type (type_id) ensure 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 require type_id_nonnegative: type_id >= 0 ensure instance_free: class result_not_void: Result /= Void feature -- Status report 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 ensure 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). require type_id_nonnegative: type_id >= 0 ensure instance_free: class is_tuple_type (type_id: INTEGER_32): BOOLEAN -- Is type represented by type_id represent a TUPLE? require type_id_nonnegative: type_id >= 0 ensure instance_free: class is_attached_type (a_type_id: INTEGER_32): BOOLEAN -- Is a_type_id an attached type? require a_type_non_negative: a_type_id >= 0 ensure 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? require 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 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? require 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 instance_free: class feature -- Access 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 ensure instance_free: class class_name_8_of_type (type_id: INTEGER_32): STRING_8 -- Name of class associated with dynamic type type_id. require type_id_nonnegative: type_id >= 0 ensure 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). require type_id_nonnegative: type_id >= 0 ensure instance_free: class 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). require type_id_nonnegative: type_id >= 0 ensure instance_free: class attached_type (type_id: INTEGER_32): INTEGER_32 -- Attached version of type_id. require type_id_nonnegative: type_id >= 0 ensure instance_free: class unchanged_if_attached: is_attached_type (type_id) implies type_id = Result detachable_type (type_id: INTEGER_32): INTEGER_32 -- Detachable version of type_id. require type_id_nonnegative: type_id >= 0 ensure instance_free: class unchanged_if_detachable: not is_attached_type (type_id) implies type_id = Result generic_count_of_type (type_id: INTEGER_32): INTEGER_32 -- Number of generic parameter in type_id. require type_id_nonnegative: type_id >= 0 ensure 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. 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 instance_free: class dynamic_type_nonnegative: Result >= 0 storable_version_of_type (a_type_id: INTEGER_32): detachable IMMUTABLE_STRING_8 -- Storable version if any specified. require a_type_id_nonnegative: a_type_id >= 0 ensure 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. require type_id_nonnegative: type_id >= 0 index_large_enough: i >= 1 index_small_enought: i <= field_count_of_type (type_id) ensure instance_free: class field_name_8_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) ensure instance_free: class 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 instance_free: class field_type_nonnegative: Result >= 0 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 instance_free: class field_type_nonnegative: Result >= 0 feature -- Version compiler_version: INTEGER_32 ensure instance_free: class feature -- Measurement 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 ensure instance_free: class 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. require a_type_non_negative: a_type_id >= 0 ensure instance_free: class note copyright: "Copyright (c) 1984-2020, 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 REFLECTOR
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