-- overloaded entities it points to the parent subprogram of a derived
-- subprogram. In case of abstract interface subprograms it points to the
-- subprogram that covers the abstract interface primitive. Also used for
--- a subprogram renaming, where it points to the renamed subprogram.
--- Always empty for entries.
+-- a subprogram renaming, where it points to the renamed subprogram. For
+-- an inherited operation (of a type extension) that is overridden in a
+-- private part, the Alias is the overriding operation. In this fashion a
+-- call from outside the package ends up executing the new body even if
+-- non-dispatching, and a call from inside calls the overriding operation
+-- because it hides the implicit one. Alias is always empty for entries.
-- Alignment (Uint14)
-- Present in entities for types and also in constants, variables
-- Present in all entities. Set if a pragma Suppress or Unsuppress
-- mentions the entity specifically in the second argument. If this
-- flag is set the Global_Entity_Suppress and Local_Entity_Suppress
--- tables must be consulted to determine if the is actually an active
+-- tables must be consulted to determine if there actually is an active
-- Suppress or Unsuppress pragma that applies to the entity.
-- Class_Wide_Type (Node9)
-- at run-time (this happens if fields of a record have variable
-- lengths). See package Layout for details of these values.
--
--- Note: this field is obsolescent, to be eventually replaced entirely
--- by Normalized_First_Bit and Normalized_Position, but for the moment,
--- gigi is still using (and back annotating) this field, and gigi does
--- not know about the new fields. For the front end layout case, the
--- Component_Bit_Offset field is only set if it is static, and otherwise
--- the new Normalized_First_Bit and Normalized_Position fields are used.
+-- Note: Component_Bit_Offset is redundant with respect to the fields
+-- Normalized_First_Bit and Normalized_Position, and could in principle
+-- be eliminated, but it is convenient in several situations, including
+-- use in Gigi, to have this redundant field.
-- Component_Clause (Node13)
-- Present in record components and discriminants. If a record
--- representation clause is present for the corresponding record
--- type a that specifies a position for the component, then the
--- Component_Clause field of the E_Component entity points to the
--- N_Component_Clause node. Set to Empty if no record representation
--- clause was present, or if there was no specification for this
--- component.
+-- representation clause is present for the corresponding record type a
+-- that specifies a position for the component, then the Component_Clause
+-- field of the E_Component entity points to the N_Component_Clause node.
+-- Set to Empty if no record representation clause was present, or if
+-- there was no specification for this component.
-- Component_Size (Uint22) [implementation base type only]
-- Present in array types. It contains the component size value for
-- Present in all entities. Set true for all entities declared in the
-- private part or body of a package. Also marks generic formals of a
-- formal package declared without a box. For library level entities,
--- this flag is set if the entity is not publicly visible.
+-- this flag is set if the entity is not publicly visible. This flag
+-- is reset when compiling the body of the package where the entity
+-- is declared, when compiling the private part or body of a public
+-- child unit, and when compiling a private child unit (see Install_
+-- Private_Declaration in sem_ch7).
-- Is_Hidden_Open_Scope (Flag171)
-- Present in all entities. Set true for a scope that contains the
-- child unit, or if it is the descendent of a private child unit.
-- Is_Private_Primitive (Flag245)
--- Present in subprograms. Set if the first parameter of the subprogram
--- is of concurrent tagged type with a private view.
+-- Present in subprograms. Set if the operation is a primitive of a
+-- tagged type (procedure or function dispatching on result) whose
+-- full view has not been seen. Used in particular for primitive
+-- subprograms of a synchronized type declared between the two views
+-- of the type, so that the wrapper built for such a subprogram can
+-- be given the proper signature.
-- Is_Private_Type (synthesized)
-- Applies to all entities, true for private types and subtypes,
-- Packed_Array_Type (Node23)
-- Present in array types and subtypes, including the string literal
-- subtype case, if the corresponding type is packed (either bit packed
--- or packed to eliminate holes in non-contiguous enumeration type
--- index types). References the type used to represent the packed array,
--- which is either a modular type for short static arrays, or an
--- array of System.Unsigned. Note that in some situations (internal
--- types, and references to fields of variant records), it is not
--- always possible to construct this type in advance of its use. If
--- Packed_Array_Type is empty, then the necessary type is declared
--- on the fly for each reference to the array.
+-- or packed to eliminate holes in non-contiguous enumeration type index
+-- types). References the type used to represent the packed array, which
+-- is either a modular type for short static arrays, or an array of
+-- System.Unsigned. Note that in some situations (internal types, and
+-- references to fields of variant records), it is not always possible
+-- to construct this type in advance of its use. If Packed_Array_Type
+-- is empty, then the necessary type is declared on the fly for each
+-- reference to the array.
-- Parameter_Mode (synthesized)
-- Applies to formal parameter entities. This is a synonym for Ekind,
-- used when obtaining the formal kind of a formal parameter (the result
-- is one of E_[In/Out/In_Out]_Parameter)
--- Parent_Subtype (Node19)
--- Present in E_Record_Type. Points to the subtype to use for a
--- field that references the parent record.
+-- Parent_Subtype (Node19) [base type only]
+-- Present in E_Record_Type. Set only for derived tagged types, in which
+-- case it points to the subtype of the parent type. This is the type
+-- that is used as the Etype of the _parent field.
-- Postcondition_Proc (Node8)
-- Present only in procedure entities, saves the entity of the generated
-- protected types. Set to the original private component.
-- Private_Dependents (Elist18)
--- Present in private (sub)types. Records the subtypes of the
--- private type, derivations from it, and records and arrays
--- with components dependent on the type.
+-- Present in private (sub)types. Records the subtypes of the private
+-- type, derivations from it, and records and arrays with components
+-- dependent on the type.
--
--- The subtypes are traversed when installing and deinstalling
--- (the full view of) a private type in order to ensure correct
--- view of the subtypes.
+-- The subtypes are traversed when installing and deinstalling (the full
+-- view of) a private type in order to ensure correct view of the
+-- subtypes.
--
-- Used in similar fashion for incomplete types: holds list of subtypes
-- of these incomplete types that have discriminant constraints. The
-- the case of an appearance of a simple variable that is not a renaming
-- as the left side of an assignment in which case Referenced_As_LHS is
-- set instead, or a similar appearance as an out parameter actual, in
--- which case As_Out_Parameter_Parameter is set.
+-- which case Referenced_As_Out_Parameter is set.
-- Referenced_As_LHS (Flag36):
-- Present in all entities. This flag is set instead of Referenced if a
-- Cloned_Subtype (Node16) (subtype case only)
-- First_Entity (Node17)
-- Corresponding_Concurrent_Type (Node18)
- -- Parent_Subtype (Node19)
+ -- Parent_Subtype (Node19) (base type only)
-- Last_Entity (Node20)
-- Discriminant_Constraint (Elist21)
-- Corresponding_Remote_Type (Node22)
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