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author	kono
date	Fri, 27 Oct 2017 22:46:09 +0900
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children	84e7813d76e9

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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                             S E M _ U T I L                              --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 1992-2017, Free Software Foundation, Inc.         --
+--                                                                          --
+-- GNAT is free software;  you can  redistribute it  and/or modify it under --
+-- terms of the  GNU General Public License as published  by the Free Soft- --
+-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
+-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
+-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
+-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
+-- for  more details.  You should have  received  a copy of the GNU General --
+-- Public License  distributed with GNAT; see file COPYING3.  If not, go to --
+-- http://www.gnu.org/licenses for a complete copy of the license.          --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc.      --
+--                                                                          --
+------------------------------------------------------------------------------
+--  Package containing utility procedures used throughout the semantics
+with Einfo;   use Einfo;
+with Exp_Tss; use Exp_Tss;
+with Namet;   use Namet;
+with Opt;     use Opt;
+with Snames;  use Snames;
+with Types;   use Types;
+with Uintp;   use Uintp;
+with Urealp;  use Urealp;
+package Sem_Util is
+function Abstract_Interface_List (Typ : Entity_Id) return List_Id;
+--  The list of interfaces implemented by Typ. Empty if there are none,
+--  including the cases where there can't be any because e.g. the type is
+--  not tagged.
+procedure Add_Access_Type_To_Process (E : Entity_Id; A : Entity_Id);
+--  Add A to the list of access types to process when expanding the
+--  freeze node of E.
+procedure Add_Block_Identifier (N : Node_Id; Id : out Entity_Id);
+--  Given a block statement N, generate an internal E_Block label and make
+--  it the identifier of the block. Id denotes the generated entity. If the
+--  block already has an identifier, Id returns the entity of its label.
+procedure Add_Global_Declaration (N : Node_Id);
+--  These procedures adds a declaration N at the library level, to be
+--  elaborated before any other code in the unit. It is used for example
+--  for the entity that marks whether a unit has been elaborated. The
+--  declaration is added to the Declarations list of the Aux_Decls_Node
+--  for the current unit. The declarations are added in the current scope,
+--  so the caller should push a new scope as required before the call.
+function Add_Suffix (E : Entity_Id; Suffix : Character) return Name_Id;
+--  Returns the name of E adding Suffix
+function Address_Integer_Convert_OK (T1, T2 : Entity_Id) return Boolean;
+--  Given two types, returns True if we are in Allow_Integer_Address mode
+--  and one of the types is (a descendant of) System.Address (and this type
+--  is private), and the other type is any integer type.
+function Address_Value (N : Node_Id) return Node_Id;
+--  Return the underlying value of the expression N of an address clause
+function Addressable (V : Uint) return Boolean;
+function Addressable (V : Int)  return Boolean;
+pragma Inline (Addressable);
+--  Returns True if the value of V is the word size or an addressable factor
+--  of the word size (typically 8, 16, 32 or 64).
+procedure Aggregate_Constraint_Checks
+(Exp       : Node_Id;
+Check_Typ : Entity_Id);
+--  Checks expression Exp against subtype Check_Typ. If Exp is an aggregate
+--  and Check_Typ a constrained record type with discriminants, we generate
+--  the appropriate discriminant checks. If Exp is an array aggregate then
+--  emit the appropriate length checks. If Exp is a scalar type, or a string
+--  literal, Exp is changed into Check_Typ'(Exp) to ensure that range checks
+--  are performed at run time. Also used for expressions in the argument of
+--  'Update, which shares some of the features of an aggregate.
+function Alignment_In_Bits (E : Entity_Id) return Uint;
+--  If the alignment of the type or object E is currently known to the
+--  compiler, then this function returns the alignment value in bits.
+--  Otherwise Uint_0 is returned, indicating that the alignment of the
+--  entity is not yet known to the compiler.
+function All_Composite_Constraints_Static (Constr : Node_Id) return Boolean;
+--  Used to implement pragma Restrictions (No_Dynamic_Sized_Objects).
+--  Given a constraint or subtree of a constraint on a composite
+--  subtype/object, returns True if there are no nonstatic constraints,
+--  which might cause objects to be created with dynamic size.
+--  Called for subtype declarations (including implicit ones created for
+--  subtype indications in object declarations, as well as discriminated
+--  record aggregate cases). For record aggregates, only records containing
+--  discriminant-dependent arrays matter, because the discriminants must be
+--  static when governing a variant part. Access discriminants are
+--  irrelevant. Also called for array aggregates, but only named notation,
+--  because those are the only dynamic cases.
+procedure Append_Entity_Name (Buf : in out Bounded_String; E : Entity_Id);
+--  Recursive procedure to construct string for qualified name of enclosing
+--  program unit. The qualification stops at an enclosing scope has no
+--  source name (block or loop). If entity is a subprogram instance, skip
+--  enclosing wrapper package. The name is appended to Buf.
+procedure Append_Inherited_Subprogram (S : Entity_Id);
+--  If the parent of the operation is declared in the visible part of
+--  the current scope, the inherited operation is visible even though the
+--  derived type that inherits the operation may be completed in the private
+--  part of the current package.
+procedure Apply_Compile_Time_Constraint_Error
+(N      : Node_Id;
+Msg    : String;
+Reason : RT_Exception_Code;
+Ent    : Entity_Id  := Empty;
+Typ    : Entity_Id  := Empty;
+Loc    : Source_Ptr := No_Location;
+Rep    : Boolean    := True;
+Warn   : Boolean    := False);
+--  N is a subexpression which will raise constraint error when evaluated
+--  at runtime. Msg is a message that explains the reason for raising the
+--  exception. The last character is ? if the message is always a warning,
+--  even in Ada 95, and is not a ? if the message represents an illegality
+--  (because of violation of static expression rules) in Ada 95 (but not
+--  in Ada 83). Typically this routine posts all messages at the Sloc of
+--  node N. However, if Loc /= No_Location, Loc is the Sloc used to output
+--  the message. After posting the appropriate message, and if the flag
+--  Rep is set, this routine replaces the expression with an appropriate
+--  N_Raise_Constraint_Error node using the given Reason code. This node
+--  is then marked as being static if the original node is static, but
+--  sets the flag Raises_Constraint_Error, preventing further evaluation.
+--  The error message may contain a } or & insertion character. This
+--  normally references Etype (N), unless the Ent argument is given
+--  explicitly, in which case it is used instead. The type of the raise
+--  node that is built is normally Etype (N), but if the Typ parameter
+--  is present, this is used instead. Warn is normally False. If it is
+--  True then the message is treated as a warning even though it does
+--  not end with a ? (this is used when the caller wants to parameterize
+--  whether an error or warning is given), or when the message should be
+--  treated as a warning even when SPARK_Mode is On (which otherwise would
+--  force an error).
+function Async_Readers_Enabled (Id : Entity_Id) return Boolean;
+--  Given the entity of an abstract state or a variable, determine whether
+--  Id is subject to external property Async_Readers and if it is, the
+--  related expression evaluates to True.
+function Async_Writers_Enabled (Id : Entity_Id) return Boolean;
+--  Given the entity of an abstract state or a variable, determine whether
+--  Id is subject to external property Async_Writers and if it is, the
+--  related expression evaluates to True.
+function Available_Full_View_Of_Component (T : Entity_Id) return Boolean;
+--  If at the point of declaration an array type has a private or limited
+--  component, several array operations are not available on the type, and
+--  the array type is flagged accordingly. If in the immediate scope of
+--  the array type the component becomes non-private or non-limited, these
+--  operations become available. This can happen if the scopes of both types
+--  are open, and the scope of the array is not outside the scope of the
+--  component.
+procedure Bad_Attribute
+(N    : Node_Id;
+Nam  : Name_Id;
+Warn : Boolean := False);
+--  Called when node N is expected to contain a valid attribute name, and
+--  Nam is found instead. If Warn is set True this is a warning, else this
+--  is an error.
+procedure Bad_Predicated_Subtype_Use
+(Msg            : String;
+N              : Node_Id;
+Typ            : Entity_Id;
+Suggest_Static : Boolean := False);
+--  This is called when Typ, a predicated subtype, is used in a context
+--  which does not allow the use of a predicated subtype. Msg is passed to
+--  Error_Msg_FE to output an appropriate message using N as the location,
+--  and Typ as the entity. The caller must set up any insertions other than
+--  the & for the type itself. Note that if Typ is a generic actual type,
+--  then the message will be output as a warning, and a raise Program_Error
+--  is inserted using Insert_Action with node N as the insertion point. Node
+--  N also supplies the source location for construction of the raise node.
+--  If Typ does not have any predicates, the call has no effect. Set flag
+--  Suggest_Static when the context warrants an advice on how to avoid the
+--  use error.
+function Bad_Unordered_Enumeration_Reference
+(N : Node_Id;
+T : Entity_Id) return Boolean;
+--  Node N contains a potentially dubious reference to type T, either an
+--  explicit comparison, or an explicit range. This function returns True
+--  if the type T is an enumeration type for which No pragma Order has been
+--  given, and the reference N is not in the same extended source unit as
+--  the declaration of T.
+function Begin_Keyword_Location (N : Node_Id) return Source_Ptr;
+--  Given block statement, entry body, package body, subprogram body, or
+--  task body N, return the closest source location to the "begin" keyword.
+function Build_Actual_Subtype
+(T : Entity_Id;
+N : Node_Or_Entity_Id) return Node_Id;
+--  Build an anonymous subtype for an entity or expression, using the
+--  bounds of the entity or the discriminants of the enclosing record.
+--  T is the type for which the actual subtype is required, and N is either
+--  a defining identifier, or any subexpression.
+function Build_Actual_Subtype_Of_Component
+(T : Entity_Id;
+N : Node_Id) return Node_Id;
+--  Determine whether a selected component has a type that depends on
+--  discriminants, and build actual subtype for it if so.
+--  Handling of inherited primitives whose ancestors have class-wide
+--  pre/postconditions.
+--  If a primitive operation of a parent type has a class-wide pre/post-
+--  condition that includes calls to other primitives, and that operation
+--  is inherited by a descendant type that also overrides some of these
+--  other primitives, the condition that applies to the inherited
+--  operation has a modified condition in which the overridden primitives
+--  have been replaced by the primitives of the descendent type. A call
+--  to the inherited operation cannot be simply a call to the parent
+--  operation (with an appropriate conversion) as is the case for other
+--  inherited operations, but must appear with a wrapper subprogram to which
+--  the modified conditions apply. Furthermore the call to the parent
+--  operation must not be subject to the original class-wide condition,
+--  given that modified conditions apply. To implement these semantics
+--  economically we create a subprogram body (a "class-wide clone") to
+--  which no pre/postconditions apply, and we create bodies for the
+--  original and the inherited operation that have their respective
+--  pre/postconditions and simply call the clone. The following operations
+--  take care of constructing declaration and body of the clone, and
+--  building the calls to it within the appropriate wrappers.
+procedure Build_Class_Wide_Clone_Body
+(Spec_Id  : Entity_Id;
+Bod      : Node_Id);
+--  Build body of subprogram that has a class-wide condition that contains
+--  calls to other primitives. Spec_Id is the Id of the subprogram, and B
+--  is its source body, which becomes the body of the clone.
+function Build_Class_Wide_Clone_Call
+(Loc      : Source_Ptr;
+Decls    : List_Id;
+Spec_Id  : Entity_Id;
+Spec     : Node_Id) return Node_Id;
+--  Build a call to the common class-wide clone of a subprogram with
+--  class-wide conditions. The body of the subprogram becomes a wrapper
+--  for a call to the clone. The inherited operation becomes a similar
+--  wrapper to which modified conditions apply, and the call to the
+--  clone includes the proper conversion in a call the parent operation.
+procedure Build_Class_Wide_Clone_Decl (Spec_Id : Entity_Id);
+--  For a subprogram that has a class-wide condition that contains calls
+--  to other primitives, build an internal subprogram that is invoked
+--  through a type-specific wrapper for all inherited subprograms that
+--  may have a modified condition.
+function Build_Default_Subtype
+(T : Entity_Id;
+N : Node_Id) return Entity_Id;
+--  If T is an unconstrained type with defaulted discriminants, build a
+--  subtype constrained by the default values, insert the subtype
+--  declaration in the tree before N, and return the entity of that
+--  subtype. Otherwise, simply return T.
+function Build_Discriminal_Subtype_Of_Component
+(T : Entity_Id) return Node_Id;
+--  Determine whether a record component has a type that depends on
+--  discriminants, and build actual subtype for it if so.
+procedure Build_Elaboration_Entity (N : Node_Id; Spec_Id : Entity_Id);
+--  Given a compilation unit node N, allocate an elaboration counter for
+--  the compilation unit, and install it in the Elaboration_Entity field
+--  of Spec_Id, the entity for the compilation unit.
+function Build_Overriding_Spec
+(Op  : Node_Id;
+Typ : Entity_Id) return Node_Id;
+--  Build a subprogram specification for the wrapper of an inherited
+--  operation with a modified pre- or postcondition (See AI12-0113).
+--  Op is the parent operation, and Typ is the descendant type that
+--  inherits the operation.
+procedure Build_Explicit_Dereference
+(Expr : Node_Id;
+Disc : Entity_Id);
+--  AI05-139: Names with implicit dereference. If the expression N is a
+--  reference type and the context imposes the corresponding designated
+--  type, convert N into N.Disc.all. Such expressions are always over-
+--  loaded with both interpretations, and the dereference interpretation
+--  carries the name of the reference discriminant.
+function Cannot_Raise_Constraint_Error (Expr : Node_Id) return Boolean;
+--  Returns True if the expression cannot possibly raise Constraint_Error.
+--  The response is conservative in the sense that a result of False does
+--  not necessarily mean that CE could be raised, but a response of True
+--  means that for sure CE cannot be raised.
+procedure Check_Dynamically_Tagged_Expression
+(Expr        : Node_Id;
+Typ         : Entity_Id;
+Related_Nod : Node_Id);
+--  Check wrong use of dynamically tagged expression
+procedure Check_Fully_Declared (T : Entity_Id; N : Node_Id);
+--  Verify that the full declaration of type T has been seen. If not, place
+--  error message on node N. Used in object declarations, type conversions
+--  and qualified expressions.
+procedure Check_Function_With_Address_Parameter (Subp_Id : Entity_Id);
+--  A subprogram that has an Address parameter and is declared in a Pure
+--  package is not considered Pure, because the parameter may be used as a
+--  pointer and the referenced data may change even if the address value
+--  itself does not.
+--  If the programmer gave an explicit Pure_Function pragma, then we respect
+--  the pragma and leave the subprogram Pure.
+procedure Check_Function_Writable_Actuals (N : Node_Id);
+--  (Ada 2012): If the construct N has two or more direct constituents that
+--  are names or expressions whose evaluation may occur in an arbitrary
+--  order, at least one of which contains a function call with an in out or
+--  out parameter, then the construct is legal only if: for each name that
+--  is passed as a parameter of mode in out or out to some inner function
+--  call C2 (not including the construct N itself), there is no other name
+--  anywhere within a direct constituent of the construct C other than
+--  the one containing C2, that is known to refer to the same object (RM
+--  6.4.1(6.17/3)).
+procedure Check_Implicit_Dereference (N : Node_Id; Typ : Entity_Id);
+--  AI05-139-2: Accessors and iterators for containers. This procedure
+--  checks whether T is a reference type, and if so it adds an interprettion
+--  to N whose type is the designated type of the reference_discriminant.
+--  If N is a generalized indexing operation, the interpretation is added
+--  both to the corresponding function call, and to the indexing node.
+procedure Check_Internal_Protected_Use (N : Node_Id; Nam : Entity_Id);
+--  Within a protected function, the current object is a constant, and
+--  internal calls to a procedure or entry are illegal. Similarly, other
+--  uses of a protected procedure in a renaming or a generic instantiation
+--  in the context of a protected function are illegal (AI05-0225).
+procedure Check_Later_Vs_Basic_Declarations
+(Decls          : List_Id;
+During_Parsing : Boolean);
+--  If During_Parsing is True, check for misplacement of later vs basic
+--  declarations in Ada 83. If During_Parsing is False, and the SPARK
+--  restriction is set, do the same: although SPARK 95 removes the
+--  distinction between initial and later declarative items, the distinction
+--  remains in the Examiner (JB01-005). Note that the Examiner does not
+--  count package declarations in later declarative items.
+procedure Check_No_Hidden_State (Id : Entity_Id);
+--  Determine whether object or state Id introduces a hidden state. If this
+--  is the case, emit an error.
+procedure Check_Nonvolatile_Function_Profile (Func_Id : Entity_Id);
+--  Verify that the profile of nonvolatile function Func_Id does not contain
+--  effectively volatile parameters or return type.
+procedure Check_Part_Of_Reference (Var_Id : Entity_Id; Ref : Node_Id);
+--  Verify the legality of reference Ref to variable Var_Id when the
+--  variable is a constituent of a single protected/task type.
+procedure Check_Potentially_Blocking_Operation (N : Node_Id);
+--  N is one of the statement forms that is a potentially blocking
+--  operation. If it appears within a protected action, emit warning.
+procedure Check_Previous_Null_Procedure
+(Decl : Node_Id;
+Prev : Entity_Id);
+--  A null procedure or a subprogram renaming can complete a previous
+--  declaration, unless that previous declaration is itself a null
+--  procedure. This must be treated specially because the analysis of
+--  the null procedure leaves the corresponding entity as having no
+--  completion, because its completion is provided by a generated body
+--  inserted after all other declarations.
+procedure Check_Result_And_Post_State (Subp_Id : Entity_Id);
+--  Determine whether the contract of subprogram Subp_Id mentions attribute
+--  'Result and it contains an expression that evaluates differently in pre-
+--  and post-state.
+procedure Check_State_Refinements
+(Context      : Node_Id;
+Is_Main_Unit : Boolean := False);
+--  Verify that all abstract states declared in a block statement, entry
+--  body, package body, protected body, subprogram body, task body, or a
+--  package declaration denoted by Context have proper refinement. Emit an
+--  error if this is not the case. Flag Is_Main_Unit should be set when
+--  Context denotes the main compilation unit.
+procedure Check_Unused_Body_States (Body_Id : Entity_Id);
+--  Verify that all abstract states and objects declared in the state space
+--  of package body Body_Id are used as constituents. Emit an error if this
+--  is not the case.
+procedure Check_Unprotected_Access
+(Context : Node_Id;
+Expr    : Node_Id);
+--  Check whether the expression is a pointer to a protected component,
+--  and the context is external to the protected operation, to warn against
+--  a possible unlocked access to data.
+function Choice_List (N : Node_Id) return List_Id;
+--  Utility to retrieve the choices of a Component_Association or the
+--  Discrete_Choices of an Iterated_Component_Association. For various
+--  reasons these nodes have a different structure even though they play
+--  similar roles in array aggregates.
+function Collect_Body_States (Body_Id : Entity_Id) return Elist_Id;
+--  Gather the entities of all abstract states and objects declared in the
+--  body state space of package body Body_Id.
+procedure Collect_Interfaces
+(T               : Entity_Id;
+Ifaces_List     : out Elist_Id;
+Exclude_Parents : Boolean := False;
+Use_Full_View   : Boolean := True);
+--  Ada 2005 (AI-251): Collect whole list of abstract interfaces that are
+--  directly or indirectly implemented by T. Exclude_Parents is used to
+--  avoid the addition of inherited interfaces to the generated list.
+--  Use_Full_View is used to collect the interfaces using the full-view
+--  (if available).
+procedure Collect_Interface_Components
+(Tagged_Type     : Entity_Id;
+Components_List : out Elist_Id);
+--  Ada 2005 (AI-251): Collect all the tag components associated with the
+--  secondary dispatch tables of a tagged type.
+procedure Collect_Interfaces_Info
+(T               : Entity_Id;
+Ifaces_List     : out Elist_Id;
+Components_List : out Elist_Id;
+Tags_List       : out Elist_Id);
+--  Ada 2005 (AI-251): Collect all the interfaces associated with T plus
+--  the record component and tag associated with each of these interfaces.
+--  On exit Ifaces_List, Components_List and Tags_List have the same number
+--  of elements, and elements at the same position on these tables provide
+--  information on the same interface type.
+procedure Collect_Parents
+(T             : Entity_Id;
+List          : out Elist_Id;
+Use_Full_View : Boolean := True);
+--  Collect all the parents of Typ. Use_Full_View is used to collect them
+--  using the full-view of private parents (if available).
+function Collect_Primitive_Operations (T : Entity_Id) return Elist_Id;
+--  Called upon type derivation and extension. We scan the declarative part
+--  in which the type appears, and collect subprograms that have one
+--  subsidiary subtype of the type. These subprograms can only appear after
+--  the type itself.
+function Compile_Time_Constraint_Error
+(N    : Node_Id;
+Msg  : String;
+Ent  : Entity_Id  := Empty;
+Loc  : Source_Ptr := No_Location;
+Warn : Boolean    := False) return Node_Id;
+--  This is similar to Apply_Compile_Time_Constraint_Error in that it
+--  generates a warning (or error) message in the same manner, but it does
+--  not replace any nodes. For convenience, the function always returns its
+--  first argument. The message is a warning if the message ends with ?, or
+--  we are operating in Ada 83 mode, or the Warn parameter is set to True.
+procedure Conditional_Delay (New_Ent, Old_Ent : Entity_Id);
+--  Sets the Has_Delayed_Freeze flag of New_Ent if the Delayed_Freeze flag
+--  of Old_Ent is set and Old_Ent has not yet been Frozen (i.e. Is_Frozen is
+--  False).
+function Contains_Refined_State (Prag : Node_Id) return Boolean;
+--  Determine whether pragma Prag contains a reference to the entity of an
+--  abstract state with a visible refinement. Prag must denote one of the
+--  following pragmas:
+--    Depends
+--    Global
+function Copy_Component_List
+(R_Typ : Entity_Id;
+Loc   : Source_Ptr) return List_Id;
+--  Copy components from record type R_Typ that come from source. Used to
+--  create a new compatible record type. Loc is the source location assigned
+--  to the created nodes.
+function Copy_Parameter_List (Subp_Id : Entity_Id) return List_Id;
+--  Utility to create a parameter profile for a new subprogram spec, when
+--  the subprogram has a body that acts as spec. This is done for some cases
+--  of inlining, and for private protected ops. Also used to create bodies
+--  for stubbed subprograms.
+procedure Copy_SPARK_Mode_Aspect (From : Node_Id; To : Node_Id);
+--  Copy the SPARK_Mode aspect if present in the aspect specifications
+--  of node From to node To. On entry it is assumed that To does not have
+--  aspect specifications. If From has no aspects, the routine has no
+--  effect.
+function Copy_Subprogram_Spec (Spec : Node_Id) return Node_Id;
+--  Replicate a function or a procedure specification denoted by Spec. The
+--  resulting tree is an exact duplicate of the original tree. New entities
+--  are created for the unit name and the formal parameters.
+function Corresponding_Generic_Type (T : Entity_Id) return Entity_Id;
+--  If a type is a generic actual type, return the corresponding formal in
+--  the generic parent unit. There is no direct link in the tree for this
+--  attribute, except in the case of formal private and derived types.
+--  Possible optimization???
+function Current_Entity (N : Node_Id) return Entity_Id;
+pragma Inline (Current_Entity);
+--  Find the currently visible definition for a given identifier, that is to
+--  say the first entry in the visibility chain for the Chars of N.
+function Current_Entity_In_Scope (N : Node_Id) return Entity_Id;
+--  Find whether there is a previous definition for identifier N in the
+--  current scope. Because declarations for a scope are not necessarily
+--  contiguous (e.g. for packages) the first entry on the visibility chain
+--  for N is not necessarily in the current scope.
+function Current_Scope return Entity_Id;
+--  Get entity representing current scope
+function Current_Scope_No_Loops return Entity_Id;
+--  Return the current scope ignoring internally generated loops
+function Current_Subprogram return Entity_Id;
+--  Returns current enclosing subprogram. If Current_Scope is a subprogram,
+--  then that is what is returned, otherwise the Enclosing_Subprogram of the
+--  Current_Scope is returned. The returned value is Empty if this is called
+--  from a library package which is not within any subprogram.
+function Deepest_Type_Access_Level (Typ : Entity_Id) return Uint;
+--  Same as Type_Access_Level, except that if the type is the type of an Ada
+--  2012 stand-alone object of an anonymous access type, then return the
+--  static accesssibility level of the object. In that case, the dynamic
+--  accessibility level of the object may take on values in a range. The low
+--  bound of that range is returned by Type_Access_Level; this function
+--  yields the high bound of that range. Also differs from Type_Access_Level
+--  in the case of a descendant of a generic formal type (returns Int'Last
+--  instead of 0).
+function Defining_Entity
+(N                  : Node_Id;
+Empty_On_Errors    : Boolean := False;
+Concurrent_Subunit : Boolean := False) return Entity_Id;
+--  Given a declaration N, returns the associated defining entity. If the
+--  declaration has a specification, the entity is obtained from the
+--  specification. If the declaration has a defining unit name, then the
+--  defining entity is obtained from the defining unit name ignoring any
+--  child unit prefixes.
+--
+--  Iterator loops also have a defining entity, which holds the list of
+--  local entities declared during loop expansion. These entities need
+--  debugging information, generated through Qualify_Entity_Names, and
+--  the loop declaration must be placed in the table Name_Qualify_Units.
+--
+--  Set flag Empty_On_Error to change the behavior of this routine as
+--  follows:
+--
+--    * True  - A declaration that lacks a defining entity returns Empty.
+--      A node that does not allow for a defining entity returns Empty.
+--
+--    * False - A declaration that lacks a defining entity is given a new
+--      internally generated entity which is subsequently returned. A node
+--      that does not allow for a defining entity raises Program_Error.
+--
+--  The former semantics is appropriate for the back end; the latter
+--  semantics is appropriate for the front end.
+--
+--  Set flag Concurrent_Subunit to handle rewritings of concurrent bodies
+--  which act as subunits. Such bodies are generally rewritten as null.
+function Denotes_Discriminant
+(N                : Node_Id;
+Check_Concurrent : Boolean := False) return Boolean;
+--  Returns True if node N is an Entity_Name node for a discriminant. If the
+--  flag Check_Concurrent is true, function also returns true when N denotes
+--  the discriminal of the discriminant of a concurrent type. This is needed
+--  to disable some optimizations on private components of protected types,
+--  and constraint checks on entry families constrained by discriminants.
+function Denotes_Same_Object (A1, A2 : Node_Id) return Boolean;
+--  Detect suspicious overlapping between actuals in a call, when both are
+--  writable (RM 2012 6.4.1(6.4/3))
+function Denotes_Same_Prefix (A1, A2 : Node_Id) return Boolean;
+--  Functions to detect suspicious overlapping between actuals in a call,
+--  when one of them is writable. The predicates are those proposed in
+--  AI05-0144, to detect dangerous order dependence in complex calls.
+--  I would add a parameter Warn which enables more extensive testing of
+--  cases as we find appropriate when we are only warning ??? Or perhaps
+--  return an indication of (Error, Warn, OK) ???
+function Denotes_Variable (N : Node_Id) return Boolean;
+--  Returns True if node N denotes a single variable without parentheses
+function Depends_On_Discriminant (N : Node_Id) return Boolean;
+--  Returns True if N denotes a discriminant or if N is a range, a subtype
+--  indication or a scalar subtype where one of the bounds is a
+--  discriminant.
+function Designate_Same_Unit
+(Name1 : Node_Id;
+Name2 : Node_Id) return  Boolean;
+--  Returns True if Name1 and Name2 designate the same unit name; each of
+--  these names is supposed to be a selected component name, an expanded
+--  name, a defining program unit name or an identifier.
+procedure Diagnose_Iterated_Component_Association (N : Node_Id);
+--  Emit an error if iterated component association N is actually an illegal
+--  quantified expression lacking a quantifier.
+function Dynamic_Accessibility_Level (Expr : Node_Id) return Node_Id;
+--  Expr should be an expression of an access type. Builds an integer
+--  literal except in cases involving anonymous access types where
+--  accessibility levels are tracked at runtime (access parameters and Ada
+--  2012 stand-alone objects).
+function Discriminated_Size (Comp : Entity_Id) return Boolean;
+--  If a component size is not static then a warning will be emitted
+--  in Ravenscar or other restricted contexts. When a component is non-
+--  static because of a discriminant constraint we can specialize the
+--  warning by mentioning discriminants explicitly. This was created for
+--  private components of protected objects, but is generally useful when
+--  retriction (No_Implicit_Heap_Allocation) is active.
+function Effective_Extra_Accessibility (Id : Entity_Id) return Entity_Id;
+--  Same as Einfo.Extra_Accessibility except thtat object renames
+--  are looked through.
+function Effective_Reads_Enabled (Id : Entity_Id) return Boolean;
+--  Given the entity of an abstract state or a variable, determine whether
+--  Id is subject to external property Effective_Reads and if it is, the
+--  related expression evaluates to True.
+function Effective_Writes_Enabled (Id : Entity_Id) return Boolean;
+--  Given the entity of an abstract state or a variable, determine whether
+--  Id is subject to external property Effective_Writes and if it is, the
+--  related expression evaluates to True.
+function Enclosing_Comp_Unit_Node (N : Node_Id) return Node_Id;
+--  Returns the enclosing N_Compilation_Unit node that is the root of a
+--  subtree containing N.
+function Enclosing_CPP_Parent (Typ : Entity_Id) return Entity_Id;
+--  Returns the closest ancestor of Typ that is a CPP type.
+function Enclosing_Declaration (N : Node_Id) return Node_Id;
+--  Returns the declaration node enclosing N (including possibly N itself),
+--  if any, or Empty otherwise.
+function Enclosing_Generic_Body (N : Node_Id) return Node_Id;
+--  Returns the Node_Id associated with the innermost enclosing generic
+--  body, if any. If none, then returns Empty.
+function Enclosing_Generic_Unit (N : Node_Id) return Node_Id;
+--  Returns the Node_Id associated with the innermost enclosing generic
+--  unit, if any. If none, then returns Empty.
+function Enclosing_Lib_Unit_Entity
+(E : Entity_Id := Current_Scope) return Entity_Id;
+--  Returns the entity of enclosing library unit node which is the root of
+--  the current scope (which must not be Standard_Standard, and the caller
+--  is responsible for ensuring this condition) or other specified entity.
+function Enclosing_Lib_Unit_Node (N : Node_Id) return Node_Id;
+--  Returns the N_Compilation_Unit node of the library unit that is directly
+--  or indirectly (through a subunit) at the root of a subtree containing
+--  N. This may be either the same as Enclosing_Comp_Unit_Node, or if
+--  Enclosing_Comp_Unit_Node returns a subunit, then the corresponding
+--  library unit. If no such item is found, returns Empty.
+function Enclosing_Package (E : Entity_Id) return Entity_Id;
+--  Utility function to return the Ada entity of the package enclosing
+--  the entity E, if any. Returns Empty if no enclosing package.
+function Enclosing_Package_Or_Subprogram (E : Entity_Id) return Entity_Id;
+--  Returns the entity of the package or subprogram enclosing E, if any.
+--  Returns Empty if no enclosing package or subprogram.
+function Enclosing_Subprogram (E : Entity_Id) return Entity_Id;
+--  Utility function to return the Ada entity of the subprogram enclosing
+--  the entity E, if any. Returns Empty if no enclosing subprogram.
+function End_Keyword_Location (N : Node_Id) return Source_Ptr;
+--  Given block statement, entry body, package body, package declaration,
+--  protected body, [single] protected type declaration, subprogram body,
+--  task body, or [single] task type declaration N, return the closest
+--  source location of the "end" keyword.
+procedure Ensure_Freeze_Node (E : Entity_Id);
+--  Make sure a freeze node is allocated for entity E. If necessary, build
+--  and initialize a new freeze node and set Has_Delayed_Freeze True for E.
+procedure Enter_Name (Def_Id : Entity_Id);
+--  Insert new name in symbol table of current scope with check for
+--  duplications (error message is issued if a conflict is found).
+--  Note: Enter_Name is not used for overloadable entities, instead these
+--  are entered using Sem_Ch6.Enter_Overloadable_Entity.
+function Entity_Of (N : Node_Id) return Entity_Id;
+--  Obtain the entity of arbitrary node N. If N is a renaming, return the
+--  entity of the earliest renamed source abstract state or whole object.
+--  If no suitable entity is available, return Empty.
+procedure Explain_Limited_Type (T : Entity_Id; N : Node_Id);
+--  This procedure is called after issuing a message complaining about an
+--  inappropriate use of limited type T. If useful, it adds additional
+--  continuation lines to the message explaining why type T is limited.
+--  Messages are placed at node N.
+function Expression_Of_Expression_Function
+(Subp : Entity_Id) return Node_Id;
+--  Return the expression of expression function Subp
+type Extensions_Visible_Mode is
+(Extensions_Visible_None,
+--  Extensions_Visible does not yield a mode when SPARK_Mode is off. This
+--  value acts as a default in a non-SPARK compilation.
+Extensions_Visible_False,
+--  A value of "False" signifies that Extensions_Visible is either
+--  missing or the pragma is present and the value of its Boolean
+--  expression is False.
+Extensions_Visible_True);
+--  A value of "True" signifies that Extensions_Visible is present and
+--  the value of its Boolean expression is True.
+function Extensions_Visible_Status
+(Id : Entity_Id) return Extensions_Visible_Mode;
+--  Given the entity of a subprogram or formal parameter subject to pragma
+--  Extensions_Visible, return the Boolean value denoted by the expression
+--  of the pragma.
+procedure Find_Actual
+(N      : Node_Id;
+Formal : out Entity_Id;
+Call   : out Node_Id);
+--  Determines if the node N is an actual parameter of a function or a
+--  procedure call. If so, then Formal points to the entity for the formal
+--  (Ekind is E_In_Parameter, E_Out_Parameter, or E_In_Out_Parameter) and
+--  Call is set to the node for the corresponding call. If the node N is not
+--  an actual parameter then Formal and Call are set to Empty.
+function Find_Body_Discriminal
+(Spec_Discriminant : Entity_Id) return Entity_Id;
+--  Given a discriminant of the record type that implements a task or
+--  protected type, return the discriminal of the corresponding discriminant
+--  of the actual concurrent type.
+function Find_Corresponding_Discriminant
+(Id   : Node_Id;
+Typ  : Entity_Id) return Entity_Id;
+--  Because discriminants may have different names in a generic unit and in
+--  an instance, they are resolved positionally when possible. A reference
+--  to a discriminant carries the discriminant that it denotes when it is
+--  analyzed. Subsequent uses of this id on a different type denotes the
+--  discriminant at the same position in this new type.
+function Find_Enclosing_Iterator_Loop (Id : Entity_Id) return Entity_Id;
+--  Find the nearest iterator loop which encloses arbitrary entity Id. If
+--  such a loop exists, return the entity of its identifier (E_Loop scope),
+--  otherwise return Empty.
+function Find_Enclosing_Scope (N : Node_Id) return Entity_Id;
+--  Find the nearest scope which encloses arbitrary node N
+function Find_Loop_In_Conditional_Block (N : Node_Id) return Node_Id;
+--  Find the nested loop statement in a conditional block. Loops subject to
+--  attribute 'Loop_Entry are transformed into blocks. Parts of the original
+--  loop are nested within the block.
+procedure Find_Overlaid_Entity
+(N   : Node_Id;
+Ent : out Entity_Id;
+Off : out Boolean);
+--  The node N should be an address representation clause. Determines if
+--  the target expression is the address of an entity with an optional
+--  offset. If so, set Ent to the entity and, if there is an offset, set
+--  Off to True, otherwise to False. If N is not an address representation
+--  clause, or if it is not possible to determine that the address is of
+--  this form, then set Ent to Empty.
+function Find_Parameter_Type (Param : Node_Id) return Entity_Id;
+--  Return the type of formal parameter Param as determined by its
+--  specification.
+--  The following type describes the placement of an arbitrary entity with
+--  respect to SPARK visible / hidden state space.
+type State_Space_Kind is
+(Not_In_Package,
+--  An entity is not in the visible, private or body state space when
+--  the immediate enclosing construct is not a package.
+Visible_State_Space,
+--  An entity is in the visible state space when it appears immediately
+--  within the visible declarations of a package or when it appears in
+--  the visible state space of a nested package which in turn is declared
+--  in the visible declarations of an enclosing package:
+--    package Pack is
+--       Visible_Variable : ...
+--       package Nested
+--         with Abstract_State => Visible_State
+--       is
+--          Visible_Nested_Variable : ...
+--       end Nested;
+--    end Pack;
+--  Entities associated with a package instantiation inherit the state
+--  space from the instance placement:
+--     generic
+--     package Gen is
+--        Generic_Variable : ...
+--     end Gen;
+--     with Gen;
+--     package Pack is
+--        package Inst is new Gen;
+--        --  Generic_Variable is in the visible state space of Pack
+--     end Pack;
+Private_State_Space,
+--  An entity is in the private state space when it appears immediately
+--  within the private declarations of a package or when it appears in
+--  the visible state space of a nested package which in turn is declared
+--  in the private declarations of an enclosing package:
+--    package Pack is
+--    private
+--       Private_Variable : ...
+--       package Nested
+--         with Abstract_State => Private_State
+--       is
+--          Private_Nested_Variable : ...
+--       end Nested;
+--    end Pack;
+--  The same placement principle applies to package instantiations
+Body_State_Space);
+--  An entity is in the body state space when it appears immediately
+--  within the declarations of a package body or when it appears in the
+--  visible state space of a nested package which in turn is declared in
+--  the declarations of an enclosing package body:
+--    package body Pack is
+--       Body_Variable : ...
+--       package Nested
+--         with Abstract_State => Body_State
+--       is
+--          Body_Nested_Variable : ...
+--       end Nested;
+--    end Pack;
+--  The same placement principle applies to package instantiations
+procedure Find_Placement_In_State_Space
+(Item_Id   : Entity_Id;
+Placement : out State_Space_Kind;
+Pack_Id   : out Entity_Id);
+--  Determine the state space placement of an item. Item_Id denotes the
+--  entity of an abstract state, object or package instantiation. Placement
+--  captures the precise placement of the item in the enclosing state space.
+--  If the state space is that of a package, Pack_Id denotes its entity,
+--  otherwise Pack_Id is Empty.
+function Find_Specific_Type (CW : Entity_Id) return Entity_Id;
+--  Find specific type of a class-wide type, and handle the case of an
+--  incomplete type coming either from a limited_with clause or from an
+--  incomplete type declaration. If resulting type is private return its
+--  full view.
+function Find_Static_Alternative (N : Node_Id) return Node_Id;
+--  N is a case statement whose expression is a compile-time value.
+--  Determine the alternative chosen, so that the code of non-selected
+--  alternatives, and the warnings that may apply to them, are removed.
+function First_Actual (Node : Node_Id) return Node_Id;
+--  Node is an N_Function_Call, N_Procedure_Call_Statement or
+--  N_Entry_Call_Statement node. The result returned is the first actual
+--  parameter in declaration order (not the order of parameters as they
+--  appeared in the source, which can be quite different as a result of the
+--  use of named parameters). Empty is returned for a call with no
+--  parameters. The procedure for iterating through the actuals in
+--  declaration order is to use this function to find the first actual, and
+--  then use Next_Actual to obtain the next actual in declaration order.
+--  Note that the value returned is always the expression (not the
+--  N_Parameter_Association nodes, even if named association is used).
+function First_Global
+(Subp        : Entity_Id;
+Global_Mode : Name_Id;
+Refined     : Boolean := False) return Node_Id;
+--  Returns the first global item of mode Global_Mode (which can be
+--  Name_Input, Name_Output, Name_In_Out or Name_Proof_In) associated to
+--  subprogram Subp, or Empty otherwise. If Refined is True, the global item
+--  is retrieved from the Refined_Global aspect/pragma associated to the
+--  body of Subp if present. Next_Global can be used to get the next global
+--  item with the same mode.
+function Fix_Msg (Id : Entity_Id; Msg : String) return String;
+--  Replace all occurrences of a particular word in string Msg depending on
+--  the Ekind of Id as follows:
+--    * Replace "subprogram" with
+--      - "entry" when Id is an entry [family]
+--      - "task type" when Id is a single task object, task type or task
+--         body.
+--    * Replace "protected" with
+--      - "task" when Id is a single task object, task type or task body
+--  All other non-matching words remain as is
+function From_Nested_Package (T : Entity_Id) return Boolean;
+--  A type declared in a nested package may be frozen by a declaration
+--  appearing after the package but before the package is frozen. If the
+--  type has aspects that generate subprograms, these may contain references
+--  to entities local to the nested package. In that case the package must
+--  be installed on the scope stack to prevent spurious visibility errors.
+procedure Gather_Components
+(Typ           : Entity_Id;
+Comp_List     : Node_Id;
+Governed_By   : List_Id;
+Into          : Elist_Id;
+Report_Errors : out Boolean);
+--  The purpose of this procedure is to gather the valid components in a
+--  record type according to the values of its discriminants, in order to
+--  validate the components of a record aggregate.
+--
+--    Typ is the type of the aggregate when its constrained discriminants
+--      need to be collected, otherwise it is Empty.
+--
+--    Comp_List is an N_Component_List node.
+--
+--    Governed_By is a list of N_Component_Association nodes, where each
+--     choice list contains the name of a discriminant and the expression
+--     field gives its value. The values of the discriminants governing
+--     the (possibly nested) variant parts in Comp_List are found in this
+--     Component_Association List.
+--
+--    Into is the list where the valid components are appended. Note that
+--     Into need not be an Empty list. If it's not, components are attached
+--     to its tail.
+--
+--    Report_Errors is set to True if the values of the discriminants are
+--     non-static.
+--
+--  This procedure is also used when building a record subtype. If the
+--  discriminant constraint of the subtype is static, the components of the
+--  subtype are only those of the variants selected by the values of the
+--  discriminants. Otherwise all components of the parent must be included
+--  in the subtype for semantic analysis.
+function Get_Actual_Subtype (N : Node_Id) return Entity_Id;
+--  Given a node for an expression, obtain the actual subtype of the
+--  expression. In the case of a parameter where the formal is an
+--  unconstrained array or discriminated type, this will be the previously
+--  constructed subtype of the actual. Note that this is not quite the
+--  "Actual Subtype" of the RM, since it is always a constrained type, i.e.
+--  it is the subtype of the value of the actual. The actual subtype is also
+--  returned in other cases where it has already been constructed for an
+--  object. Otherwise the expression type is returned unchanged, except for
+--  the case of an unconstrained array type, where an actual subtype is
+--  created, using Insert_Actions if necessary to insert any associated
+--  actions.
+function Get_Actual_Subtype_If_Available (N : Node_Id) return Entity_Id;
+--  This is like Get_Actual_Subtype, except that it never constructs an
+--  actual subtype. If an actual subtype is already available, i.e. the
+--  Actual_Subtype field of the corresponding entity is set, then it is
+--  returned. Otherwise the Etype of the node is returned.
+function Get_Body_From_Stub (N : Node_Id) return Node_Id;
+--  Return the body node for a stub
+function Get_Cursor_Type
+(Aspect : Node_Id;
+Typ    : Entity_Id) return Entity_Id;
+--  Find Cursor type in scope of type Typ with Iterable aspect, by locating
+--  primitive operation First. For use in resolving the other primitive
+--  operations of an Iterable type and expanding loops and quantified
+--  expressions over formal containers.
+function Get_Cursor_Type (Typ : Entity_Id) return Entity_Id;
+--  Find Cursor type in scope of type Typ with Iterable aspect, by locating
+--  primitive operation First. For use after resolving the primitive
+--  operations of an Iterable type.
+function Get_Default_External_Name (E : Node_Or_Entity_Id) return Node_Id;
+--  This is used to construct the string literal node representing a
+--  default external name, i.e. one that is constructed from the name of an
+--  entity, or (in the case of extended DEC import/export pragmas, an
+--  identifier provided as the external name. Letters in the name are
+--  according to the setting of Opt.External_Name_Default_Casing.
+function Get_Enclosing_Object (N : Node_Id) return Entity_Id;
+--  If expression N references a part of an object, return this object.
+--  Otherwise return Empty. Expression N should have been resolved already.
+function Get_Generic_Entity (N : Node_Id) return Entity_Id;
+--  Returns the true generic entity in an instantiation. If the name in the
+--  instantiation is a renaming, the function returns the renamed generic.
+function Get_Incomplete_View_Of_Ancestor (E : Entity_Id) return Entity_Id;
+--  Implements the notion introduced ever-so briefly in RM 7.3.1 (5.2/3):
+--  in a child unit a derived type is within the derivation class of an
+--  ancestor declared in a parent unit, even if there is an intermediate
+--  derivation that does not see the full view of that ancestor.
+procedure Get_Index_Bounds
+(N             : Node_Id;
+L             : out Node_Id;
+H             : out Node_Id;
+Use_Full_View : Boolean := False);
+--  This procedure assigns to L and H respectively the values of the low and
+--  high bounds of node N, which must be a range, subtype indication, or the
+--  name of a scalar subtype. The result in L, H may be set to Error if
+--  there was an earlier error in the range.
+--  Use_Full_View is intended for use by clients other than the compiler
+--  (specifically, gnat2scil) to indicate that we want the full view if
+--  the index type turns out to be a partial view; this case should not
+--  arise during normal compilation of semantically correct programs.
+procedure Get_Interfacing_Aspects
+(Iface_Asp : Node_Id;
+Conv_Asp  : out Node_Id;
+EN_Asp    : out Node_Id;
+Expo_Asp  : out Node_Id;
+Imp_Asp   : out Node_Id;
+LN_Asp    : out Node_Id;
+Do_Checks : Boolean := False);
+--  Given a single interfacing aspect Iface_Asp, retrieve other interfacing
+--  aspects that apply to the same related entity. The aspects considered by
+--  this routine are as follows:
+--
+--    Conv_Asp - aspect Convention
+--    EN_Asp   - aspect External_Name
+--    Expo_Asp - aspect Export
+--    Imp_Asp  - aspect Import
+--    LN_Asp   - aspect Link_Name
+--
+--  When flag Do_Checks is set, this routine will flag duplicate uses of
+--  aspects.
+function Get_Enum_Lit_From_Pos
+(T   : Entity_Id;
+Pos : Uint;
+Loc : Source_Ptr) return Node_Id;
+--  This function returns an identifier denoting the E_Enumeration_Literal
+--  entity for the specified value from the enumeration type or subtype T.
+--  The second argument is the Pos value. Constraint_Error is raised if
+--  argument Pos is not in range. The third argument supplies a source
+--  location for constructed nodes returned by this function. If No_Location
+--  is supplied as source location, the location of the returned node is
+--  copied from the original source location for the enumeration literal,
+--  when available.
+function Get_Iterable_Type_Primitive
+(Typ : Entity_Id;
+Nam : Name_Id) return Entity_Id;
+--  Retrieve one of the primitives First, Next, Has_Element, Element from
+--  the value of the Iterable aspect of a type.
+procedure Get_Library_Unit_Name_String (Decl_Node : Node_Id);
+--  Retrieve the fully expanded name of the library unit declared by
+--  Decl_Node into the name buffer.
+function Get_Max_Queue_Length (Id : Entity_Id) return Uint;
+--  Return the argument of pragma Max_Queue_Length or zero if the annotation
+--  is not present. It is assumed that Id denotes an entry.
+function Get_Name_Entity_Id (Id : Name_Id) return Entity_Id;
+pragma Inline (Get_Name_Entity_Id);
+--  An entity value is associated with each name in the name table. The
+--  Get_Name_Entity_Id function fetches the Entity_Id of this entity, which
+--  is the innermost visible entity with the given name. See the body of
+--  Sem_Ch8 for further details on handling of entity visibility.
+function Get_Name_From_CTC_Pragma (N : Node_Id) return String_Id;
+--  Return the Name component of Test_Case pragma N
+--  Bad name now that this no longer applies to Contract_Case ???
+function Get_Parent_Entity (Unit : Node_Id) return Entity_Id;
+--  Get defining entity of parent unit of a child unit. In most cases this
+--  is the defining entity of the unit, but for a child instance whose
+--  parent needs a body for inlining, the instantiation node of the parent
+--  has not yet been rewritten as a package declaration, and the entity has
+--  to be retrieved from the Instance_Spec of the unit.
+function Get_Pragma_Id (N : Node_Id) return Pragma_Id;
+pragma Inline (Get_Pragma_Id);
+--  Obtains the Pragma_Id from Pragma_Name_Unmapped (N)
+function Get_Qualified_Name
+(Id     : Entity_Id;
+Suffix : Entity_Id := Empty) return Name_Id;
+--  Obtain the fully qualified form of entity Id. The format is:
+--    scope_of_id-1__scope_of_id__chars_of_id__chars_of_suffix
+function Get_Qualified_Name
+(Nam    : Name_Id;
+Suffix : Name_Id   := No_Name;
+Scop   : Entity_Id := Current_Scope) return Name_Id;
+--  Obtain the fully qualified form of name Nam assuming it appears in scope
+--  Scop. The format is:
+--    scop-1__scop__nam__suffix
+procedure Get_Reason_String (N : Node_Id);
+--  Recursive routine to analyze reason argument for pragma Warnings. The
+--  value of the reason argument is appended to the current string using
+--  Store_String_Chars. The reason argument is expected to be a string
+--  literal or concatenation of string literals. An error is given for
+--  any other form.
+function Get_Reference_Discriminant (Typ : Entity_Id) return Entity_Id;
+--  If Typ has Implicit_Dereference, return discriminant specified in the
+--  corresponding aspect.
+function Get_Referenced_Object (N : Node_Id) return Node_Id;
+--  Given a node, return the renamed object if the node represents a renamed
+--  object, otherwise return the node unchanged. The node may represent an
+--  arbitrary expression.
+function Get_Renamed_Entity (E : Entity_Id) return Entity_Id;
+--  Given an entity for an exception, package, subprogram or generic unit,
+--  returns the ultimately renamed entity if this is a renaming. If this is
+--  not a renamed entity, returns its argument. It is an error to call this
+--  with any other kind of entity.
+function Get_Return_Object (N : Node_Id) return Entity_Id;
+--  Given an extended return statement, return the corresponding return
+--  object, identified as the one for which Is_Return_Object = True.
+function Get_Subprogram_Entity (Nod : Node_Id) return Entity_Id;
+--  Nod is either a procedure call statement, or a function call, or an
+--  accept statement node. This procedure finds the Entity_Id of the related
+--  subprogram or entry and returns it, or if no subprogram can be found,
+--  returns Empty.
+function Get_Task_Body_Procedure (E : Entity_Id) return Entity_Id;
+--  Given an entity for a task type or subtype, retrieves the
+--  Task_Body_Procedure field from the corresponding task type declaration.
+function Get_User_Defined_Eq (E : Entity_Id) return Entity_Id;
+--  For a type entity, return the entity of the primitive equality function
+--  for the type if it exists, otherwise return Empty.
+procedure Get_Views
+(Typ       : Entity_Id;
+Priv_Typ  : out Entity_Id;
+Full_Typ  : out Entity_Id;
+Full_Base : out Entity_Id;
+CRec_Typ  : out Entity_Id);
+--  Obtain the partial and full view of type Typ and in addition any extra
+--  types the full view may have. The return entities are as follows:
+--
+--    Priv_Typ  - the partial view (a private type)
+--    Full_Typ  - the full view
+--    Full_Base - the base type of the full view
+--    CRec_Typ  - the corresponding record type of the full view
+function Has_Access_Values (T : Entity_Id) return Boolean;
+--  Returns true if type or subtype T is an access type, or has a component
+--  (at any recursive level) that is an access type. This is a conservative
+--  predicate, if it is not known whether or not T contains access values
+--  (happens for generic formals in some cases), then False is returned.
+--  Note that tagged types return False. Even though the tag is implemented
+--  as an access type internally, this function tests only for access types
+--  known to the programmer. See also Has_Tagged_Component.
+type Alignment_Result is (Known_Compatible, Unknown, Known_Incompatible);
+--  Result of Has_Compatible_Alignment test, description found below. Note
+--  that the values are arranged in increasing order of problematicness.
+function Has_Compatible_Alignment
+(Obj         : Entity_Id;
+Expr        : Node_Id;
+Layout_Done : Boolean) return Alignment_Result;
+--  Obj is an object entity, and expr is a node for an object reference. If
+--  the alignment of the object referenced by Expr is known to be compatible
+--  with the alignment of Obj (i.e. is larger or the same), then the result
+--  is Known_Compatible. If the alignment of the object referenced by Expr
+--  is known to be less than the alignment of Obj, then Known_Incompatible
+--  is returned. If neither condition can be reliably established at compile
+--  time, then Unknown is returned. If Layout_Done is True, the function can
+--  assume that the information on size and alignment of types and objects
+--  is present in the tree. This is used to determine if alignment checks
+--  are required for address clauses (Layout_Done is False in this case) as
+--  well as to issue appropriate warnings for them in the post compilation
+--  phase (Layout_Done is True in this case).
+--
+--  Note: Known_Incompatible does not mean that at run time the alignment
+--  of Expr is known to be wrong for Obj, just that it can be determined
+--  that alignments have been explicitly or implicitly specified which are
+--  incompatible (whereas Unknown means that even this is not known). The
+--  appropriate reaction of a caller to Known_Incompatible is to treat it as
+--  Unknown, but issue a warning that there may be an alignment error.
+function Has_Declarations (N : Node_Id) return Boolean;
+--  Determines if the node can have declarations
+function Has_Defaulted_Discriminants (Typ : Entity_Id) return Boolean;
+--  Simple predicate to test for defaulted discriminants
+function Has_Denormals (E : Entity_Id) return Boolean;
+--  Determines if the floating-point type E supports denormal numbers.
+--  Returns False if E is not a floating-point type.
+function Has_Discriminant_Dependent_Constraint
+(Comp : Entity_Id) return Boolean;
+--  Returns True if and only if Comp has a constrained subtype that depends
+--  on a discriminant.
+function Has_Effectively_Volatile_Profile
+(Subp_Id : Entity_Id) return Boolean;
+--  Determine whether subprogram Subp_Id has an effectively volatile formal
+--  parameter or returns an effectively volatile value.
+function Has_Full_Default_Initialization (Typ : Entity_Id) return Boolean;
+--  Determine whether type Typ defines "full default initialization" as
+--  specified by SPARK RM 3.1. To qualify as such, the type must be
+--    * A scalar type with specified Default_Value
+--    * An array-of-scalar type with specified Default_Component_Value
+--    * An array type whose element type defines full default initialization
+--    * A protected type, record type or type extension whose components
+--      either include a default expression or have a type which defines
+--      full default initialization. In the case of type extensions, the
+--      parent type defines full default initialization.
+--   * A task type
+--   * A private type whose Default_Initial_Condition is non-null
+function Has_Infinities (E : Entity_Id) return Boolean;
+--  Determines if the range of the floating-point type E includes
+--  infinities. Returns False if E is not a floating-point type.
+function Has_Interfaces
+(T             : Entity_Id;
+Use_Full_View : Boolean := True) return Boolean;
+--  Where T is a concurrent type or a record type, returns true if T covers
+--  any abstract interface types. In case of private types the argument
+--  Use_Full_View controls if the check is done using its full view (if
+--  available).
+function Has_Max_Queue_Length (Id : Entity_Id) return Boolean;
+--  Determine whether Id is subject to pragma Max_Queue_Length. It is
+--  assumed that Id denotes an entry.
+function Has_No_Obvious_Side_Effects (N : Node_Id) return Boolean;
+--  This is a simple minded function for determining whether an expression
+--  has no obvious side effects. It is used only for determining whether
+--  warnings are needed in certain situations, and is not guaranteed to
+--  be accurate in either direction. Exceptions may mean an expression
+--  does in fact have side effects, but this may be ignored and True is
+--  returned, or a complex expression may in fact be side effect free
+--  but we don't recognize it here and return False. The Side_Effect_Free
+--  routine in Remove_Side_Effects is much more extensive and perhaps could
+--  be shared, so that this routine would be more accurate.
+function Has_Non_Null_Refinement (Id : Entity_Id) return Boolean;
+--  Determine whether abstract state Id has at least one nonnull constituent
+--  as expressed in pragma Refined_State. This function does not take into
+--  account the visible refinement region of abstract state Id.
+function Has_Non_Trivial_Precondition (Subp : Entity_Id) return Boolean;
+--  Determine whether subprogram Subp has a class-wide precondition that is
+--  not statically True.
+function Has_Null_Body (Proc_Id : Entity_Id) return Boolean;
+--  Determine whether the body of procedure Proc_Id contains a sole null
+--  statement, possibly followed by an optional return. Used to optimize
+--  useless calls to assertion checks.
+function Has_Null_Exclusion (N : Node_Id) return Boolean;
+--  Determine whether node N has a null exclusion
+function Has_Null_Refinement (Id : Entity_Id) return Boolean;
+--  Determine whether abstract state Id has a null refinement as expressed
+--  in pragma Refined_State. This function does not take into account the
+--  visible refinement region of abstract state Id.
+function Has_Overriding_Initialize (T : Entity_Id) return Boolean;
+--  Predicate to determine whether a controlled type has a user-defined
+--  Initialize primitive (and, in Ada 2012, whether that primitive is
+--  non-null), which causes the type to not have preelaborable
+--  initialization.
+function Has_Preelaborable_Initialization (E : Entity_Id) return Boolean;
+--  Return True iff type E has preelaborable initialization as defined in
+--  Ada 2005 (see AI-161 for details of the definition of this attribute).
+function Has_Private_Component (Type_Id : Entity_Id) return Boolean;
+--  Check if a type has a (sub)component of a private type that has not
+--  yet received a full declaration.
+function Has_Signed_Zeros (E : Entity_Id) return Boolean;
+--  Determines if the floating-point type E supports signed zeros.
+--  Returns False if E is not a floating-point type.
+function Has_Significant_Contract (Subp_Id : Entity_Id) return Boolean;
+--  Determine whether subprogram [body] Subp_Id has a significant contract.
+--  All subprograms have a N_Contract node, but this does not mean that the
+--  contract is useful.
+function Has_Static_Array_Bounds (Typ : Node_Id) return Boolean;
+--  Return whether an array type has static bounds
+function Has_Stream (T : Entity_Id) return Boolean;
+--  Tests if type T is derived from Ada.Streams.Root_Stream_Type, or in the
+--  case of a composite type, has a component for which this predicate is
+--  True, and if so returns True. Otherwise a result of False means that
+--  there is no Stream type in sight. For a private type, the test is
+--  applied to the underlying type (or returns False if there is no
+--  underlying type).
+function Has_Suffix (E : Entity_Id; Suffix : Character) return Boolean;
+--  Returns true if the last character of E is Suffix. Used in Assertions.
+function Has_Tagged_Component (Typ : Entity_Id) return Boolean;
+--  Returns True if Typ is a composite type (array or record) that is either
+--  a tagged type or has a subcomponent that is tagged. Returns False for a
+--  noncomposite type, or if no tagged subcomponents are present. This
+--  function is used to check if "=" has to be expanded into a bunch
+--  component comparisons.
+function Has_Undefined_Reference (Expr : Node_Id) return Boolean;
+--  Given arbitrary expression Expr, determine whether it contains at
+--  least one name whose entity is Any_Id.
+function Has_Volatile_Component (Typ : Entity_Id) return Boolean;
+--  Given arbitrary type Typ, determine whether it contains at least one
+--  volatile component.
+function Implementation_Kind (Subp : Entity_Id) return Name_Id;
+--  Subp is a subprogram marked with pragma Implemented. Return the specific
+--  implementation requirement which the pragma imposes. The return value is
+--  either Name_By_Any, Name_By_Entry or Name_By_Protected_Procedure.
+function Implements_Interface
+(Typ_Ent         : Entity_Id;
+Iface_Ent       : Entity_Id;
+Exclude_Parents : Boolean := False) return Boolean;
+--  Returns true if the Typ_Ent implements interface Iface_Ent
+function In_Assertion_Expression_Pragma (N : Node_Id) return Boolean;
+--  Returns True if node N appears within a pragma that acts as an assertion
+--  expression. See Sem_Prag for the list of qualifying pragmas.
+function In_Generic_Scope (E : Entity_Id) return Boolean;
+--  Returns True if entity E is inside a generic scope
+function In_Instance return Boolean;
+--  Returns True if the current scope is within a generic instance
+function In_Instance_Body return Boolean;
+--  Returns True if current scope is within the body of an instance, where
+--  several semantic checks (e.g. accessibility checks) are relaxed.
+function In_Instance_Not_Visible return Boolean;
+--  Returns True if current scope is with the private part or the body of
+--  an instance. Other semantic checks are suppressed in this context.
+function In_Instance_Visible_Part
+(Id : Entity_Id := Current_Scope) return Boolean;
+--  Returns True if arbitrary entity Id is within the visible part of a
+--  package instance, where several additional semantic checks apply.
+function In_Package_Body return Boolean;
+--  Returns True if current scope is within a package body
+function In_Pragma_Expression (N : Node_Id; Nam : Name_Id) return Boolean;
+--  Returns true if the expression N occurs within a pragma with name Nam
+function In_Pre_Post_Condition (N : Node_Id) return Boolean;
+--  Returns True if node N appears within a pre/postcondition pragma. Note
+--  the pragma Check equivalents are NOT considered.
+function In_Reverse_Storage_Order_Object (N : Node_Id) return Boolean;
+--  Returns True if N denotes a component or subcomponent in a record or
+--  array that has Reverse_Storage_Order.
+function In_Subprogram_Or_Concurrent_Unit return Boolean;
+--  Determines if the current scope is within a subprogram compilation unit
+--  (inside a subprogram declaration, subprogram body, or generic subprogram
+--  declaration) or within a task or protected body. The test is for
+--  appearing anywhere within such a construct (that is it does not need
+--  to be directly within).
+function In_Subtree (N : Node_Id; Root : Node_Id) return Boolean;
+--  Determine whether node N is within the subtree rooted at Root
+function In_Subtree
+(N     : Node_Id;
+Root1 : Node_Id;
+Root2 : Node_Id) return Boolean;
+--  Determine whether node N is within the subtree rooted at Root1 or Root2.
+--  This version is more efficient than calling the single root version of
+--  Is_Subtree twice.
+function In_Visible_Part (Scope_Id : Entity_Id) return Boolean;
+--  Determine whether a declaration occurs within the visible part of a
+--  package specification. The package must be on the scope stack, and the
+--  corresponding private part must not.
+function Incomplete_Or_Partial_View (Id : Entity_Id) return Entity_Id;
+--  Given the entity of a constant or a type, retrieve the incomplete or
+--  partial view of the same entity. Note that Id may not have a partial
+--  view in which case the function returns Empty.
+function Indexed_Component_Bit_Offset (N : Node_Id) return Uint;
+--  Given an N_Indexed_Component node, return the first bit position of the
+--  component if it is known at compile time. A value of No_Uint means that
+--  either the value is not yet known before back-end processing or it is
+--  not known at compile time after back-end processing.
+procedure Inherit_Rep_Item_Chain (Typ : Entity_Id; From_Typ : Entity_Id);
+--  Inherit the rep item chain of type From_Typ without clobbering any
+--  existing rep items on Typ's chain. Typ is the destination type.
+procedure Insert_Explicit_Dereference (N : Node_Id);
+--  In a context that requires a composite or subprogram type and where a
+--  prefix is an access type, rewrite the access type node N (which is the
+--  prefix, e.g. of an indexed component) as an explicit dereference.
+procedure Inspect_Deferred_Constant_Completion (Decls : List_Id);
+--  Examine all deferred constants in the declaration list Decls and check
+--  whether they have been completed by a full constant declaration or an
+--  Import pragma. Emit the error message if that is not the case.
+procedure Install_Generic_Formals (Subp_Id : Entity_Id);
+--  Install both the generic formal parameters and the formal parameters of
+--  generic subprogram Subp_Id into visibility.
+procedure Install_SPARK_Mode (Mode : SPARK_Mode_Type; Prag : Node_Id);
+--  Establish the SPARK_Mode and SPARK_Mode_Pragma currently in effect
+function Is_Actual_Out_Parameter (N : Node_Id) return Boolean;
+--  Determines if N is an actual parameter of out mode in a subprogram call
+function Is_Actual_Parameter (N : Node_Id) return Boolean;
+--  Determines if N is an actual parameter in a subprogram call
+function Is_Actual_Tagged_Parameter (N : Node_Id) return Boolean;
+--  Determines if N is an actual parameter of a formal of tagged type in a
+--  subprogram call.
+function Is_Aliased_View (Obj : Node_Id) return Boolean;
+--  Determine if Obj is an aliased view, i.e. the name of an object to which
+--  'Access or 'Unchecked_Access can apply. Note that this routine uses the
+--  rules of the language, it does not take into account the restriction
+--  No_Implicit_Aliasing, so it can return True if the restriction is active
+--  and Obj violates the restriction. The caller is responsible for calling
+--  Restrict.Check_No_Implicit_Aliasing if True is returned, but there is a
+--  requirement for obeying the restriction in the call context.
+function Is_Ancestor_Package
+(E1 : Entity_Id;
+E2 : Entity_Id) return Boolean;
+--  Determine whether package E1 is an ancestor of E2
+function Is_Atomic_Object (N : Node_Id) return Boolean;
+--  Determines if the given node denotes an atomic object in the sense of
+--  the legality checks described in RM C.6(12).
+function Is_Atomic_Or_VFA_Object (N : Node_Id) return Boolean;
+--  Determines if the given node is an atomic object (Is_Atomic_Object true)
+--  or else is an object for which VFA is present.
+function Is_Attribute_Result (N : Node_Id) return Boolean;
+--  Determine whether node N denotes attribute 'Result
+function Is_Attribute_Update (N : Node_Id) return Boolean;
+--  Determine whether node N denotes attribute 'Update
+function Is_Body_Or_Package_Declaration (N : Node_Id) return Boolean;
+--  Determine whether node N denotes a body or a package declaration
+function Is_Bounded_String (T : Entity_Id) return Boolean;
+--  True if T is a bounded string type. Used to make sure "=" composes
+--  properly for bounded string types.
+function Is_Constant_Bound (Exp : Node_Id) return Boolean;
+--  Exp is the expression for an array bound. Determines whether the
+--  bound is a compile-time known value, or a constant entity, or an
+--  enumeration literal, or an expression composed of constant-bound
+--  subexpressions which are evaluated by means of standard operators.
+function Is_Container_Element (Exp : Node_Id) return Boolean;
+--  This routine recognizes expressions that denote an element of one of
+--  the predefined containers, when the source only contains an indexing
+--  operation and an implicit dereference is inserted by the compiler.
+--  In the absence of this optimization, the indexing creates a temporary
+--  controlled cursor that sets the tampering bit of the container, and
+--  restricts the use of the convenient notation C (X) to contexts that
+--  do not check the tampering bit (e.g. C.Include (X, C (Y)). Exp is an
+--  explicit dereference. The transformation applies when it has the form
+--  F (X).Discr.all.
+function Is_Contract_Annotation (Item : Node_Id) return Boolean;
+--  Determine whether aspect specification or pragma Item is a contract
+--  annotation.
+function Is_Controlling_Limited_Procedure
+(Proc_Nam : Entity_Id) return Boolean;
+--  Ada 2005 (AI-345): Determine whether Proc_Nam is a primitive procedure
+--  of a limited interface with a controlling first parameter.
+function Is_CPP_Constructor_Call (N : Node_Id) return Boolean;
+--  Returns True if N is a call to a CPP constructor
+function Is_CCT_Instance
+(Ref_Id     : Entity_Id;
+Context_Id : Entity_Id) return Boolean;
+--  Subsidiary to the analysis of pragmas [Refined_]Depends and [Refined_]
+--  Global. Determine whether entity Ref_Id (which must represent either
+--  a protected type or a task type) denotes the current instance of a
+--  concurrent type. Context_Id denotes the associated context where the
+--  pragma appears.
+function Is_Child_Or_Sibling
+(Pack_1 : Entity_Id;
+Pack_2 : Entity_Id) return Boolean;
+--  Determine the following relations between two arbitrary packages:
+--    1) One package is the parent of a child package
+--    2) Both packages are siblings and share a common parent
+function Is_Concurrent_Interface (T : Entity_Id) return Boolean;
+--  First determine whether type T is an interface and then check whether
+--  it is of protected, synchronized or task kind.
+function Is_Current_Instance (N : Node_Id) return Boolean;
+--  Predicate is true if N legally denotes a type name within its own
+--  declaration. Prior to Ada 2012 this covered only synchronized type
+--  declarations. In Ada 2012 it also covers type and subtype declarations
+--  with aspects: Invariant, Predicate, and Default_Initial_Condition.
+function Is_Declaration (N : Node_Id) return Boolean;
+--  Determine whether arbitrary node N denotes a declaration
+function Is_Declaration_Other_Than_Renaming (N : Node_Id) return Boolean;
+--  Determine whether arbitrary node N denotes a non-renaming declaration
+function Is_Declared_Within_Variant (Comp : Entity_Id) return Boolean;
+--  Returns True iff component Comp is declared within a variant part
+function Is_Dependent_Component_Of_Mutable_Object
+(Object : Node_Id) return Boolean;
+--  Returns True if Object is the name of a subcomponent that depends on
+--  discriminants of a variable whose nominal subtype is unconstrained and
+--  not indefinite, and the variable is not aliased. Otherwise returns
+--  False. The nodes passed to this function are assumed to denote objects.
+function Is_Dereferenced (N : Node_Id) return Boolean;
+--  N is a subexpression node of an access type. This function returns true
+--  if N appears as the prefix of a node that does a dereference of the
+--  access value (selected/indexed component, explicit dereference or a
+--  slice), and false otherwise.
+function Is_Descendant_Of (T1 : Entity_Id; T2 : Entity_Id) return Boolean;
+--  Returns True if type T1 is a descendant of type T2, and false otherwise.
+--  This is the RM definition, a type is a descendant of another type if it
+--  is the same type or is derived from a descendant of the other type.
+function Is_Descendant_Of_Suspension_Object
+(Typ : Entity_Id) return Boolean;
+--  Determine whether type Typ is a descendant of type Suspension_Object
+--  defined in Ada.Synchronous_Task_Control. This version is different from
+--  Is_Descendant_Of as the detection of Suspension_Object does not involve
+--  an entity and by extension a call to RTSfind.
+function Is_Double_Precision_Floating_Point_Type
+(E : Entity_Id) return Boolean;
+--  Return whether E is a double precision floating point type,
+--  characterized by:
+--  . machine_radix = 2
+--  . machine_mantissa = 53
+--  . machine_emax = 2**10
+--  . machine_emin = 3 - machine_emax
+function Is_Effectively_Volatile (Id : Entity_Id) return Boolean;
+--  Determine whether a type or object denoted by entity Id is effectively
+--  volatile (SPARK RM 7.1.2). To qualify as such, the entity must be either
+--    * Volatile
+--    * An array type subject to aspect Volatile_Components
+--    * An array type whose component type is effectively volatile
+--    * A protected type
+--    * Descendant of type Ada.Synchronous_Task_Control.Suspension_Object
+function Is_Effectively_Volatile_Object (N : Node_Id) return Boolean;
+--  Determine whether an arbitrary node denotes an effectively volatile
+--  object (SPARK RM 7.1.2).
+function Is_Entry_Body (Id : Entity_Id) return Boolean;
+--  Determine whether entity Id is the body entity of an entry [family]
+function Is_Entry_Declaration (Id : Entity_Id) return Boolean;
+--  Determine whether entity Id is the spec entity of an entry [family]
+function Is_Expanded_Priority_Attribute (E : Entity_Id) return Boolean;
+--  Check whether a function in a call is an expanded priority attribute,
+--  which is transformed into an Rtsfind call to Get_Ceiling. This expansion
+--  does not take place in a configurable runtime.
+function Is_Expression_Function (Subp : Entity_Id) return Boolean;
+--  Determine whether subprogram [body] Subp denotes an expression function
+function Is_Expression_Function_Or_Completion
+(Subp : Entity_Id) return Boolean;
+--  Determine whether subprogram [body] Subp denotes an expression function
+--  or is completed by an expression function body.
+function Is_EVF_Expression (N : Node_Id) return Boolean;
+--  Determine whether node N denotes a reference to a formal parameter of
+--  a specific tagged type whose related subprogram is subject to pragma
+--  Extensions_Visible with value "False" (SPARK RM 6.1.7). Several other
+--  constructs fall under this category:
+--    1) A qualified expression whose operand is EVF
+--    2) A type conversion whose operand is EVF
+--    3) An if expression with at least one EVF dependent_expression
+--    4) A case expression with at least one EVF dependent_expression
+function Is_False (U : Uint) return Boolean;
+pragma Inline (Is_False);
+--  The argument is a Uint value which is the Boolean'Pos value of a Boolean
+--  operand (i.e. is either 0 for False, or 1 for True). This function tests
+--  if it is False (i.e. zero).
+function Is_Fixed_Model_Number (U : Ureal; T : Entity_Id) return Boolean;
+--  Returns True iff the number U is a model number of the fixed-point type
+--  T, i.e. if it is an exact multiple of Small.
+function Is_Fully_Initialized_Type (Typ : Entity_Id) return Boolean;
+--  Typ is a type entity. This function returns true if this type is fully
+--  initialized, meaning that an object of the type is fully initialized.
+--  Note that initialization resulting from use of pragma Normalize_Scalars
+--  does not count. Note that this is only used for the purpose of issuing
+--  warnings for objects that are potentially referenced uninitialized. This
+--  means that the result returned is not crucial, but should err on the
+--  side of thinking things are fully initialized if it does not know.
+function Is_Generic_Declaration_Or_Body (Decl : Node_Id) return Boolean;
+--  Determine whether arbitrary declaration Decl denotes a generic package,
+--  a generic subprogram or a generic body.
+function Is_Inherited_Operation (E : Entity_Id) return Boolean;
+--  E is a subprogram. Return True is E is an implicit operation inherited
+--  by a derived type declaration.
+function Is_Inherited_Operation_For_Type
+(E   : Entity_Id;
+Typ : Entity_Id) return Boolean;
+--  E is a subprogram. Return True is E is an implicit operation inherited
+--  by the derived type declaration for type Typ.
+function Is_Inlinable_Expression_Function (Subp : Entity_Id) return Boolean;
+--  Return True if Subp is an expression function that fulfills all the
+--  following requirements for inlining:
+--     1. pragma/aspect Inline_Always
+--     2. No formals
+--     3. No contracts
+--     4. No dispatching primitive
+--     5. Result subtype controlled (or with controlled components)
+--     6. Result subtype not subject to type-invariant checks
+--     7. Result subtype not a class-wide type
+--     8. Return expression naming an object global to the function
+--     9. Nominal subtype of the returned object statically compatible
+--        with the result subtype of the expression function.
+function Is_Iterator (Typ : Entity_Id) return Boolean;
+--  AI05-0139-2: Check whether Typ is one of the predefined interfaces in
+--  Ada.Iterator_Interfaces, or it is derived from one.
+function Is_Iterator_Over_Array (N : Node_Id) return Boolean;
+--  N is an iterator specification. Returns True iff N is an iterator over
+--  an array, either inside a loop of the form 'for X of A' or a quantified
+--  expression of the form 'for all/some X of A' where A is of array type.
+type Is_LHS_Result is (Yes, No, Unknown);
+function Is_LHS (N : Node_Id) return Is_LHS_Result;
+--  Returns Yes if N is definitely used as Name in an assignment statement.
+--  Returns No if N is definitely NOT used as a Name in an assignment
+--  statement. Returns Unknown if we can't tell at this stage (happens in
+--  the case where we don't know the type of N yet, and we have something
+--  like N.A := 3, where this counts as N being used on the left side of
+--  an assignment only if N is not an access type. If it is an access type
+--  then it is N.all.A that is assigned, not N.
+function Is_Library_Level_Entity (E : Entity_Id) return Boolean;
+--  A library-level declaration is one that is accessible from Standard,
+--  i.e. a library unit or an entity declared in a library package.
+function Is_Limited_Class_Wide_Type (Typ : Entity_Id) return Boolean;
+--  Determine whether a given type is a limited class-wide type, in which
+--  case it needs a Master_Id, because extensions of its designated type
+--  may include task components. A class-wide type that comes from a
+--  limited view must be treated in the same way.
+function Is_Local_Variable_Reference (Expr : Node_Id) return Boolean;
+--  Determines whether Expr is a reference to a variable or IN OUT mode
+--  parameter of the current enclosing subprogram.
+--  Why are OUT parameters not considered here ???
+function Is_Name_Reference (N : Node_Id) return Boolean;
+--  Determine whether arbitrary node N is a reference to a name. This is
+--  similar to Is_Object_Reference but returns True only if N can be renamed
+--  without the need for a temporary, the typical example of an object not
+--  in this category being a function call.
+function Is_Nontrivial_DIC_Procedure (Id : Entity_Id) return Boolean;
+--  Determine whether entity Id denotes the procedure that verifies the
+--  assertion expression of pragma Default_Initial_Condition and if it does,
+--  the encapsulated expression is nontrivial.
+function Is_Null_Record_Type (T : Entity_Id) return Boolean;
+--  Determine whether T is declared with a null record definition or a
+--  null component list.
+function Is_Object_Image (Prefix : Node_Id) return Boolean;
+--  Returns True if an 'Image, 'Wide_Image, or 'Wide_Wide_Image attribute
+--  is applied to a given object or named value prefix (see below).
+--  AI12-00124: The ARG has adopted the GNAT semantics of 'Img for scalar
+--  types, so that the prefix of any 'Image attribute can be an object, a
+--  named value, or a type, and there is no need for an argument in the
+--  case it is an object reference.
+function Is_Object_Reference (N : Node_Id) return Boolean;
+--  Determines if the tree referenced by N represents an object. Both
+--  variable and constant objects return True (compare Is_Variable).
+function Is_OK_Variable_For_Out_Formal (AV : Node_Id) return Boolean;
+--  Used to test if AV is an acceptable formal for an OUT or IN OUT formal.
+--  Note that the Is_Variable function is not quite the right test because
+--  this is a case in which conversions whose expression is a variable (in
+--  the Is_Variable sense) with an untagged type target are considered view
+--  conversions and hence variables.
+function Is_OK_Volatile_Context
+(Context : Node_Id;
+Obj_Ref : Node_Id) return Boolean;
+--  Determine whether node Context denotes a "non-interfering context" (as
+--  defined in SPARK RM 7.1.3(12)) where volatile reference Obj_Ref can
+--  safely reside.
+function Is_Package_Contract_Annotation (Item : Node_Id) return Boolean;
+--  Determine whether aspect specification or pragma Item is one of the
+--  following package contract annotations:
+--    Abstract_State
+--    Initial_Condition
+--    Initializes
+--    Refined_State
+function Is_Partially_Initialized_Type
+(Typ              : Entity_Id;
+Include_Implicit : Boolean := True) return Boolean;
+--  Typ is a type entity. This function returns true if this type is partly
+--  initialized, meaning that an object of the type is at least partly
+--  initialized (in particular in the record case, that at least one
+--  component has an initialization expression). Note that initialization
+--  resulting from the use of pragma Normalize_Scalars does not count.
+--  Include_Implicit controls whether implicit initialization of access
+--  values to null, and of discriminant values, is counted as making the
+--  type be partially initialized. For the default setting of True, these
+--  implicit cases do count, and discriminated types or types containing
+--  access values not explicitly initialized will return True. Otherwise
+--  if Include_Implicit is False, these cases do not count as making the
+--  type be partially initialized.
+function Is_Potentially_Unevaluated (N : Node_Id) return Boolean;
+--  Predicate to implement definition given in RM 6.1.1 (20/3)
+function Is_Potentially_Persistent_Type (T : Entity_Id) return Boolean;
+--  Determines if type T is a potentially persistent type. A potentially
+--  persistent type is defined (recursively) as a scalar type, an untagged
+--  record whose components are all of a potentially persistent type, or an
+--  array with all static constraints whose component type is potentially
+--  persistent. A private type is potentially persistent if the full type
+--  is potentially persistent.
+function Is_Preelaborable_Aggregate (Aggr : Node_Id) return Boolean;
+--  Determine whether aggregate Aggr violates the restrictions of
+--  preelaborable constructs as defined in ARM 10.2.1(5-9).
+function Is_Preelaborable_Construct (N : Node_Id) return Boolean;
+--  Determine whether arbitrary node N violates the restrictions of
+--  preelaborable constructs as defined in ARM 10.2.1(5-9).
+function Is_Protected_Self_Reference (N : Node_Id) return Boolean;
+--  Return True if node N denotes a protected type name which represents
+--  the current instance of a protected object according to RM 9.4(21/2).
+function Is_RCI_Pkg_Spec_Or_Body (Cunit : Node_Id) return Boolean;
+--  Return True if a compilation unit is the specification or the
+--  body of a remote call interface package.
+function Is_Remote_Access_To_Class_Wide_Type (E : Entity_Id) return Boolean;
+--  Return True if E is a remote access-to-class-wide type
+function Is_Remote_Access_To_Subprogram_Type (E : Entity_Id) return Boolean;
+--  Return True if E is a remote access to subprogram type
+function Is_Remote_Call (N : Node_Id) return Boolean;
+--  Return True if N denotes a potentially remote call
+function Is_Renamed_Entry (Proc_Nam : Entity_Id) return Boolean;
+--  Return True if Proc_Nam is a procedure renaming of an entry
+function Is_Renaming_Declaration (N : Node_Id) return Boolean;
+--  Determine whether arbitrary node N denotes a renaming declaration
+function Is_Reversible_Iterator (Typ : Entity_Id) return Boolean;
+--  AI05-0139-2: Check whether Typ is derived from the predefined interface
+--  Ada.Iterator_Interfaces.Reversible_Iterator.
+function Is_Selector_Name (N : Node_Id) return Boolean;
+--  Given an N_Identifier node N, determines if it is a Selector_Name.
+--  As described in Sinfo, Selector_Names are special because they
+--  represent use of the N_Identifier node for a true identifier, when
+--  normally such nodes represent a direct name.
+function Is_Single_Concurrent_Object (Id : Entity_Id) return Boolean;
+--  Determine whether arbitrary entity Id denotes the anonymous object
+--  created for a single protected or single task type.
+function Is_Single_Concurrent_Type (Id : Entity_Id) return Boolean;
+--  Determine whether arbitrary entity Id denotes a single protected or
+--  single task type.
+function Is_Single_Concurrent_Type_Declaration (N : Node_Id) return Boolean;
+--  Determine whether arbitrary node N denotes the declaration of a single
+--  protected type or single task type.
+function Is_Single_Precision_Floating_Point_Type
+(E : Entity_Id) return Boolean;
+--  Return whether E is a single precision floating point type,
+--  characterized by:
+--  . machine_radix = 2
+--  . machine_mantissa = 24
+--  . machine_emax = 2**7
+--  . machine_emin = 3 - machine_emax
+function Is_Single_Protected_Object (Id : Entity_Id) return Boolean;
+--  Determine whether arbitrary entity Id denotes the anonymous object
+--  created for a single protected type.
+function Is_Single_Task_Object (Id : Entity_Id) return Boolean;
+--  Determine whether arbitrary entity Id denotes the anonymous object
+--  created for a single task type.
+function Is_SPARK_05_Initialization_Expr (N : Node_Id) return Boolean;
+--  Determines if the tree referenced by N represents an initialization
+--  expression in SPARK 2005, suitable for initializing an object in an
+--  object declaration.
+function Is_SPARK_05_Object_Reference (N : Node_Id) return Boolean;
+--  Determines if the tree referenced by N represents an object in SPARK
+--  2005. This differs from Is_Object_Reference in that only variables,
+--  constants, formal parameters, and selected_components of those are
+--  valid objects in SPARK 2005.
+function Is_Specific_Tagged_Type (Typ : Entity_Id) return Boolean;
+--  Determine whether an arbitrary [private] type is specifically tagged
+function Is_Statement (N : Node_Id) return Boolean;
+pragma Inline (Is_Statement);
+--  Check if the node N is a statement node. Note that this includes
+--  the case of procedure call statements (unlike the direct use of
+--  the N_Statement_Other_Than_Procedure_Call subtype from Sinfo).
+--  Note that a label is *not* a statement, and will return False.
+function Is_Subprogram_Contract_Annotation (Item : Node_Id) return Boolean;
+--  Determine whether aspect specification or pragma Item is one of the
+--  following subprogram contract annotations:
+--    Contract_Cases
+--    Depends
+--    Extensions_Visible
+--    Global
+--    Post
+--    Post_Class
+--    Postcondition
+--    Pre
+--    Pre_Class
+--    Precondition
+--    Refined_Depends
+--    Refined_Global
+--    Refined_Post
+--    Test_Case
+function Is_Subprogram_Stub_Without_Prior_Declaration
+(N : Node_Id) return Boolean;
+--  Return True if N is a subprogram stub with no prior subprogram
+--  declaration.
+function Is_Suspension_Object (Id : Entity_Id) return Boolean;
+--  Determine whether arbitrary entity Id denotes Suspension_Object defined
+--  in Ada.Synchronous_Task_Control.
+function Is_Synchronized_Object (Id : Entity_Id) return Boolean;
+--  Determine whether entity Id denotes an object and if it does, whether
+--  this object is synchronized as specified in SPARK RM 9.1. To qualify as
+--  such, the object must be
+--    * Of a type that yields a synchronized object
+--    * An atomic object with enabled Async_Writers
+--    * A constant
+--    * A variable subject to pragma Constant_After_Elaboration
+function Is_Synchronized_Tagged_Type (E : Entity_Id) return Boolean;
+--  Returns True if E is a synchronized tagged type (AARM 3.9.4 (6/2))
+function Is_Transfer (N : Node_Id) return Boolean;
+--  Returns True if the node N is a statement which is known to cause an
+--  unconditional transfer of control at runtime, i.e. the following
+--  statement definitely will not be executed.
+function Is_True (U : Uint) return Boolean;
+pragma Inline (Is_True);
+--  The argument is a Uint value which is the Boolean'Pos value of a Boolean
+--  operand (i.e. is either 0 for False, or 1 for True). This function tests
+--  if it is True (i.e. non-zero).
+function Is_Unchecked_Conversion_Instance (Id : Entity_Id) return Boolean;
+--  Determine whether an arbitrary entity denotes an instance of function
+--  Ada.Unchecked_Conversion.
+function Is_Universal_Numeric_Type (T : Entity_Id) return Boolean;
+pragma Inline (Is_Universal_Numeric_Type);
+--  True if T is Universal_Integer or Universal_Real
+function Is_User_Defined_Equality (Id : Entity_Id) return Boolean;
+--  Determine whether an entity denotes a user-defined equality
+function Is_Validation_Variable_Reference (N : Node_Id) return Boolean;
+--  Determine whether N denotes a reference to a variable which captures the
+--  value of an object for validation purposes.
+function Is_Variable_Size_Array (E : Entity_Id) return Boolean;
+--  Returns true if E has variable size components
+function Is_Variable_Size_Record (E : Entity_Id) return Boolean;
+--  Returns true if E has variable size components
+function Is_Variable
+(N                 : Node_Id;
+Use_Original_Node : Boolean := True) return Boolean;
+--  Determines if the tree referenced by N represents a variable, i.e. can
+--  appear on the left side of an assignment. There is one situation (formal
+--  parameters) in which untagged type conversions are also considered
+--  variables, but Is_Variable returns False for such cases, since it has
+--  no knowledge of the context. Note that this is the point at which
+--  Assignment_OK is checked, and True is returned for any tree thus marked.
+--  Use_Original_Node is used to perform the test on Original_Node (N). By
+--  default is True since this routine is commonly invoked as part of the
+--  semantic analysis and it must not be disturbed by the rewriten nodes.
+function Is_Verifiable_DIC_Pragma (Prag : Node_Id) return Boolean;
+--  Determine whether pragma Default_Initial_Condition denoted by Prag has
+--  an assertion expression which should be verified at runtime.
+function Is_Visibly_Controlled (T : Entity_Id) return Boolean;
+--  Check whether T is derived from a visibly controlled type. This is true
+--  if the root type is declared in Ada.Finalization. If T is derived
+--  instead from a private type whose full view is controlled, an explicit
+--  Initialize/Adjust/Finalize subprogram does not override the inherited
+--  one.
+function Is_Volatile_Function (Func_Id : Entity_Id) return Boolean;
+--  Determine whether [generic] function Func_Id is subject to enabled
+--  pragma Volatile_Function. Protected functions are treated as volatile
+--  (SPARK RM 7.1.2).
+function Is_Volatile_Object (N : Node_Id) return Boolean;
+--  Determines if the given node denotes an volatile object in the sense of
+--  the legality checks described in RM C.6(12). Note that the test here is
+--  for something actually declared as volatile, not for an object that gets
+--  treated as volatile (see Einfo.Treat_As_Volatile).
+generic
+with procedure Handle_Parameter (Formal : Entity_Id; Actual : Node_Id);
+procedure Iterate_Call_Parameters (Call : Node_Id);
+--  Calls Handle_Parameter for each pair of formal and actual parameters of
+--  a function, procedure, or entry call.
+function Itype_Has_Declaration (Id : Entity_Id) return Boolean;
+--  Applies to Itypes. True if the Itype is attached to a declaration for
+--  the type through its Parent field, which may or not be present in the
+--  tree.
+procedure Kill_Current_Values (Last_Assignment_Only : Boolean := False);
+--  This procedure is called to clear all constant indications from all
+--  entities in the current scope and in any parent scopes if the current
+--  scope is a block or a package (and that recursion continues to the top
+--  scope that is not a block or a package). This is used when the
+--  sequential flow-of-control assumption is violated (occurrence of a
+--  label, head of a loop, or start of an exception handler). The effect of
+--  the call is to clear the Current_Value field (but we do not need to
+--  clear the Is_True_Constant flag, since that only gets reset if there
+--  really is an assignment somewhere in the entity scope). This procedure
+--  also calls Kill_All_Checks, since this is a special case of needing to
+--  forget saved values. This procedure also clears the Is_Known_Null and
+--  Is_Known_Non_Null and Is_Known_Valid flags in variables, constants or
+--  parameters since these are also not known to be trustable any more.
+--
+--  The Last_Assignment_Only flag is set True to clear only Last_Assignment
+--  fields and leave other fields unchanged. This is used when we encounter
+--  an unconditional flow of control change (return, goto, raise). In such
+--  cases we don't need to clear the current values, since it may be that
+--  the flow of control change occurs in a conditional context, and if it
+--  is not taken, then it is just fine to keep the current values. But the
+--  Last_Assignment field is different, if we have a sequence assign-to-v,
+--  conditional-return, assign-to-v, we do not want to complain that the
+--  second assignment clobbers the first.
+procedure Kill_Current_Values
+(Ent                  : Entity_Id;
+Last_Assignment_Only : Boolean := False);
+--  This performs the same processing as described above for the form with
+--  no argument, but for the specific entity given. The call has no effect
+--  if the entity Ent is not for an object. Last_Assignment_Only has the
+--  same meaning as for the call with no Ent.
+procedure Kill_Size_Check_Code (E : Entity_Id);
+--  Called when an address clause or pragma Import is applied to an entity.
+--  If the entity is a variable or a constant, and size check code is
+--  present, this size check code is killed, since the object will not be
+--  allocated by the program.
+function Known_Non_Null (N : Node_Id) return Boolean;
+--  Given a node N for a subexpression of an access type, determines if
+--  this subexpression yields a value that is known at compile time to
+--  be non-null and returns True if so. Returns False otherwise. It is
+--  an error to call this function if N is not of an access type.
+function Known_Null (N : Node_Id) return Boolean;
+--  Given a node N for a subexpression of an access type, determines if this
+--  subexpression yields a value that is known at compile time to be null
+--  and returns True if so. Returns False otherwise. It is an error to call
+--  this function if N is not of an access type.
+function Known_To_Be_Assigned (N : Node_Id) return Boolean;
+--  The node N is an entity reference. This function determines whether the
+--  reference is for sure an assignment of the entity, returning True if
+--  so. This differs from May_Be_Lvalue in that it defaults in the other
+--  direction. Cases which may possibly be assignments but are not known to
+--  be may return True from May_Be_Lvalue, but False from this function.
+function Last_Source_Statement (HSS : Node_Id) return Node_Id;
+--  HSS is a handled statement sequence. This function returns the last
+--  statement in Statements (HSS) that has Comes_From_Source set. If no
+--  such statement exists, Empty is returned.
+procedure Mark_Coextensions (Context_Nod : Node_Id; Root_Nod : Node_Id);
+--  Given a node which designates the context of analysis and an origin in
+--  the tree, traverse from Root_Nod and mark all allocators as either
+--  dynamic or static depending on Context_Nod. Any incorrect marking is
+--  cleaned up during resolution.
+procedure Mark_Elaboration_Attributes
+(N_Id   : Node_Or_Entity_Id;
+Checks : Boolean := False;
+Level  : Boolean := False;
+Modes  : Boolean := False);
+--  Preserve relevant elaboration-related properties of the context in
+--  arbitrary entity or node N_Id. When flag Checks is set, the routine
+--  saves the status of Elaboration_Check. When flag Level is set, the
+--  routine captures the declaration level of N_Id if applicable. When
+--  flag Modes is set, the routine saves the Ghost and SPARK modes in
+--  effect if applicable.
+function Matching_Static_Array_Bounds
+(L_Typ : Node_Id;
+R_Typ : Node_Id) return Boolean;
+--  L_Typ and R_Typ are two array types. Returns True when they have the
+--  same number of dimensions, and the same static bounds for each index
+--  position.
+function May_Be_Lvalue (N : Node_Id) return Boolean;
+--  Determines if N could be an lvalue (e.g. an assignment left hand side).
+--  An lvalue is defined as any expression which appears in a context where
+--  a name is required by the syntax, and the identity, rather than merely
+--  the value of the node is needed (for example, the prefix of an Access
+--  attribute is in this category). Note that, as implied by the name, this
+--  test is conservative. If it cannot be sure that N is NOT an lvalue, then
+--  it returns True. It tries hard to get the answer right, but it is hard
+--  to guarantee this in all cases. Note that it is more possible to give
+--  correct answer if the tree is fully analyzed.
+function Might_Raise (N : Node_Id) return Boolean;
+--  True if evaluation of N might raise an exception. This is conservative;
+--  if we're not sure, we return True. If N is a subprogram body, this is
+--  about whether execution of that body can raise.
+function Nearest_Enclosing_Instance (E : Entity_Id) return Entity_Id;
+--  Return the entity of the nearest enclosing instance which encapsulates
+--  entity E. If no such instance exits, return Empty.
+function Needs_One_Actual (E : Entity_Id) return Boolean;
+--  Returns True if a function has defaults for all but its first formal,
+--  which is a controlling formal. Used in Ada 2005 mode to solve the
+--  syntactic ambiguity that results from an indexing of a function call
+--  that returns an array, so that Obj.F (X, Y) may mean F (Ob) (X, Y).
+function New_Copy_List_Tree (List : List_Id) return List_Id;
+--  Copy recursively an analyzed list of nodes. Uses New_Copy_Tree defined
+--  below. As for New_Copy_Tree, it is illegal to attempt to copy extended
+--  nodes (entities) either directly or indirectly using this function.
+function New_Copy_Tree
+(Source    : Node_Id;
+Map       : Elist_Id   := No_Elist;
+New_Sloc  : Source_Ptr := No_Location;
+New_Scope : Entity_Id  := Empty) return Node_Id;
+--  Perform a deep copy of the subtree rooted at Source. Entities, itypes,
+--  and nodes are handled separately as follows:
+--
+--    * A node is replicated by first creating a shallow copy, then copying
+--      its syntactic fields, where all Parent pointers of the fields are
+--      updated to refer to the copy. In addition, the following semantic
+--      fields are recreated after the replication takes place.
+--
+--        First_Named_Actual
+--        First_Real_Statement
+--        Next_Named_Actual
+--
+--      If applicable, the Etype field (if any) is updated to refer to a
+--      local itype or type (see below).
+--
+--    * An entity defined within an N_Expression_With_Actions node in the
+--      subtree is given a new entity, and all references to the original
+--      entity are updated to refer to the new entity. In addition, the
+--      following semantic fields are replicated and/or updated to refer
+--      to a local entity or itype.
+--
+--        Discriminant_Constraint
+--        Etype
+--        First_Index
+--        Next_Entity
+--        Packed_Array_Impl_Type
+--        Scalar_Range
+--        Scope
+--
+--      Note that currently no other expression can define entities.
+--
+--    * An itype whose Associated_Node_For_Itype node is in the subtree
+--      is given a new entity, and all references to the original itype
+--      are updated to refer to the new itype. In addition, the following
+--      semantic fields are replicated and/or updated to refer to a local
+--      entity or itype.
+--
+--        Discriminant_Constraint
+--        Etype
+--        First_Index
+--        Next_Entity
+--        Packed_Array_Impl_Type
+--        Scalar_Range
+--        Scope
+--
+--      The Associated_Node_For_Itype is updated to refer to a replicated
+--      node.
+--
+--  The routine can replicate both analyzed and unanalyzed trees. Copying an
+--  Empty or Error node yields the same node.
+--
+--  Parameter Map may be used to specify a set of mappings between entities.
+--  These mappings are then taken into account when replicating entities.
+--  The format of Map must be as follows:
+--
+--    old entity 1
+--    new entity to replace references to entity 1
+--    old entity 2
+--    new entity to replace references to entity 2
+--    ...
+--
+--  Map and its contents are left unchanged.
+--
+--  Parameter New_Sloc may be used to specify a new source location for all
+--  replicated entities, itypes, and nodes. The Comes_From_Source indicator
+--  is defaulted if a new source location is provided.
+--
+--  Parameter New_Scope may be used to specify a new scope for all copied
+--  entities and itypes.
+function New_External_Entity
+(Kind         : Entity_Kind;
+Scope_Id     : Entity_Id;
+Sloc_Value   : Source_Ptr;
+Related_Id   : Entity_Id;
+Suffix       : Character;
+Suffix_Index : Nat := 0;
+Prefix       : Character := ' ') return Entity_Id;
+--  This function creates an N_Defining_Identifier node for an internal
+--  created entity, such as an implicit type or subtype, or a record
+--  initialization procedure. The entity name is constructed with a call
+--  to New_External_Name (Related_Id, Suffix, Suffix_Index, Prefix), so
+--  that the generated name may be referenced as a public entry, and the
+--  Is_Public flag is set if needed (using Set_Public_Status). If the
+--  entity is for a type or subtype, the size/align fields are initialized
+--  to unknown (Uint_0).
+function New_Internal_Entity
+(Kind       : Entity_Kind;
+Scope_Id   : Entity_Id;
+Sloc_Value : Source_Ptr;
+Id_Char    : Character) return Entity_Id;
+--  This function is similar to New_External_Entity, except that the
+--  name is constructed by New_Internal_Name (Id_Char). This is used
+--  when the resulting entity does not have to be referenced as a
+--  public entity (and in this case Is_Public is not set).
+procedure Next_Actual (Actual_Id : in out Node_Id);
+pragma Inline (Next_Actual);
+--  Next_Actual (N) is equivalent to N := Next_Actual (N). Note that we
+--  inline this procedural form, but not the functional form that follows.
+function Next_Actual (Actual_Id : Node_Id) return Node_Id;
+--  Find next actual parameter in declaration order. As described for
+--  First_Actual, this is the next actual in the declaration order, not
+--  the call order, so this does not correspond to simply taking the
+--  next entry of the Parameter_Associations list. The argument is an
+--  actual previously returned by a call to First_Actual or Next_Actual.
+--  Note that the result produced is always an expression, not a parameter
+--  association node, even if named notation was used.
+procedure Next_Global (Node : in out Node_Id);
+pragma Inline (Next_Actual);
+--  Next_Global (N) is equivalent to N := Next_Global (N). Note that we
+--  inline this procedural form, but not the functional form that follows.
+function Next_Global (Node : Node_Id) return Node_Id;
+--  Node is a global item from a list, obtained through calling First_Global
+--  and possibly Next_Global a number of times. Returns the next global item
+--  with the same mode.
+function No_Heap_Finalization (Typ : Entity_Id) return Boolean;
+--  Determine whether type Typ is subject to pragma No_Heap_Finalization
+procedure Normalize_Actuals
+(N       : Node_Id;
+S       : Entity_Id;
+Report  : Boolean;
+Success : out Boolean);
+--  Reorders lists of actuals according to names of formals, value returned
+--  in Success indicates success of reordering. For more details, see body.
+--  Errors are reported only if Report is set to True.
+procedure Note_Possible_Modification (N : Node_Id; Sure : Boolean);
+--  This routine is called if the sub-expression N maybe the target of
+--  an assignment (e.g. it is the left side of an assignment, used as
+--  an out parameters, or used as prefixes of access attributes). It
+--  sets May_Be_Modified in the associated entity if there is one,
+--  taking into account the rule that in the case of renamed objects,
+--  it is the flag in the renamed object that must be set.
+--
+--  The parameter Sure is set True if the modification is sure to occur
+--  (e.g. target of assignment, or out parameter), and to False if the
+--  modification is only potential (e.g. address of entity taken).
+function Null_To_Null_Address_Convert_OK
+(N   : Node_Id;
+Typ : Entity_Id := Empty) return Boolean;
+--  Return True if we are compiling in relaxed RM semantics mode and:
+--   1) N is a N_Null node and Typ is a descendant of System.Address, or
+--   2) N is a comparison operator, one of the operands is null, and the
+--      type of the other operand is a descendant of System.Address.
+function Number_Of_Elements_In_Array (T : Entity_Id) return Int;
+--  Returns the number of elements in the array T if the index bounds of T
+--  is known at compile time. If the bounds are not known at compile time,
+--  the function returns the value zero.
+function Object_Access_Level (Obj : Node_Id) return Uint;
+--  Return the accessibility level of the view of the object Obj. For
+--  convenience, qualified expressions applied to object names are also
+--  allowed as actuals for this function.
+function Original_Aspect_Pragma_Name (N : Node_Id) return Name_Id;
+--  Retrieve the name of aspect or pragma N, taking into account a possible
+--  rewrite and whether the pragma is generated from an aspect as the names
+--  may be different. The routine also deals with 'Class in which case it
+--  returns the following values:
+--
+--    Invariant            -> Name_uInvariant
+--    Post'Class           -> Name_uPost
+--    Pre'Class            -> Name_uPre
+--    Type_Invariant       -> Name_uType_Invariant
+--    Type_Invariant'Class -> Name_uType_Invariant
+function Original_Corresponding_Operation (S : Entity_Id) return Entity_Id;
+--  [Ada 2012: AI05-0125-1]: If S is an inherited dispatching primitive S2,
+--  or overrides an inherited dispatching primitive S2, the original
+--  corresponding operation of S is the original corresponding operation of
+--  S2. Otherwise, it is S itself.
+procedure Output_Entity (Id : Entity_Id);
+--  Print entity Id to standard output. The name of the entity appears in
+--  fully qualified form.
+--
+--  WARNING: this routine should be used in debugging scenarios such as
+--  tracking down undefined symbols as it is fairly low level.
+procedure Output_Name (Nam : Name_Id; Scop : Entity_Id := Current_Scope);
+--  Print name Nam to standard output. The name appears in fully qualified
+--  form assuming it appears in scope Scop. Note that this may not reflect
+--  the final qualification as the entity which carries the name may be
+--  relocated to a different scope.
+--
+--  WARNING: this routine should be used in debugging scenarios such as
+--  tracking down undefined symbols as it is fairly low level.
+function Policy_In_Effect (Policy : Name_Id) return Name_Id;
+--  Given a policy, return the policy identifier associated with it. If no
+--  such policy is in effect, the value returned is No_Name.
+function Predicate_Tests_On_Arguments (Subp : Entity_Id) return Boolean;
+--  Subp is the entity for a subprogram call. This function returns True if
+--  predicate tests are required for the arguments in this call (this is the
+--  normal case). It returns False for special cases where these predicate
+--  tests should be skipped (see body for details).
+function Primitive_Names_Match (E1, E2 : Entity_Id) return Boolean;
+--  Returns True if the names of both entities correspond with matching
+--  primitives. This routine includes support for the case in which one
+--  or both entities correspond with entities built by Derive_Subprogram
+--  with a special name to avoid being overridden (i.e. return true in case
+--  of entities with names "nameP" and "name" or vice versa).
+function Private_Component (Type_Id : Entity_Id) return Entity_Id;
+--  Returns some private component (if any) of the given Type_Id.
+--  Used to enforce the rules on visibility of operations on composite
+--  types, that depend on the full view of the component type. For a
+--  record type there may be several such components, we just return
+--  the first one.
+procedure Process_End_Label
+(N   : Node_Id;
+Typ : Character;
+Ent : Entity_Id);
+--  N is a node whose End_Label is to be processed, generating all
+--  appropriate cross-reference entries, and performing style checks
+--  for any identifier references in the end label. Typ is either
+--  'e' or 't indicating the type of the cross-reference entity
+--  (e for spec, t for body, see Lib.Xref spec for details). The
+--  parameter Ent gives the entity to which the End_Label refers,
+--  and to which cross-references are to be generated.
+procedure Propagate_Concurrent_Flags
+(Typ      : Entity_Id;
+Comp_Typ : Entity_Id);
+--  Set Has_Task, Has_Protected and Has_Timing_Event on Typ when the flags
+--  are set on Comp_Typ. This follows the definition of these flags which
+--  are set (recursively) on any composite type which has a component marked
+--  by one of these flags. This procedure can only set flags for Typ, and
+--  never clear them. Comp_Typ is the type of a component or a parent.
+procedure Propagate_DIC_Attributes
+(Typ      : Entity_Id;
+From_Typ : Entity_Id);
+--  Inherit all Default_Initial_Condition-related attributes from type
+--  From_Typ. Typ is the destination type.
+procedure Propagate_Invariant_Attributes
+(Typ      : Entity_Id;
+From_Typ : Entity_Id);
+--  Inherit all invariant-related attributes form type From_Typ. Typ is the
+--  destination type.
+procedure Record_Possible_Part_Of_Reference
+(Var_Id : Entity_Id;
+Ref    : Node_Id);
+--  Save reference Ref to variable Var_Id when the variable is subject to
+--  pragma Part_Of. If the variable is known to be a constituent of a single
+--  protected/task type, the legality of the reference is verified and the
+--  save does not take place.
+function Referenced (Id : Entity_Id; Expr : Node_Id) return Boolean;
+--  Determine whether entity Id is referenced within expression Expr
+function References_Generic_Formal_Type (N : Node_Id) return Boolean;
+--  Returns True if the expression Expr contains any references to a generic
+--  type. This can only happen within a generic template.
+procedure Remove_Entity (Id : Entity_Id);
+--  Remove arbitrary entity Id from both the homonym and scope chains. Use
+--  Remove_Overloaded_Entity for overloadable entities. Note: the removal
+--  performed by this routine does not affect the visibility of existing
+--  homonyms.
+procedure Remove_Homonym (E : Entity_Id);
+--  Removes E from the homonym chain
+procedure Remove_Overloaded_Entity (Id : Entity_Id);
+--  Remove arbitrary entity Id from the homonym chain, the scope chain and
+--  the primitive operations list of the associated controlling type. Use
+--  Remove_Entity for non-overloadable entities. Note: the removal performed
+--  by this routine does not affect the visibility of existing homonyms.
+function Remove_Suffix (E : Entity_Id; Suffix : Character) return Name_Id;
+--  Returns the name of E without Suffix
+procedure Replace_Null_By_Null_Address (N : Node_Id);
+--  N is N_Null or a binary comparison operator, we are compiling in relaxed
+--  RM semantics mode, and one of the operands is null. Replace null with
+--  System.Null_Address.
+function Rep_To_Pos_Flag (E : Entity_Id; Loc : Source_Ptr) return Node_Id;
+--  This is used to construct the second argument in a call to Rep_To_Pos
+--  which is Standard_True if range checks are enabled (E is an entity to
+--  which the Range_Checks_Suppressed test is applied), and Standard_False
+--  if range checks are suppressed. Loc is the location for the node that
+--  is returned (which is a New_Occurrence of the appropriate entity).
+--
+--  Note: one might think that it would be fine to always use True and
+--  to ignore the suppress in this case, but it is generally better to
+--  believe a request to suppress exceptions if possible, and further
+--  more there is at least one case in the generated code (the code for
+--  array assignment in a loop) that depends on this suppression.
+procedure Require_Entity (N : Node_Id);
+--  N is a node which should have an entity value if it is an entity name.
+--  If not, then check if there were previous errors. If so, just fill
+--  in with Any_Id and ignore. Otherwise signal a program error exception.
+--  This is used as a defense mechanism against ill-formed trees caused by
+--  previous errors (particularly in -gnatq mode).
+function Requires_Transient_Scope (Id : Entity_Id) return Boolean;
+--  Id is a type entity. The result is True when temporaries of this type
+--  need to be wrapped in a transient scope to be reclaimed properly when a
+--  secondary stack is in use. Examples of types requiring such wrapping are
+--  controlled types and variable-sized types including unconstrained
+--  arrays.
+procedure Reset_Analyzed_Flags (N : Node_Id);
+--  Reset the Analyzed flags in all nodes of the tree whose root is N
+procedure Restore_SPARK_Mode (Mode : SPARK_Mode_Type; Prag : Node_Id);
+--  Set the current SPARK_Mode to Mode and SPARK_Mode_Pragma to Prag. This
+--  routine must be used in tandem with Set_SPARK_Mode.
+function Returns_Unconstrained_Type (Subp : Entity_Id) return Boolean;
+--  Return true if Subp is a function that returns an unconstrained type
+function Root_Type_Of_Full_View (T : Entity_Id) return Entity_Id;
+--  Similar to attribute Root_Type, but this version always follows the
+--  Full_View of a private type (if available) while searching for the
+--  ultimate derivation ancestor.
+function Safe_To_Capture_Value
+(N    : Node_Id;
+Ent  : Entity_Id;
+Cond : Boolean := False) return Boolean;
+--  The caller is interested in capturing a value (either the current value,
+--  or an indication that the value is non-null) for the given entity Ent.
+--  This value can only be captured if sequential execution semantics can be
+--  properly guaranteed so that a subsequent reference will indeed be sure
+--  that this current value indication is correct. The node N is the
+--  construct which resulted in the possible capture of the value (this
+--  is used to check if we are in a conditional).
+--
+--  Cond is used to skip the test for being inside a conditional. It is used
+--  in the case of capturing values from if/while tests, which already do a
+--  proper job of handling scoping issues without this help.
+--
+--  The only entities whose values can be captured are OUT and IN OUT formal
+--  parameters, and variables unless Cond is True, in which case we also
+--  allow IN formals, loop parameters and constants, where we cannot ever
+--  capture actual value information, but we can capture conditional tests.
+function Same_Name (N1, N2 : Node_Id) return Boolean;
+--  Determine if two (possibly expanded) names are the same name. This is
+--  a purely syntactic test, and N1 and N2 need not be analyzed.
+function Same_Object (Node1, Node2 : Node_Id) return Boolean;
+--  Determine if Node1 and Node2 are known to designate the same object.
+--  This is a semantic test and both nodes must be fully analyzed. A result
+--  of True is decisively correct. A result of False does not necessarily
+--  mean that different objects are designated, just that this could not
+--  be reliably determined at compile time.
+function Same_Type (T1, T2 : Entity_Id) return Boolean;
+--  Determines if T1 and T2 represent exactly the same type. Two types
+--  are the same if they are identical, or if one is an unconstrained
+--  subtype of the other, or they are both common subtypes of the same
+--  type with identical constraints. The result returned is conservative.
+--  It is True if the types are known to be the same, but a result of
+--  False is indecisive (e.g. the compiler may not be able to tell that
+--  two constraints are identical).
+function Same_Value (Node1, Node2 : Node_Id) return Boolean;
+--  Determines if Node1 and Node2 are known to be the same value, which is
+--  true if they are both compile time known values and have the same value,
+--  or if they are the same object (in the sense of function Same_Object).
+--  A result of False does not necessarily mean they have different values,
+--  just that it is not possible to determine they have the same value.
+function Scalar_Part_Present (T : Entity_Id) return Boolean;
+--  Tests if type T can be determined at compile time to have at least one
+--  scalar part in the sense of the Valid_Scalars attribute. Returns True if
+--  this is the case, and False if no scalar parts are present (meaning that
+--  the result of Valid_Scalars applied to T is always vacuously True).
+function Scope_Within
+(Inner : Entity_Id;
+Outer : Entity_Id) return Boolean;
+--  Determine whether scope Inner appears within scope Outer. Note that
+--  scopes are partially ordered, so Scope_Within (A, B) and Scope_Within
+--  (B, A) may both return False.
+function Scope_Within_Or_Same
+(Inner : Entity_Id;
+Outer : Entity_Id) return Boolean;
+--  Determine whether scope Inner appears within scope Outer or both renote
+--  the same scope. Note that scopes are partially ordered, so Scope_Within
+--  (A, B) and Scope_Within (B, A) may both return False.
+procedure Set_Convention (E : Entity_Id; Val : Convention_Id);
+--  Same as Basic_Set_Convention, but with an extra check for access types.
+--  In particular, if E is an access-to-subprogram type, and Val is a
+--  foreign convention, then we set Can_Use_Internal_Rep to False on E.
+--  Also, if the Etype of E is set and is an anonymous access type with
+--  no convention set, this anonymous type inherits the convention of E.
+procedure Set_Current_Entity (E : Entity_Id);
+pragma Inline (Set_Current_Entity);
+--  Establish the entity E as the currently visible definition of its
+--  associated name (i.e. the Node_Id associated with its name).
+procedure Set_Debug_Info_Needed (T : Entity_Id);
+--  Sets the Debug_Info_Needed flag on entity T , and also on any entities
+--  that are needed by T (for an object, the type of the object is needed,
+--  and for a type, various subsidiary types are needed -- see body for
+--  details). Never has any effect on T if the Debug_Info_Off flag is set.
+--  This routine should always be used instead of Set_Needs_Debug_Info to
+--  ensure that subsidiary entities are properly handled.
+procedure Set_Entity_With_Checks (N : Node_Id; Val : Entity_Id);
+--  This procedure has the same calling sequence as Set_Entity, but it
+--  performs additional checks as follows:
+--
+--    If Style_Check is set, then it calls a style checking routine which
+--    can check identifier spelling style. This procedure also takes care
+--    of checking the restriction No_Implementation_Identifiers.
+--
+--    If restriction No_Abort_Statements is set, then it checks that the
+--    entity is not Ada.Task_Identification.Abort_Task.
+--
+--    If restriction No_Dynamic_Attachment is set, then it checks that the
+--    entity is not one of the restricted names for this restriction.
+--
+--    If restriction No_Long_Long_Integers is set, then it checks that the
+--    entity is not Standard.Long_Long_Integer.
+--
+--    If restriction No_Implementation_Identifiers is set, then it checks
+--    that the entity is not implementation defined.
+procedure Set_Name_Entity_Id (Id : Name_Id; Val : Entity_Id);
+pragma Inline (Set_Name_Entity_Id);
+--  Sets the Entity_Id value associated with the given name, which is the
+--  Id of the innermost visible entity with the given name. See the body
+--  of package Sem_Ch8 for further details on the handling of visibility.
+procedure Set_Next_Actual (Ass1_Id : Node_Id; Ass2_Id : Node_Id);
+--  The arguments may be parameter associations, whose descendants
+--  are the optional formal name and the actual parameter. Positional
+--  parameters are already members of a list, and do not need to be
+--  chained separately. See also First_Actual and Next_Actual.
+procedure Set_Optimize_Alignment_Flags (E : Entity_Id);
+pragma Inline (Set_Optimize_Alignment_Flags);
+--  Sets Optimize_Alignment_Space/Time flags in E from current settings
+procedure Set_Public_Status (Id : Entity_Id);
+--  If an entity (visible or otherwise) is defined in a library
+--  package, or a package that is itself public, then this subprogram
+--  labels the entity public as well.
+procedure Set_Referenced_Modified (N : Node_Id; Out_Param : Boolean);
+--  N is the node for either a left hand side (Out_Param set to False),
+--  or an Out or In_Out parameter (Out_Param set to True). If there is
+--  an assignable entity being referenced, then the appropriate flag
+--  (Referenced_As_LHS if Out_Param is False, Referenced_As_Out_Parameter
+--  if Out_Param is True) is set True, and the other flag set False.
+procedure Set_Rep_Info (T1 : Entity_Id; T2 : Entity_Id);
+pragma Inline (Set_Rep_Info);
+--  Copies the Is_Atomic, Is_Independent and Is_Volatile_Full_Access flags
+--  from sub(type) entity T2 to (sub)type entity T1, as well as Is_Volatile
+--  if T1 is a base type.
+procedure Set_Scope_Is_Transient (V : Boolean := True);
+--  Set the flag Is_Transient of the current scope
+procedure Set_Size_Info (T1, T2 : Entity_Id);
+pragma Inline (Set_Size_Info);
+--  Copies the Esize field and Has_Biased_Representation flag from sub(type)
+--  entity T2 to (sub)type entity T1. Also copies the Is_Unsigned_Type flag
+--  in the fixed-point and discrete cases, and also copies the alignment
+--  value from T2 to T1. It does NOT copy the RM_Size field, which must be
+--  separately set if this is required to be copied also.
+procedure Set_SPARK_Mode (Context : Entity_Id);
+--  Establish the SPARK_Mode and SPARK_Mode_Pragma (if any) of a package or
+--  a subprogram denoted by Context. This routine must be used in tandem
+--  with Restore_SPARK_Mode.
+function Scope_Is_Transient return Boolean;
+--  True if the current scope is transient
+function Should_Ignore_Pragma_Par (Prag_Name : Name_Id) return Boolean;
+function Should_Ignore_Pragma_Sem (N : Node_Id) return Boolean;
+--  True if we should ignore pragmas with the specified name. In particular,
+--  this returns True if pragma Ignore_Pragma applies, and we are not in a
+--  predefined unit. The _Par version should be called only from the parser;
+--  the _Sem version should be called only during semantic analysis.
+function Static_Boolean (N : Node_Id) return Uint;
+--  This function analyzes the given expression node and then resolves it
+--  as Standard.Boolean. If the result is static, then Uint_1 or Uint_0 is
+--  returned corresponding to the value, otherwise an error message is
+--  output and No_Uint is returned.
+function Static_Integer (N : Node_Id) return Uint;
+--  This function analyzes the given expression node and then resolves it
+--  as any integer type. If the result is static, then the value of the
+--  universal expression is returned, otherwise an error message is output
+--  and a value of No_Uint is returned.
+function Statically_Different (E1, E2 : Node_Id) return Boolean;
+--  Return True if it can be statically determined that the Expressions
+--  E1 and E2 refer to different objects
+function Subject_To_Loop_Entry_Attributes (N : Node_Id) return Boolean;
+--  Determine whether node N is a loop statement subject to at least one
+--  'Loop_Entry attribute.
+function Subprogram_Access_Level (Subp : Entity_Id) return Uint;
+--  Return the accessibility level of the view denoted by Subp
+function Support_Atomic_Primitives (Typ : Entity_Id) return Boolean;
+--  Return True if Typ supports the GCC built-in atomic operations (i.e. if
+--  Typ is properly sized and aligned).
+procedure Trace_Scope (N : Node_Id; E : Entity_Id; Msg : String);
+--  Print debugging information on entry to each unit being analyzed
+procedure Transfer_Entities (From : Entity_Id; To : Entity_Id);
+--  Move a list of entities from one scope to another, and recompute
+--  Is_Public based upon the new scope.
+function Type_Access_Level (Typ : Entity_Id) return Uint;
+--  Return the accessibility level of Typ
+function Type_Without_Stream_Operation
+(T  : Entity_Id;
+Op : TSS_Name_Type := TSS_Null) return Entity_Id;
+--  AI05-0161: In Ada 2012, if the restriction No_Default_Stream_Attributes
+--  is active then we cannot generate stream subprograms for composite types
+--  with elementary subcomponents that lack user-defined stream subprograms.
+--  This predicate determines whether a type has such an elementary
+--  subcomponent. If Op is TSS_Null, a type that lacks either Read or Write
+--  prevents the construction of a composite stream operation. If Op is
+--  specified we check only for the given stream operation.
+function Unique_Defining_Entity (N : Node_Id) return Entity_Id;
+--  Return the entity which represents declaration N, so that different
+--  views of the same entity have the same unique defining entity:
+--    * private view and full view of a deferred constant
+--        --> full view
+--    * entry spec and entry body
+--        --> entry spec
+--    * formal parameter on spec and body
+--        --> formal parameter on spec
+--    * package spec, body, and body stub
+--        --> package spec
+--    * protected type, protected body, and protected body stub
+--        --> protected type (full view if private)
+--    * subprogram spec, body, and body stub
+--        --> subprogram spec
+--    * task type, task body, and task body stub
+--        --> task type (full view if private)
+--    * private or incomplete view and full view of a type
+--        --> full view
+--  In other cases, return the defining entity for N.
+function Unique_Entity (E : Entity_Id) return Entity_Id;
+--  Return the unique entity for entity E, which would be returned by
+--  Unique_Defining_Entity if applied to the enclosing declaration of E.
+function Unique_Name (E : Entity_Id) return String;
+--  Return a unique name for entity E, which could be used to identify E
+--  across compilation units.
+function Unit_Is_Visible (U : Entity_Id) return Boolean;
+--  Determine whether a compilation unit is visible in the current context,
+--  because there is a with_clause that makes the unit available. Used to
+--  provide better messages on common visiblity errors on operators.
+function Universal_Interpretation (Opnd : Node_Id) return Entity_Id;
+--  Yields Universal_Integer or Universal_Real if this is a candidate
+function Unqualify (Expr : Node_Id) return Node_Id;
+pragma Inline (Unqualify);
+--  Removes any qualifications from Expr. For example, for T1'(T2'(X)), this
+--  returns X. If Expr is not a qualified expression, returns Expr.
+function Unqual_Conv (Expr : Node_Id) return Node_Id;
+pragma Inline (Unqual_Conv);
+--  Similar to Unqualify, but removes qualified expressions, type
+--  conversions, and unchecked conversions.
+function Visible_Ancestors (Typ : Entity_Id) return Elist_Id;
+--  [Ada 2012:AI-0125-1]: Collect all the visible parents and progenitors
+--  of a type extension or private extension declaration. If the full-view
+--  of private parents and progenitors is available then it is used to
+--  generate the list of visible ancestors; otherwise their partial
+--  view is added to the resulting list.
+function Within_Init_Proc return Boolean;
+--  Determines if Current_Scope is within an init proc
+function Within_Protected_Type (E : Entity_Id) return Boolean;
+--  Returns True if entity E is declared within a protected type
+function Within_Scope (E : Entity_Id; S : Entity_Id) return Boolean;
+--  Returns True if entity E is declared within scope S
+procedure Wrong_Type (Expr : Node_Id; Expected_Type : Entity_Id);
+--  Output error message for incorrectly typed expression. Expr is the node
+--  for the incorrectly typed construct (Etype (Expr) is the type found),
+--  and Expected_Type is the entity for the expected type. Note that Expr
+--  does not have to be a subexpression, anything with an Etype field may
+--  be used.
+function Yields_Synchronized_Object (Typ : Entity_Id) return Boolean;
+--  Determine whether type Typ "yields synchronized object" as specified by
+--  SPARK RM 9.1. To qualify as such, a type must be
+--    * An array type whose element type yields a synchronized object
+--    * A descendant of type Ada.Synchronous_Task_Control.Suspension_Object
+--    * A protected type
+--    * A record type or type extension without defaulted discriminants
+--      whose components are of a type that yields a synchronized object.
+--    * A synchronized interface type
+--    * A task type
+function Yields_Universal_Type (N : Node_Id) return Boolean;
+--  Determine whether unanalyzed node N yields a universal type
+end Sem_Util;

Mercurial > hg > CbC > CbC_gcc

comparison gcc/ada/sem_util.ads @ 111:04ced10e8804