-- --
-- S p e c --
-- --
--- --
--- Copyright (C) 1992-2002, Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2009, 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 2, or (at your option) any later ver- --
+-- 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 COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
+-- 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 Namet; use Namet;
+with Nmake; use Nmake;
+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;
+ -- Given a type that implements interfaces look for its associated
+ -- definition node and return its list of interfaces.
+
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_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 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.
Ent : Entity_Id := Empty;
Typ : Entity_Id := Empty;
Loc : Source_Ptr := No_Location;
- Rep : Boolean := True);
+ 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,
-- 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.
+ -- 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 parametrize
+ -- whether an error or warning is given.
function Build_Actual_Subtype
- (T : Entity_Id;
- N : Node_Or_Entity_Id)
- return Node_Id;
+ (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;
+ (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.
+ 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;
+ (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.
-- 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, qualified expressions.
+ procedure Check_Nested_Access (Ent : Entity_Id);
+ -- Check whether Ent denotes an entity declared in an uplevel scope, which
+ -- is accessed inside a nested procedure, and set Has_Up_Level_Access flag
+ -- accordingly. This is currently only enabled for VM_Target /= No_VM.
+
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
- -- and raise Program_Error.
+ -- operation. If it appears within a protected action, emit warning.
+
+ 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.
procedure Check_VMS (Construct : Node_Id);
-- Check that this the target is OpenVMS, and if so, return with
-- with OpenVMS ports. The argument is the construct in question
-- and is used to post the error message.
+ 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.
+
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
(N : Node_Id;
Msg : String;
Ent : Entity_Id := Empty;
- Loc : Source_Ptr := No_Location)
- return Node_Id;
- -- Subsidiary to Apply_Compile_Time_Constraint_Error and Checks routines.
- -- Does not modify any nodes, but generates a warning (or error) message.
- -- For convenience, the function always returns its first argument.
+ 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 if the Warn parameter is set to
+ -- True.
procedure Conditional_Delay (New_Ent, Old_Ent : Entity_Id);
-- Sets the Has_Delayed_Freeze flag of New if the Delayed_Freeze flag
-- of Old is set and Old has no yet been Frozen (i.e. Is_Frozen is false);
+ 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.
+
function Current_Entity (N : Node_Id) return Entity_Id;
-- 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.
-- then the defining entity is obtained from the defining unit name
-- ignoring any child unit prefixes.
- function Denotes_Discriminant (N : Node_Id) return Boolean;
- -- Returns True if node N is an N_Identifier node for a discriminant.
- -- Returns False for any other kind of node, or for an N_Identifier
- -- node that does not denote a discriminant.
+ 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 necessary to disable some optimizations on private
+ -- components of protected types, and constraint checks on entry
+ -- families constrained by discriminants.
+
+ 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
function Designate_Same_Unit
(Name1 : Node_Id;
- Name2 : Node_Id)
- return Boolean;
+ Name2 : Node_Id) return Boolean;
-- Return 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
function Enclosing_Generic_Body
- (E : Entity_Id)
- return Node_Id;
+ (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 return Entity_Id;
-- Returns the entity of enclosing N_Compilation_Unit Node which is the
-- root of the current scope (which must not be Standard_Standard, and
-- build and initialize a new freeze node and set Has_Delayed_Freeze
-- true for entity E.
- procedure Enter_Name (Def_Id : Node_Id);
+ 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.
+ 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.
+
+ 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 procedure call. If
+ -- so, then Formal points to the entity for the formal (whose Ekind is one
+ -- of E_In_Parameter, E_Out_Parameter, E_In_Out_Parameter) and Call is set
+ -- to the node for the corresponding call. If the node N is not an actual
+ -- parameter, or is an actual parameter of a function call, then Formal and
+ -- Call are set to Empty.
+
function Find_Corresponding_Discriminant
(Id : Node_Id;
- Typ : Entity_Id)
- return Entity_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 analyzed. Subsequent uses of this id on a different
-- type denote the discriminant at the same position in this new type.
+ 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, Ent is set to the entity and, if there is an offset, Off is set
+ -- 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 Ent is set to Empty, and Off is set to False.
+
+ function Find_Parameter_Type (Param : Node_Id) return Entity_Id;
+ -- Return the type of formal parameter Param as determined by its
+ -- specification.
+
+ 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 or N_Procedure_Call_Statement node. The
-- result returned is the first actual parameter in declaration order
function Full_Qualified_Name (E : Entity_Id) return String_Id;
-- Generates the string literal corresponding to the E's full qualified
- -- name in upper case. An ASCII.NUL is appended as the last character
+ -- name in upper case. An ASCII.NUL is appended as the last character.
+ -- The names in the string are generated by Namet.Get_Decoded_Name_String.
procedure Gather_Components
(Typ : Entity_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.
+ -- 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.
+ -- 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.
+ -- 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.
--
- -- 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
-- may be set to Error if there was an earlier error in the range.
function Get_Enum_Lit_From_Pos
- (T : Entity_Id;
- Pos : Uint;
- Loc : Source_Ptr)
- return Entity_Id;
+ (T : Entity_Id;
+ Pos : Uint;
+ Loc : Source_Ptr) return Entity_Id;
-- This function obtains the E_Enumeration_Literal entity for the
- -- specified value from the enumneration type or subtype T. The
+ -- specified value from the enumeration type or subtype T. The
-- second argument is the Pos value, which is assumed to be in range.
-- The third argument supplies a source location for constructed
-- nodes returned by this function.
+ 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_Name_Entity_Id (Id : Name_Id) return 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_Pragma_Id (N : Node_Id) return Pragma_Id;
+ pragma Inline (Get_Pragma_Id);
+ -- Obtains the Pragma_Id from the Chars field of Pragma_Identifier (N)
+
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.
+ -- 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_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_Subprogram_Body (E : Entity_Id) return Node_Id;
-- Given the entity for a subprogram (E_Function or E_Procedure),
-- Task_Body_Procedure field from the corresponding task type
-- declaration.
+ 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) 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. This is used to determine if alignment
+ -- checks are required for address clauses, and also whether copies must
+ -- be made when objects are passed by reference.
+ --
+ -- 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_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_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_Null_Exclusion (N : Node_Id) return Boolean;
+ -- Determine whether node N has a null exclusion
+
+ function Has_Overriding_Initialize (T : Entity_Id) return Boolean;
+ -- Predicate to determine whether a controlled type has a user-defined
+ -- Initialize primitive, which makes the type not preelaborable.
+
+ 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_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_Tagged_Component (Typ : Entity_Id) return Boolean;
- -- Typ must be a composite type (array or record). This function is used
- -- to check if '=' has to be expanded into a bunch component comparaisons.
+ -- Returns True if Typ is a composite type (array or record) which is
+ -- either itself a tagged type, or has a component (recursively) which is
+ -- a tagged type. Returns False for non-composite type, or if no tagged
+ -- component is present. This function is used to check if '=' has to be
+ -- expanded into a bunch component comparisons.
+
+ function Implements_Interface
+ (Typ_Ent : Entity_Id;
+ Iface_Ent : Entity_Id;
+ Exclude_Parents : Boolean := False) return Boolean;
+ -- Returns true if the Typ implements interface Iface
function In_Instance return Boolean;
- -- Returns True if the current scope is within a generic instance.
+ -- 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
-- Returns True if current scope 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_Parameter_Specification (N : Node_Id) return Boolean;
+ -- Returns True if node N belongs to a parameter specification
+
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
-- package specification. The package must be on the scope stack, and the
-- corresponding private part must not.
+ 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.
+
function Is_AAMP_Float (E : Entity_Id) return Boolean;
-- Defined for all type entities. Returns True only for the base type
-- of float types with AAMP format. The particular format is determined
-- the dependency of Einfo on Targparm which would be required for a
-- synthesized attribute.
- 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_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.
+ -- Determines if N is an actual parameter 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.
+ 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_Coextension_Root (N : Node_Id) return Boolean;
+ -- Determine whether node N is an allocator which acts as a coextension
+ -- root.
+
+ 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_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_Descendent_Of (T1 : Entity_Id; T2 : Entity_Id) return Boolean;
+ -- Returns True if type T1 is a descendent of type T2, and false otherwise.
+ -- This is the RM definition, a type is a descendent of another type if it
+ -- is the same type or is derived from a descendent of the other type.
+
+ 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_False (U : Uint) return Boolean;
-- 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
-- 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 the use of
- -- pragma Normalized_Scalars does not count.
+ -- 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 Normalized_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_Inherited_Operation (E : Entity_Id) return Boolean;
-- E is a subprogram. Return True is E is an implicit operation inherited
-- by a derived type declarations.
+ function Is_LHS (N : Node_Id) return Boolean;
+ -- Returns True iff N is used as Name in an assignment statement.
+
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_Local_Variable_Reference (Expr : Node_Id) return Boolean;
- -- Determines whether Expr is a refeference to a variable or IN OUT
+ -- 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_Object_Reference (N : Node_Id) return Boolean;
-- Determines if the tree referenced by N represents an object. Both
-- 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 field has an initialization expression). Note that initialization
- -- resulting from the use of pragma Normalized_Scalars does not count.
+ -- one component has an initialization expression). Note that
+ -- initialization resulting from the use of pragma Normalized_Scalars does
+ -- not count.
+
+ 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, a non-tagged
+ -- 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_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-limited_private type
+ -- 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.
+ -- 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_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
function Is_Statement (N : Node_Id) return Boolean;
-- 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)
+ -- the N_Statement_Other_Than_Procedure_Call subtype from Sinfo).
+ -- Note that a label is *not* a statement, and will return False.
+
+ 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
-- Boolean operand (i.e. is either 0 for False, or 1 for True). This
-- function simply tests if it is True (i.e. non-zero)
+ function Is_Value_Type (T : Entity_Id) return Boolean;
+ -- Returns true if type T represents a value type. This is only relevant to
+ -- CIL, will always return false for other targets.
+ -- What is a "value type", since this is not an Ada term, it should be
+ -- defined here ???
+
function Is_Variable (N : Node_Id) 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,
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).
+ -- 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).
+
+ 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 Constant_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.
+ -- 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_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 Make_Simple_Return_Statement
+ (Sloc : Source_Ptr;
+ Expression : Node_Id := Empty) return Node_Id
+ renames Make_Return_Statement;
+ -- See Sinfo. We rename Make_Return_Statement to the correct Ada 2005
+ -- terminology here. Clients should use Make_Simple_Return_Statement.
+
+ Make_Return_Statement : constant := -2 ** 33;
+ -- Attempt to prevent accidental uses of Make_Return_Statement. If this
+ -- and the one in Nmake are both potentially use-visible, it will cause
+ -- a compilation error. Note that type and value are irrelevant.
+
+ N_Return_Statement : constant := -2**33;
+ -- Attempt to prevent accidental uses of N_Return_Statement; similar to
+ -- Make_Return_Statement above.
+
+ 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 erroneous marking is
+ -- cleaned up during resolution.
+
+ 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 Needs_One_Actual (E : Entity_Id) return Boolean;
+ -- Returns True if a function has defaults for all but its first
+ -- formal. Used in Ada 2005 mode to solve the syntactic ambiguity that
+ -- results from an indexing of a function call written in prefix form.
+
+ 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;
+ -- Given a node that is the root of a subtree, Copy_Tree copies the entire
+ -- syntactic subtree, including recursively any descendents whose parent
+ -- field references a copied node (descendents not linked to a copied node
+ -- by the parent field are not copied, instead the copied tree references
+ -- the same descendent as the original in this case, which is appropriate
+ -- for non-syntactic fields such as Etype). The parent pointers in the
+ -- copy are properly set. Copy_Tree (Empty/Error) returns Empty/Error.
+ -- The one exception to the rule of not copying semantic fields is that
+ -- any implicit types attached to the subtree are duplicated, so that
+ -- the copy contains a distinct set of implicit type entities. Thus this
+ -- function is used when it is necessary to duplicate an analyzed tree,
+ -- declared in the same or some other compilation unit. This function is
+ -- declared here rather than in atree because it uses semantic information
+ -- in particular concerning the structure of itypes and the generation of
+ -- public symbols.
+
+ -- The Map argument, if set to a non-empty Elist, specifies a set of
+ -- mappings to be applied to entities in the tree. The map has the form:
+ --
+ -- old entity 1
+ -- new entity to replace references to entity 1
+ -- old entity 2
+ -- new entity to replace references to entity 2
+ -- ...
+ --
+ -- The call destroys the contents of Map in this case
+ --
+ -- The parameter New_Sloc, if set to a value other than No_Location, is
+ -- used as the Sloc value for all nodes in the new copy. If New_Sloc is
+ -- set to its default value No_Location, then the Sloc values of the
+ -- nodes in the copy are simply copied from the corresponding original.
+ --
+ -- The Comes_From_Source indication is unchanged if New_Sloc is set to
+ -- the default No_Location value, but is reset if New_Sloc is given, since
+ -- in this case the result clearly is neither a source node or an exact
+ -- copy of a source node.
+ --
+ -- The parameter New_Scope, if set to a value other than Empty, is the
+ -- value to use as the Scope for any Itypes that are copied. The most
+ -- typical value for this parameter, if given, is Current_Scope.
function New_External_Entity
(Kind : Entity_Kind;
Related_Id : Entity_Id;
Suffix : Character;
Suffix_Index : Nat := 0;
- Prefix : Character := ' ')
- return Entity_Id;
+ 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
(Kind : Entity_Kind;
Scope_Id : Entity_Id;
Sloc_Value : Source_Ptr;
- Id_Char : Character)
- return Entity_Id;
+ 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
-- 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 tha the result produced is always an expression, not a parameter
- -- assciation node, even if named notation was used.
+ -- Note that the result produced is always an expression, not a parameter
+ -- association node, even if named notation was used.
procedure Normalize_Actuals
(N : Node_Id;
-- 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);
+ 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 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 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
procedure Process_End_Label
(N : Node_Id;
Typ : Character;
- Ent : Entity_Id);
+ 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
-- S is a possibly signed syntactically valid real literal. The result
-- returned is an N_Real_Literal node representing the literal value.
+ 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_Homonym (E : Entity_Id);
+ -- Removes E from the homonym chain
+
+ 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;
-- E is a type entity. The result is True when temporaries of this
-- type need to be wrapped in a transient scope to be reclaimed
procedure Reset_Analyzed_Flags (N : Node_Id);
-- Reset the Analyzed flags in all nodes of the tree whose root is N
+ 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
+ -- 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
-- 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 Scope_Within_Or_Same (Scope1, Scope2 : Entity_Id) return Boolean;
-- Determines if the entity Scope1 is the same as Scope2, or if it is
-- inside it, where both entities represent scopes. Note that scopes
-- Like Scope_Within_Or_Same, except that this function returns
-- False in the case where Scope1 and Scope2 are the same scope.
+ 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.
+
procedure Set_Current_Entity (E : Entity_Id);
-- 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_Style_Check (N : Node_Id; Val : Entity_Id);
-- This procedure has the same calling sequence as Set_Entity, but
-- if Style_Check is set, then it calls a style checking routine which
-- 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_Scope_Is_Transient (V : Boolean := True);
-- Set the flag Is_Transient of the current scope
procedure Set_Size_Info (T1, T2 : Entity_Id);
- -- 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.
+ -- 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.
- function Scope_Is_Transient return Boolean;
- -- True if the current scope is transient.
+ function Scope_Is_Transient return Boolean;
+ -- True if the current scope is transient
function Static_Integer (N : Node_Id) return Uint;
-- This function analyzes the given expression node and then resolves it
-- E1 and E2 refer to different objects
function Subprogram_Access_Level (Subp : Entity_Id) return Uint;
- -- Return the accessibility level of the view denoted by Subp.
+ -- Return the accessibility level of the view denoted by Subp
procedure Trace_Scope (N : Node_Id; E : Entity_Id; Msg : String);
- -- Print debugging information on entry to each unit being analyzed.
+ -- 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.
+ -- Return the accessibility level of Typ
+
+ function Ultimate_Alias (Prim : Entity_Id) return Entity_Id;
+ -- Return the last entity in the chain of aliased entities of Prim.
+ -- If Prim has no alias return Prim.
function Unit_Declaration_Node (Unit_Id : Entity_Id) return Node_Id;
- -- Unit_Id is the simple name of a program unit, this function returns
- -- the corresponding xxx_Declaration node for the entity. Also applies
- -- to the body entities for subprograms in tasks, in which case it
- -- returns the subprogram or task body node for it. The unit may be
- -- a child unit with any number of ancestors.
+ -- Unit_Id is the simple name of a program unit, this function returns the
+ -- corresponding xxx_Declaration node for the entity. Also applies to the
+ -- body entities for subprograms, tasks and protected units, in which case
+ -- it returns the subprogram, task or protected body node for it. The unit
+ -- may be a child unit with any number of ancestors.
+
+ 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;
+ -- Removes any qualifications from Expr. For example, for T1'(T2'(X)),
+ -- this returns X. If Expr is not a qualified expression, returns Expr.
function Within_Init_Proc return Boolean;
- -- Determines if Current_Scope is within an Init_Proc
+ -- Determines if Current_Scope is within an init proc
procedure Wrong_Type (Expr : Node_Id; Expected_Type : Entity_Id);
-- Output error message for incorrectly typed expression. Expr is the
pragma Inline (Set_Current_Entity);
pragma Inline (Set_Name_Entity_Id);
pragma Inline (Set_Size_Info);
+ pragma Inline (Unqualify);
end Sem_Util;
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