@c o
@c G N A T _ RM o
@c o
-@c Copyright (C) 1995-2004 Free Software Foundation o
+@c Copyright (C) 1995-2005 Free Software Foundation o
@c o
@c o
@c GNAT is maintained by Ada Core Technologies Inc (http://www.gnat.com). o
the representation item is a name that statically denotes a constant
declared before the entity.
@end cartouche
-Followed. GNAT does not support non-static expressions in representation
-clauses unless they are constants declared before the entity. For
-example:
+Followed. In fact, GNAT goes beyond the recommended level of support
+by allowing nonstatic expressions in some representation clauses even
+without the need to declare constants initialized with the values of
+such expressions.
+For example:
@smallexample @c ada
-X : Some_Type;
-for X'Address use To_address (16#2000#);
+ X : Integer;
+ Y : Float;
+ for Y'Address use X'Address;>>
@end smallexample
-@noindent
-will be rejected, since the To_Address expression is non-static. Instead
-write:
-
-@smallexample @c ada
-X_Address : constant Address : = To_Address (16#2000#);
-X : Some_Type;
-for X'Address use X_Address;
-@end smallexample
@sp 1
@cartouche
-- --
-- S p e c --
-- --
--- Copyright (C) 1992-2004, Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2005, 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- --
-- to check if '=' has to be expanded into a bunch component comparaisons.
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
-- synthesized attribute.
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
-- Return True if E is a remote access-to-class-wide-limited_private 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
-- 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
+ -- Note that the result produced is always an expression, not a parameter
-- assciation node, even if named notation was used.
procedure Normalize_Actuals
-- 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.
+ -- 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
-- Return the accessibility level of Typ
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, 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.
+ -- 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.
+ -- Yields universal_Integer or Universal_Real if this is a candidate
function Within_Init_Proc return Boolean;
-- Determines if Current_Scope is within an init proc
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