961 lines
32 KiB
Ada
961 lines
32 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- E X P _ I M G V --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 2001-2006, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 2, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNAT; see file COPYING. If not, write --
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-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
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-- Boston, MA 02110-1301, USA. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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with Atree; use Atree;
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with Casing; use Casing;
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with Checks; use Checks;
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with Einfo; use Einfo;
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with Exp_Util; use Exp_Util;
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with Namet; use Namet;
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with Nmake; use Nmake;
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with Nlists; use Nlists;
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with Opt; use Opt;
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with Rtsfind; use Rtsfind;
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with Sem_Res; use Sem_Res;
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with Sinfo; use Sinfo;
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with Snames; use Snames;
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with Stand; use Stand;
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with Stringt; use Stringt;
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with Tbuild; use Tbuild;
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with Ttypes; use Ttypes;
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with Uintp; use Uintp;
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package body Exp_Imgv is
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------------------------------------
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-- Build_Enumeration_Image_Tables --
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------------------------------------
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procedure Build_Enumeration_Image_Tables (E : Entity_Id; N : Node_Id) is
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Loc : constant Source_Ptr := Sloc (E);
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Str : String_Id;
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Ind : List_Id;
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Lit : Entity_Id;
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Nlit : Nat;
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Len : Nat;
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Estr : Entity_Id;
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Eind : Entity_Id;
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Ityp : Node_Id;
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begin
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-- Nothing to do for other than a root enumeration type
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if E /= Root_Type (E) then
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return;
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-- Nothing to do if pragma Discard_Names applies
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elsif Discard_Names (E) then
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return;
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end if;
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-- Otherwise tables need constructing
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Start_String;
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Ind := New_List;
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Lit := First_Literal (E);
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Len := 1;
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Nlit := 0;
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loop
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Append_To (Ind,
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Make_Integer_Literal (Loc, UI_From_Int (Len)));
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exit when No (Lit);
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Nlit := Nlit + 1;
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Get_Unqualified_Decoded_Name_String (Chars (Lit));
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if Name_Buffer (1) /= ''' then
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Set_Casing (All_Upper_Case);
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end if;
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Store_String_Chars (Name_Buffer (1 .. Name_Len));
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Len := Len + Int (Name_Len);
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Next_Literal (Lit);
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end loop;
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if Len < Int (2 ** (8 - 1)) then
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Ityp := Standard_Integer_8;
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elsif Len < Int (2 ** (16 - 1)) then
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Ityp := Standard_Integer_16;
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else
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Ityp := Standard_Integer_32;
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end if;
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Str := End_String;
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Estr :=
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Make_Defining_Identifier (Loc,
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Chars => New_External_Name (Chars (E), 'S'));
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Eind :=
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Make_Defining_Identifier (Loc,
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Chars => New_External_Name (Chars (E), 'N'));
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Set_Lit_Strings (E, Estr);
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Set_Lit_Indexes (E, Eind);
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Insert_Actions (N,
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New_List (
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Make_Object_Declaration (Loc,
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Defining_Identifier => Estr,
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Constant_Present => True,
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Object_Definition =>
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New_Occurrence_Of (Standard_String, Loc),
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Expression =>
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Make_String_Literal (Loc,
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Strval => Str)),
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Make_Object_Declaration (Loc,
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Defining_Identifier => Eind,
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Constant_Present => True,
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Object_Definition =>
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Make_Constrained_Array_Definition (Loc,
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Discrete_Subtype_Definitions => New_List (
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Make_Range (Loc,
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Low_Bound => Make_Integer_Literal (Loc, 0),
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High_Bound => Make_Integer_Literal (Loc, Nlit))),
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Component_Definition =>
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Make_Component_Definition (Loc,
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Aliased_Present => False,
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Subtype_Indication => New_Occurrence_Of (Ityp, Loc))),
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Expression =>
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Make_Aggregate (Loc,
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Expressions => Ind))),
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Suppress => All_Checks);
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end Build_Enumeration_Image_Tables;
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----------------------------
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-- Expand_Image_Attribute --
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----------------------------
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-- For all non-enumeration types, and for enumeration types declared
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-- in packages Standard or System, typ'Image (Val) expands into:
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-- Image_xx (tp (Expr) [, pm])
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-- The name xx and type conversion tp (Expr) (called tv below) depend on
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-- the root type of Expr. The argument pm is an extra type dependent
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-- parameter only used in some cases as follows:
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-- For types whose root type is Character
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-- xx = Character
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-- tv = Character (Expr)
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-- For types whose root type is Boolean
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-- xx = Boolean
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-- tv = Boolean (Expr)
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-- For signed integer types with size <= Integer'Size
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-- xx = Integer
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-- tv = Integer (Expr)
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-- For other signed integer types
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-- xx = Long_Long_Integer
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-- tv = Long_Long_Integer (Expr)
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-- For modular types with modulus <= System.Unsigned_Types.Unsigned
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-- xx = Unsigned
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-- tv = System.Unsigned_Types.Unsigned (Expr)
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-- For other modular integer types
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-- xx = Long_Long_Unsigned
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-- tv = System.Unsigned_Types.Long_Long_Unsigned (Expr)
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-- For types whose root type is Wide_Character
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-- xx = Wide_Character
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-- tv = Wide_Character (Expr)
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-- pm = Boolean, true if Ada 2005 mode, False otherwise
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-- For types whose root type is Wide_Wide_Character
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-- xx = Wide_Wide_haracter
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-- tv = Wide_Wide_Character (Expr)
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-- For floating-point types
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-- xx = Floating_Point
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-- tv = Long_Long_Float (Expr)
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-- pm = typ'Digits
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-- For ordinary fixed-point types
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-- xx = Ordinary_Fixed_Point
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-- tv = Long_Long_Float (Expr)
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-- pm = typ'Aft
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-- For decimal fixed-point types with size = Integer'Size
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-- xx = Decimal
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-- tv = Integer (Expr)
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-- pm = typ'Scale
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-- For decimal fixed-point types with size > Integer'Size
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-- xx = Long_Long_Decimal
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-- tv = Long_Long_Integer (Expr)
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-- pm = typ'Scale
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-- Note: for the decimal fixed-point type cases, the conversion is
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-- done literally without scaling (i.e. the actual expression that
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-- is generated is Image_xx (tp?(Expr) [, pm])
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-- For enumeration types other than those declared packages Standard
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-- or System, typ'Image (X) expands into:
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-- Image_Enumeration_NN (typ'Pos (X), typS, typI'Address)
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-- where typS and typI are the entities constructed as described in
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-- the spec for the procedure Build_Enumeration_Image_Tables and NN
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-- is 32/16/8 depending on the element type of Lit_Indexes.
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procedure Expand_Image_Attribute (N : Node_Id) is
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Loc : constant Source_Ptr := Sloc (N);
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Exprs : constant List_Id := Expressions (N);
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Pref : constant Node_Id := Prefix (N);
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Ptyp : constant Entity_Id := Entity (Pref);
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Rtyp : constant Entity_Id := Root_Type (Ptyp);
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Expr : constant Node_Id := Relocate_Node (First (Exprs));
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Imid : RE_Id;
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Tent : Entity_Id;
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Arglist : List_Id;
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Func : RE_Id;
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Ttyp : Entity_Id;
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Func_Ent : Entity_Id;
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begin
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if Rtyp = Standard_Boolean then
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Imid := RE_Image_Boolean;
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Tent := Rtyp;
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elsif Rtyp = Standard_Character then
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Imid := RE_Image_Character;
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Tent := Rtyp;
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elsif Rtyp = Standard_Wide_Character then
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Imid := RE_Image_Wide_Character;
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Tent := Rtyp;
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elsif Rtyp = Standard_Wide_Wide_Character then
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Imid := RE_Image_Wide_Wide_Character;
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Tent := Rtyp;
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elsif Is_Signed_Integer_Type (Rtyp) then
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if Esize (Rtyp) <= Esize (Standard_Integer) then
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Imid := RE_Image_Integer;
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Tent := Standard_Integer;
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else
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Imid := RE_Image_Long_Long_Integer;
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Tent := Standard_Long_Long_Integer;
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end if;
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elsif Is_Modular_Integer_Type (Rtyp) then
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if Modulus (Rtyp) <= Modulus (RTE (RE_Unsigned)) then
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Imid := RE_Image_Unsigned;
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Tent := RTE (RE_Unsigned);
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else
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Imid := RE_Image_Long_Long_Unsigned;
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Tent := RTE (RE_Long_Long_Unsigned);
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end if;
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elsif Is_Decimal_Fixed_Point_Type (Rtyp) then
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if UI_To_Int (Esize (Rtyp)) <= Standard_Integer_Size then
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Imid := RE_Image_Decimal;
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Tent := Standard_Integer;
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else
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Imid := RE_Image_Long_Long_Decimal;
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Tent := Standard_Long_Long_Integer;
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end if;
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elsif Is_Ordinary_Fixed_Point_Type (Rtyp) then
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Imid := RE_Image_Ordinary_Fixed_Point;
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Tent := Standard_Long_Long_Float;
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elsif Is_Floating_Point_Type (Rtyp) then
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Imid := RE_Image_Floating_Point;
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Tent := Standard_Long_Long_Float;
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-- Only other possibility is user defined enumeration type
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else
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if Discard_Names (First_Subtype (Ptyp))
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or else No (Lit_Strings (Root_Type (Ptyp)))
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then
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-- When pragma Discard_Names applies to the first subtype,
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-- then build (Pref'Pos)'Img.
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Rewrite (N,
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Make_Attribute_Reference (Loc,
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Prefix =>
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Make_Attribute_Reference (Loc,
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Prefix => Pref,
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Attribute_Name => Name_Pos,
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Expressions => New_List (Expr)),
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Attribute_Name =>
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Name_Img));
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Analyze_And_Resolve (N, Standard_String);
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else
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-- Here we get the Image of an enumeration type
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Ttyp := Component_Type (Etype (Lit_Indexes (Rtyp)));
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if Ttyp = Standard_Integer_8 then
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Func := RE_Image_Enumeration_8;
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elsif Ttyp = Standard_Integer_16 then
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Func := RE_Image_Enumeration_16;
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else
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Func := RE_Image_Enumeration_32;
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end if;
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-- Apply a validity check, since it is a bit drastic to
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-- get a completely junk image value for an invalid value.
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if not Expr_Known_Valid (Expr) then
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Insert_Valid_Check (Expr);
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end if;
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Rewrite (N,
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Make_Function_Call (Loc,
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Name => New_Occurrence_Of (RTE (Func), Loc),
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Parameter_Associations => New_List (
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Make_Attribute_Reference (Loc,
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Attribute_Name => Name_Pos,
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Prefix => New_Occurrence_Of (Ptyp, Loc),
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Expressions => New_List (Expr)),
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New_Occurrence_Of (Lit_Strings (Rtyp), Loc),
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Make_Attribute_Reference (Loc,
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Prefix => New_Occurrence_Of (Lit_Indexes (Rtyp), Loc),
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Attribute_Name => Name_Address))));
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Analyze_And_Resolve (N, Standard_String);
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end if;
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return;
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end if;
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-- If we fall through, we have one of the cases that is handled by
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-- calling one of the System.Img_xx routines and Imid is set to the
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-- RE_Id for the function to be called.
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Func_Ent := RTE (Imid);
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-- If the function entity is empty, that means we have a case in
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-- no run time mode where the operation is not allowed, and an
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-- appropriate diagnostic has already been issued.
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if No (Func_Ent) then
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return;
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end if;
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-- Otherwise prepare arguments for run-time call
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Arglist := New_List (Convert_To (Tent, Relocate_Node (Expr)));
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-- For floating-point types, append Digits argument
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if Is_Floating_Point_Type (Rtyp) then
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Append_To (Arglist,
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Make_Attribute_Reference (Loc,
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Prefix => New_Reference_To (Ptyp, Loc),
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Attribute_Name => Name_Digits));
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-- For ordinary fixed-point types, append Aft parameter
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elsif Is_Ordinary_Fixed_Point_Type (Rtyp) then
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Append_To (Arglist,
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Make_Attribute_Reference (Loc,
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Prefix => New_Reference_To (Ptyp, Loc),
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Attribute_Name => Name_Aft));
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-- For decimal, append Scale and also set to do literal conversion
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elsif Is_Decimal_Fixed_Point_Type (Rtyp) then
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Append_To (Arglist,
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Make_Attribute_Reference (Loc,
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Prefix => New_Reference_To (Ptyp, Loc),
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Attribute_Name => Name_Scale));
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Set_Conversion_OK (First (Arglist));
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Set_Etype (First (Arglist), Tent);
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-- For Wide_Character, append Ada 2005 indication
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elsif Rtyp = Standard_Wide_Character then
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Append_To (Arglist,
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New_Reference_To (Boolean_Literals (Ada_Version >= Ada_05), Loc));
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end if;
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Rewrite (N,
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Make_Function_Call (Loc,
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Name => New_Reference_To (Func_Ent, Loc),
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Parameter_Associations => Arglist));
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Analyze_And_Resolve (N, Standard_String);
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end Expand_Image_Attribute;
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----------------------------
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-- Expand_Value_Attribute --
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----------------------------
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-- For scalar types derived from Boolean, Character and integer types
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-- in package Standard, typ'Value (X) expands into:
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-- btyp (Value_xx (X))
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-- where btyp is he base type of the prefix
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-- For types whose root type is Character
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-- xx = Character
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-- For types whose root type is Wide_Character
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-- xx = Wide_Character
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-- For types whose root type is Wide_Wide_Character
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-- xx = Wide_Wide_Character
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-- For types whose root type is Boolean
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-- xx = Boolean
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-- For signed integer types with size <= Integer'Size
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-- xx = Integer
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-- For other signed integer types
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-- xx = Long_Long_Integer
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-- For modular types with modulus <= System.Unsigned_Types.Unsigned
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-- xx = Unsigned
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-- For other modular integer types
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-- xx = Long_Long_Unsigned
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-- For floating-point types and ordinary fixed-point types
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-- xx = Real
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-- For Wide_[Wide_]Character types, typ'Value (X) expands into:
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-- btyp (Value_xx (X, EM))
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-- where btyp is the base type of the prefix, and EM is the encoding method
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-- For decimal types with size <= Integer'Size, typ'Value (X)
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-- expands into
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-- btyp?(Value_Decimal (X, typ'Scale));
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-- For all other decimal types, typ'Value (X) expands into
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-- btyp?(Value_Long_Long_Decimal (X, typ'Scale))
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-- For enumeration types other than those derived from types Boolean,
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-- Character, Wide_[Wide_]Character in Standard, typ'Value (X) expands to:
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-- Enum'Val (Value_Enumeration_NN (typS, typI'Address, Num, X))
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-- where typS and typI and the Lit_Strings and Lit_Indexes entities
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-- from T's root type entitym and Num is Enum'Pos (Enum'Last). The
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-- Value_Enumeration_NN function will search the tables looking for
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-- X and return the position number in the table if found which is
|
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-- used to provide the result of 'Value (using Enum'Val). If the
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-- value is not found Constraint_Error is raised. The suffix _NN
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-- depends on the element type of typI.
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procedure Expand_Value_Attribute (N : Node_Id) is
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Loc : constant Source_Ptr := Sloc (N);
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Typ : constant Entity_Id := Etype (N);
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Btyp : constant Entity_Id := Base_Type (Typ);
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Rtyp : constant Entity_Id := Root_Type (Typ);
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Exprs : constant List_Id := Expressions (N);
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Vid : RE_Id;
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Args : List_Id;
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Func : RE_Id;
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Ttyp : Entity_Id;
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begin
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Args := Exprs;
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if Rtyp = Standard_Character then
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Vid := RE_Value_Character;
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elsif Rtyp = Standard_Boolean then
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Vid := RE_Value_Boolean;
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elsif Rtyp = Standard_Wide_Character then
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Vid := RE_Value_Wide_Character;
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Append_To (Args,
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Make_Integer_Literal (Loc,
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Intval => Int (Wide_Character_Encoding_Method)));
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elsif Rtyp = Standard_Wide_Wide_Character then
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Vid := RE_Value_Wide_Wide_Character;
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Append_To (Args,
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Make_Integer_Literal (Loc,
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Intval => Int (Wide_Character_Encoding_Method)));
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elsif Rtyp = Base_Type (Standard_Short_Short_Integer)
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or else Rtyp = Base_Type (Standard_Short_Integer)
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or else Rtyp = Base_Type (Standard_Integer)
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then
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Vid := RE_Value_Integer;
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elsif Is_Signed_Integer_Type (Rtyp) then
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Vid := RE_Value_Long_Long_Integer;
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elsif Is_Modular_Integer_Type (Rtyp) then
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if Modulus (Rtyp) <= Modulus (RTE (RE_Unsigned)) then
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Vid := RE_Value_Unsigned;
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else
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Vid := RE_Value_Long_Long_Unsigned;
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end if;
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|
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elsif Is_Decimal_Fixed_Point_Type (Rtyp) then
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if UI_To_Int (Esize (Rtyp)) <= Standard_Integer_Size then
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Vid := RE_Value_Decimal;
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else
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Vid := RE_Value_Long_Long_Decimal;
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end if;
|
|
|
|
Append_To (Args,
|
|
Make_Attribute_Reference (Loc,
|
|
Prefix => New_Reference_To (Typ, Loc),
|
|
Attribute_Name => Name_Scale));
|
|
|
|
Rewrite (N,
|
|
OK_Convert_To (Btyp,
|
|
Make_Function_Call (Loc,
|
|
Name => New_Reference_To (RTE (Vid), Loc),
|
|
Parameter_Associations => Args)));
|
|
|
|
Set_Etype (N, Btyp);
|
|
Analyze_And_Resolve (N, Btyp);
|
|
return;
|
|
|
|
elsif Is_Real_Type (Rtyp) then
|
|
Vid := RE_Value_Real;
|
|
|
|
-- Only other possibility is user defined enumeration type
|
|
|
|
else
|
|
pragma Assert (Is_Enumeration_Type (Rtyp));
|
|
|
|
-- Case of pragma Discard_Names, transform the Value
|
|
-- attribute to Btyp'Val (Long_Long_Integer'Value (Args))
|
|
|
|
if Discard_Names (First_Subtype (Typ))
|
|
or else No (Lit_Strings (Rtyp))
|
|
then
|
|
Rewrite (N,
|
|
Make_Attribute_Reference (Loc,
|
|
Prefix => New_Reference_To (Btyp, Loc),
|
|
Attribute_Name => Name_Val,
|
|
Expressions => New_List (
|
|
Make_Attribute_Reference (Loc,
|
|
Prefix =>
|
|
New_Occurrence_Of (Standard_Long_Long_Integer, Loc),
|
|
Attribute_Name => Name_Value,
|
|
Expressions => Args))));
|
|
|
|
Analyze_And_Resolve (N, Btyp);
|
|
|
|
-- Here for normal case where we have enumeration tables, this
|
|
-- is where we build
|
|
|
|
-- T'Val (Value_Enumeration_NN (typS, typI'Address, Num, X))
|
|
|
|
else
|
|
Ttyp := Component_Type (Etype (Lit_Indexes (Rtyp)));
|
|
|
|
if Ttyp = Standard_Integer_8 then
|
|
Func := RE_Value_Enumeration_8;
|
|
elsif Ttyp = Standard_Integer_16 then
|
|
Func := RE_Value_Enumeration_16;
|
|
else
|
|
Func := RE_Value_Enumeration_32;
|
|
end if;
|
|
|
|
Prepend_To (Args,
|
|
Make_Attribute_Reference (Loc,
|
|
Prefix => New_Occurrence_Of (Rtyp, Loc),
|
|
Attribute_Name => Name_Pos,
|
|
Expressions => New_List (
|
|
Make_Attribute_Reference (Loc,
|
|
Prefix => New_Occurrence_Of (Rtyp, Loc),
|
|
Attribute_Name => Name_Last))));
|
|
|
|
Prepend_To (Args,
|
|
Make_Attribute_Reference (Loc,
|
|
Prefix => New_Occurrence_Of (Lit_Indexes (Rtyp), Loc),
|
|
Attribute_Name => Name_Address));
|
|
|
|
Prepend_To (Args,
|
|
New_Occurrence_Of (Lit_Strings (Rtyp), Loc));
|
|
|
|
Rewrite (N,
|
|
Make_Attribute_Reference (Loc,
|
|
Prefix => New_Reference_To (Typ, Loc),
|
|
Attribute_Name => Name_Val,
|
|
Expressions => New_List (
|
|
Make_Function_Call (Loc,
|
|
Name =>
|
|
New_Reference_To (RTE (Func), Loc),
|
|
Parameter_Associations => Args))));
|
|
|
|
Analyze_And_Resolve (N, Btyp);
|
|
end if;
|
|
|
|
return;
|
|
end if;
|
|
|
|
-- Fall through for all cases except user defined enumeration type
|
|
-- and decimal types, with Vid set to the Id of the entity for the
|
|
-- Value routine and Args set to the list of parameters for the call.
|
|
|
|
Rewrite (N,
|
|
Convert_To (Btyp,
|
|
Make_Function_Call (Loc,
|
|
Name => New_Reference_To (RTE (Vid), Loc),
|
|
Parameter_Associations => Args)));
|
|
|
|
Analyze_And_Resolve (N, Btyp);
|
|
end Expand_Value_Attribute;
|
|
|
|
----------------------------
|
|
-- Expand_Width_Attribute --
|
|
----------------------------
|
|
|
|
-- The processing here also handles the case of Wide_[Wide_]Width. With the
|
|
-- exceptions noted, the processing is identical
|
|
|
|
-- For scalar types derived from Boolean, character and integer types
|
|
-- in package Standard. Note that the Width attribute is computed at
|
|
-- compile time for all cases except those involving non-static sub-
|
|
-- types. For such subtypes, typ'[Wide_[Wide_]]Width expands into:
|
|
|
|
-- Result_Type (xx (yy (Ptyp'First), yy (Ptyp'Last)))
|
|
|
|
-- where
|
|
|
|
-- For types whose root type is Character
|
|
-- xx = Width_Character
|
|
-- yy = Character
|
|
|
|
-- For types whose root type is Wide_Character
|
|
-- xx = Wide_Width_Character
|
|
-- yy = Character
|
|
|
|
-- For types whose root type is Wide_Wide_Character
|
|
-- xx = Wide_Wide_Width_Character
|
|
-- yy = Character
|
|
|
|
-- For types whose root type is Boolean
|
|
-- xx = Width_Boolean
|
|
-- yy = Boolean
|
|
|
|
-- For signed integer types
|
|
-- xx = Width_Long_Long_Integer
|
|
-- yy = Long_Long_Integer
|
|
|
|
-- For modular integer types
|
|
-- xx = Width_Long_Long_Unsigned
|
|
-- yy = Long_Long_Unsigned
|
|
|
|
-- For types derived from Wide_Character, typ'Width expands into
|
|
|
|
-- Result_Type (Width_Wide_Character (
|
|
-- Wide_Character (typ'First),
|
|
-- Wide_Character (typ'Last),
|
|
|
|
-- and typ'Wide_Width expands into:
|
|
|
|
-- Result_Type (Wide_Width_Wide_Character (
|
|
-- Wide_Character (typ'First),
|
|
-- Wide_Character (typ'Last));
|
|
|
|
-- and typ'Wide_Wide_Width expands into
|
|
|
|
-- Result_Type (Wide_Wide_Width_Wide_Character (
|
|
-- Wide_Character (typ'First),
|
|
-- Wide_Character (typ'Last));
|
|
|
|
-- For types derived from Wide_Wide_Character, typ'Width expands into
|
|
|
|
-- Result_Type (Width_Wide_Wide_Character (
|
|
-- Wide_Wide_Character (typ'First),
|
|
-- Wide_Wide_Character (typ'Last),
|
|
|
|
-- and typ'Wide_Width expands into:
|
|
|
|
-- Result_Type (Wide_Width_Wide_Wide_Character (
|
|
-- Wide_Wide_Character (typ'First),
|
|
-- Wide_Wide_Character (typ'Last));
|
|
|
|
-- and typ'Wide_Wide_Width expands into
|
|
|
|
-- Result_Type (Wide_Wide_Width_Wide_Wide_Char (
|
|
-- Wide_Wide_Character (typ'First),
|
|
-- Wide_Wide_Character (typ'Last));
|
|
|
|
-- For real types, typ'Width and typ'Wide_[Wide_]Width expand into
|
|
|
|
-- if Ptyp'First > Ptyp'Last then 0 else btyp'Width end if
|
|
|
|
-- where btyp is the base type. This looks recursive but it isn't
|
|
-- because the base type is always static, and hence the expression
|
|
-- in the else is reduced to an integer literal.
|
|
|
|
-- For user defined enumeration types, typ'Width expands into
|
|
|
|
-- Result_Type (Width_Enumeration_NN
|
|
-- (typS,
|
|
-- typI'Address,
|
|
-- typ'Pos (typ'First),
|
|
-- typ'Pos (Typ'Last)));
|
|
|
|
-- and typ'Wide_Width expands into:
|
|
|
|
-- Result_Type (Wide_Width_Enumeration_NN
|
|
-- (typS,
|
|
-- typI,
|
|
-- typ'Pos (typ'First),
|
|
-- typ'Pos (Typ'Last))
|
|
-- Wide_Character_Encoding_Method);
|
|
|
|
-- and typ'Wide_Wide_Width expands into:
|
|
|
|
-- Result_Type (Wide_Wide_Width_Enumeration_NN
|
|
-- (typS,
|
|
-- typI,
|
|
-- typ'Pos (typ'First),
|
|
-- typ'Pos (Typ'Last))
|
|
-- Wide_Character_Encoding_Method);
|
|
|
|
-- where typS and typI are the enumeration image strings and
|
|
-- indexes table, as described in Build_Enumeration_Image_Tables.
|
|
-- NN is 8/16/32 for depending on the element type for typI.
|
|
|
|
procedure Expand_Width_Attribute (N : Node_Id; Attr : Atype := Normal) is
|
|
Loc : constant Source_Ptr := Sloc (N);
|
|
Typ : constant Entity_Id := Etype (N);
|
|
Pref : constant Node_Id := Prefix (N);
|
|
Ptyp : constant Entity_Id := Etype (Pref);
|
|
Rtyp : constant Entity_Id := Root_Type (Ptyp);
|
|
XX : RE_Id;
|
|
YY : Entity_Id;
|
|
Arglist : List_Id;
|
|
Ttyp : Entity_Id;
|
|
|
|
begin
|
|
-- Types derived from Standard.Boolean
|
|
|
|
if Rtyp = Standard_Boolean then
|
|
XX := RE_Width_Boolean;
|
|
YY := Rtyp;
|
|
|
|
-- Types derived from Standard.Character
|
|
|
|
elsif Rtyp = Standard_Character then
|
|
case Attr is
|
|
when Normal => XX := RE_Width_Character;
|
|
when Wide => XX := RE_Wide_Width_Character;
|
|
when Wide_Wide => XX := RE_Wide_Wide_Width_Character;
|
|
end case;
|
|
|
|
YY := Rtyp;
|
|
|
|
-- Types derived from Standard.Wide_Character
|
|
|
|
elsif Rtyp = Standard_Wide_Character then
|
|
case Attr is
|
|
when Normal => XX := RE_Width_Wide_Character;
|
|
when Wide => XX := RE_Wide_Width_Wide_Character;
|
|
when Wide_Wide => XX := RE_Wide_Wide_Width_Wide_Character;
|
|
end case;
|
|
|
|
YY := Rtyp;
|
|
|
|
-- Types derived from Standard.Wide_Wide_Character
|
|
|
|
elsif Rtyp = Standard_Wide_Wide_Character then
|
|
case Attr is
|
|
when Normal => XX := RE_Width_Wide_Wide_Character;
|
|
when Wide => XX := RE_Wide_Width_Wide_Wide_Character;
|
|
when Wide_Wide => XX := RE_Wide_Wide_Width_Wide_Wide_Char;
|
|
end case;
|
|
|
|
YY := Rtyp;
|
|
|
|
-- Signed integer types
|
|
|
|
elsif Is_Signed_Integer_Type (Rtyp) then
|
|
XX := RE_Width_Long_Long_Integer;
|
|
YY := Standard_Long_Long_Integer;
|
|
|
|
-- Modular integer types
|
|
|
|
elsif Is_Modular_Integer_Type (Rtyp) then
|
|
XX := RE_Width_Long_Long_Unsigned;
|
|
YY := RTE (RE_Long_Long_Unsigned);
|
|
|
|
-- Real types
|
|
|
|
elsif Is_Real_Type (Rtyp) then
|
|
|
|
Rewrite (N,
|
|
Make_Conditional_Expression (Loc,
|
|
Expressions => New_List (
|
|
|
|
Make_Op_Gt (Loc,
|
|
Left_Opnd =>
|
|
Make_Attribute_Reference (Loc,
|
|
Prefix => New_Reference_To (Ptyp, Loc),
|
|
Attribute_Name => Name_First),
|
|
|
|
Right_Opnd =>
|
|
Make_Attribute_Reference (Loc,
|
|
Prefix => New_Reference_To (Ptyp, Loc),
|
|
Attribute_Name => Name_Last)),
|
|
|
|
Make_Integer_Literal (Loc, 0),
|
|
|
|
Make_Attribute_Reference (Loc,
|
|
Prefix => New_Reference_To (Base_Type (Ptyp), Loc),
|
|
Attribute_Name => Name_Width))));
|
|
|
|
Analyze_And_Resolve (N, Typ);
|
|
return;
|
|
|
|
-- User defined enumeration types
|
|
|
|
else
|
|
pragma Assert (Is_Enumeration_Type (Rtyp));
|
|
|
|
if Discard_Names (Rtyp) then
|
|
|
|
-- This is a configurable run-time, or else a restriction is in
|
|
-- effect. In either case the attribute cannot be supported. Force
|
|
-- a load error from Rtsfind to generate an appropriate message,
|
|
-- as is done with other ZFP violations.
|
|
|
|
declare
|
|
pragma Warnings (Off); -- since Discard is unreferenced
|
|
Discard : constant Entity_Id := RTE (RE_Null);
|
|
pragma Warnings (On);
|
|
begin
|
|
return;
|
|
end;
|
|
end if;
|
|
|
|
Ttyp := Component_Type (Etype (Lit_Indexes (Rtyp)));
|
|
|
|
case Attr is
|
|
when Normal =>
|
|
if Ttyp = Standard_Integer_8 then
|
|
XX := RE_Width_Enumeration_8;
|
|
elsif Ttyp = Standard_Integer_16 then
|
|
XX := RE_Width_Enumeration_16;
|
|
else
|
|
XX := RE_Width_Enumeration_32;
|
|
end if;
|
|
|
|
when Wide =>
|
|
if Ttyp = Standard_Integer_8 then
|
|
XX := RE_Wide_Width_Enumeration_8;
|
|
elsif Ttyp = Standard_Integer_16 then
|
|
XX := RE_Wide_Width_Enumeration_16;
|
|
else
|
|
XX := RE_Wide_Width_Enumeration_32;
|
|
end if;
|
|
|
|
when Wide_Wide =>
|
|
if Ttyp = Standard_Integer_8 then
|
|
XX := RE_Wide_Wide_Width_Enumeration_8;
|
|
elsif Ttyp = Standard_Integer_16 then
|
|
XX := RE_Wide_Wide_Width_Enumeration_16;
|
|
else
|
|
XX := RE_Wide_Wide_Width_Enumeration_32;
|
|
end if;
|
|
end case;
|
|
|
|
Arglist :=
|
|
New_List (
|
|
New_Occurrence_Of (Lit_Strings (Rtyp), Loc),
|
|
|
|
Make_Attribute_Reference (Loc,
|
|
Prefix => New_Occurrence_Of (Lit_Indexes (Rtyp), Loc),
|
|
Attribute_Name => Name_Address),
|
|
|
|
Make_Attribute_Reference (Loc,
|
|
Prefix => New_Reference_To (Ptyp, Loc),
|
|
Attribute_Name => Name_Pos,
|
|
|
|
Expressions => New_List (
|
|
Make_Attribute_Reference (Loc,
|
|
Prefix => New_Reference_To (Ptyp, Loc),
|
|
Attribute_Name => Name_First))),
|
|
|
|
Make_Attribute_Reference (Loc,
|
|
Prefix => New_Reference_To (Ptyp, Loc),
|
|
Attribute_Name => Name_Pos,
|
|
|
|
Expressions => New_List (
|
|
Make_Attribute_Reference (Loc,
|
|
Prefix => New_Reference_To (Ptyp, Loc),
|
|
Attribute_Name => Name_Last))));
|
|
|
|
Rewrite (N,
|
|
Convert_To (Typ,
|
|
Make_Function_Call (Loc,
|
|
Name => New_Reference_To (RTE (XX), Loc),
|
|
Parameter_Associations => Arglist)));
|
|
|
|
Analyze_And_Resolve (N, Typ);
|
|
return;
|
|
end if;
|
|
|
|
-- If we fall through XX and YY are set
|
|
|
|
Arglist := New_List (
|
|
Convert_To (YY,
|
|
Make_Attribute_Reference (Loc,
|
|
Prefix => New_Reference_To (Ptyp, Loc),
|
|
Attribute_Name => Name_First)),
|
|
|
|
Convert_To (YY,
|
|
Make_Attribute_Reference (Loc,
|
|
Prefix => New_Reference_To (Ptyp, Loc),
|
|
Attribute_Name => Name_Last)));
|
|
|
|
Rewrite (N,
|
|
Convert_To (Typ,
|
|
Make_Function_Call (Loc,
|
|
Name => New_Reference_To (RTE (XX), Loc),
|
|
Parameter_Associations => Arglist)));
|
|
|
|
Analyze_And_Resolve (N, Typ);
|
|
end Expand_Width_Attribute;
|
|
|
|
end Exp_Imgv;
|