-- Copyright 2009-2018 Free Software Foundation, Inc. -- -- This program is free software; you can redistribute it and/or modify -- it under the terms of the GNU General Public License as published by -- the Free Software Foundation; either version 3 of the License, or -- (at your option) any later version. -- -- This program is distributed in the hope that it will be useful, -- but WITHOUT 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 -- along with this program. If not, see . procedure Foo is type Small is range -32 .. 31; type SomePackedArray is array (Integer range <>) of Small; pragma Pack (SomePackedArray); type SomePackedRecord is record Y: SomePackedArray (1 .. 10); end record; pragma Pack (SomePackedRecord); Suite : SomePackedArray := (-1, -2, -3, -4, -5, -6, -7, -8, -9, -10); XP: SomePackedRecord := (Y => Suite); Slice : SomePackedArray renames XP.Y (3 .. 5); begin Slice (4) := 4; -- START end Foo;