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-- CA21001.A

--

--                             Grant of Unlimited Rights

--

--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687 and

--     F08630-91-C-0015, the U.S. Government obtained unlimited rights in the

--     software and documentation contained herein.  Unlimited rights are

--     defined in DFAR 252.227-7013(a)(19).  By making this public release,

--     the Government intends to confer upon all recipients unlimited rights

--     equal to those held by the Government.  These rights include rights to

--     use, duplicate, release or disclose the released technical data and

--     computer software in whole or in part, in any manner and for any purpose

--     whatsoever, and to have or permit others to do so.

--

--                                    DISCLAIMER

--

--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR

--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED

--     WARRANTY AS TO ANY MATTER WHATSOVER, INCLUDING THE CONDITIONS OF THE

--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE

--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A

--     PARTICULAR PURPOSE OF SAID MATERIAL.

--*

--

-- OBJECTIVE

--     Check the requirements of the revised 10.2.1(11) from Technical

--     Corrigendum 1 (originally discussed as AI95-00002).

--     A package subunit whose parent is a preelaborated subprogram need

--     not be preelaborable.

--

-- TEST DESCRIPTION

--     We create several preelaborated library procedures with

--     non-preelaborable package body subunits.  We try various levels

--     of nesting of package and procedure subunits.

--

-- CHANGE HISTORY:

--      29 JUN 1999   RAD   Initial Version

--      23 SEP 1999   RLB   Improved comments, renamed, issued.

--

--!

procedure CA21001_1(X: out Integer);

    pragma Preelaborate(CA21001_1);

procedure CA21001_1(X: out Integer) is

    function F return Integer is separate;

    package Sub is

        function G(X: Integer) return Integer;

            -- Returns X + 1.

        Not_Preelaborable: Integer := F; -- OK, by AI-2.

    end Sub;

    package body Sub is separate;

begin

    X := -1;

    X := F;

    X := Sub.G(X);

end CA21001_1;

separate(CA21001_1)

package body Sub is

    package Sub_Sub is

        -- Empty.

    end Sub_Sub;

    package body Sub_Sub is separate;

    function G(X: Integer) return Integer is separate;

begin

    Not_Preelaborable := G(F); -- OK, by AI-2.

    if Not_Preelaborable /= 101 then

        raise Program_Error; -- Can't call Report.Failed, here,

            -- because Report is not preelaborated.

    end if;

end Sub;

separate(CA21001_1.Sub)

package body Sub_Sub is

begin

    X := X; -- OK by AI-2.

end Sub_Sub;

separate(CA21001_1.Sub)

function G(X: Integer) return Integer is

    package G_Sub is

        function H(X: Integer) return Integer;

            -- Returns X + 1.

        Not_Preelaborable: Integer := F; -- OK, by AI-2.

    end G_Sub;

    package body G_Sub is separate;

begin

    return G_Sub.H(X);

end G;

separate(CA21001_1.Sub.G)

package body G_Sub is

    function H(X: Integer) return Integer is separate;

begin

    Not_Preelaborable := H(F); -- OK, by AI-2.

    if Not_Preelaborable /= 101 then

        raise Program_Error; -- Can't call Report.Failed, here,

            -- because Report is not preelaborated.

    end if;

end G_Sub;

separate(CA21001_1.Sub.G.G_Sub)

function H(X: Integer) return Integer is

begin

    return X + 1;

end H;

separate(CA21001_1)

function F return Integer is

    package F_Sub is

        -- Empty.

    end F_Sub;

    package body F_Sub is separate;

begin

    return 100;

end F;

separate(CA21001_1.F)

package body F_Sub is

    True_Var: Boolean;

begin

    True_Var := True;

    if True_Var then -- OK by AI-2.

        X := X;

    else

        X := X + 2;

    end if;

end F_Sub;

with Report; use Report;

with CA21001_1;

procedure CA21001 is

    X: Integer := 0;

begin

    Test("CA21001",

         "Test that a package subunit whose parent is a preelaborated"

         & " subprogram need not be preelaborable");

    CA21001_1(X);

    if X /= 101 then

        Failed("Bad value for X");

    end if;

    Result;

end CA21001;