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-- C420001.A

--

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--

--     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 that if the index subtype of a string type is a modular subtype

--     whose lower bound is zero, then the evaluation of a null string_literal

--     raises Constraint_Error. This was confirmed by AI95-00138.

--

-- TEST DESCRIPTION

--     In this test, we have a generic formal modular type, and we have

--     several null string literals of that type.  Because the type is

--     generic formal, the string literals are not static, and therefore

--     the Constraint_Error should be detected at run time.

--

-- CHANGE HISTORY:

--      29 JUN 1999   RAD   Initial Version

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

--

--!

with Report; use Report; pragma Elaborate_All(Report);

with System;

procedure C420001 is

    generic

        type Modular is mod <>;

    package Mod_Test is

        type Str is array(Modular range <>) of Character;

        procedure Test_String_Literal;

    end Mod_Test;

    package body Mod_Test is

        procedure Test_String_Literal is

        begin

            begin

                declare

                    Null_String: Str := ""; -- Should raise C_E.

                begin

                    Comment(String(Null_String)); -- Avoid 11.6 issues.

                end;

                Failed("Null string didn't raise Constraint_Error");

            exception

                when Exc: Constraint_Error =>

                    null; -- Comment("Constraint_Error -- OK");

                when Exc2: others =>

                    Failed("Null string raised wrong exception");

            end;

            begin

                Failed(String(Str'(""))); -- Should raise C_E, not do Failed.

                Failed("Null string didn't raise Constraint_Error");

            exception

                when Exc: Constraint_Error =>

                    null; -- Comment("Constraint_Error -- OK");

                when Exc2: others =>

                    Failed("Null string raised wrong exception");

            end;

        end Test_String_Literal;

    begin

        Test_String_Literal;

    end Mod_Test;

begin

    Test("C420001", "Check that if the index subtype of a string type is a " &

                    "modular subtype whose lower bound is zero, then the " &

                    "evaluation of a null string_literal raises " &

                    "Constraint_Error. ");

    declare

        type M1 is mod 1;

        package Test_M1 is new Mod_Test(M1);

        type M2 is mod 2;

        package Test_M2 is new Mod_Test(M2);

        type M3 is mod 3;

        package Test_M3 is new Mod_Test(M3);

        type M4 is mod 4;

        package Test_M4 is new Mod_Test(M4);

        type M5 is mod 5;

        package Test_M5 is new Mod_Test(M5);

        type M6 is mod 6;

        package Test_M6 is new Mod_Test(M6);

        type M7 is mod 7;

        package Test_M7 is new Mod_Test(M7);

        type M8 is mod 8;

        package Test_M8 is new Mod_Test(M8);

        type M_Max_Binary_Modulus is mod System.Max_Binary_Modulus;

        package Test_M_Max_Binary_Modulus is new Mod_Test(M_Max_Binary_Modulus);

        type M_Max_Nonbinary_Modulus is mod System.Max_Nonbinary_Modulus;

        package Test_M_Max_Nonbinary_Modulus is new Mod_Test(M_Max_Nonbinary_Modulus);

    begin

        null;

    end;

    Result;

end C420001;