From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.3 required=5.0 tests=BAYES_00,INVALID_MSGID autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: fac41,b87849933931bc93 X-Google-Attributes: gidfac41,public X-Google-Thread: 109fba,b87849933931bc93 X-Google-Attributes: gid109fba,public X-Google-Thread: 1108a1,b87849933931bc93 X-Google-Attributes: gid1108a1,public X-Google-Thread: 103376,b87849933931bc93 X-Google-Attributes: gid103376,public X-Google-Thread: 114809,b87849933931bc93 X-Google-Attributes: gid114809,public X-Google-Thread: f43e6,b87849933931bc93 X-Google-Attributes: gidf43e6,public From: doylep@ecf.toronto.edu (Patrick Doyle) Subject: Re: OO, C++, and something much better! Date: 1997/01/18 Message-ID: #1/1 X-Deja-AN: 210680818 x-nntp-posting-host: skule.ecf sender: news@ecf.toronto.edu (News Administrator) references: organization: University of Toronto, Engineering Computing Facility newsgroups: comp.lang.c++,comp.lang.smalltalk,comp.lang.eiffel,comp.lang.ada,comp.object,comp.software-eng Date: 1997-01-18T00:00:00+00:00 List-Id: In article , Don Harrison wrote: > >The following is a valid Ada83 program (and presumably valid Ada95): > >procedure Test_Type_Hole is > subtype Sub_Integer is Integer range 1 .. 10; > I: Integer; > S: Sub_Integer; > > procedure Use_Subtype (S: Sub_Integer) is > begin > null; > end; > >begin > I := 1000; > Use_Subtype (I); -- System Invalid call - raises > -- Constraint_Error at runtime. >end Test_Type_Hole; > >So, contrary to your claim, Ada *does* permit a form of broken polymorphism. To me, this seems more of a broken assertion than broken polymorphism. (However, I've never use Ada in my life... :-) -PD -- -- Patrick Doyle doylep@ecf.utoronto.ca