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=0.2 required=5.0 tests=BAYES_00,INVALID_MSGID, REPLYTO_WITHOUT_TO_CC autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 109fba,b87849933931bc93 X-Google-Attributes: gid109fba,public X-Google-Thread: fac41,b87849933931bc93 X-Google-Attributes: gidfac41,public X-Google-Thread: 103376,b87849933931bc93 X-Google-Attributes: gid103376,public X-Google-Thread: f43e6,b87849933931bc93 X-Google-Attributes: gidf43e6,public X-Google-Thread: 1108a1,b87849933931bc93 X-Google-Attributes: gid1108a1,public X-Google-Thread: 114809,b87849933931bc93 X-Google-Attributes: gid114809,public From: donh@syd.csa.com.au (Don Harrison) Subject: Re: OO, C++, and something much better! Date: 1997/01/13 Message-ID: #1/1 X-Deja-AN: 209644062 sender: news@syd.csa.com.au x-nntp-posting-host: dev50 references: organization: CSC Australia, Sydney reply-to: donh@syd.csa.com.au newsgroups: comp.lang.c++,comp.lang.smalltalk,comp.lang.eiffel,comp.lang.ada,comp.object,comp.software-eng Date: 1997-01-13T00:00:00+00:00 List-Id: Jon S Anthony writes: :> For example, by using the value of a parent type where a subrange :> value is required. : :Give an example. 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. :Don. :=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- :Don Harrison donh@syd.csa.com.au : : -- Don. =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Don Harrison donh@syd.csa.com.au