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=-1.9 required=5.0 tests=BAYES_00 autolearn=unavailable autolearn_force=no version=3.4.4 Path: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!feeder.eternal-september.org!aioe.org!.POSTED!not-for-mail From: "Dmitry A. Kazakov" Newsgroups: comp.lang.ada Subject: Re: questions on RM's section of subprograms and dispatching Date: Fri, 23 Feb 2018 21:57:53 +0100 Organization: Aioe.org NNTP Server Message-ID: References: NNTP-Posting-Host: b3/KWLDSh2Q785SrqKUcjA.user.gioia.aioe.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Complaints-To: abuse@aioe.org User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 X-Notice: Filtered by postfilter v. 0.8.3 Content-Language: en-US Xref: reader02.eternal-september.org comp.lang.ada:50614 Date: 2018-02-23T21:57:53+01:00 List-Id: On 2018-02-23 21:43, Simon Wright wrote: > Mehdi Saada <00120260a@gmail.com> writes: > >> tagged types with abstract primitives must be abstract, and can have >> only abstract primitives > > This isn't true; abstract types can have concrete primitives. Yes, only interfaces cannot. Interface is a form of abstract type. (The limitation is meaningless from the software design POV. In the case of interfaces it was motivated by compiler implementation concerns.) -- Regards, Dmitry A. Kazakov http://www.dmitry-kazakov.de