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=ham autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,448990452c132610 X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2002-03-01 09:55:27 PST Newsgroups: comp.lang.ada Path: archiver1.google.com!news1.google.com!newsfeed.stanford.edu!newsmi-us.news.garr.it!NewsITBone-GARR!newsfeed.media.kyoto-u.ac.jp!newsfeed.mesh.ad.jp!osa.uu.net!sac.uu.net!ash.uu.net!xyzzy!nntp From: Jeffrey Carter Subject: Re: The making of compilers X-Nntp-Posting-Host: e246420.msc.az.boeing.com Content-Type: text/plain; charset=us-ascii Message-ID: <3C7FBB7D.E82B077A@boeing.com> Sender: nntp@news.boeing.com (Boeing NNTP News Access) Content-Transfer-Encoding: 7bit Organization: The Boeing Company X-Accept-Language: en References: <5ee5b646.0202250655.6fd2bfb8@posting.google.com> <9ff447f2.0202261716.33ea286f@posting.google.com> <3C7D1B7A.5A17002E@boeing.com> <5ee5b646.0202282100.59d56dde@posting.google.com> Mime-Version: 1.0 Date: Fri, 1 Mar 2002 17:33:49 GMT X-Mailer: Mozilla 4.73 [en]C-CCK-MCD Boeing Kit (WinNT; U) Xref: archiver1.google.com comp.lang.ada:20659 Date: 2002-03-01T17:33:49+00:00 List-Id: Robert Dewar wrote: > > Jeffrey Carter wrote in message news:<3C7D1B7A.5A17002E@boeing.com>... > > My recollection of a talk by Ichbiah (at the time) was that they wrote > > the Alsys compiler in Ada 83 and wrote a program (presumably in PL/1) to > > translate Ada 83 to PL/1. Once the executable worked well enough, of > > course, they stopped using the translator and just compiled the compiler > > with the compiler. > > Yes, that's exactly right, and that's what I meant by a > subset compiler written in PL/1 (converting Ada to another > language is one possible way of writing a compiler for > Ada, even today there are Ada 95 compilers that work by > translating to C). I guess we use different terms for the same thing: I wouldn't use the term "written in PL/1" to describe translating Ada to PL/1 anymore than I'd say something compiled using a compiler that outputs C was "written in C". -- Jeffrey Carter