July 2017 - Oberon - mailman3.inf.ethz.ch

Re: [Oberon] Re (2): Class Methods Vs. Procedure variables in Records
by peter＠easthope.ca 02 Jul '17

02 Jul '17

From: Andreas Pirklbauer <andreas_pirklbauer(a)yahoo.com> Date: Sun, 2 Jul 2017 13:09:01 +0000 > I wrote it on the go, while waiting for a plane, so I'm not sure its > language is refined enough to qualify for an essay :-) Well, it turned out rather clear and helpful. > I have not checked, but how does one upload something to the Wikibook? Better from the mouth of the horse than from a poor restatement by me. Open https://en.wikibooks.org/ . In the left margin click on Help. There click on Contributing. Also, Editing. Incidentally, if you write something which you don't want changed, it can be protected. > Who maintains it? Anyone willing to help. We 7 x 10^9 humans on this little planet must rely on ourselves. FWIIW, I started this Oberon book but consider myself a custodian, analogous to a janitor in a school. The janitor doesn't teach the classes. Just tries to keep the facilities reasonably clean and tidy. > What is its goal? I continue to use PC Native O. and UnixAos, Oberon as workstations and am dismayed that many small bugs and oddities are not fixed in a public archive or distribution. Each user must repair the same faulty bearings & loose bolts in a new car. =8~( As mentioned to Bernhard, many or most of us are past middle age and none will live forever. I'm concerned that without some broadly accepted records, Oberon will be forgotten after a generation. So the wikibook might address some concerns. > I'll probably just create a pdf version, together with the source, and leav= > e it to others to publish the text on a platform of their choosing. Good, although inserting directly to the book might be easier than creating a PDF. From: "Skulski, Wojciech" <skulski(a)pas.rochester.edu> Date: Sun, 2 Jul 2017 13:38:03 +0000 > Somehow I do not like the wiki. You and Joerg express similar sentiments. I know the wikibook is not ideal. What is better? Regards, ... Lyall E. -- 123456789 123456789 123456789 123456789 123456789 123456789 123456789 Tel: +1 360 639 0202 Pender Is.: +1 250 629 3757 http://easthope.ca/Peter.html Bcc: peter at easthope. ca

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Re (2): Class Methods Vs. Procedure variables in Records
by Andreas Pirklbauer 02 Jul '17

02 Jul '17

I wrote it on the go, while waiting for a plane, so I'm not sure its language is refined enough to qualify for an essay :-) If I had to publish something on that topic, I would certainly write it very differently, with proper references etc. On the Oberon list, I only wished to quickly respond to a question asked by Srinivas. But I'd be happy to prepare a "combined" version of these entries -- if I recall correctly, there were in fact multiple entries on that topic back a few months ago. PS: I have not checked, but how does one upload something to the Wikibook? Who maintains it? What is its goal? Andreas > From: Srinivas Nayak <sinu.nayak2001 at gmail.com> > Date: Wed, 1 Mar 2017 11:13:35 +0530 > > My hearty thanks to Andreas for sheding light on this matter. > > When I read his post, I felt, it should have been a journal paper. > > Nice language. Great presentation. Simply awesome. > > Well expressed Srinivas. Andreas' essay will remain in the list > archive but would be a superb contribution to the Oberon wikibook. > Certainly it would be more prominent there. If you are willing to > entertain this Andreas, please add it or permit someone to do so. > If you are concerned that inept editing might distort the meaning, > it can be a quotation, citing the mailing list as source. > > Thanks, ... Lyall E. --

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Re (2): Class Methods Vs. Procedure variables in Records
by peter＠easthope.ca 02 Jul '17

02 Jul '17

From: Srinivas Nayak <sinu.nayak2001(a)gmail.com> Date: Wed, 1 Mar 2017 11:13:35 +0530 > My hearty thanks to Andreas for sheding light on this matter. > When I read his post, I felt, it should have been a journal paper. > Nice language. Great presentation. Simply awesome. Well expressed Srinivas. Andreas' essay will remain in the list archive but would be a superb contribution to the Oberon wikibook. Certainly it would be more prominent there. If you are willing to entertain this Andreas, please add it or permit someone to do so. If you are concerned that inept editing might distort the meaning, it can be a quotation, citing the mailing list as source. Thanks, ... Lyall E. -- 123456789 123456789 123456789 123456789 123456789 123456789 123456789 Tel: +1 360 639 0202 Pender Is.: +1 250 629 3757 http://easthope.ca/Peter.html Bcc: peter at easthope. ca

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Re: [Oberon] LONGINT, RETURN & etc. (Chris Burrows)
by Артур Ефимов 01 Jul '17

01 Jul '17

> "Single-character strings can also be assigned to variables of type CHAR." Yes, I thought about that, but only after I had sent the message. A single character string can be returned, as it may be interpreted as a character literal. Oberon 2 isn't different to other versions of Oberon in this sense. >From the syntax point of view, single-character string literals and character literals look the same in Oberon. One and the same expression "A" can be interpreted in two different ways by the compiler. (* "A" is interpreted as ARRAY OF CHAR *) VAR s: ARRAY 10 OF CHAR; BEGIN COPY("A", s) (* or s := "A" in Oberon-07 *) (* "A" is interpreted as CHAR *) VAR ch: CHAR; BEGIN ch := "A" This is not a problem, as the compiler handles this with a simple IF statement (something like "IF (char expected) & (type = string) & (length = 1) THEN type := char END"). This may be more tricky in case of constants: CONST x = "A"; There is nothing about this in the language report; however, Oberon compilers handle these situations very well. Arthur Efimov

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