Path: ...!weretis.net!feeder9.news.weretis.net!feeder8.news.weretis.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Ben Bacarisse <ben@bsb.me.uk>
Newsgroups: comp.lang.c
Subject: Re: Top 10 most common hard skills listed on resumes...
Date: Tue, 27 Aug 2024 14:18:04 +0100
Organization: A noiseless patient Spider
Lines: 36
Message-ID: <87frqqyuib.fsf@bsb.me.uk>
References: <vab101$3er$1@reader1.panix.com>
	<vad7ns$1g27b$1@raubtier-asyl.eternal-september.org>
	<vad8lr$1fv5u$1@dont-email.me> <vaf7f0$k51$2@reader1.panix.com>
	<vafgb2$1to4v$2@dont-email.me>
	<92ab79736a70ea1563691d22a9b396a20629d8cf@i2pn2.org>
	<vafim7$1ubg8$1@dont-email.me> <vah4hr$2b9i8$5@dont-email.me>
	<vahngt$2dtm9$1@dont-email.me> <87r0abzcsj.fsf@bsb.me.uk>
	<87seurdqts.fsf@nosuchdomain.example.com>
MIME-Version: 1.0
Content-Type: text/plain
Injection-Date: Tue, 27 Aug 2024 15:18:04 +0200 (CEST)
Injection-Info: dont-email.me; posting-host="5013c5103638436a426aa344eaab8e1c";
	logging-data="3153187"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX1/MNo6Sc5pi54eW4vh1xSoPbkBDrrecPaM="
User-Agent: Gnus/5.13 (Gnus v5.13)
Cancel-Lock: sha1:FROXo0Lnlz+p3ZM474k1gtjGbTU=
	sha1:rEttnMcAfOyVn4Nm/Edunlz2mn8=
X-BSB-Auth: 1.ea50ddba20d0f0238fef.20240827141804BST.87frqqyuib.fsf@bsb.me.uk
Bytes: 3010

Keith Thompson <Keith.S.Thompson+u@gmail.com> writes:

> Ben Bacarisse <ben@bsb.me.uk> writes:
>> Bart <bc@freeuk.com> writes:
>>> BLISS is a rather strange language. For something supposedly low level than
>>> C, it doesn't have 'goto'.
>>>
>>> It is also typeless.
>>>
>>> There is also a key feature that sets it apart from most HLLs: usually if
>>> you declare a variable A, then you can access A's value just by writing A;
>>> its address is automatically dereferenced.
>>
>> Not always.  This is where left- and right-evaluation came in.  On the
>> left of an assignment A denotes a "place" to receive a value.  On the
>> right, it denotes a value obtained from a place.  CPL used the terms and
>> C got them via BCPL's documentation.  Viewed like this, BLISS just makes
>> "evaluation" a universal concept.
>
> As I recall, the terms "lvalue" and "rvalue" originated with CPL.  The
> 'l' and 'r' suggest the left and right sides of an assignment.
>
> Disclaimer: I have a couple of CPL documents, and I don't see the terms
> "lvalue" and "rvalue" in a quick look.  The PDFs are not searchable.  If
> someone has better information, please post it.  Wikipedia does say that
> the notion of "l-values" and "r-values" was introduced by CPL.

I presume, since I mentioned the concepts coming from CPL, you are
referring to specifically the short-form terms l- and r-values?

I can't help with those specific terms as the document I have uses a
mixture of terms like "the LH value of...", "left-hand expressions" and
"evaluated in LH mode".

-- 
Ben.