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From: "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com>
Newsgroups: comp.lang.c
Subject: Re: Top 10 most common hard skills listed on resumes...
Date: Tue, 27 Aug 2024 12:50:21 -0700
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On 8/27/2024 12:22 PM, Keith Thompson wrote:
> Ben Bacarisse <ben@bsb.me.uk> writes:
>> 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".
> 
> The documents I have are unsearchable PDFs; they appear to be scans of
> paper documents.
> 
> https://comjnl.oxfordjournals.org/content/6/2/134.full.pdf

I can search this for sure.

> https://www.ancientgeek.org.uk/CPL/CPL_Elementary_Programming_Manual.pdf
> 
> Do you have friendlier documents?
>