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From: Ben Bacarisse <ben@bsb.me.uk>
Newsgroups: comp.lang.c
Subject: Re: Top 10 most common hard skills listed on resumes...
Date: Thu, 12 Sep 2024 00:47:58 +0100
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Bart <bc@freeuk.com> writes:

> On 11/09/2024 01:02, Ben Bacarisse wrote:
>> Bart <bc@freeuk.com> writes:
>
>>> Sorry, did your remark above suggest I don't know what an lvalue is?
>> That seemed like the obvious explanation for the incorrect information
>> you gave.  Did you post it /knowing/ what other kinds of things are
>> lvalues in C just to confuse people?
>
> Which incorrect explanation was that?
>
> I merely said that LHSs of assigments fall into these categories:
>
>    A = Y;         // name
>    *X = Y;        // pointer
>    X[i] = Y;      // index
>    X.m = Y;       // member select

Yes, that incorrect explanation.

> Clearly I mean VALID LHSs, otherwise they wouldn't be LHSs of assignments!
>
> I've since learnt about a couple of other possible categories; one is with
> compound literals like '(int){42} = 0'.

Along with (a) _Generic expressions (where the selected arm is an
lvalue) and (b) expressions of the form X->m.

> (I don't count (A), ((A)) etc as a
> separate category; come on!)

Don't give me "come on!".  I was counting forms in the same way that you
were when I said I could think of three more.  I was not counting
parentheses.

> The other is 'X.m' but when .m is a bitfield;

What makes X.m = Y, where m is a bitfield, an extra category?  It fits
the X.m = Y pattern perfectly well.

> although this has the same
> same syntax as above, internally it's somewhat different.

Your categories were syntactic.  You were describing forms.

> (My C compiler
> treats bitfields as ordinary members.)
>
> I acknowledge that allowing 'F().m = Y' is wrong;

Thank you.

> I might get around to
> fixing it one day.

-- 
Ben.