thedl0-usenet1@yahoo.com (Daryle Walker) writes:

| [Apologies if this was already reported.]
|
| This comes from a thread I started in comp.lang.c++.moderated with
| article {1gtisb8.1g99vu39aav4N%thedl0-usenet1@yahoo.com}
|
| The "this" expression is marked as a "non-lvalue" in 9.3.2/1.  Another
| poster said that the phrase "non-lvalue" also appears in footnote 49.  I
| heard of lvalues and rvalues, and I thought that non-lvalues were some
| unmentioned third category.  However, 3.10/1 only gives two categories
| for expressions, lvalues and rvalues.  This means that "non-lvalue" is
| probably some archaic synonym for "rvalue" (assuming that the word
| "rvalue" was invented after "lvalue" was used).

Basically, yes.  "rvalue" is an invention for C++98 (meaning non-lvalue).
C90, on which C++98 was based, uses "lvalue" and "non-lvalue".

--
                                                        Gabriel Dos Reis
                                                         gdr@cs.tamu.edu
 Texas A&M University -- Department of Computer Science
 301, Bright Building -- College Station, TX 77843-3112

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[Apologies if this was already reported.]

This comes from a thread I started in comp.lang.c++.moderated with
article {1gtisb8.1g99vu39aav4N%thedl0-usenet1@yahoo.com}

The "this" expression is marked as a "non-lvalue" in 9.3.2/1.  Another
poster said that the phrase "non-lvalue" also appears in footnote 49.  I
heard of lvalues and rvalues, and I thought that non-lvalues were some
unmentioned third category.  However, 3.10/1 only gives two categories
for expressions, lvalues and rvalues.  This means that "non-lvalue" is
probably some archaic synonym for "rvalue" (assuming that the word
"rvalue" was invented after "lvalue" was used).

If non-lvalues are rvalues, then the terms should be changed to "rvalue"
for clarity.  If there really is a third expression category, neither
lvalue nor rvalue, then that needs to be explained somewhere instead
(and given a better name than "non-lvalue," since it would also be a
non-rvalue).

--
Daryle Walker
Mac, Internet, and Video Game Junkie
dwalker07 AT snet DOT net

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