Clarifying "the value of the expression" in simple assignment expression #1966
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In simple assignment (=), the value of the expression replaces that of the
object referred to by the left operand.
End quote.
I think "the value of the expression" means the right operand of a simple
assignment, not the whole simple assignment expression, because [expr.ass]p2
describes the semantics of a simple assignment and because of the following
that I quote from Footnote 64 in 6.3.2.1/1 of WG14 N1570, the latest publicly
available draft of the C11 standard accessible at
http://open-std.org/jtc1/sc22/wg14/www/standards:
The name ‘‘lvalue’’ comes originally from the assignment expression E1 =
E2, [...] What is sometimes called ‘‘rvalue’’ is in this International
Standard described as the ‘‘value of an expression’’.
End quote.
Since this ISO C++ draft does not have such a footnote, I propose to rewrite
[expr.ass]p2 as given in this commit. Richard Smith has reviewed my proposal
and made my original rewrite more precise at https://goo.gl/tvD8Pu.
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See #720. |
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Good that the issue was brought up about two years ago. So, I think I will notify @zygoloid who suggested me to open this editorial issue in the first place. |
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I have notified @zygoloid at https://goo.gl/nVUVRc. |
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To quote [expr.ass]p2,
End quote.
I think "the value of the expression" means the right operand of a simple
assignment, not the whole simple assignment expression, because [expr.ass]p2
describes the semantics of a simple assignment and because of the following
that I quote from Footnote 64 in 6.3.2.1/1 of WG14 N1570, the latest publicly
available draft of the C11 standard accessible at
http://open-std.org/jtc1/sc22/wg14/www/standards:
End quote.
Since this ISO C++ draft does not have such a footnote, I propose to rewrite
[expr.ass]p2 as given in this commit. Richard Smith has reviewed my proposal
and made my original rewrite more precise at https://goo.gl/tvD8Pu.