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[basic.life][class.dtor] Turn normatively redundant paragraphs for double destruction into notes #6389

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[basic.life][class.dtor] Turn normatively redundant paragraphs for double destruction into notes #6389

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0de9d25
[basic.life] Turn the normatively redundant paragraph into a note
frederick-vs-ja Jul 19, 2023
ca50a70
[class.dtor] Turn the normatively redundant paragraph into a note
frederick-vs-ja Jul 19, 2023
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27 changes: 13 additions & 14 deletions source/basic.tex
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Expand Up @@ -3622,22 +3622,21 @@
\end{note}

\pnum
If a program ends the lifetime of an object of type \tcode{T} with
static\iref{basic.stc.static}, thread\iref{basic.stc.thread},
or automatic\iref{basic.stc.auto}
storage duration and if \tcode{T} has a non-trivial destructor,
\begin{note}
If a program ends the lifetime of an object for which a destructor
will be called implicitly,
\begin{footnote}
That
is, an object for which a destructor will be called
implicitly---upon exit from the block for an object with
automatic storage duration, upon exit from the thread for an object with
thread storage duration, or upon exit from the program for an object
with static storage duration.
The destructor will be called upon exit from the block for an object with
automatic storage duration\iref{basic.stc.auto}, upon exit from the thread
for an object with thread storage duration\iref{basic.stc.thread}, or upon
exit from the program for an object with
static storage duration\iref{basic.stc.static}.
\end{footnote}
and another object of the original type does not occupy
that same storage location when the implicit destructor call takes
place, the behavior of the program is undefined. This is true
even if the block is exited with an exception.
and the object is not transparently replaceable by another object that is
within its lifetime when the implicit destructor call takes place,
the behavior of the program is undefined. This is true even if the block is
exited with an exception.
\end{note}
\begin{example}
\begin{codeblock}
class T { };
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2 changes: 2 additions & 0 deletions source/classes.tex
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Expand Up @@ -2270,9 +2270,11 @@
\end{note}

\pnum
\begin{note}
Once a destructor is invoked for an object, the object's lifetime ends;
the behavior is undefined if the destructor is invoked
for an object whose lifetime has ended\iref{basic.life}.
\end{note}
\begin{example}
If the destructor for an object with automatic storage duration is explicitly invoked,
and the block is subsequently left in a manner that would ordinarily
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