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[CWG motion 2 2024-06] issues 2819, 2858, and 2876 in P3345R0 (Core Language Working Group "ready" Issues) #7100

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Jul 12, 2024
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[CWG motion 2 2024-06] issues 2819, 2858, and 2876 in P3345R0 (Core Language Working Group "ready" Issues) #7100

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911c922
CWG2819 Cast from null pointer value in a constant expression
burblebee Jul 1, 2024
a586edd
CWG2858 Declarative nested-name-specifiers and pack-index-specifiers
burblebee Jul 1, 2024
694b7a7
CWG2876 Disambiguation of T x = delete("text")
burblebee Jul 2, 2024
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25 changes: 19 additions & 6 deletions source/declarations.tex
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Expand Up @@ -256,16 +256,29 @@
\end{codeblock}
\end{example}

\pnum
\indextext{initialization!definition and}%
An object definition causes
storage of appropriate size and alignment to be reserved and
any appropriate initialization\iref{dcl.init} to be done.

\pnum
\indextext{definition!declaration as}%
Syntactic components beyond those found in the general form of
\grammarterm{simple-declaration} are added to a function declaration to make a
\grammarterm{function-definition}. An object declaration, however, is also
a definition unless it contains the \keyword{extern} specifier and has no
initializer\iref{basic.def}.
\indextext{initialization!definition and}%
An object definition causes storage of appropriate size and alignment to be reserved and
any appropriate initialization\iref{dcl.init} to be done.
\grammarterm{function-definition}.
A token sequence starting with \tcode{\{} or \tcode{=}
is treated as a \grammarterm{function-body}\iref{dcl.fct.def.general}
if the type of the \grammarterm{declarator-id}\iref{dcl.meaning.general}
is a function type, and
is otherwise
treated as a \grammarterm{brace-or-equal-initializer}\iref{dcl.init.general}.
\begin{note}
If the declaration acquires a function type through template instantiation,
the program is ill-formed; see \ref{temp.spec.general}.
The function type of a function definition
cannot be specified with a \grammarterm{typedef-name}\iref{dcl.fct}.
\end{note}

\pnum
A \grammarterm{nodeclspec-function-declaration} shall declare a
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6 changes: 4 additions & 2 deletions source/expressions.tex
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Expand Up @@ -1661,7 +1661,7 @@
a declarative \grammarterm{nested-name-specifier}.
\end{itemize}
A declarative \grammarterm{nested-name-specifier}
shall not have a \grammarterm{decltype-specifier}.
shall not have a \grammarterm{computed-type-specifier}.
A declaration that uses a declarative \grammarterm{nested-name-specifier}
shall be a friend declaration or
inhabit a scope that contains the entity being redeclared or specialized.
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from a prvalue \tcode{P} of type ``pointer to \cv{}~\keyword{void}''
to a type ``\cvqual{cv1} pointer to \tcode{T}'',
where \tcode{T} is not \cvqual{cv2}~\keyword{void},
unless \tcode{P} points to an object whose type is similar to \tcode{T};
unless \tcode{P}
is a null pointer value or
points to an object whose type is similar to \tcode{T};

\item
a \keyword{reinterpret_cast}\iref{expr.reinterpret.cast};
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