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[expr.typeid] Require class type to be complete #4827

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Sep 17, 2021
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[expr.typeid] Require class type to be complete #4827

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10 changes: 7 additions & 3 deletions source/expressions.tex
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Expand Up @@ -3637,6 +3637,12 @@
of the program. Whether or not the destructor is called for the
\tcode{std::type_info} object at the end of the program is unspecified.

\pnum
If the type of the \grammarterm{expression} or \grammarterm{type-id} operand is
a (possibly cv-qualified) class type or
a reference to (possibly cv-qualified) class type,
that class shall be completely defined.

\pnum
When \keyword{typeid} is applied to a glvalue whose type is a
polymorphic class type\iref{class.virtual}, the result refers to a
Expand Down Expand Up @@ -3676,9 +3682,7 @@
\grammarterm{type-id}. If the type of the \grammarterm{type-id} is a reference
to a possibly cv-qualified type, the result of the
\keyword{typeid} expression refers to a \tcode{std::type_info} object
representing the cv-unqualified referenced type. If the type of
the \grammarterm{type-id} is a class type or a reference to a class type,
the class shall be completely-defined.
representing the cv-unqualified referenced type.
\begin{note}
The \grammarterm{type-id} cannot denote a function type with
a \grammarterm{cv-qualifier-seq} or a \grammarterm{ref-qualifier}\iref{dcl.fct}.
Expand Down