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[temp.explicit] Fix unclear reference to elaborated-type-specifier #3872

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[temp.explicit] Fix unclear reference to elaborated-type-specifier #3872

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40 changes: 25 additions & 15 deletions source/templates.tex
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Original file line number Diff line number Diff line change
Expand Up @@ -127,13 +127,29 @@
\end{note}

\pnum
In a
\grammarterm{template-declaration},
explicit specialization, or explicit instantiation the
\grammarterm{init-declarator-list}
in the declaration shall contain at most one declarator.
When such a declaration is used to declare a class template,
no declarator is permitted.
A \grammarterm{template-declaration} or \grammarterm{explicit-specialization}
declares a class or a class template if its \grammarterm{declaration} contains no
\grammarterm{declarator} and it does not declare an alias template\iref{temp.alias} or
deduction guide\iref{temp.deduct.guide}; the \grammarterm{decl-specifier-seq} of such a
declaration shall contain a single \grammarterm{defining-type-specifier} that is either
a \grammarterm{class-specifier}, \grammarterm{enum-specifier}, or an \grammarterm{elaborated-type-specifier}.
An \grammarterm{explicit-instantiation} that contains no \grammarterm{declarator}
is an explicit instantiation of a class; such a declaration shall contain an
\grammarterm{elaborated-type-specifier}, itself containing a \grammarterm{simple-template-id}.

\pnum
A \grammarterm{template-declaration} or \grammarterm{explicit-specialization}
shall contain a single \grammarterm{declarator} if it does not declare a class,
class template, concept\iref{temp.concept}, alias template\iref{temp.alias} or
deduction guide\iref{temp.deduct.guide}. Similarly, an \grammarterm{explicit-instantiation}
that does not explicitly instantiate a class shall contain a single \grammarterm{declarator}.

\pnum
A \grammarterm{template-declaration} or \grammarterm{explicit-specialization} containing
a \grammarterm{declarator} that does not declare a variable or variable template declares
a function or function template. Similarly, an \grammarterm{explicit-instantiation} containing
a \grammarterm{declarator} that does not explicitly instantiate a variable is an explicit
instantiation of a function.

\pnum
\indextext{template name!linkage of}%
Expand Down Expand Up @@ -6561,7 +6577,8 @@
\pnum
An explicit instantiation shall not use
a \grammarterm{storage-class-specifier}\iref{dcl.stc}
other than \keyword{thread_local}.
other than \keyword{thread_local}. The \grammarterm{init-declarator}
of an explicit instantiation (if any) shall not contain an \grammarterm{initializer}.
An explicit instantiation of a
function template,
member function of a class template, or
Expand All @@ -6572,13 +6589,6 @@
shall appertain to an explicit instantiation.

\pnum
If the explicit instantiation is for a class or member class, the
\grammarterm{elaborated-type-specifier} in the \grammarterm{declaration}
shall include a \grammarterm{simple-template-id};
otherwise, the \grammarterm{declaration}
shall be a \grammarterm{simple-declaration} whose \grammarterm{init-declarator-list}
comprises a single \grammarterm{init-declarator}
that does not have an \grammarterm{initializer}.
If the explicit instantiation is for
a function or member function,
the
Expand Down