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    CWG Issue 1975</TITLE>
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<P><EM>This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21
  Core Issues List revision 118b.
  See http://www.open-std.org/jtc1/sc22/wg21/ for the official
  list.</EM></P>
<P>2025-09-28</P>
<HR>
<A NAME="1975"></A><H4>1975.
  
Permissible declarations for <I>exception-specification</I>s
</H4>
<B>Section: </B>14.5&#160; [<A href="https://wg21.link/except.spec">except.spec</A>]
 &#160;&#160;&#160;

 <B>Status: </B>CD4
 &#160;&#160;&#160;

 <B>Submitter: </B>Richard Smith
 &#160;&#160;&#160;

 <B>Date: </B>2014-07-18<BR>


<P>[Moved to DR at the October, 2015 meeting.]</P>



<P>The declarations in which an <I>exception-specification</I> may
appear is not completely clear from the current wording of
14.5 [<A href="https://wg21.link/except.spec#2">except.spec</A>] paragraph 2.</P>

<P><U>Suggested resolution:</U></P>

<P>Change 14.5 [<A href="https://wg21.link/except.spec#2">except.spec</A>] paragraph 2 as follows:</P>

<BLOCKQUOTE>

An <I>exception-specification</I> shall appear only on a
function declarator for a function type, pointer to function
type, reference to function type, or pointer to member
function type that is the top-level type of a
declaration <DEL>or definition</DEL> <INS>of a function,
variable, or non-static data member</INS>, or on such a type
appearing as a parameter or return type in <INS>such</INS> a
function declarator. <DEL>An <I>exception-specification</I> shall
not appear in a typedef declaration
or <I>alias-declaration</I>.</DEL>  [<I>Example:</I>...

</BLOCKQUOTE>

<P>See also issues <A HREF="2010.html">2010</A>,
<A HREF="1995.html">1995</A>,
<A HREF="1946.html">1946</A>,
and <A HREF="1798.html">1798</A>.</P>

<P><B>Proposed resolution (May, 2015):</B></P>

<P>Change 14.5 [<A href="https://wg21.link/except.spec#2">except.spec</A>] paragraph 2 as follows:</P>

<BLOCKQUOTE>

An <I>exception-specification</I> shall appear only <DEL>on</DEL>
<INS>within a <I>lambda-declarator</I> or within</INS> a
function declarator for a function type, pointer to function
type, reference to function type, or pointer to member
function type that is the top-level type of a
declaration <DEL>or definition, or on such a type appearing
as a parameter or return type in a function declarator.
An <I>exception-specification</I> shall not appear in a
typedef declaration or <I>alias-declaration</I>.</DEL>
<INS>of a function, variable, or non-static data member.  It
shall appear only on the top-level declarator, on
the <I>declarator</I> of one of its
<I>parameter-declaration</I>s (if any), or on its return
type</INS>. [<I>Example:</I>...

</BLOCKQUOTE>

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