This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 117b. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.
2025-08-11
1686. Which variables are “explicitly declared const?”Section: 6.7 [basic.link] Status: CD4 Submitter: Daniel Krügler Date: 2013-05-17[Moved to DR at the November, 2014 meeting.]
According to 6.7 [basic.link] paragraph 3,
A name having namespace scope (6.4.6 [basic.scope.namespace]) has internal linkage if it is the name of
...
a non-volatile variable that is explicitly declared const or constexpr and neither explicitly declared extern nor previously declared to have external linkage; or
...
It would be more precise and less confusing if the phrase “explicitly declared const” were replaced by saying that its type is const-qualified. This change would also allow removal of the reference to constexpr, which was added by issue 1112 because constexpr variables are implicitly const-qualified but not covered by the “explicitly declared” phrasing.
Proposed resolution (September, 2013):
Change the second bullet of 6.7 [basic.link] paragraph 3 as follows:
a non-volatile variable that is explicitly declared const or constexpr and of non-volatile const-qualified type that is neither explicitly declared extern nor previously declared to have external linkage; or
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