This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 115f. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.
2024-12-06
[Accepted as a DR at the February, 2023 meeting.]
According to 6.4.2 [basic.scope.pdecl] paragraph 3,
The locus of an enum-specifier or opaque-enum-declaration is immediately after the identifier (if any) in it (9.7.1 [dcl.enum]).
Equivalent wording has been present for a very long time; see, for instance, issue 1482. However, most or all implementations reject the example from that issue:
template<typename T> struct S { typedef char I; }; enum E: S<E>::I { e }; // Implementations say E is undeclared in S<E>
In addition to recognizing current implementation practice, it would be practically useful if the locus were specified instead as after the enum-head or complete opaque-enum-declaration, as it would allow use of SFINAE in std::is_scoped_enum to distinguish between scoped and unscoped enumerations rather than requiring special compiler support.
CWG 2022-11-11
Move the locus to immediately after the enum-head.
Proposed resolution (approved by CWG 2023-02-06):
The locus of an enum-specifieror opaque-enum-declarationis immediately afterthe identifier (if any) in itits enum-head; the locus of an opaque-enum-declaration is immediately after it (9.7.1 [dcl.enum]).