This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 114a. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.
2024-04-18
Given that the type-id in an alias-declaration is unambiguously a type, is there a reason to require the typename keyword for dependent types appearing there? In other contexts where a dependent name can only be a type (e.g., in a base-specifier), the keyword can/must be omitted.
Rationale (October, 2012):
CWG felt that having a simple rule (advising use of typename with all dependent nested types wherever syntactically permitted) was more important than reducing the number of contexts in which the requirement applied.