Created on 2011-12-20.00:00:00 last changed 101 months ago
Rationale (February, 2012):
This is a request for an extension to the language and is thus more appropriately addressed by EWG.
This seems like it should be well-formed:
template <class T> T list(T x); template <class H, class ...T> auto list(H h, T ...args) -> decltype(list(args...)); auto list3 = list(1, 2, 3);
but it isn't, because the second list isn't in scope in its own trailing-return-type; the point of declaration is after the declarator, which includes the trailing-return-type. And since int has no associated namespaces, the call in the return type only sees the first list. G++, EDG and Clang all reject the testcase on this basis.
But this seems like a natural pattern for writing variadic function templates, and we could support it by moving the point of declaration to the ->. This would mean having to deal with a function that only has a placeholder for a return type, but I think we can handle that.
|2012-02-27 00:00:00||admin||set||messages: + msg3861|
|2012-02-27 00:00:00||admin||set||status: open -> extension|