------- Comment #10 from redi at gcc dot gnu dot org 2010-03-08 14:40 ------- (In reply to comment #8) > Hmm, I wonder what the current draft of C++0x says of decltype with this > respect (right now we reject it). >
In Bug 43285 Comment 1 I said that I think decltype is invalid in this context, which would make this a documentation bug for C++. In the C++0x grammar: simple-type-specifier: ::_opt nested-name-specifier_opt type-name ... decltype ( expression ) nested-name-specifier: type-name :: namespace-name :: nested-name-specifier identifier :: nested-name-specifier template_opt simple-template-id :: type-name: class-name enum-name typedef-name So decltype(expression) cannot appear in a nested-name-specifier -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=6709
