Re: c++/3033: 'using typename' construct doesn't work

[Gabriel Dos Reis <Gabriel.Dos-Reis@cmla.ens-cachan.fr>]

sethml@ofb.net writes:

| > sethml@ofb.net writes:
| > 
| > | 	C++ allows the word 'typename' after a 'using' directive.  _The C++ Pro
| > gramming Language_ (third edition) [Stroustrup], section A.7 (Grammar/Declara
| > tions) defines the using directive:
| > | 	  using-declaration:
| > | 	      "using" "typename"(opt) "::"(opt) nested-name-specifier 
| > | 	      unqualified-id ";"
| > 
| > The C++ grammar is not context-free, you cannot deduce construct
| > validity just from pure grammar productions.
| 
| OK, fine.  The question remains: is this a legal construct, or not?

The constructs you sent were all ill-formed.  See 14.6/5 of the C++
definition text.

-- Gaby