[Bug c++/28048] [4.0/4.1/4.2 Regression] ICE on accessing member of dependent name

[gcc dot gnu dot org at chosenones dot dyndns dot org]

------- Comment #2 from gcc dot gnu dot org at chosenones dot dyndns dot org  2006-06-16 12:59 -------
I'm not entirely sure myself, but:

Section 14.6.7
"When looking for the declaration of a name used in a template function
definition or static data member template definition, the usual lookup rules
_basic.lookup.unqual_, _basic.lookup.koenig_) are used for non-dependent names.
 The lookup of names dependent on the template  arguments  is  postponed  until
 the  actual  template  argument  is known (_temp.dep_)."

Section 14.6.2.3.1 seems to make this a value-dependent expression:
"1 Except as described below, a constant expression is value-dependent if
  any subexpression is value-dependent."

Section 14.6.2.4
"An integral non-type template argument is dependent  if  the  constant
expression it specifies is value-dependent."


So, it seems to be a dependent name, and in other contexts, the lookup of
dependent names is delayed. Also, existing practice and common sense seem to
suggest that this be default. In any case, an ICE is probably not what should
happen.

Comeau C/C++ 4.3.3: Compiles
MSVC 7.1: Compiles

That expression as
-- A static member initializer: Compiles
-- A default function argument: Compiles

A nested type expression of the same form as
-- A base class: Compiles
-- A nested type specifier [typedef]: Compiles
-- Function return type or argument type: Compiles


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28048