[Bug c++/15179] Error message can be improved

[redi at gcc dot gnu dot org]

------- Additional Comments From redi at gcc dot gnu dot org  2004-08-05 11:24 -------
It doesn't need to involve nested classes either:
-----------------------------
template <bool>
struct A {
    typedef int type;
};

template <bool yn>
struct B {
    typedef A<yn>::type Type;
};
-----------------------------
3.4 and mainline give:
bug.cc:8: error: type `A<<anonymous> >' is not derived from type `B<yn>'
bug.cc:8: error: ISO C++ forbids declaration of `type' with no type
bug.cc:8: error: expected `;' before "Type"

Again, the problem is a missing "typename" but you can't guess that from the
diagnostic. Compiling the same code with GCC 3.3 gives the "implicit typename
is deprecated" warning which makes the error much easier to find, therefore I
consider this a regression against 3.3


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15179