c++/4933: [2003-01-13]tree_list not supported by dump_expr

[Giovanni Bajo]

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&p
r=4933

Redux:
--------------------------------------------
template<unsigned F>
struct Foo;

template<typename T>
T makeT();

template<typename T,typename U>
struct Bar
{
    typedef Foo
    <
        sizeof((makeT<T>(), makeT<U>()))
    > Type;
};
----------------------------------------------
pr4933.cpp:14: sorry, unimplemented: `tree_list' not supported by dump_expr
pr4933.cpp:14: sorry, unimplemented: `tree_list' not supported by dump_expr


It's now easy to see that GCC simply doesn't like the comma operator in that
context.

Confirmed with 2.95, 3.2 and 3.3 20030401.

Giovanni Bajo