3 template < bool, typename >
6 template < typename T >
7 struct enable_if< true, T >
12 template < typename T >
13 struct enable_if< true, T >::type
14 f( T x ); // { dg-error "not a class type" }
19 f< int >( 0 ); // { dg-error "no match" }
22 // { dg-prune-output "note" }