https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98231
Bug ID: 98231
Summary: [11 Regression] bogus error: no match for ‘operator<<’
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: mpolacek at gcc dot gnu.org
Target Milestone: ---
template <typename, typename = int> struct basic_ostream {};
namespace N {
template <typename Char, typename CharTraits, typename T>
void operator<<(basic_ostream<Char, CharTraits>, T);
}
basic_ostream<char> os;
template<typename T> void
foo (T value)
{
using N::operator<<;
os << value;
}
void bar() { foo (1); }
gives
$ ./cc1plus -quiet ceph.C
ceph.C: In instantiation of ‘void foo(T) [with T = int]’:
ceph.C:14:20: required from here
ceph.C:12:6: error: no match for ‘operator<<’ (operand types are
‘basic_ostream<char>’ and ‘int’)
12 | os << value;
| ~~~^~~~~~~~
Started with r11-4690.
