1 // { dg-do compile { target c++11 } }
2 
3 int operator""_t (long long unsigned); // { dg-message "note: candidate"}
4 
5 namespace foo {
6   int operator""_t (long long unsigned);  // { dg-message "note: candidate"}
7 }
8 
9 using namespace foo;
10 int var = 10_t; // { dg-error "call of overloaded | is ambiguous" }
11