gcc/testsuite/g++.dg/cpp0x/udlit-nofunc-neg.C

// { dg-do compile { target c++11 } }

// Test user-defined literals.
// Test error on non-function declaration.

double operator"" _baddecl; // { dg-error "as non-function" }

template<char...>
  int operator"" _badtmpldecl; // { dg-error "as non-function" }