gcc-4.9/gcc/testsuite/g++.dg/cpp1y/digit-sep-cxx11-neg.C


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// { dg-do compile { target { ! c++1y } } }

#define assert(E) if(!(E))__builtin_abort();

#define m(x) 0

int
main()
{
  int i = m(1'2)+(3'4);
  assert(i == 0);
}