gcc-4.9/gcc/testsuite/g++.dg/expr/cond2.C


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struct Term { };
struct Boolean : Term {
  explicit Boolean(bool);
};
struct IsZero : Term {
  Term *eval();
};
Term*
IsZero::eval()
{
  return true ? new Boolean(false) : this; // { dg-error "conditional expression" }
}