clang/test/SemaCXX/enum-increment.cpp

   1 // RUN: %clang_cc1 -fsyntax-only %s -verify
   2
   3 enum A { A1, A2, A3 };
   4 void test() {
   5   A a;
   6   a++;  // expected-error{{cannot increment expression of enum type 'A'}}
   7   a--;  // expected-error{{cannot decrement expression of enum type 'A'}}
   8   ++a;  // expected-error{{cannot increment expression of enum type 'A'}}
   9   --a;  // expected-error{{cannot decrement expression of enum type 'A'}}
  10 }
  11
  12 enum B {B1, B2};
  13 inline B &operator++ (B &b) { b = B((int)b+1); return b; }
  14 inline B operator++ (B &b, int) { B ret = b; ++b; return b; }
  15
  16 void foo(enum B b) { ++b; b++; }