gcc/testsuite/g++.dg/cpp0x/enum29.C

   1 // PR c++/51312
   2 // { dg-do compile { target c++11 } }
   3
   4 struct X0
   5 {
   6   constexpr operator int() const { return 1; }
   7 };
   8
   9 struct X1
  10 {
  11   enum RE1 { re1 = 1 };
  12   constexpr operator RE1() const { return re1; }
  13 };
  14
  15 struct X2
  16 {
  17   constexpr operator int() const { return __INT_MAX__; }
  18 };
  19
  20 struct X3
  21 {
  22   enum RE3 { re3 = __INT_MAX__ };
  23   constexpr operator RE3() const { return re3; }
  24 };
  25
  26 struct X4
  27 {
  28   constexpr operator double() const { return 1.0; }
  29 };
  30
  31 struct X5
  32 {
  33   constexpr operator int() const { return __INT_MAX__; }
  34   constexpr operator unsigned() const { return __INT_MAX__ * 2U + 1; }
  35 };
  36
  37 enum E0 { e0 = X0() };
  38 enum E1 { e1 = X1() };
  39 enum E2 { e2 = X2() };
  40 enum E3 { e3 = X3() };
  41 enum E4 { e4 = X4() };  // { dg-error "integer constant" }
  42 enum E5 { e5 = X5() };  // { dg-error "ambiguous" }
  43
  44 enum F0 : int { f0 = X0() };
  45 enum F1 : int { f1 = X1() };
  46 enum F2 : int { f2 = X2() };
  47 enum F3 : int { f3 = X3() };
  48 enum F4 : int { f4 = X4() };  // { dg-error "narrowing" }
  49 enum F5 : int { f5 = X5() };
  50
  51 enum G0 : signed char { g0 = X0() };
  52 enum G1 : signed char { g1 = X1() };
  53 enum G2 : signed char { g2 = X2() };  // { dg-error "narrowing" }
  54 enum G3 : signed char { g3 = X3() };  // { dg-error "narrowing" }
  55 enum G4 : signed char { g4 = X4() };  // { dg-error "narrowing" }
  56 enum G5 : signed char { g5 = X5() };  // { dg-error "ambiguous" }