llvm-project/clang/test/Sema/enum-attr.c

// RUN: %clang_cc1 -fsyntax-only -verify -Wassign-enum -Wswitch-enum -Wcovered-switch-default %s

enum Enum {
  A0 = 1, A1 = 10
};

enum __attribute__((enum_extensibility(closed))) EnumClosed {
  B0 = 1, B1 = 10
};

enum __attribute__((enum_extensibility(open))) EnumOpen {
  C0 = 1, C1 = 10
};

enum __attribute__((flag_enum)) EnumFlag {
  D0 = 1, D1 = 8
};

enum __attribute__((flag_enum,enum_extensibility(closed))) EnumFlagClosed {
  E0 = 1, E1 = 8
};

enum __attribute__((flag_enum,enum_extensibility(open))) EnumFlagOpen {
  F0 = 1, F1 = 8
};

enum __attribute__((enum_extensibility(arg1))) EnumInvalidArg { // expected-warning{{'enum_extensibility' attribute argument not supported: 'arg1'}}
  X0
};

// FIXME: The warning should mention that enum_extensibility takes only one argument.
enum __attribute__((enum_extensibility(closed,open))) EnumTooManyArgs { // expected-error{{use of undeclared identifier 'open'}}
  X1
};

enum __attribute__((enum_extensibility())) EnumTooFewArgs { // expected-error{{'enum_extensibility' attribute takes one argument}}
  X2
};

struct __attribute__((enum_extensibility(open))) S { // expected-warning{{'enum_extensibility' attribute only applies to enums}}{
};

void test() {
  enum Enum t0 = 100; // expected-warning{{integer constant not in range of enumerated type}}
  t0 = 1;

  switch (t0) { // expected-warning{{enumeration value 'A1' not handled in switch}}
  case A0: break;
  case 16: break; // expected-warning{{case value not in enumerated type}}
  }

  switch (t0) {
  case A0: break;
  case A1: break;
  default: break; // expected-warning{{default label in switch which covers all enumeration}}
  }

  enum EnumClosed t1 = 100; // expected-warning{{integer constant not in range of enumerated type}}
  t1 = 1;

  switch (t1) { // expected-warning{{enumeration value 'B1' not handled in switch}}
  case B0: break;
  case 16: break; // expected-warning{{case value not in enumerated type}}
  }

  switch (t1) {
  case B0: break;
  case B1: break;
  default: break; // expected-warning{{default label in switch which covers all enumeration}}
  }

  enum EnumOpen t2 = 100;
  t2 = 1;

  switch (t2) { // expected-warning{{enumeration value 'C1' not handled in switch}}
  case C0: break;
  case 16: break;
  }

  switch (t2) {
  case C0: break;
  case C1: break;
  default: break;
  }

  enum EnumFlag t3 = 5; // expected-warning{{integer constant not in range of enumerated type}}
  t3 = 9;

  switch (t3) { // expected-warning{{enumeration value 'D1' not handled in switch}}
  case D0: break;
  case 9: break;
  case 16: break; // expected-warning{{case value not in enumerated type}}
  }

  switch (t3) {
  case D0: break;
  case D1: break;
  default: break;
  }

  enum EnumFlagClosed t4 = 5; // expected-warning{{integer constant not in range of enumerated type}}
  t4 = 9;

  switch (t4) { // expected-warning{{enumeration value 'E1' not handled in switch}}
  case E0: break;
  case 9: break;
  case 16: break; // expected-warning{{case value not in enumerated type}}
  }

  switch (t4) {
  case E0: break;
  case E1: break;
  default: break;
  }

  enum EnumFlagOpen t5 = 5;
  t5 = 9;

  switch (t5) { // expected-warning{{enumeration value 'F1' not handled in switch}}
  case F0: break;
  case 9: break;
  case 16: break;
  }

  switch (t5) {
  case F0: break;
  case F1: break;
  default: break;
  }
}