test/API/lang/cpp/enum_promotion/main.cpp

enum EnumUChar { UChar = 1 } e1;
enum EnumUShort { UShort = 0x101 } e2;
enum EnumUInt { UInt = 0x10001 } e3;
enum EnumSLong { SLong = 0x100000001 } e4;
enum EnumULong { ULong = 0xFFFFFFFFFFFFFFF0 } e5;
enum EnumNChar { NChar = -1 } e6;
enum EnumNShort { NShort = -0x101 } e7;
enum EnumNInt { NInt = -0x10001 } e8;
enum EnumNLong { NLong = -0x100000001 } e9;

int main() {
  auto UChar_promoted = +EnumUChar::UChar;
  auto UShort_promoted = +EnumUShort::UShort;
  auto UInt_promoted = +EnumUInt::UInt;
  auto SLong_promoted = +EnumSLong::SLong;
  auto ULong_promoted = +EnumULong::ULong;
  auto NChar_promoted = +EnumNChar::NChar;
  auto NShort_promoted = +EnumNShort::NShort;
  auto NInt_promoted = +EnumNInt::NInt;
  auto NLong_promoted = +EnumNLong::NLong;
  return 0; // break here
}