9 #ifndef LLVM_ADT_BITMASKENUM_H
10 #define LLVM_ADT_BITMASKENUM_H
13 #include <type_traits>
41 #define LLVM_MARK_AS_BITMASK_ENUM(LargestValue) \
42 LLVM_BITMASK_LARGEST_ENUMERATOR = LargestValue
55 #define LLVM_ENABLE_BITMASK_ENUMS_IN_NAMESPACE() \
56 using ::llvm::BitmaskEnumDetail::operator~; \
57 using ::llvm::BitmaskEnumDetail::operator|; \
58 using ::llvm::BitmaskEnumDetail::operator&; \
59 using ::llvm::BitmaskEnumDetail::operator^; \
60 using ::llvm::BitmaskEnumDetail::operator|=; \
61 using ::llvm::BitmaskEnumDetail::operator&=; \
63 using ::llvm::BitmaskEnumDetail::operator^=
69 template <
typename E,
typename Enable =
void>
74 E,
std::enable_if_t<sizeof(E::LLVM_BITMASK_LARGEST_ENUMERATOR) >= 0>>
76 namespace BitmaskEnumDetail {
80 template <
typename E> constexpr std::underlying_type_t<E>
Mask() {
83 return NextPowerOf2(
static_cast<std::underlying_type_t<E>
>(
84 E::LLVM_BITMASK_LARGEST_ENUMERATOR)) -
90 template <
typename E> constexpr std::underlying_type_t<E>
Underlying(
E Val) {
91 auto U =
static_cast<std::underlying_type_t<E>
>(Val);
92 assert(U >= 0 &&
"Negative enum values are not allowed.");
93 assert(U <= Mask<E>() &&
"Enum value too large (or largest val too small?)");
101 template <typename E, typename = std::enable_if_t<is_bitmask_enum<E>::value>>
103 return static_cast<E>(~
Underlying(Val) & Mask<E>());
106 template <typename E, typename = std::enable_if_t<is_bitmask_enum<E>::value>>
111 template <typename E, typename = std::enable_if_t<is_bitmask_enum<E>::value>>
116 template <typename E, typename = std::enable_if_t<is_bitmask_enum<E>::value>>
124 template <typename E, typename = std::enable_if_t<is_bitmask_enum<E>::value>>
130 template <typename E, typename = std::enable_if_t<is_bitmask_enum<E>::value>>
136 template <typename E, typename = std::enable_if_t<is_bitmask_enum<E>::value>>
146 template <typename E, typename = std::enable_if_t<is_bitmask_enum<E>::value>>
148 static_cast<std::underlying_type_t<E>
>(
149 E::LLVM_BITMASK_LARGEST_ENUMERATOR)});