-// ErrorOr specialization for void.
-template <>
-class ErrorOr<void> {
-public:
- ErrorOr() : Error(0, 0) {}
-
- template <class E>
- ErrorOr(E ErrorCode, typename enable_if_c<is_error_code_enum<E>::value ||
- is_error_condition_enum<E>::value,
- void *> ::type = 0)
- : Error(0, 0) {
- error_code EC = make_error_code(ErrorCode);
- if (EC == errc::success) {
- Error.setInt(1);
- return;
- }
- ErrorHolderBase *EHB = new ErrorHolderBase;
- EHB->Error = EC;
- EHB->HasUserData = false;
- Error.setPointer(EHB);
- }
-
- ErrorOr(llvm::error_code EC) : Error(0, 0) {
- if (EC == errc::success) {
- Error.setInt(1);
- return;
- }
- ErrorHolderBase *E = new ErrorHolderBase;
- E->Error = EC;
- E->HasUserData = false;
- Error.setPointer(E);
- }
-
- template<class UserDataT>
- ErrorOr(UserDataT UD, typename
- enable_if_c<ErrorOrUserDataTraits<UserDataT>::value>::type* = 0)
- : Error(0, 0) {
- ErrorHolderBase *E = new ErrorHolder<UserDataT>(llvm_move(UD));
- E->Error = ErrorOrUserDataTraits<UserDataT>::error();
- E->HasUserData = true;
- Error.setPointer(E);
- }
-
- ErrorOr(const ErrorOr &Other) : Error(0, 0) {
- Error = Other.Error;
- if (Other.Error.getPointer()->Error) {
- Error.getPointer()->acquire();
- }
- }
-
- ErrorOr &operator =(const ErrorOr &Other) {
- if (this == &Other)
- return *this;
-
- this->~ErrorOr();
- new (this) ErrorOr(Other);
-
- return *this;
- }
-
-#if LLVM_HAS_RVALUE_REFERENCES
- ErrorOr(ErrorOr &&Other) : Error(0) {
- // Get other's error.
- Error = Other.Error;
- // Tell other not to do any destruction.
- Other.Error.setPointer(0);
- }
-
- ErrorOr &operator =(ErrorOr &&Other) {
- if (this == &Other)
- return *this;
-
- this->~ErrorOr();
- new (this) ErrorOr(std::move(Other));
-
- return *this;
- }
-#endif
-
- ~ErrorOr() {
- if (Error.getPointer())
- Error.getPointer()->release();
- }
-
- template<class ET>
- ET getError() const {
- assert(ErrorOrUserDataTraits<ET>::error() == *this &&
- "Incorrect user error data type for error!");
- if (!Error.getPointer()->HasUserData)
- return ET();
- return reinterpret_cast<const ErrorHolder<ET> *>(
- Error.getPointer())->UserData;
- }
-
- typedef void (*unspecified_bool_type)();
- static void unspecified_bool_true() {}
-
- /// \brief Return false if there is an error.
- operator unspecified_bool_type() const {
- return Error.getInt() ? unspecified_bool_true : 0;
- }
-
- operator llvm::error_code() const {
- return Error.getInt() ? make_error_code(errc::success)
- : Error.getPointer()->Error;
- }
-
-private:
- // If the bit is 1, the error is success.
- llvm::PointerIntPair<ErrorHolderBase *, 1> Error;
-};
-