Cgo's most interesting translation is for functions.  If xxx is a C
function, then cgo rewrites C.xxx into a new function _C_xxx that
calls the C xxx in a standard pthread.  The new function translates
its arguments, calls xxx, and translates the return value.

Translation of parameters and the return value follows the type
translation above except that arrays passed as parameters translate

			// This was an extension in the old C version of 'go tool addr2line'
			// and is probably not used by anyone, but recognize the syntax.
			// We don't have an implementation.
			fmt.Fprintf(stdout, "!reverse translation not implemented\n")
			continue
		}
		pc, _ := strconv.ParseUint(strings.TrimPrefix(p, "0x"), 16, 64)
		file, line, fn := tab.PCToLine(pc)
		name := "?"
		if fn != nil {
			name = fn.Name
		} else {

	// DisableNestedTransaction disable nested transaction
	DisableNestedTransaction bool
	// AllowGlobalUpdate allow global update
	AllowGlobalUpdate bool
	// QueryFields executes the SQL query with all fields of the table
	QueryFields bool
	// CreateBatchSize default create batch size
	CreateBatchSize int
	// TranslateError enabling error translation
	TranslateError bool

	// ClauseBuilders clause builder

		tx3 := DB.Session(&gorm.Session{PrepareStmt: true})
		if err := tx3.Transaction(func(tx4 *gorm.DB) error {
			// nested transaction
			return tx4.Transaction(func(tx5 *gorm.DB) error {
				return tx5.First(&User{}, "name = ?", "transaction-2").Error
			})
		}); err != nil {
			t.Fatalf("prepare statement and nested transcation coexist" + err.Error())
		}
	})
}

func TestCancelTransaction(t *testing.T) {
	ctx := context.Background()

distinguish functions from global variables.) Cgo reads the constant
values from the __cgodebug_* from the object file's data segment.

At this point cgo knows the meaning of each C.xxx well enough to start
the translation process.

Translating Go

Given the input Go files x.go and y.go, cgo generates these source
files:

	x.cgo1.go       # for gc (cmd/compile)
	y.cgo1.go       # for gc
	_cgo_gotypes.go # for gc

		err   error
	}{
		{
			input: `<Transition>
			<Days>0</Days>
			<StorageClass>S3TIER-1</StorageClass>
		  </Transition>`,
			err: nil,
		},
		{
			input: `<Transition>
			<Days>1</Days>
			<Date>2021-01-01T00:00:00Z</Date>
			<StorageClass>S3TIER-1</StorageClass>
		  </Transition>`,
			err: errTransitionInvalid,
		},
		{
			input: `<Transition>
			<Days>1</Days>
		  </Transition>`,

}

// ExpectedExpiryTime calculates the expiry, transition or restore date/time based on a object modtime.
// The expected transition or restore time is always a midnight time following the object
// modification time plus the number of transition/restore days.
//
//	e.g. If the object modtime is `Thu May 21 13:42:50 GMT 2020` and the object should
//	    transition in 1 day, then the expected transition time is `Fri, 23 May 2020 00:00:00 GMT`

		"Invalid value for replication workers",
		"",
		"MINIO_API_REPLICATION_WORKERS: should be > 0",
	)

	ErrInvalidTransitionWorkersValue = newErrFn(
		"Invalid value for transition workers",
		"",
		"MINIO_API_TRANSITION_WORKERS: should be >= GOMAXPROCS/2",
	)
	ErrInvalidBatchKeyRotationWorkersWait = newErrFn(
		"Invalid value for batch key rotation workers wait",
		"Please input a non-negative duration",

	DeleteReplication   ReplicationState    // Represents internal replication state needed for Delete replication
	Transition          TransitionOptions
	Expiration          ExpirationOptions
	LifecycleAuditEvent lcAuditEvent

	WantChecksum *hash.Checksum // x-amz-checksum-XXX checksum sent to PutObject/ CompleteMultipartUpload.

	}

	return evalDisks(disks, errs), err
}

// PutObjectPart - reads incoming stream and internally erasure codes
// them. This call is similar to single put operation but it is part
// of the multipart transaction.
//
// Implements S3 compatible Upload Part API.
func (er erasureObjects) PutObjectPart(ctx context.Context, bucket, object, uploadID string, partID int, r *PutObjReader, opts ObjectOptions) (pi PartInfo, err error) {