// terms separated by +/-
type Operand struct {
	Left  *MultOp     `parser:"@@"`
	Right []*OpFactor `parser:"(@@)*"`
}

// OpFactor represents the right-side of a +/- operation.
type OpFactor struct {
	Op    string  `parser:"@(\"+\" | \"-\")"`
	Right *MultOp `parser:"@@"`
}

// MultOp represents a single term followed by an optional sequence of

	// Create context that also contains information about the object and bucket.
	// The top level handler might not have this information.
	reqInfo := logger.GetReqInfo(ctx)
	var newReqInfo *logger.ReqInfo
	if reqInfo != nil {

		}

		// On windows having a preceding SlashSeparator will cause problems, if the
		// command line already has C:/<export-folder/ in it. Final resulting
		// path on windows might become C:/C:/ this will cause problems
		// of starting minio server properly in distributed mode on windows.
		// As a special case make sure to trim the separator.

	p.diskID.Store(&id)
}

func (p *xlStorageDiskIDCheck) checkDiskStale() error {
	if *p.diskID.Load() == emptyDiskID {
		// For empty disk-id we allow the call as the server might be
		// coming up and trying to read format.json or create format.json
		return nil
	}
	storedDiskID, err := p.storage.GetDiskID()
	if err != nil {
		// return any error generated while reading `format.json`

		}(endpoint)
	}

	wg.Wait()
}

// monitorAndConnectEndpoints this is a monitoring loop to keep track of disconnected
// endpoints by reconnecting them and making sure to place them into right position in
// the set topology, this monitoring happens at a given monitoring interval.
func (s *erasureSets) monitorAndConnectEndpoints(ctx context.Context, monitorInterval time.Duration) {

func ContainsReservedChars(s string) bool {
	return strings.ContainsAny(s, reservedChars)
}

// IsAccessKeyValid - validate access key for right length.
func IsAccessKeyValid(accessKey string) bool {
	return len(accessKey) >= accessKeyMinLen
}

// IsSecretKeyValid - validate secret key for right length.
func IsSecretKeyValid(secretKey string) bool {
	return len(secretKey) >= secretKeyMinLen
}

// Default access and secret keys.

				"us-west-1",
				"s3",
				"ABCD"),
			expectedCredentials: credentialHeader{},
			expectedErrCode:     ErrInvalidRequestVersion,
		},
		// Test Case - 9.
		// Test case with right inputs. Expected to return a valid CredentialHeader.
		// "aws4_request" is the valid request version.
		{
			inputCredentialStr: generateCredentialStr(
				"Z7IXGOO6BZ0REAN1Q26I",
				sampleTimeStr,
				"us-west-1",

			}
			return
		}
		h.ServeHTTP(w, r)
	})
}

// setBucketForwardingMiddleware middleware forwards the path style requests
// on a bucket to the right bucket location, bucket to IP configuration
// is obtained from centralized etcd configuration service.
func setBucketForwardingMiddleware(h http.Handler) http.Handler {

| `minio_s3_requests_incoming_total`            | Volatile number of total incoming S3 requests.           |
| `minio_s3_requests_inflight_total`            | Total number of S3 requests currently in flight.         |
| `minio_s3_requests_rejected_auth_total`       | Total number S3 requests rejected for auth failure.      |
| `minio_s3_requests_rejected_header_total`     | Total number S3 requests rejected for invalid header.    |

			return written, err
		}

		if nw != int64(len(buf)) {
			return written, io.ErrShortWrite
		}

		if totalSize > 0 && written == totalSize {
			// we have written the entire stream, return right here.
			return written, nil
		}

		if eof {
			// We reached EOF prematurely but we did not write everything
			// that we promised that we would write.
			if totalSize > 0 && written != totalSize {