for _, pf := range tx.Statement.Schema.PrimaryFields {
				if _, isZero := pf.ValueOf(tx.Statement.Context, reflectValue); isZero {
					return tx.callbacks.Create().Execute(tx)
				}
			}
		}

		fallthrough
	default:
		selectedUpdate := len(tx.Statement.Selects) != 0
		// when updating, use all fields including those zero-value fields
		if !selectedUpdate {
			tx.Statement.Selects = append(tx.Statement.Selects, "*")

	// Get canonical headers.
	var buf bytes.Buffer
	for _, k := range headers {
		buf.WriteString(k)
		buf.WriteByte(':')
		switch k {
		case "host":
			buf.WriteString(req.URL.Host)
			fallthrough
		default:
			for idx, v := range headerMap[k] {
				if idx > 0 {
					buf.WriteByte(',')
				}
				buf.WriteString(v)
			}
			buf.WriteByte('\n')
		}
	}
	canonicalHeaders := buf.String()

			// intervals that fall within the spl interval above; they
			// appear earlier in this array of intervals, see
			// ObjectsHistogramIntervals
			splCount += count
			fallthrough
		default:
			res[szInt.name] = count
		}
	}
	return res
}

// add a version count to the histogram.
func (h *versionsHistogram) add(versions uint64) {

				p.errorf("invalid vtype: %v", err)
			}
			prog.AddRestSourceArgs([]obj.Addr{a[1], a[2], a[3], a[4]})
			prog.To = a[5]
			break
		}
		fallthrough
	default:
		p.errorf("can't handle %s instruction with %d operands", op, len(a))
		return
	}

	p.append(prog, cond, true)
}

</p>

<h3 id="Fallthrough_statements">Fallthrough statements</h3>

<p>
A "fallthrough" statement transfers control to the first statement of the
next case clause in an <a href="#Expression_switches">expression "switch" statement</a>.
It may be used only as the final non-empty statement in such a clause.
</p>

<pre class="ebnf">
FallthroughStmt = "fallthrough" .
</pre>

	if p == nil {
		return
	}
	var ch chan<- ReplicationWorkerOperation
	switch doi.OpType {
	case replication.HealReplicationType, replication.ExistingObjectReplicationType:
		fallthrough
	default:
		ch = p.getWorkerCh(doi.Bucket, doi.ObjectName, 0)
	}

	select {
	case <-p.ctx.Done():
	case ch <- doi:
	default:
		p.queueMRFSave(doi.ToMRFEntry())
		p.mu.RLock()

The last instruction in a <code>TEXT</code> block must be some sort of jump, usually a <code>RET</code> (pseudo-)instruction.
(If it's not, the linker will append a jump-to-itself instruction; there is no fallthrough in <code>TEXTs</code>.)
After the symbol, the arguments are flags (see below)
and the frame size, a constant (but see below):
</p>

<pre>
TEXT runtime·profileloop(SB),NOSPLIT,$8

	r := rand.New(rand.NewSource(99))
	for i := range x {
		switch r.Intn(10) {
		case 0:
			x[i] = ' '
		case 1:
			if i > 0 && x[i-1] == 'x' {
				copy(x[i-1:], "χ")
				break
			}
			fallthrough
		default:
			x[i] = 'x'
		}
	}
	return x
}

var makeFieldsInputASCII = func() []byte {
	x := make([]byte, 1<<20)
	// Input is ~10% space, rest ASCII non-space.

xk[44:51] and cipher LXVD2X (R9+R5), V1 LXVD2X (R10+R5), V2 BEQ CR2, Ldec_tail // Key size 12? VCIPHER V0, V1, V0 VCIPHER V0, V2, V0 // Load xk[52:59] and cipher LXVD2X (R11+R5), V1 LXVD2X (R12+R5), V2 BNE CR3, Linvalid_key_len // Not key size 14? // Fallthrough to final cipher Ldec_tail: // Cipher last two keys such that key information is // cleared from V1 and V2. VCIPHER V0, V1, V1 VCIPHERLAST V1, V2, V2 // Store the result in BE order. P8_STXVB16X(V2, R3, R0) RET Linvalid_key_len: // Segfault, this...

pkg go/token, const DEFER Token
pkg go/token, const DEFINE Token
pkg go/token, const ELLIPSIS Token
pkg go/token, const ELSE Token
pkg go/token, const EOF Token
pkg go/token, const EQL Token
pkg go/token, const FALLTHROUGH Token
pkg go/token, const FLOAT Token
pkg go/token, const FOR Token
pkg go/token, const FUNC Token
pkg go/token, const GEQ Token
pkg go/token, const GO Token
pkg go/token, const GOTO Token