return
	}
	for _, u := range x {
		encodeUint64(b, tag, u)
	}
}

func encodeUint64Opt(b *buffer, tag int, x uint64) {
	if x == 0 {
		return
	}
	encodeUint64(b, tag, x)
}

func encodeInt64(b *buffer, tag int, x int64) {
	u := uint64(x)
	encodeUint64(b, tag, u)
}

func encodeInt64Opt(b *buffer, tag int, x int64) {
	if x == 0 {
		return
	}
	encodeInt64(b, tag, x)
}

		copy(b.tmp[:], b.data[n2:n3])
		copy(b.data[n1+(n3-n2):], b.data[n1:n2])
		copy(b.data[n1:], b.tmp[:n3-n2])
		return
	}
	for _, u := range x {
		encodeUint64(b, tag, u)
	}
}

func encodeUint64Opt(b *buffer, tag int, x uint64) {
	if x == 0 {
		return
	}
	encodeUint64(b, tag, x)
}

func encodeInt64(b *buffer, tag int, x int64) {
	u := uint64(x)
	encodeUint64(b, tag, u)
}