// into d.comp are unique.
		for j := 0; j < i; j++ {
			if scan[i].compIndex == scan[j].compIndex {
				return FormatError("repeated component selector")
			}
		}
		totalHV += d.comp[compIndex].h * d.comp[compIndex].v

		// The baseline t <= 1 restriction is specified in table B.3.
		scan[i].td = d.tmp[2+2*i] >> 4
		if t := scan[i].td; t > maxTh || (d.baseline && t > 1) {
			return FormatError("bad Td value")
		}

		field.NewValuePool.Put(values[idx])
	}
}

// ScanMode scan data mode
type ScanMode uint8

// scan modes
const (
	ScanInitialized         ScanMode = 1 << 0 // 1
	ScanUpdate              ScanMode = 1 << 1 // 2
	ScanOnConflictDoNothing ScanMode = 1 << 2 // 4
)

// Scan scan rows into db statement
func Scan(rows Rows, db *DB, mode ScanMode) {
	var (
		columns, _          = rows.Columns()

}

// Scanner is implemented by any value that has a Scan method, which scans
// the input for the representation of a value and stores the result in the
// receiver, which must be a pointer to be useful. The Scan method is called
// for any argument to [Scan], [Scanf], or [Scanln] that implements it.
type Scanner interface {
	Scan(state ScanState, verb rune) error
}

// Scan scans text read from standard input, storing successive

    <a class="badge" href="https://dpeuniversity.gradle.com/app/courses/b5069222-cfd0-4393-b645-7a2c713853d5/" target="_blank">
        <span class="badge-type button--blue">LEARN</span>
        <span class="badge-text">How to Use Build Scans&nbsp;&nbsp;&nbsp;&gt;</span>
    </a>
</div>
++++

A build scan is a *representation of metadata captured* as you run your build.

image::gradle-basic-1.png[]

== Build Scans

			// conservative scanning, we have to scan it
			// defensively, too.
			state.putPtr(val, true)
			continue
		}

		// Check if val points to a heap span.
		span := spanOfHeap(val)
		if span == nil {
			continue
		}

		// Check if val points to an allocated object.
		idx := span.objIndex(val)
		if span.isFree(idx) {
			continue
		}

In Gradle 4.3 and above, you can create a build scan using the `--scan` command line option:

[listing.terminal]
----
$ gradle build --scan
----

For older Gradle versions, the
https://docs.gradle.com/build-scan-plugin/#getting_set_up[Build Scan Plugin User Manual]
explains how to enable build scans.

At the end of your build, Gradle displays a URL where you can find your build scan:

----
BUILD SUCCESSFUL in 2s

cui fliter <******@****.***> 1711121504 +0800

	if span.list != list {
		print("runtime: failed mSpanList.remove span.npages=", span.npages,
			" span=", span, " prev=", span.prev, " span.list=", span.list, " list=", list, "\n")
		throw("mSpanList.remove")
	}
	if list.first == span {
		list.first = span.next
	} else {
		span.prev.next = span.next
	}
	if list.last == span {
		list.last = span.prev
	} else {
		span.next.prev = span.prev

			panic("bad 32->16 conversion")
		}
		y = append(y, uint16(v))
	}
	return y
}

func main() {
	flag.Parse()

	rang, except := scan(0, 0xFFFF)
	range16 = to16(rang)
	except16 = to16(except)
	range32, except32 = scan(0x10000, unicode.MaxRune)

	for i := rune(0); i <= unicode.MaxRune; i++ {
		if isPrint(i) != unicode.IsPrint(i) {

	const batchSize = 64 // ~1–2 µs per span.
	lock(&work.wbufSpans.lock)
	if gcphase != _GCoff || work.wbufSpans.free.isEmpty() {
		unlock(&work.wbufSpans.lock)
		return false
	}
	systemstack(func() {
		gp := getg().m.curg
		for i := 0; i < batchSize && !(preemptible && gp.preempt); i++ {
			span := work.wbufSpans.free.first
			if span == nil {
				break
			}
			work.wbufSpans.free.remove(span)