v.grow(n) // fine to treat as assignable since we allocate a new slice header
	s.Len += n
	return v
}

// Clear clears the contents of a map or zeros the contents of a slice.
//
// It panics if v's Kind is not [Map] or [Slice].
func (v Value) Clear() {
	switch v.Kind() {
	case Slice:
		sh := *(*unsafeheader.Slice)(v.ptr)

		// Atomic stores and exchanges.  Stores use XCHG to get the right memory ordering semantics.
		// store arg0 to arg1+auxint+aux, arg2=mem.
		// These ops return a tuple of <old contents of *(arg1+auxint+aux), memory>.
		// Note: arg0 and arg1 are backwards compared to MOVLstore (to facilitate resultInArg0)!

//		The file is a JSON struct with a single field, named 'Replace', that
//		maps each disk file path (a string) to its backing file path, so that
//		a build will run as if the disk file path exists with the contents
//		given by the backing file paths, or as if the disk file path does not
//		exist if its backing file path is empty. Support for the -overlay flag
//		has some limitations: importantly, cgo files included from outside the

(AtomicExchange(32|64)Variant       ...) => (LoweredAtomicExchange(32|64)Variant ...)
(AtomicCompareAndSwap(32|64)Variant ...) => (LoweredAtomicCas(32|64)Variant      ...)

// Return old contents.
(AtomicAnd(64|32|8)            ...) => (LoweredAtomicAnd(64|32|8)            ...)
(AtomicOr(64|32|8)             ...) => (LoweredAtomicOr(64|32|8)             ...)

func (ab *AsmBuf) Last() byte { return ab.buf[ab.off-1] }

// Len returns the length of the buffer.
func (ab *AsmBuf) Len() int { return ab.off }

// Bytes returns the contents of the buffer.
func (ab *AsmBuf) Bytes() []byte { return ab.buf[:ab.off] }

// Reset empties the buffer.
func (ab *AsmBuf) Reset() { ab.off = 0 }

// At returns the byte at offset i.

	}
	if otherReady {
		goto top
	}

	// Before we drop our P, make a snapshot of the allp slice,
	// which can change underfoot once we no longer block
	// safe-points. We don't need to snapshot the contents because
	// everything up to cap(allp) is immutable.
	allpSnapshot := allp
	// Also snapshot masks. Value changes are OK, but we can't allow
	// len to change out from under us.
	idlepMaskSnapshot := idlepMask

		go func() {
			defer wg.Done()

			contentLen := fmt.Sprintf("Content-Length: %d", test.contentLength)
			if test.chunked {
				contentLen = "Transfer-Encoding: chunked"
			}
			_, err := fmt.Fprintf(conn, "POST /?readbody=%v HTTP/1.1\r\n"+
				"Connection: close\r\n"+
				"%s\r\n"+
				"Expect: %s\r\nHost: foo\r\n\r\n",
				test.readBody, contentLen, test.expectation)
			if err != nil {

	if p.UsesCgo() || p.UsesSwig() {
		if pcCFLAGS, pcLDFLAGS, err = b.getPkgConfigFlags(a); err != nil {
			return
		}
	}

	// Compute overlays for .c/.cc/.h/etc. and if there are any overlays
	// put correct contents of all those files in the objdir, to ensure
	// the correct headers are included. nonGoOverlay is the overlay that
	// points from nongo files to the copied files in objdir.

A string value is a (possibly empty) sequence of bytes.
The number of bytes is called the length of the string and is never negative.
Strings are immutable: once created,
it is impossible to change the contents of a string.
The predeclared string type is <code>string</code>;
it is a <a href="#Type_definitions">defined type</a>.
</p>

<p>
The length of a string <code>s</code> can be discovered using

			t.Fatalf("extension #%d has unexpected type %v (expected %v)", i, extension.Id, expected[i].Id)
		}

		if !bytes.Equal(extension.Value, expected[i].Value) {
			t.Fatalf("extension #%d has unexpected contents %x (expected %x)", i, extension.Value, expected[i].Value)
		}
	}
}

// serialiseAndParse generates a self-signed certificate from template and
// returns a parsed version of it.