The [RuneLen] function returns the number of 16-bit words in
the UTF-16 encoding of the rune. It returns -1 if the rune

			p.errorf("cannot reference %s without a symbol", name)
		}
		p.setPseudoRegister(a, name, false, prefix)
		return
	}
	a.Reg = r1
	if r2 != 0 {
		// TODO: Consistency in the encoding would be nice here.
		if p.arch.InFamily(sys.ARM, sys.ARM64) {
			// Special form
			// ARM: destination register pair (R1, R2).
			// ARM64: register pair (R1, R2) for LDP/STP.
			if prefix != 0 || scale != 0 {

pkg database/sql/driver, var ErrRemoveArgument error
pkg encoding/asn1, const TagNull = 5
pkg encoding/asn1, const TagNull ideal-int
pkg encoding/asn1, var NullBytes []uint8
pkg encoding/asn1, var NullRawValue RawValue
pkg encoding/base32, const NoPadding = -1
pkg encoding/base32, const NoPadding int32
pkg encoding/base32, const StdPadding = 61
pkg encoding/base32, const StdPadding int32
pkg encoding/base32, method (Encoding) WithPadding(int32) *Encoding

pkg debug/pe, type Section struct, Relocs []Reloc
pkg debug/pe, type StringTable []uint8
pkg encoding/base64, method (Encoding) Strict() *Encoding
pkg encoding/json, method (RawMessage) MarshalJSON() ([]uint8, error)
pkg encoding/json, type UnmarshalTypeError struct, Field string
pkg encoding/json, type UnmarshalTypeError struct, Struct string
pkg expvar, func Handler() http.Handler

the (possibly multi-byte) UTF-8 encoding of individual <i>characters</i>.
Thus inside a string literal <code>\377</code> and <code>\xFF</code> represent
a single byte of value <code>0xFF</code>=255, while <code>ÿ</code>,
<code>\u00FF</code>, <code>\U000000FF</code> and <code>\xc3\xbf</code> represent
the two bytes <code>0xc3</code> <code>0xbf</code> of the UTF-8 encoding of character
U+00FF.
</p>

<pre class="ebnf">

pkg encoding/binary, const MaxVarintLen16 = 3
pkg encoding/binary, const MaxVarintLen32 = 5
pkg encoding/binary, const MaxVarintLen64 = 10
pkg encoding/csv, method (*Writer) Error() error
pkg encoding/json, method (*Decoder) Buffered() io.Reader
pkg encoding/json, method (*Decoder) UseNumber()
pkg encoding/json, method (Number) Float64() (float64, error)
pkg encoding/json, method (Number) Int64() (int64, error)

func CutPrefix(s, prefix []byte) (after []byte, found bool) {
	if !HasPrefix(s, prefix) {
		return s, false
	}
	return s[len(prefix):], true
}

// CutSuffix returns s without the provided ending suffix byte slice
// and reports whether it found the suffix.
// If s doesn't end with suffix, CutSuffix returns s, false.
// If suffix is the empty byte slice, CutSuffix returns s, true.
//

// equivalent to that from a range loop over the input as a string, which
// means that erroneous UTF-8 encodings translate to U+FFFD = "\xef\xbf\xbd".
// Because of the Scan interface, this makes it impossible for the client to
// distinguish correctly encoded replacement runes from encoding errors.
func ScanRunes(data []byte, atEOF bool) (advance int, token []byte, err error) {
	if atEOF && len(data) == 0 {

		f.NonUTF8 = false
	default:
		// Might be UTF-8, might be some other encoding; preserve existing flag.
		// Some ZIP writers use UTF-8 encoding without setting the UTF-8 flag.
		// Since it is impossible to always distinguish valid UTF-8 from some
		// other encoding (e.g., GBK or Shift-JIS), we trust the flag.
		f.NonUTF8 = f.Flags&0x800 == 0
	}

//	AccessTime        |    n/a | unlimited |     int89
//	ChangeTime        |    n/a | unlimited |     int89
//	Devmajor/Devminor | uint21 |    uint21 |    uint57
//	------------------+--------+-----------+----------
//	string encoding   |  ASCII |     UTF-8 |    binary
//	sub-second times  |     no |       yes |        no
//	sparse files      |     no |       yes |       yes
//
// The table's upper portion shows the [Header] fields, where each format reports