if b.Flush(); b.err != nil {
			return 0, b.err
		}
		n = b.Available()
		if n < utf8.UTFMax {
			// Can only happen if buffer is silly small.
			return b.WriteString(string(r))
		}
	}
	size = utf8.EncodeRune(b.buf[b.n:], r)
	b.n += size
	return size, nil
}

// WriteString writes a string.
// It returns the number of bytes written.
// If the count is less than len(s), it also returns an error explaining

			}
		}
		buf[n-1] = '\x00'
	}
}

func bmIndexRune(index func([]byte, rune) int) func(b *testing.B, n int) {
	return func(b *testing.B, n int) {
		buf := bmbuf[0:n]
		utf8.EncodeRune(buf[n-3:], '世')
		for i := 0; i < b.N; i++ {
			j := index(buf, '世')
			if j != n-3 {
				b.Fatal("bad index", j)
			}
		}
		buf[n-3] = '\x00'
		buf[n-2] = '\x00'
		buf[n-1] = '\x00'
	}
}

integer-to-string conversions as potential errors.
Library functions such as
<a href="/pkg/unicode/utf8#AppendRune"><code>utf8.AppendRune</code></a> or
<a href="/pkg/unicode/utf8#EncodeRune"><code>utf8.EncodeRune</code></a>
should be used instead.
</li>
</ol>

<h4 id="Conversions_from_slice_to_array_or_array_pointer">Conversions from slice to array or array pointer</h4>

<p>

		{"DecodeRune", Func, 0},
		{"Encode", Func, 0},
		{"EncodeRune", Func, 0},
		{"IsSurrogate", Func, 0},
	},
	"unicode/utf8": {
		{"AppendRune", Func, 18},
		{"DecodeLastRune", Func, 0},
		{"DecodeLastRuneInString", Func, 0},
		{"DecodeRune", Func, 0},
		{"DecodeRuneInString", Func, 0},
		{"EncodeRune", Func, 0},
		{"FullRune", Func, 0},
		{"FullRuneInString", Func, 0},

pkg unicode, var Zs *RangeTable
pkg unicode/utf16, func Decode([]uint16) []int32
pkg unicode/utf16, func DecodeRune(int32, int32) int32
pkg unicode/utf16, func Encode([]int32) []uint16
pkg unicode/utf16, func EncodeRune(int32) (int32, int32)
pkg unicode/utf16, func IsSurrogate(int32) bool
pkg unicode/utf8, const MaxRune ideal-char
pkg unicode/utf8, const RuneError ideal-char
pkg unicode/utf8, const RuneSelf ideal-int