func ExampleToUpper() {
	fmt.Printf("%s", bytes.ToUpper([]byte("Gopher")))
	// Output: GOPHER
}

func ExampleToUpperSpecial() {
	str := []byte("ahoj vývojári golang")
	totitle := bytes.ToUpperSpecial(unicode.AzeriCase, str)
	fmt.Println("Original : " + string(str))
	fmt.Println("ToUpper : " + string(totitle))
	// Output:
	// Original : ahoj vývojári golang
	// ToUpper : AHOJ VÝVOJÁRİ GOLANG

	}
}

func upper(s string) string {
	if s == "" {
		return ""
	}
	r, size := utf8.DecodeRuneInString(s)
	if r == '_' {
		return "X" + s
	}
	return string(unicode.ToUpper(r)) + s[size:]
}

// godefsFields rewrites field names for use in Go or C definitions.
// It strips leading common prefixes (like tv_ in tv_sec, tv_usec)

}

func TestToUpper(t *testing.T) { runStringTests(t, ToUpper, "ToUpper", upperTests) }

func TestToLower(t *testing.T) { runStringTests(t, ToLower, "ToLower", lowerTests) }

func BenchmarkToUpper(b *testing.B) {
	for _, tc := range upperTests {
		tin := []byte(tc.in)
		b.Run(tc.in, func(b *testing.B) {
			for i := 0; i < b.N; i++ {
				actual := ToUpper(tin)
				if !Equal(actual, tc.out) {

	for bp < n {
		chunk := bp
		if chunk > chunkMax {
			chunk = chunkMax
		}
		bp += copy(nb[bp:], nb[:chunk])
	}
	return nb
}

// ToUpper returns a copy of the byte slice s with all Unicode letters mapped to
// their upper case.
func ToUpper(s []byte) []byte {
	isASCII, hasLower := true, false
	for i := 0; i < len(s); i++ {
		c := s[i]
		if c >= utf8.RuneSelf {
			isASCII = false
			break
		}

pkg go/version, func IsValid(string) bool #62039
pkg go/version, func Lang(string) string #62039
pkg html/template, const ErrJSTemplate //deprecated #61619
pkg io, method (*SectionReader) Outer() (ReaderAt, int64, int64) #61870
pkg log/slog, func SetLogLoggerLevel(Level) Level #62418
pkg math/big, method (*Rat) FloatPrec() (int, bool) #50489
pkg math/rand/v2, func ExpFloat64() float64 #61716