return err
	} else if match {
		return nil
	}

	// normalize the name to letters, digits, _ or $
	valid := true
	cleaned := strings.Map(func(r rune) rune {
		switch {
		case unicode.IsLetter(r):
			return 'a'
		case unicode.IsDigit(r):
			return '0'
		case r == '_', r == '$':
			return r
		default:
			valid = false
			return -1
		}

	if x == y {
		return true
	}

	if c.ignoreInvalids && (!isValid(x) || !isValid(y)) {
		return true
	}

	switch x := x.(type) {
	case *Basic:
		// Basic types are singletons except for the rune and byte
		// aliases, thus we cannot solely rely on the x == y check
		// above. See also comment in TypeName.IsAlias.
		if y, ok := y.(*Basic); ok {
			return x.kind == y.kind
		}

	case *Array:

	for range cs {}
	for range "" {}
	for i, x := range cs { _, _ = i, x }
	for i, x := range "" {
		var ii int
		ii = i
		_ = ii
		var xx rune
		xx = x
		_ = xx
	}
}

func rangeloops2() {
	type I int
	type R rune

	var a [10]int
	var i I
	_ = i
	for i /* ERRORx `cannot use .* in assignment` */ = range a {}
	for i /* ERRORx `cannot use .* in assignment` */ = range &a {}

			bufioWriterPool.Put(bufioWriter)
		}()

		bufioWriter.Reset(buf)
		opts := sql.WriteCSVOpts{
			FieldDelimiter: []rune(s3Select.Output.CSVArgs.FieldDelimiter)[0],
			Quote:          []rune(s3Select.Output.CSVArgs.QuoteCharacter)[0],
			QuoteEscape:    []rune(s3Select.Output.CSVArgs.QuoteEscapeCharacter)[0],
			AlwaysQuote:    strings.EqualFold(s3Select.Output.CSVArgs.QuoteFields, "always"),
		}

)

// JSEscape writes to w the escaped JavaScript equivalent of the plain text data b.
func JSEscape(w io.Writer, b []byte) {
	last := 0
	for i := 0; i < len(b); i++ {
		c := b[i]

		if !jsIsSpecial(rune(c)) {
			// fast path: nothing to do
			continue
		}
		w.Write(b[last:i])

		if c < utf8.RuneSelf {
			// Quotes, slashes and angle brackets get quoted.
			// Control characters get written as \u00XX.

		{`package c1b; var _ = int(0)`, `int(0)`, `int`, `0`},
		{`package c1c; type T int; var _ = T(0)`, `T(0)`, `c1c.T`, `0`},

		{`package c2a; var _ = rune('A')`, `'A'`, `rune`, `65`},
		{`package c2b; var _ = rune('A')`, `rune('A')`, `rune`, `65`},
		{`package c2c; type T rune; var _ = T('A')`, `T('A')`, `c2c.T`, `65`},

		{`package c3a; var _ = float32(0.)`, `0.`, `float32`, `0`},

	if x == y {
		return true
	}

	if c.ignoreInvalids && (!isValid(x) || !isValid(y)) {
		return true
	}

	switch x := x.(type) {
	case *Basic:
		// Basic types are singletons except for the rune and byte
		// aliases, thus we cannot solely rely on the x == y check
		// above. See also comment in TypeName.IsAlias.
		if y, ok := y.(*Basic); ok {
			return x.kind == y.kind
		}

	case *Array:

		{`package c1b; var _ = int(0)`, `int(0)`, `int`, `0`},
		{`package c1c; type T int; var _ = T(0)`, `T(0)`, `c1c.T`, `0`},

		{`package c2a; var _ = rune('A')`, `'A'`, `rune`, `65`},
		{`package c2b; var _ = rune('A')`, `rune('A')`, `rune`, `65`},
		{`package c2c; type T rune; var _ = T('A')`, `T('A')`, `c2c.T`, `65`},

		{`package c3a; var _ = float32(0.)`, `0.`, `float32`, `0`},

	var args []string
	arg := make([]rune, len(s))
	escaped := false
	quoted := false
	quote := '\x00'
	i := 0
	for _, rune := range s {
		switch {
		case escaped:
			escaped = false
		case rune == '\\':
			escaped = true
			continue
		case quote != '\x00':
			if rune == quote {
				quote = '\x00'
				continue
			}
		case rune == '"' || rune == '\'':
			quoted = true

	}

	return &emphPlain{Plain: Plain{s[i:j]}, canOpen: canOpen, canClose: canClose, n: j - i}, i, j, true
}

func isUnicodeSpace(r rune) bool {
	if r < 0x80 {
		return r == ' ' || r == '\t' || r == '\f' || r == '\n'
	}
	return unicode.In(r, unicode.Zs)
}

func isUnicodePunct(r rune) bool {
	if r < 0x80 {
		return isPunct(byte(r))
	}
	return unicode.In(r, unicode.Punct)
}