func ToValidOperationID(s string, capitalizeFirstLetter bool) string {
	var buffer bytes.Buffer
	capitalize := capitalizeFirstLetter
	for i, r := range s {
		if unicode.IsLetter(r) || r == '_' || (i != 0 && unicode.IsDigit(r)) {
			if capitalize {
				buffer.WriteRune(unicode.ToUpper(r))
				capitalize = false
			} else {
				buffer.WriteRune(r)
			}
		} else {
			capitalize = true

		}
		p.pos = p.i
		p.i += 2
		p.tok = p.s[p.pos:p.i]
		return
	}

	tag := p.s[p.i:]
	for i, c := range tag {
		if !unicode.IsLetter(c) && !unicode.IsDigit(c) && c != '_' && c != '.' {
			tag = tag[:i]
			break
		}
	}
	if tag == "" {
		c, _ := utf8.DecodeRuneInString(p.s[p.i:])

var Inscriptional_Parthian <type 1>;
func Is (rangeTab <type 1>, r <type -21>) <type -15>;
func IsControl (r <type -21>) <type -15>;
func IsDigit (r <type -21>) <type -15>;
func IsGraphic (r <type -21>) <type -15>;
func IsLetter (r <type -21>) <type -15>;
func IsLower (r <type -21>) <type -15>;
func IsMark (r <type -21>) <type -15>;
func IsNumber (r <type -21>) <type -15>;
func IsOneOf (ranges <type 23 [] <type 24 *<type 2>>>, r <type -21>) <type -15>;

	"P-521",
	"P-384",
	"X25519",
	"X25519Kyber768Draft00",
)

func IsValidCipherSuite(cs string) bool {
	if cs == "" || cs == "ALL" {
		return true
	}
	if !unicode.IsNumber(rune(cs[0])) && !unicode.IsLetter(rune(cs[0])) {
		// Not all of these are correct, but this is needed to support advanced cases like - and + operators
		// without needing to parse the full expression
		return true
	}

		if c := s[n]; c < utf8.RuneSelf {
			if isIdentASCII(c) && (n > 0 || c < '0' || c > '9') {
				n++
				continue
			}
			break
		}
		r, nr := utf8.DecodeRuneInString(s[n:])
		if unicode.IsLetter(r) {
			n += nr
			continue
		}
		break
	}
	return s[:n], n > 0
}

// isIdentASCII reports whether c is an ASCII identifier byte.
func isIdentASCII(c byte) bool {

				check.pass.Reportf(pos, "invalid double negative in build constraint: %s", arg)
				check.crossCheck = false
				continue
			}
			elem = strings.TrimPrefix(elem, "!")
			for _, c := range elem {
				if !unicode.IsLetter(c) && !unicode.IsDigit(c) && c != '_' && c != '.' {
					check.pass.Reportf(pos, "invalid non-alphanumeric build constraint: %s", arg)
					check.crossCheck = false
					break
				}
			}
		}
	}

	line = strings.TrimSpace(line)

	// a heading must start with an uppercase letter
	r, _ := utf8.DecodeRuneInString(line)
	if !unicode.IsLetter(r) || !unicode.IsUpper(r) {
		return false
	}

	// it must end in a letter or digit:
	r, _ = utf8.DecodeLastRuneInString(line)
	if !unicode.IsLetter(r) && !unicode.IsDigit(r) {
		return false
	}

	// exclude lines with illegal characters. we allow "(),"

func goodName(name string) bool {
	if name == "" {
		return false
	}
	for i, r := range name {
		switch {
		case r == '_':
		case i == 0 && !unicode.IsLetter(r):
			return false
		case !unicode.IsLetter(r) && !unicode.IsDigit(r):
			return false
		}
	}
	return true
}

// findFunction looks for a function in the template, and global map.

	//	characters, space, <, and >. If the URI includes these characters,
	//	they must be percent-encoded (e.g. %20 for a space).

	j := i
	if j+1 >= len(s) || s[j] != '<' || !isLetter(s[j+1]) {
		return nil, 0, false
	}
	j++
	for j < len(s) && isScheme(s[j]) && j-(i+1) <= 32 {
		j++
	}
	if j-(i+1) < 2 || j-(i+1) > 32 || j >= len(s) || s[j] != ':' {
		return nil, 0, false
	}

func matchTag(name string, tags map[string]bool, prefer bool) bool {
	// Tags must be letters, digits, underscores or dots.
	// Unlike in Go identifiers, all digits are fine (e.g., "386").
	for _, c := range name {
		if !unicode.IsLetter(c) && !unicode.IsDigit(c) && c != '_' && c != '.' {
			return false
		}
	}

	if tags["*"] && name != "" && name != "ignore" {
		// Special case for gathering all possible imports: