// trimSpace returns x without any leading or trailing ASCII whitespace.
func trimSpace(x string) string {
	for len(x) > 0 && isSpace(x[0]) {
		x = x[1:]
	}
	for len(x) > 0 && isSpace(x[len(x)-1]) {
		x = x[:len(x)-1]
	}
	return x
}

// isSpace reports whether b is an ASCII space character.
func isSpace(b byte) bool {
	return b == ' ' || b == '\t' || b == '\n' || b == '\r'
}

	rest = strings.TrimLeftFunc(v, unicode.IsSpace)
	if !strings.HasPrefix(rest, ";") {
		return "", "", v
	}

	rest = rest[1:] // consume semicolon
	rest = strings.TrimLeftFunc(rest, unicode.IsSpace)
	param, rest = consumeToken(rest)
	param = strings.ToLower(param)
	if param == "" {
		return "", "", v
	}

	rest = strings.TrimLeftFunc(rest, unicode.IsSpace)
	if !strings.HasPrefix(rest, "=") {

					if !isSpace(inputc) && inputc != eof {
						s.errorString("expected space in input to match format")
					}
					if inputc == '\n' {
						s.errorString("newline in input does not match format")
					}
				}
				for isSpace(inputc) && inputc != '\n' {
					inputc = s.getRune()
				}
				if inputc != eof {
					s.UnreadRune()
				}
			}
			continue
		}

		// Verbs.

	}
}

// lexSpace scans a run of space characters.
// We have not consumed the first space, which is known to be present.
// Take care if there is a trim-marked right delimiter, which starts with a space.
func lexSpace(l *lexer) stateFn {
	var r rune
	var numSpaces int
	for {
		r = l.peek()
		if !isSpace(r) {
			break
		}
		l.next()
		numSpaces++
	}

			}
		}
		i++
	}
	return append(a, s)
}

// rewrite rewrites a subname to having only printable characters and no white
// space.
// From go/src/testing/match.go
func rewrite(s string) string {
	b := []byte{}
	for _, r := range s {
		switch {
		case isSpace(r):
			b = append(b, '_')
		case !strconv.IsPrint(r):
			s := strconv.QuoteRune(r)
			b = append(b, s[1:len(s)-1]...)
		default:

	}
	return s.error(c, "")
}

// stateEndTop is the state after finishing the top-level value,
// such as after reading `{}` or `[1,2,3]`.
// Only space characters should be seen now.
func stateEndTop(s *scanner, c byte) int {
	if !isSpace(c) {
		// Complain about non-space byte on next call.
		s.error(c, "after top-level value")
	}
	return scanEnd
}

// stateInString is the state after reading `"`.

	}
	return Is(Punct, r)
}

// IsSpace reports whether the rune is a space character as defined
// by Unicode's White Space property; in the Latin-1 space
// this is
//
//	'\t', '\n', '\v', '\f', '\r', ' ', U+0085 (NEL), U+00A0 (NBSP).
//
// Other definitions of spacing characters are set by category
// Z and property [Pattern_White_Space].
func IsSpace(r rune) bool {

					" isn't testing.", s)
			}
			if c > unicode.MaxASCII {
				t.Skipf("skipping %#q: contains a non-ASCII character %q", s, c)
			}
			if !unicode.IsGraphic(rune(c)) && !unicode.IsSpace(rune(c)) {
				t.Skipf("skipping %#q: contains non-graphic character %q", s, c)
			}
			if runtime.GOOS == "windows" && c == '\r' || c == '\n' {
				t.Skipf("skipping %#q on Windows: contains unescapable character %q", s, c)

		"not " + p.name,
	}
}

var trimFuncTests = []struct {
	f        predicate
	in       string
	trimOut  string
	leftOut  string
	rightOut string
}{
	{isSpace, space + " hello " + space,
		"hello",
		"hello " + space,
		space + " hello"},
	{isDigit, "\u0e50\u0e5212hello34\u0e50\u0e51",
		"hello",
		"hello34\u0e50\u0e51",
		"\u0e50\u0e5212hello"},

	for i := 0; i < len(s); i++ {
		r := s[i]
		setBits |= r
		isSpace := int(asciiSpace[r])
		n += wasSpace & ^isSpace
		wasSpace = isSpace
	}

	if setBits >= utf8.RuneSelf {
		// Some runes in the input string are not ASCII.
		return FieldsFunc(s, unicode.IsSpace)
	}
	// ASCII fast path
	a := make([]string, n)
	na := 0
	fieldStart := 0
	i := 0
	// Skip spaces in the front of the input.