ch == '*' || ch == '\'' || ch == '%' ||
					isTSpecial(rune(ch)) {

					b.WriteString(value[offset:index])
					offset = index + 1

					b.WriteByte('%')
					b.WriteByte(upperhex[ch>>4])
					b.WriteByte(upperhex[ch&0x0F])
				}
			}
			b.WriteString(value[offset:])
			continue
		}

		if isToken(value) {
			b.WriteString(value)
			continue
		}

		b.WriteByte('"')
		offset := 0

	j := 0
	for i := 0; i < len(s); i++ {
		switch c := s[i]; {
		case c == ' ' && mode == encodeQueryComponent:
			t[j] = '+'
			j++
		case shouldEscape(c, mode):
			t[j] = '%'
			t[j+1] = upperhex[c>>4]
			t[j+2] = upperhex[c&15]
			j += 3
		default:
			t[j] = s[i]
			j++
		}
	}
	return string(t)
}

// A URL represents a parsed URL (technically, a URI reference).
//