return 0, 3 // Illegal UTF-8: not a continuation byte.
		}
		return t.lookupValue(uint32(i), c3), 4
	}
	// Illegal rune
	return 0, 1
}

// lookupUnsafe returns the trie value for the first UTF-8 encoding in s.
// s must start with a full and valid UTF-8 encoded rune.
func (t *bidiTrie) lookupUnsafe(s []byte) uint8 {
	c0 := s[0]
	if c0 < 0x80 { // is ASCII
		return bidiValues[c0]
	}
	i := bidiIndex[c0]

			return 0, 3 // Illegal UTF-8: not a continuation byte.
		}
		return t.lookupValue(uint32(i), c3), 4
	}
	// Illegal rune
	return 0, 1
}

// lookupUnsafe returns the trie value for the first UTF-8 encoding in s.
// s must start with a full and valid UTF-8 encoded rune.
func (t *bidiTrie) lookupUnsafe(s []byte) uint8 {
	c0 := s[0]
	if c0 < 0x80 { // is ASCII
		return bidiValues[c0]
	}
	i := bidiIndex[c0]

			return 0, 3 // Illegal UTF-8: not a continuation byte.
		}
		return t.lookupValue(uint32(i), c3), 4
	}
	// Illegal rune
	return 0, 1
}

// lookupUnsafe returns the trie value for the first UTF-8 encoding in s.
// s must start with a full and valid UTF-8 encoded rune.
func (t *caseTrie) lookupUnsafe(s []byte) uint16 {
	c0 := s[0]
	if c0 < 0x80 { // is ASCII
		return caseValues[c0]
	}

		// add underscore if last letter is capital letter
		// add underscore when previous letter is lowercase
		// add underscore when next letter is lowercase
		if (i != 0 || i == l-1) && ((i > 0 && rune(camel[i-1]) >= 'a') ||
			(i < l-1 && rune(camel[i+1]) >= 'a')) {
			b.WriteRune('_')
		}
		b.WriteRune(v + 'a' - 'A')
	}
	return b.String()

							w.Header().Set(k, v)
						}

						if opts.PartNumber > 0 && strings.Contains(ci.ETag, "-") {
							w.Header()[xhttp.AmzMpPartsCount] = []string{
								strings.TrimLeftFunc(ci.ETag, func(r rune) bool {
									return !unicode.IsNumber(r)
								}),
							}
						}

						// For providing ranged content
						start, rangeLen, err := rs.GetOffsetLength(ci.Size)
						if err != nil {

// automatically.
func dirToImportPath(dir string) string {
	return pathpkg.Join("_", strings.Map(makeImportValid, filepath.ToSlash(dir)))
}

func makeImportValid(r rune) rune {
	// Should match Go spec, compilers, and ../../go/parser/parser.go:/isValidImport.
	const illegalChars = `!"#$%&'()*,:;<=>?[\]^{|}` + "`\uFFFD"

				}
			}

			if len(unmatched) > 0 {
				t.Errorf("expected errors %v", unmatched)
			}
		})
	}
}

func genString(n int, c rune) string {
	b := strings.Builder{}
	for i := 0; i < n; i++ {
		_, err := b.WriteRune(c)
		if err != nil {
			panic(err)
		}
	}
	return b.String()
}