cutSet := " "
	if trimChars != "" {
		cutSet = trimChars
	}

	trimFunc := strings.Trim
	switch {
	case where == nil:
	case *where == trimBoth:
	case *where == trimLeading:
		trimFunc = strings.TrimLeft
	case *where == trimTrailing:
		trimFunc = strings.TrimRight
	default:
		return "", errInvalidTrimArg
	}

	return trimFunc(text, cutSet), nil

	// Output: ["Achtung! Achtung"]
}

func ExampleTrimFunc() {
	fmt.Println(string(bytes.TrimFunc([]byte("go-gopher!"), unicode.IsLetter)))
	fmt.Println(string(bytes.TrimFunc([]byte("\"go-gopher!\""), unicode.IsLetter)))
	fmt.Println(string(bytes.TrimFunc([]byte("go-gopher!"), unicode.IsPunct)))
	fmt.Println(string(bytes.TrimFunc([]byte("1234go-gopher!567"), unicode.IsNumber)))
	// Output:
	// -gopher!
	// "go-gopher!"

	From     *PrimaryTerm `parser:" \"FROM\" @@ \")\" "`
}

// TrimFunc represents TRIM sql function
type TrimFunc struct {
	TrimWhere *string      `parser:" \"TRIM\" \"(\" ( @( \"LEADING\" | \"TRAILING\" | \"BOTH\" ) "`
	TrimChars *PrimaryTerm `parser:"             @@?  "`

	if i >= 0 && s[i] >= utf8.RuneSelf {
		_, wid := utf8.DecodeRune(s[i:])
		i += wid
	} else {
		i++
	}
	return s[0:i]
}

// TrimFunc returns a subslice of s by slicing off all leading and trailing
// UTF-8-encoded code points c that satisfy f(c).
func TrimFunc(s []byte, f func(r rune) bool) []byte {
	return TrimRightFunc(TrimLeftFunc(s, f), f)
}

// TrimPrefix returns s without the provided leading prefix string.

			return nil, errIncorrectSQLFunctionArgumentType(err)
		}
	}

	res, err := evalSQLSubstring(s, int(startIdx), length)
	return FromString(res), err
}

func handleSQLTrim(r Record, e *TrimFunc, tableAlias string) (res *Value, err error) {
	chars := ""
	ok := false
	if e.TrimChars != nil {
		charsV, cerr := e.TrimChars.evalNode(r, tableAlias)
		if cerr != nil {
			return nil, cerr
		}

					b0 = fmt.Sprintf("%s: ", string(b))
				}
				b, err := decode(r, file)
				if err != nil {
					return err
				}
				b = bytes.TrimSpace(b)
				if !ndjson {
					b = bytes.TrimFunc(b, func(r rune) bool {
						return r == '{' || r == '}' || r == '\n' || r == '\r'
					})
				}

				toPrint = append(toPrint, fmt.Sprintf("%s%s", b0, string(b)))
			}
		}
		sort.Strings(toPrint)

func TestTrimFunc(t *testing.T) {
	for _, tc := range trimFuncTests {
		trimmers := []struct {
			name string
			trim func(s []byte, f func(r rune) bool) []byte
			out  []byte
		}{
			{"TrimFunc", TrimFunc, tc.trimOut},
			{"TrimLeftFunc", TrimLeftFunc, tc.leftOut},
			{"TrimRightFunc", TrimRightFunc, tc.rightOut},
		}
		for _, trimmer := range trimmers {
			actual := trimmer.trim([]byte(tc.in), tc.f.f)

pkg bytes, func ToUpper([]uint8) []uint8
pkg bytes, func ToUpperSpecial(unicode.SpecialCase, []uint8) []uint8
pkg bytes, func Trim([]uint8, string) []uint8
pkg bytes, func TrimFunc([]uint8, func(int32) bool) []uint8
pkg bytes, func TrimLeft([]uint8, string) []uint8
pkg bytes, func TrimLeftFunc([]uint8, func(int32) bool) []uint8
pkg bytes, func TrimRight([]uint8, string) []uint8