示例#1
0
func (p *printer) marshalSimple(typ reflect.Type, val reflect.Value) (string, []byte, error) {
	switch val.Kind() {
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		return strconv.FormatInt(val.Int(), 10), nil, nil
	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
		return strconv.FormatUint(val.Uint(), 10), nil, nil
	case reflect.Float32, reflect.Float64:
		return strconv.FormatFloat(val.Float(), 'g', -1, val.Type().Bits()), nil, nil
	case reflect.String:
		return val.String(), nil, nil
	case reflect.Bool:
		return strconv.FormatBool(val.Bool()), nil, nil
	case reflect.Array:
		if typ.Elem().Kind() != reflect.Uint8 {
			break
		}
		// [...]byte
		var bytes []byte
		if val.CanAddr() {
			bytes = val.Slice(0, val.Len()).Bytes()
		} else {
			bytes = make([]byte, val.Len())
			reflect.Copy(reflect.ValueOf(bytes), val)
		}
		return "", bytes, nil
	case reflect.Slice:
		if typ.Elem().Kind() != reflect.Uint8 {
			break
		}
		// []byte
		return "", val.Bytes(), nil
	}
	return "", nil, &UnsupportedTypeError{typ}
}
示例#2
0
文件: sphinxql.go 项目: Carbyn/sphinx
func GetColVals(val reflect.Value, cols []string) (values []string, err error) {
	typ := val.Type()
	// if not struct, then must just have one column.
	if val.Kind() != reflect.Struct && len(cols) != 1 {
		return nil, fmt.Errorf("GetColVals> If not a struct(%s), must have one column: %v", val.Kind(), cols)
	}

	values = make([]string, len(cols))
	for i, col := range cols {
		var fieldVal reflect.Value
		if val.Kind() == reflect.Struct {
			fieldIndex := getFieldIndexByName(typ, col)
			if fieldIndex[0] < 0 {
				return nil, fmt.Errorf("GetColVals> Can't found struct field(column): '%s'\n", col)
			}
			fieldVal = val.FieldByIndex(fieldIndex)
		} else {
			fieldVal = val
		}

		if values[i], err = GetValQuoteStr(fieldVal); err != nil {
			return
		}
	}

	return
}
示例#3
0
func ReturnWhenSet(a, k interface{}) interface{} {
	av, isNil := indirect(reflect.ValueOf(a))
	if isNil {
		return ""
	}

	var avv reflect.Value
	switch av.Kind() {
	case reflect.Array, reflect.Slice:
		index, ok := k.(int)
		if ok && av.Len() > index {
			avv = av.Index(index)
		}
	case reflect.Map:
		kv := reflect.ValueOf(k)
		if kv.Type().AssignableTo(av.Type().Key()) {
			avv = av.MapIndex(kv)
		}
	}

	if avv.IsValid() {
		switch avv.Kind() {
		case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
			return avv.Int()
		case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
			return avv.Uint()
		case reflect.Float32, reflect.Float64:
			return avv.Float()
		case reflect.String:
			return avv.String()
		}
	}

	return ""
}
示例#4
0
func setValue(dstVal reflect.Value, src interface{}) {
	if dstVal.Kind() == reflect.Ptr {
		dstVal = reflect.Indirect(dstVal)
	}
	srcVal := reflect.ValueOf(src)

	if !srcVal.IsValid() { // src is literal nil
		if dstVal.CanAddr() {
			// Convert to pointer so that pointer's value can be nil'ed
			//                     dstVal = dstVal.Addr()
		}
		dstVal.Set(reflect.Zero(dstVal.Type()))

	} else if srcVal.Kind() == reflect.Ptr {
		if srcVal.IsNil() {
			srcVal = reflect.Zero(dstVal.Type())
		} else {
			srcVal = reflect.ValueOf(src).Elem()
		}
		dstVal.Set(srcVal)
	} else {
		dstVal.Set(srcVal)
	}

}
示例#5
0
// Validates that if a value is provided for a field, that value must be at
// least a minimum length.
func validateFieldMin(f reflect.StructField, fvalue reflect.Value) error {
	minStr := f.Tag.Get("min")
	if minStr == "" {
		return nil
	}
	min, _ := strconv.ParseInt(minStr, 10, 64)

	kind := fvalue.Kind()
	if kind == reflect.Ptr {
		if fvalue.IsNil() {
			return nil
		}
		fvalue = fvalue.Elem()
	}

	switch fvalue.Kind() {
	case reflect.String:
		if int64(fvalue.Len()) < min {
			return fmt.Errorf("field too short, minimum length %d", min)
		}
	case reflect.Slice, reflect.Map:
		if fvalue.IsNil() {
			return nil
		}
		if int64(fvalue.Len()) < min {
			return fmt.Errorf("field too short, minimum length %d", min)
		}

		// TODO min can also apply to number minimum value.

	}
	return nil
}
示例#6
0
文件: env.go 项目: coolwust/env
// rv must be a non-nil pointer or a settable value
func indirect(rv reflect.Value) (reflect.Value, error) {
	for {
		if rv.Kind() == reflect.Interface && !rv.IsNil() {
			if e := rv.Elem(); e.Kind() == reflect.Ptr && !e.IsNil() {
				rv = e.Elem()
			}
		}

		if rv.Kind() == reflect.Map && rv.IsNil() {
			rv.Set(reflect.MakeMap(rv.Type()))
		}

		if rv.Kind() != reflect.Ptr {
			break
		}

		if rv.IsNil() {
			rv.Set(reflect.New(rv.Type().Elem()))
		}
		rv = rv.Elem()
	}
	if k := rv.Kind(); k != reflect.Struct && k != reflect.Map {
		return reflect.Value{}, &InvalidIndirectError{rv.Type()}
	}
	if rv.Kind() == reflect.Map {
		if t := rv.Type(); t.Key().Kind() != reflect.String || t.Elem().Kind() != reflect.String {
			return reflect.Value{}, &InvalidIndirectError{t}
		}
	}
	return rv, nil
}
示例#7
0
func (mssql) SqlTag(value reflect.Value, size int, autoIncrease bool) string {
	switch value.Kind() {
	case reflect.Bool:
		return "bit"
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uintptr:
		if autoIncrease {
			return "int IDENTITY(1,1)"
		}
		return "int"
	case reflect.Int64, reflect.Uint64:
		if autoIncrease {
			return "bigint IDENTITY(1,1)"
		}
		return "bigint"
	case reflect.Float32, reflect.Float64:
		return "float"
	case reflect.String:
		if size > 0 && size < 65532 {
			return fmt.Sprintf("nvarchar(%d)", size)
		}
		return "text"
	case reflect.Struct:
		if _, ok := value.Interface().(time.Time); ok {
			return "datetime2"
		}
	default:
		if _, ok := value.Interface().([]byte); ok {
			if size > 0 && size < 65532 {
				return fmt.Sprintf("varchar(%d)", size)
			}
			return "text"
		}
	}
	panic(fmt.Sprintf("invalid sql type %s (%s) for mssql", value.Type().Name(), value.Kind().String()))
}
示例#8
0
func encodeField(w io.Writer, f reflect.Value) error {
	if f.Type() == timeType {
		return encodeTime(w, f)
	}

	switch f.Kind() {
	case reflect.Uint8:
		fallthrough
	case reflect.Uint16:
		fallthrough
	case reflect.Uint32:
		fallthrough
	case reflect.Uint64:
		fallthrough
	case reflect.Int64:
		fallthrough
	case reflect.Int32:
		fallthrough
	case reflect.Int16:
		fallthrough
	case reflect.Int8:
		return binary.Write(w, byteOrder, f.Interface())
	case reflect.String:
		return encodeStrField(w, f)
	case reflect.Slice:
		return encodeArray(w, f)
	case reflect.Interface:
		return encodeField(w, f.Elem())
	default:
		panic(fmt.Sprintf("unimplemented kind %v", f))
	}
}
示例#9
0
func unflattenValue(v reflect.Value, t reflect.Type) reflect.Value {
	// When t is an Interface, we can't do much, since we don't know the
	// original (unflattened) type of the value placed in v, so we just nop it.
	if t.Kind() == reflect.Interface {
		return v
	}
	// v can be invalid, if it holds the nil value for pointer type
	if !v.IsValid() {
		return v
	}
	// Make sure v is indeed flat
	if v.Kind() == reflect.Ptr {
		panic("unflattening non-flat value")
	}
	// Add a *, one at a time
	for t.Kind() == reflect.Ptr {
		if v.CanAddr() {
			v = v.Addr()
		} else {
			pw := reflect.New(v.Type())
			pw.Elem().Set(v)
			v = pw
		}
		t = t.Elem()
	}
	return v
}
示例#10
0
文件: mapper.go 项目: unrolled/jet
func (m *mapper) unpackValue(keys []string, values []interface{}, out reflect.Value) error {
	switch out.Kind() {
	case reflect.Ptr:
		if out.IsNil() {
			out.Set(reflect.New(out.Type().Elem()))
		}
		return m.unpackValue(keys, values, reflect.Indirect(out))
	case reflect.Slice:
		if keys == nil {
			return m.unpackSimple(nil, values, out)
		} else {
			return m.unpackSlice(keys, values, out)
		}
	case reflect.Struct:
		return m.unpackStruct(keys, values, out)
	case reflect.Map:
		if keys == nil {
			return m.unpackSimple(nil, values, out)
		} else {
			return m.unpackMap(keys, values, out)
		}
	default:
		return m.unpackSimple(nil, values, out)
	}
	return fmt.Errorf("cannot unpack result to %T (%s)", out, out.Kind())
}
示例#11
0
// NotNilFilter returns true for field values that are not nil;
// it returns false otherwise.
func NotNilFilter(_ string, v reflect.Value) bool {
	switch v.Kind() {
	case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice:
		return !v.IsNil()
	}
	return true
}
示例#12
0
func (scope *Scope) callMethod(methodName string, reflectValue reflect.Value) {
	// Only get address from non-pointer
	if reflectValue.CanAddr() && reflectValue.Kind() != reflect.Ptr {
		reflectValue = reflectValue.Addr()
	}

	if methodValue := reflectValue.MethodByName(methodName); methodValue.IsValid() {
		switch method := methodValue.Interface().(type) {
		case func():
			method()
		case func(*Scope):
			method(scope)
		case func(*DB):
			newDB := scope.NewDB()
			method(newDB)
			scope.Err(newDB.Error)
		case func() error:
			scope.Err(method())
		case func(*Scope) error:
			scope.Err(method(scope))
		case func(*DB) error:
			newDB := scope.NewDB()
			scope.Err(method(newDB))
			scope.Err(newDB.Error)
		default:
			scope.Err(fmt.Errorf("unsupported function %v", methodName))
		}
	}
}
示例#13
0
// callSliceRequired returns true if CallSlice is required instead of Call.
func callSliceRequired(param reflect.Type, val reflect.Value) bool {
	vt := val.Type()
	for param.Kind() == reflect.Slice {
		if val.Kind() == reflect.Interface {
			val = reflect.ValueOf(val.Interface())
			vt = val.Type()
		}

		if vt.Kind() != reflect.Slice {
			return false
		}

		vt = vt.Elem()
		if val.Kind() != reflect.Invalid {
			if val.Len() > 0 {
				val = val.Index(0)
			} else {
				val = reflect.Value{}
			}
		}
		param = param.Elem()
	}

	return true
}
示例#14
0
文件: decode.go 项目: nsf/libtorgo
func (d *decoder) parse_unmarshaler(v reflect.Value) bool {
	m, ok := v.Interface().(Unmarshaler)
	if !ok {
		// T doesn't work, try *T
		if v.Kind() != reflect.Ptr && v.CanAddr() {
			m, ok = v.Addr().Interface().(Unmarshaler)
			if ok {
				v = v.Addr()
			}
		}
	}
	if ok && (v.Kind() != reflect.Ptr || !v.IsNil()) {
		if d.read_one_value() {
			err := m.UnmarshalBencode(d.buf.Bytes())
			d.buf.Reset()
			if err != nil {
				panic(&UnmarshalerError{v.Type(), err})
			}
			return true
		}
		d.buf.Reset()
	}

	return false
}
示例#15
0
文件: encode.go 项目: yschu7/go_test
// All protocol buffer fields are nillable, but be careful.
func isNil(v reflect.Value) bool {
	switch v.Kind() {
	case reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice:
		return v.IsNil()
	}
	return false
}
示例#16
0
func visitStruct(val reflect.Value, visitor structVisitor) error {
	if val.Kind() != reflect.Ptr {
		return errNoPointer
	}
	val = reflect.Indirect(val)
	if val.Kind() != reflect.Struct {
		return errNoStruct
	}
	typ := val.Type()
	for ii := 0; ii < typ.NumField(); ii++ {
		field := typ.Field(ii)
		fieldVal := val.Field(ii)
		ptr := fieldVal.Addr().Interface()
		name := defaultFieldName(field.Name)
		var help string
		if n := field.Tag.Get("name"); n != "" {
			name = n
		}
		if h := field.Tag.Get("help"); h != "" {
			help = h
		}
		if name == "" {
			return fmt.Errorf("no name provided for field %s in type %s", field.Name, typ)
		}
		if err := visitor(name, help, &field, fieldVal, ptr); err != nil {
			return err
		}
	}
	return nil
}
示例#17
0
func testSetNilMapsToEmpties(curr reflect.Value) {
	actualCurrValue := curr
	if curr.Kind() == reflect.Ptr {
		actualCurrValue = curr.Elem()
	}

	switch actualCurrValue.Kind() {
	case reflect.Map:
		for _, mapKey := range actualCurrValue.MapKeys() {
			currMapValue := actualCurrValue.MapIndex(mapKey)
			testSetNilMapsToEmpties(currMapValue)
		}

	case reflect.Struct:
		for fieldIndex := 0; fieldIndex < actualCurrValue.NumField(); fieldIndex++ {
			currFieldValue := actualCurrValue.Field(fieldIndex)

			if currFieldValue.Kind() == reflect.Map && currFieldValue.IsNil() {
				newValue := reflect.MakeMap(currFieldValue.Type())
				currFieldValue.Set(newValue)
			} else {
				testSetNilMapsToEmpties(currFieldValue.Addr())
			}
		}

	}

}
示例#18
0
func (q *queryParser) parseValue(v url.Values, value reflect.Value, prefix string, tag reflect.StructTag) error {
	value = elemOf(value)

	// no need to handle zero values
	if !value.IsValid() {
		return nil
	}

	t := tag.Get("type")
	if t == "" {
		switch value.Kind() {
		case reflect.Struct:
			t = "structure"
		case reflect.Slice:
			t = "list"
		case reflect.Map:
			t = "map"
		}
	}

	switch t {
	case "structure":
		return q.parseStruct(v, value, prefix)
	case "list":
		return q.parseList(v, value, prefix, tag)
	case "map":
		return q.parseMap(v, value, prefix, tag)
	default:
		return q.parseScalar(v, value, prefix, tag)
	}
}
示例#19
0
func unwrap(v *reflect.Value) *reflect.Value {
	if v.Kind() == reflect.Interface {
		org := v.Elem() //  Get rid of the wrapping interface
		return &org
	}
	return v
}
示例#20
0
func (p *Decoder) unmarshalArray(pval *plistValue, val reflect.Value) {
	subvalues := pval.value.([]*plistValue)

	var n int
	if val.Kind() == reflect.Slice {
		// Slice of element values.
		// Grow slice.
		cnt := len(subvalues) + val.Len()
		if cnt >= val.Cap() {
			ncap := 2 * cnt
			if ncap < 4 {
				ncap = 4
			}
			new := reflect.MakeSlice(val.Type(), val.Len(), ncap)
			reflect.Copy(new, val)
			val.Set(new)
		}
		n = val.Len()
		val.SetLen(cnt)
	} else if val.Kind() == reflect.Array {
		if len(subvalues) > val.Cap() {
			panic(fmt.Errorf("plist: attempted to unmarshal %d values into an array of size %d", len(subvalues), val.Cap()))
		}
	} else {
		panic(&incompatibleDecodeTypeError{val.Type(), pval.kind})
	}

	// Recur to read element into slice.
	for _, sval := range subvalues {
		p.unmarshal(sval, val.Index(n))
		n++
	}
	return
}
示例#21
0
func (d *commonDialect) SqlTag(value reflect.Value, size int) string {
	switch value.Kind() {
	case reflect.Bool:
		return "BOOLEAN"
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uintptr:
		return "INTEGER"
	case reflect.Int64, reflect.Uint64:
		return "BIGINT"
	case reflect.Float32, reflect.Float64:
		return "FLOAT"
	case reflect.String:
		if size > 0 && size < 65532 {
			return fmt.Sprintf("VARCHAR(%d)", size)
		} else {
			return "VARCHAR(65532)"
		}
	case reflect.Struct:
		if value.Type() == timeType {
			return "TIMESTAMP"
		}
	default:
		if _, ok := value.Interface().([]byte); ok {
			if size > 0 && size < 65532 {
				return fmt.Sprintf("BINARY(%d)", size)
			} else {
				return "BINARY(65532)"
			}
		}
	}
	panic(fmt.Sprintf("invalid sql type %s (%s) for commonDialect", value.Type().Name(), value.Kind().String()))
}
示例#22
0
func (p *Decoder) unmarshalDictionary(pval *plistValue, val reflect.Value) {
	typ := val.Type()
	switch val.Kind() {
	case reflect.Struct:
		tinfo, err := getTypeInfo(typ)
		if err != nil {
			panic(err)
		}

		subvalues := pval.value.(*dictionary).m
		for _, finfo := range tinfo.fields {
			p.unmarshal(subvalues[finfo.name], finfo.value(val))
		}
	case reflect.Map:
		if val.IsNil() {
			val.Set(reflect.MakeMap(typ))
		}

		subvalues := pval.value.(*dictionary).m
		for k, sval := range subvalues {
			keyv := reflect.ValueOf(k).Convert(typ.Key())
			mapElem := val.MapIndex(keyv)
			if !mapElem.IsValid() {
				mapElem = reflect.New(typ.Elem()).Elem()
			}

			p.unmarshal(sval, mapElem)
			val.SetMapIndex(keyv, mapElem)
		}
	default:
		panic(&incompatibleDecodeTypeError{typ, pval.kind})
	}
}
示例#23
0
文件: parsers.go 项目: rymis/parse
func (par *parserParser) ParseValue(ctx *parseContext, valueOf reflect.Value, location int, err *Error) int {
	var v Parser
	if par.ptr {
		v = valueOf.Addr().Interface().(Parser)
	} else {
		if valueOf.Kind() == reflect.Ptr {
			valueOf = reflect.New(valueOf.Type().Elem())
		}
		v = valueOf.Interface().(Parser)
	}

	l, e := v.ParseValue(ctx.str, location)
	if e != nil {
		switch ev := e.(type) {
		case Error:
			err.Location = ev.Location
			err.Message = ev.Message
			err.Str = ev.Str
			return -1
		}
		err.Location = location
		err.Message = e.Error()
		return -1
	}

	location = l
	if location > len(ctx.str) {
		panic("Invalid parser")
	}

	return location
}
示例#24
0
func (p *Decoder) unmarshalLaxString(s string, val reflect.Value) {
	switch val.Kind() {
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		i := mustParseInt(s, 10, 64)
		val.SetInt(i)
		return
	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
		i := mustParseUint(s, 10, 64)
		val.SetUint(i)
		return
	case reflect.Float32, reflect.Float64:
		f := mustParseFloat(s, 64)
		val.SetFloat(f)
		return
	case reflect.Bool:
		b := mustParseBool(s)
		val.SetBool(b)
		return
	case reflect.Struct:
		if val.Type() == timeType {
			t, err := time.Parse(textPlistTimeLayout, s)
			if err != nil {
				panic(err)
			}
			val.Set(reflect.ValueOf(t.In(time.UTC)))
			return
		}
		fallthrough
	default:
		panic(&incompatibleDecodeTypeError{val.Type(), String})
	}
}
示例#25
0
文件: defaults.go 项目: i/defaults
func setField(field reflect.Value, defaultVal string) {
	var iface interface{}
	var err error

	switch field.Kind() {
	case reflect.Bool:
		iface, err = strconv.ParseBool(defaultVal)
	case reflect.Int:
		iface, err = strconv.ParseInt(defaultVal, 10, 64)
		iface = int(iface.(int64))
	case reflect.Int8:
		iface, err = strconv.ParseInt(defaultVal, 10, 8)
		iface = int8(iface.(int64))
	case reflect.Int16:
		iface, err = strconv.ParseInt(defaultVal, 10, 16)
		iface = int16(iface.(int64))
	case reflect.Int32:
		iface, err = strconv.ParseInt(defaultVal, 10, 32)
		iface = int32(iface.(int64))
	case reflect.Int64:
		t, err := time.ParseDuration(defaultVal)
		if err == nil {
			iface, err = t, nil
		} else {
			iface, err = strconv.ParseInt(defaultVal, 10, 64)
		}
	case reflect.Uint:
		iface, err = strconv.ParseUint(defaultVal, 10, 64)
		iface = uint(iface.(uint64))
	case reflect.Uint8:
		iface, err = strconv.ParseUint(defaultVal, 10, 8)
		iface = uint8(iface.(uint64))
	case reflect.Uint16:
		iface, err = strconv.ParseUint(defaultVal, 10, 16)
		iface = uint16(iface.(uint64))
	case reflect.Uint32:
		iface, err = strconv.ParseUint(defaultVal, 10, 32)
		iface = uint32(iface.(uint64))
	case reflect.Uint64:
		iface, err = strconv.ParseUint(defaultVal, 10, 64)
	case reflect.Uintptr:
		iface, err = strconv.ParseUint(defaultVal, 10, 64)
		iface = uintptr(iface.(uint64))
	case reflect.Float32:
		iface, err = strconv.ParseFloat(defaultVal, 32)
		iface = float32(iface.(float64))
	case reflect.Float64:
		iface, err = strconv.ParseFloat(defaultVal, 64)
	case reflect.String:
		iface = defaultVal
	default:
		err = errInvalidFieldType
	}

	if err == nil {
		if field.CanSet() {
			field.Set(reflect.ValueOf(iface))
		}
	}
}
示例#26
0
文件: query.go 项目: mirrr/Sleep
func (q *Query) findPopulatePath(path string) {
	parts := strings.Split(path, ".")
	resultVal := reflect.ValueOf(q.parentStruct).Elem()

	var refVal reflect.Value
	partsLen := len(parts)
	for i := 0; i < partsLen; i++ {
		elem := parts[i]
		if i == 0 {
			refVal = resultVal.FieldByName(elem)
			structTag, _ := resultVal.Type().FieldByName(elem)
			q.popSchema = structTag.Tag.Get(q.z.modelTag)
		} else if i == partsLen-1 {
			structTag, _ := refVal.Type().FieldByName(elem)
			q.popSchema = structTag.Tag.Get(q.z.modelTag)
			refVal = refVal.FieldByName(elem)
		} else {
			//refVal = handleSlice(refVal, elem, path)
			refVal = refVal.FieldByName(elem)
		}

		if !refVal.IsValid() {
			panic("field `" + elem + "` not found in populate path `" + path + "`")
		}
	}

	if refVal.Kind() == reflect.Slice {
		q.isSlice = true
	}
	q.populateField = refVal.Interface()
}
示例#27
0
文件: sphinxql.go 项目: Carbyn/sphinx
// for insert and update
// If already assigned, then just ignore tag
func GetValQuoteStr(val reflect.Value) (string, error) {
	switch val.Kind() {
	case reflect.Bool:
		boolStr := "N"
		if val.Bool() {
			boolStr = "Y"
		}
		return boolStr, nil
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		return strconv.FormatInt(val.Int(), 10), nil
	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
		return strconv.FormatUint(val.Uint(), 10), nil
	case reflect.Float32, reflect.Float64:
		return strconv.FormatFloat(val.Float(), 'f', -1, 64), nil
	case reflect.String:
		return QuoteStr(val.String()), nil
	case reflect.Slice: //[]byte
		if val.Type().Elem().Name() != "uint8" {
			return "", fmt.Errorf("GetValQuoteStr> slicetype is not []byte: %v", val.Interface())
		}
		return QuoteStr(string(val.Interface().([]byte))), nil
	default:
		return "", fmt.Errorf("GetValQuoteStr> reflect.Value is not a string/int/uint/float/bool/[]byte!\nval: %v", val)
	}
	return "", nil
}
示例#28
0
func isZero(v reflect.Value) bool {
	switch v.Kind() {
	case reflect.Func, reflect.Map, reflect.Slice:
		return v.IsNil()
	case reflect.Array:
		z := true
		for i := 0; i < v.Len(); i++ {
			z = z && isZero(v.Index(i))
		}
		return z
	case reflect.Struct:
		if v.Type() == reflect.TypeOf(t) {
			if v.Interface().(time.Time).IsZero() {
				return true
			}
			return false
		}
		z := true
		for i := 0; i < v.NumField(); i++ {
			z = z && isZero(v.Field(i))
		}
		return z
	}
	// Compare other types directly:
	z := reflect.Zero(v.Type())
	return v.Interface() == z.Interface()
}
示例#29
0
文件: yaml.go 项目: samsalisbury/yaml
func isZero(v reflect.Value) bool {
	switch v.Kind() {
	case reflect.String:
		return len(v.String()) == 0
	case reflect.Interface, reflect.Ptr:
		return v.IsNil()
	case reflect.Slice:
		return v.Len() == 0
	case reflect.Map:
		return v.Len() == 0
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		return v.Int() == 0
	case reflect.Float32, reflect.Float64:
		return v.Float() == 0
	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
		return v.Uint() == 0
	case reflect.Bool:
		return !v.Bool()
	case reflect.Struct:
		vt := v.Type()
		for i := v.NumField() - 1; i >= 0; i-- {
			if vt.Field(i).PkgPath != "" {
				continue // Private field
			}
			if !isZero(v.Field(i)) {
				return false
			}
		}
		return true
	}
	return false
}
示例#30
0
文件: encode.go 项目: eswdd/bosun
func (e *Encoder) preEncodeValue(rv reflect.Value) (rv2 reflect.Value, proceed bool) {
LOOP:
	for {
		switch rv.Kind() {
		case reflect.Ptr, reflect.Interface:
			if rv.IsNil() {
				e.e.EncodeNil()
				return
			}
			rv = rv.Elem()
			continue LOOP
		case reflect.Slice, reflect.Map:
			if rv.IsNil() {
				e.e.EncodeNil()
				return
			}
		case reflect.Invalid, reflect.Func:
			e.e.EncodeNil()
			return
		}
		break
	}

	return rv, true
}