convx/to_string.go

package convx

import (
	"fmt"
	"strconv"
)

// interface 转 string
// func ToString(val interface{}) (str string, err error) {

// 	var s string
// 	if vv, ok := val.(float32); ok {
// 		s = strconv.FormatFloat(float64(vv), 'f', -1, 32)
// 	} else if vv, ok := val.(float64); ok {
// 		s = strconv.FormatFloat(vv, 'f', -1, 64)
// 	} else if vv, ok := val.(int); ok {
// 		s = strconv.Itoa(vv)
// 	} else if vv, ok := val.(int32); ok {
// 		s = strconv.Itoa(int(vv))
// 	} else if vv, ok := val.(int64); ok {
// 		s = strconv.FormatInt(vv, 10)
// 	} else if vv, ok := val.(string); ok {
// 		s = vv
// 	} else if vv, ok := val.(bool); ok {
// 		s = strconv.FormatBool(vv)
// 	} else if vv, ok := val.(uint); ok {
// 		s = strconv.FormatUint(uint64(vv), 10)
// 	} else if vv, ok := val.(uint32); ok {
// 		s = strconv.FormatUint(uint64(vv), 10)
// 	} else if vv, ok := val.(uint64); ok {
// 		s = strconv.FormatUint(vv, 10)
// 	} else if vv, ok := val.(uint8); ok {
// 		s = strconv.FormatUint(uint64(vv), 10)
// 	} else if vv, ok := val.(uint16); ok {
// 		s = strconv.FormatUint(uint64(vv), 10)
// 	} else if vv, ok := val.(int8); ok {
// 		s = strconv.FormatInt(int64(vv), 10)
// 	} else if vv, ok := val.(int16); ok {
// 		s = strconv.FormatInt(int64(vv), 10)
// 	} else {
// 		return s, errors.New("不支持的参数类型")
// 	}
// 	return s, nil
// }

func ToString(val interface{}) (string, error) {
	switch v := val.(type) {
	case float32:
		return strconv.FormatFloat(float64(v), 'f', -1, 32), nil
	case float64:
		return strconv.FormatFloat(v, 'f', -1, 64), nil
	case int:
		return strconv.Itoa(v), nil
	case int32:
		return strconv.Itoa(int(v)), nil
	case int64:
		return strconv.FormatInt(v, 10), nil
	case string:
		return v, nil
	case bool:
		return strconv.FormatBool(v), nil
	case uint:
		return strconv.FormatUint(uint64(v), 10), nil
	case uint32:
		return strconv.FormatUint(uint64(v), 10), nil
	case uint64:
		return strconv.FormatUint(v, 10), nil
	case uint8:
		return strconv.FormatUint(uint64(v), 10), nil
	case uint16:
		return strconv.FormatUint(uint64(v), 10), nil
	case int8:
		return strconv.FormatInt(int64(v), 10), nil
	case int16:
		return strconv.FormatInt(int64(v), 10), nil
	default:
		return fmt.Sprintf("%v", val), nil
	}
}