优化类型的定义

to_float64.go

@@ -8,40 +8,45 @@ import (
 
 // interface 转 float64
 func ToFloat64(val interface{}) (f float64, err error) {
-	if v, ok := val.(string); ok {
-		f, err = strconv.ParseFloat(v, 64)
-	} else if v, ok := val.(float64); ok {
+
+	switch v := val.(type) {
+	case nil:
+		return 0, errors.New("val is nil")
+	case float32:
+		return float64(v), nil
+	case float64:
 		return v, nil
-	} else if v, ok := val.(float32); ok {
+	case int:
 		return float64(v), nil
-	} else if v, ok := val.(int); ok {
+	case int8:
 		return float64(v), nil
-	} else if v, ok := val.(int8); ok {
+	case int16:
 		return float64(v), nil
-	} else if v, ok := val.(int16); ok {
+	case int32:
 		return float64(v), nil
-	} else if v, ok := val.(int32); ok {
+	case int64:
 		return float64(v), nil
-	} else if v, ok := val.(int64); ok {
+	case uint:
 		return float64(v), nil
-	} else if v, ok := val.(uint); ok {
+	case uint8:
 		return float64(v), nil
-	} else if v, ok := val.(uint8); ok {
+	case uint16:
 		return float64(v), nil
-	} else if v, ok := val.(uint16); ok {
+	case uint32:
 		return float64(v), nil
-	} else if v, ok := val.(uint32); ok {
+	case uint64:
 		return float64(v), nil
-	} else if v, ok := val.(uint64); ok {
-		return float64(v), nil
-	} else if v, ok := val.(bool); ok {
+	case string:
+		return strconv.ParseFloat(v, 64)
+	case bool:
 		if v {
 			return 1, nil
 		} else {
 			return 0, nil
 		}
-	} else {
-		return 0, errors.New("类型转换失败")
+	case []byte:
+		return strconv.ParseFloat(string(v), 64)
 	}
-	return
+
+	return 0, errors.New("convx.ToFloat64: unknown type")
 }