mirror of
https://gitee.com/johng/gf
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73 lines
1.4 KiB
Go
73 lines
1.4 KiB
Go
// Copyright 2019 gf Author(https://github.com/gogf/gf). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://github.com/gogf/gf.
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// Package empty provides checks for empty variables.
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package empty
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import (
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"reflect"
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)
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// IsEmpty checks whether given <value> empty.
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// It returns true if <value> is in: 0, nil, false, "", len(slice/map/chan) == 0.
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// Or else it returns true.
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func IsEmpty(value interface{}) bool {
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if value == nil {
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return true
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}
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switch value := value.(type) {
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case int:
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return value == 0
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case int8:
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return value == 0
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case int16:
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return value == 0
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case int32:
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return value == 0
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case int64:
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return value == 0
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case uint:
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return value == 0
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case uint8:
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return value == 0
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case uint16:
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return value == 0
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case uint32:
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return value == 0
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case uint64:
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return value == 0
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case float32:
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return value == 0
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case float64:
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return value == 0
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case bool:
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return value == false
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case string:
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return value == ""
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case []byte:
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return len(value) == 0
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default:
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// Finally using reflect.
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rv := reflect.ValueOf(value)
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switch rv.Kind() {
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case reflect.Chan,
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reflect.Map,
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reflect.Slice,
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reflect.Array:
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return rv.Len() == 0
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case reflect.Func,
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reflect.Ptr,
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reflect.Interface,
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reflect.UnsafePointer:
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if rv.IsNil() {
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return true
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}
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}
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}
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return false
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}
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