golang实现枚举类型
描述
golang无枚举类型, 但可以借助自定义类型实现
什么是枚举类型
枚举类型是一种类型, 它的值只有有限个. 换而言之, 枚举类型=一个类型+N个离散值
go的实现, 可以自定义一个类型, 把它作为枚举类型, 然后使用该类型定义N个常量.
示例
type FormatType int
const (
FTByte FormatType = iota
FTArray
FTDefine
)
func (ft FormatType) String() string {
switch ft{
case FTByte:
return "byte"
case FTArray:
return "array"
case FTDefine:
return "define"
}
return ""
}
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