在Go中,如何将myByte转换为[]字节? [英] In Go, how do I convert []myByte to []byte?
问题描述
我使用了类型myByte byte
,因为我想在逻辑上区分不同类型的字节。
我可以用 byte(myByte(1))
,
但我无法找到转换或转换切片: [] byte([] myByte {1})
失败。
这样的事情可能吗?这些位在内存中是相同的(右?),所以应该有某种方法,不需要逐字节复制到一个新对象中。
例如,没有这个作品: http://play.golang.org/p/WPhD3KufR8
$ func main(){
a: = [] myByte {1}
fmt.Print(byte(myByte(1)))// Works OK
fmt.Print([] byte([] myByte {1}))//失败:无法将[] myByte文字(类型[] myByte)转换为类型[]字节
//不能使用(type [] myByte)作为类型[]字节在函数参数
// fmt.Print(bytes.Equal(a,b))
//不能将一个(type [] myByte)转换为type [] byte
// [] byte(a)
// panic:interface conversion:interface is [] main.myByte,not [] uint8
// abyte:=(interface {}(a ))。([] byte)
}
你不能将你自己的myByte的片转换为as
但是你可以拥有自己的字节片类型,它可以转换为
a字节片:
包主
$ b $导入fmt
类型myBytes []字节
func main(){
var bs [] byte
bs = [] byte(myBytes {1,2,3})
fmt.Println(bs)
}
根据您的问题,这可能是一个不错的解决方案。
(您无法区分myBytes和字节
中的一个字节,但您的切片是类型安全的。)
I have a type myByte byte
that I use because I want to logically differentiate different kinds of bytes.
I can convert easily with byte(myByte(1))
,
but I can't find away to cast or convert an slice: []byte([]myByte{1})
fails.
Is such a thing possible? The bits are the same in memory (right?) so there should be some way, short of copying byte by byte into a new object..
For example, none of this works: http://play.golang.org/p/WPhD3KufR8
package main
type myByte byte
func main() {
a := []myByte{1}
fmt.Print(byte(myByte(1))) // Works OK
fmt.Print([]byte([]myByte{1})) // Fails: cannot convert []myByte literal (type []myByte) to type []byte
// cannot use a (type []myByte) as type []byte in function argument
// fmt.Print(bytes.Equal(a, b))
// cannot convert a (type []myByte) to type []byte
// []byte(a)
// panic: interface conversion: interface is []main.myByte, not []uint8
// abyte := (interface{}(a)).([]byte)
}
You cannot convert slices of your own myByte to a slice of byte.
But you can have your own byte-slice type which can be cast to a byte slice:
package main
import "fmt"
type myBytes []byte
func main() {
var bs []byte
bs = []byte(myBytes{1, 2, 3})
fmt.Println(bs)
}
Depending on your problem this might be a nice solution. (You cannot distinguish a byte from myBytes from a byte, but your slice is typesafe.)
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