Golang:给定其值的常量的名称 | 那些遇到过的问题

Chr*_*ord 8

go generate

stringer

go get golang.org/x/tools/cmd/stringer

typeconst

type TLSType uint16
const (
    TLS_RSA_WITH_RC4_128_SHA            TLSType = 0x0005
    TLS_RSA_WITH_3DES_EDE_CBC_SHA       TLSType = 0x000a
    TLS_RSA_WITH_AES_128_CBC_SHA        TLSType = 0x002f
    TLS_RSA_WITH_AES_256_CBC_SHA        TLSType = 0x0035
    TLS_ECDHE_RSA_WITH_RC4_128_SHA      TLSType = 0xc011
    TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA TLSType = 0xc012
    TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA  TLSType = 0xc013
    TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA  TLSType = 0xc014
)

然后将此行添加到您的文件中(间距很重要)

//go:generate stringer -type=TLSType

现在转到程序所在文件夹中的终端并运行

go generate

tlstype_string.gofmt.StringerTLSType

go buildgo run *.go

完整的程序看起来像这样

package main

import (
    "fmt"
)

//go:generate stringer -type=TLSType
type TLSType uint16

const (
    TLS_RSA_WITH_RC4_128_SHA            TLSType = 0x0005
    TLS_RSA_WITH_3DES_EDE_CBC_SHA       TLSType = 0x000a
    TLS_RSA_WITH_AES_128_CBC_SHA        TLSType = 0x002f
    TLS_RSA_WITH_AES_256_CBC_SHA        TLSType = 0x0035
    TLS_ECDHE_RSA_WITH_RC4_128_SHA      TLSType = 0xc011
    TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA TLSType = 0xc012
    TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA  TLSType = 0xc013
    TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA  TLSType = 0xc014
)

func main() {
    fmt.Println("This const will be printed with its name instead of its number:")
    fmt.Println(TLS_RSA_WITH_RC4_128_SHA)
    fmt.Println()
    fmt.Println("So will this one:")
    fmt.Println(TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA)
    fmt.Println()
    fmt.Println("Or maybe we want to give it a value and convert:")
    fmt.Println(TLSType(0xc011))
    fmt.Println()
    fmt.Println("No problem:")
    fmt.Println(TLSType(0xc013))
}

哪个输出

This const will be printed with its name instead of its number:
TLS_RSA_WITH_RC4_128_SHA

So will this one:
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA

Or maybe we want to give it a value and convert:
TLS_ECDHE_RSA_WITH_RC4_128_SHA

No problem:
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA

constgo generate

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