Какую версию Go вы используете (go version)?
$ go version
1.13
Воспроизводится ли эта проблема в последнем выпуске?
да
Какая операционная системаи архитектуру процессора вы используете (go env)?
go env Вывод
$ go env
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GONOPROXY=""
GONOSUMDB=""
GOOS="darwin"
GOPATH="/Users/chezixin/go"
GOPRIVATE=""
GOPROXY="https://goproxy.io"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/Users/chezixin/go/src/go.mod"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/mr/_x323k891dq9yvmvlgwqf4f40000gn/T/go-build490011880=/tmp/go-build -gno-record-gcc-switches -fno-common"
Что вы делали?
package main
import "fmt"
type T struct {
Name string
Port int
State State
}
type State int
const (
Running State = iota
Stopped
Rebooting
Terminated
)
func (s State) String() string {
switch s {
case Running:
return "Running"
case Stopped:
return "Stopped"
case Rebooting:
return "Rebooting"
case Terminated:
return "Terminated"
default:
return "Unknown"
}
}
func main() {
t := T{Name: "example", Port: 6666}
fmt.Printf("t %+v\n", t)
}
Результат ：
t {Name:example Port:6666 State:Running}
Что вы ожидали увидеть?
Что вы видели вместо этого?
Although the string is rewritten, this is related to State.const.
I am printing a T struct in main. The zero value is 0.
But why do you want to display State:Running
When T.State = 0, why does the program think T.State = const.Running?
I understand this now:
String is an interface type, T.State=0, const.Running=0, the two types are the same, the value is the same, the program will think that the two are equal? Doesn't it distinguish between const and struct at the moment?
According to logic, you should distinguish between const and struct, but the program thinks they are equal. Is this a bug? Or am I getting into a misunderstanding?
Can you tell me how to understand it correctly?
thank you very much
Thank you