case
expressions of switch
code blocks (in Go toolchain v1.20 - v1.23.x)package main
import "fmt"
func main() {
x := make(chan struct{})
var y <-chan struct{} = x
switch x {
case y: fmt.Print(1)
default: fmt.Print(0)
}
switch y {
case x: fmt.Print(1)
default: fmt.Print(0)
}
fmt.Println(x == y)
}
11true
. But it prints 01true
with Go toolchain versions from v1.20 to v1.23.x.
$ gotv 1.19. run aa.go [Run]: $HOME/.cache/gotv/tag_go1.19.13/bin/go run example.go 11true $ gotv 1.20 run aa.go [Run]: $HOME/.cache/gotv/tag_go1.20/bin/go run example.go 01true $ gotv 1.21. run aa.go [Run]: $HOME/.cache/gotv/tag_go1.21.12/bin/go run example.go 01true $ gotv 1.22. run aa.go [Run]: $HOME/.cache/gotv/tag_go1.22.5/bin/go run example.go 01true $ gotv 1.23. run aa.go [Run]: $HOME/.cache/gotv/tag_go1.23rc1/bin/go run example.go 01true $ gotv :tip run aa.go [Run]: $HOME/.cache/gotv/bra_master/bin/go run example.go 11true
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case
expressions of switch
code blocks (in Go toolchain v1.20 - v1.23.x)