bool2int golang unsafe trick

bool2int.go

// https://stackoverflow.com/a/51097467/1011695

package main

import (
    "fmt"
    "unsafe"
)

func main() {
    fmt.Println(bool2int(true))
    fmt.Println(bool2int(false))
}

func bool2int(a bool) uint64 {
    return *(*uint64)(unsafe.Pointer(&a))&1
}