string-ref.go

string-ref.go

// Check generate assembler with
// go tool 6g -S src/string-ref.go
package main

import (
	"fmt"
	"unsafe"
)

func do(b []byte) {
	s := string(b)

	b[0] = 'x'
	fmt.Println(s)
}

func doref(b []byte) {
	s := *(*string)(unsafe.Pointer(&b))

	b[2] = 'y'
	fmt.Println(s)
}

func main() {
	b := []byte{'a', 'b', 'c'}

	do(b)
	doref(b)
}