On Sunday, February 28, 2021 at 8:29:51 AM UTC-5 Ian Lance Taylor wrote:
> On Sat, Feb 27, 2021 at 8:00 PM tapi...@gmail.com <tapi...@gmail.com>
> wrote:
> >
> > 1.
> >
> > func String2ByteSlice(s string) []byte {
> > return (*[^uint(0) >> 1]byte)(unsafe.Pointer(&s))[:len(s):len(s)]
> > }
>
> This doesn't do what you probably want, as &s is not the address of
> the bytes in the string.
Aha, I forgot this point.
> > 2.
> >
> > func String2ByteSlice(s string) []byte {
> > return *(*[]byte)(unsafe.Pointer(&struct{string; int}{s, len(s)}))
> > }
>
> This is more likely to work but it's not safe.
>
Why? For slice field order is undefined?
>
> Ian
>
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