Can you shrink it further?

[Lurker via Digitalmars-d]

On Tuesday, 11 October 2016 at 03:00:45 UTC, Stefan Koch wrote:
> On Tuesday, 11 October 2016 at 02:48:22 UTC, Andrei 
> Alexandrescu wrote:
>> That looks good. I'm just worried about the jump forward - 
>> ideally the case c < 127 would simply entail a quick return. I 
>> tried a fix, but it didn't do what I wanted in ldc. We 
>> shouldn't assert(0) if wrong - just skip one byte. Also, are 
>> we right to not worry about 5- and 6-byte sequences? The docs 
>> keep on threatening with it, and then immediately mention 
>> those are not valid.
>>
>> [ ... ]
>>
>> Andrei
>>
>
> If you want to skip a byte it's easy to do as well.
>
> void popFront3(ref char[] s) @trusted pure nothrow {
>    immutable c = s[0];
>    uint char_length = 1;
>    if (c < 127)
>    {
>    Lend :
>      s = s.ptr[char_length .. s.length];
>    } else {
>      if ((c & b01100_0000) == 0b1000_0000)
>      {
>        //just skip one in case this is not the beginning of a 
> code-point char
>        goto Lend;
>      }
>      if (c < 192)
>      {
>        char_length = 2;
>        goto Lend;
>      }
>      if (c < 240)
>      {
>        char_length = 3;
>        goto Lend;
>      }
>      if (c < 248)
>      {
>        char_length = 4;
>        goto Lend;
>      }
>    }
>  }

Pardon me asking, but why all these gotos instead of else ifs:

   if (c < 192)
   {
     char_length = 2;
   }
   else if (c < 240)
   {
     char_length = 3;
   } else if (...) {
   }

Does it have any effect on generated code (I don't think it 
should)?