Re: Can you shrink it further?

[Andrei Alexandrescu via Digitalmars-d]

On 10/10/2016 11:00 PM, Stefan Koch wrote:

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;
     }
   }
 }

Looked at this, still seems to generate a jump forward with ldc. Also, 
why do you leave a fallthrough path? Progress needs to be made on all 
paths, otherwise we have infinite loops.


Andrei