Re: Proposal for SentinelInputRange

[Walter Bright]

On 2/28/2013 10:12 AM, deadalnix wrote:
On Thursday, 28 February 2013 at 17:00:51 UTC, Walter Bright wrote:
On 2/28/2013 6:31 AM, Steven Schveighoffer wrote:
If this doesn't translate to the same code, I don't know why not.

Try it and see with your favorite C compiler.

Then try the lookahead cases I also posted.

You are being stubborn here.

You claim that this is significantly faster, but give no numbers.
You claim that the compiler can't do some optimization, when LLVM does it 
already.

I didn't say can't, I said didn't. llvm handles that case (which does surprise 
me), dmc, gcc, and vc do not. Furthermore, I'll say "cannot" on this:

            case '|':
                p++;
                if (*p == '=')
                {   p++;
                    t->value = TOKorass;
                }
                else if (*p == '|')
                {   p++;
                    t->value = TOKoror;
                }
                else
                    t->value = TOKor;
                return;