Proposal for SentinelInputRange

[Andrei Alexandrescu]

On 2/28/13 5:54 AM, Walter Bright wrote:
> On 2/27/2013 11:55 PM, Jonathan M Davis wrote:
>>> Again, please see how lexer.c works. I assure you, there is no double
>>> copying going on, nor is there a double test for the terminating 0.
>>
>> I know what the lexer does, and remember that it _doesn't_ operate on
>> ranges,
>> and there are subtle differences between being able to just use char* and
>> trying to handle generic ranges.
>
> Hence the need to invent SentinelInputRange.

I don't think the sentinel input range is a blocker for redoing the 
parser (with ranges) in D. This discussion has probably run its course. 
The right thing to do at this point is port the lexer and figure what 
primitives are necessary from its input.

Andrei