Today's programming challenge - How's your Range-Fu ?

[Walter Bright via Digitalmars-d]

On 4/18/2015 11:29 AM, H. S. Teoh via Digitalmars-d wrote:
> On Sat, Apr 18, 2015 at 10:53:04AM -0700, Walter Bright via Digitalmars-d wrote:
>> On 4/18/2015 6:27 AM, H. S. Teoh via Digitalmars-d wrote:
>>> One possible solution would be to modify std.uni.graphemeStride to
>>> not allocate, since it shouldn't need to do so just to compute the
>>> length of the next grapheme.
>>
>> That should be done. There should be a fixed maximum codepoint count
>> to graphemeStride.
>
> Why? Scanning a string for a grapheme of arbitrary length does not need
> allocation since you're just reading data. Unless there is some required
> intermediate representation that I'm not aware of?

If there's no need for allocation at all, why does it allocate? This should be 
fixed.