What library functionality would you most like to see in D?

[Walter Bright]

On 7/31/2011 6:29 PM, Johann MacDonagh wrote:
> Basically, you give it some string (string, wstring, or dstring), and it gives
> you a range of tokens back. The token has the type, a slice of the input that
> corresponds to the token, line / column, and a value (e.g. an integer constant).

I suggest making the input a range.