"with" still sucks + removing features + adding features
Alexander Pánek
alexander.panek at brainsware.org
Tue May 19 05:19:32 PDT 2009
Andrei Alexandrescu wrote:
> bearophile wrote:
>> Andrei Alexandrescu:
>>
>> Thank you for bringing a "real" example that gives something to work on.
>>
>>> Awful!<
>>
>> Well, one of your cases was wrong. Using the +1 at the end one of
>> those cases become:
>> case 'A' .. 'Z'+1, 'a' .. 'z'+1:
>> Instead of what you have written:
>> case 'A' .. 'Z'+1: case 'a' .. 'z'+1:
>>
>> I agree that that syntax with +1 isn't very nice looking. But the
>> advantage of +1 is that it introduces (almost) no new syntax, it's not
>> easy to miss, its meaning is easy to understand. AND you don't have to
>> remember that in a case the .. is inclusive while in foreach is
>> exclusive on the right, keeping the standard way in D to denote ranges.
>
> You don't understand. My point is not that people will dislike 'Z'+1.
> They will FORGET TO WRITE THE BLESSED +1. They'll write:
>
> case 'A' .. 'Z':
You know, Ruby solves this by introducing a “seperate” range syntax for
exclusive ranges: “...”. An inclusive range is written the same as an
exclusive range in D: “..”.
a[1 .. 2].length #=> 1 ([a[1]])
a[1 ... 2].length #=> 2 ([a[1], a[2]])
I see no reason not to include such a seperate syntax in D. “..” being
exclusive and “...” being inclusive, not the other way round as in Ruby
— see “Programmer’s Paradox” @
http://www.programmersparadox.com/2009/01/11/ruby-range-mnemonic/ .
Kind regards, Alex
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