Switch: Case Range Syntax

[Jacob Carlborg]

On 2011-08-17 21:58, Timon Gehr wrote:
> On 08/17/2011 09:35 PM, Jacob Carlborg wrote:
>> D should have a built-in range type. One that supports syntax for both
>> including and excluding the last element:
>>
>> auto a = 3 .. 5
>> auto b = 3 ... 5
>>
>> Then we wouldn't need a special range syntax for switch statements. You
>> could store ranges in variables and pass them to functions. opSlice
>> probably wouldn't be needed, instead opIndex could be used and you would
>> declare the method to take a range instead of two integers.
>>
>
> The .. 'operator' is the operator with the lowest precedence in D (it
> binds even less strongly than ?:), so there is no way auto a = 3 .. 5
> can ever work without a breaking language change.

I don't see either how this could be changed without a breaking language 
change.

> But again, 'case range:' matches 'range', not each individual element of
> 'range' so you'd actually still need a special range syntax for case
> statements.
>

Wouldn't that depend on how it's implemented.

-- 
/Jacob Carlborg