Rant after trying Rust a bit

[Andre Kostur via Digitalmars-d]

On 2015-07-22 3:35 PM, John Colvin wrote:
> On Wednesday, 22 July 2015 at 21:36:58 UTC, jmh530 wrote:
>> On Wednesday, 22 July 2015 at 20:43:04 UTC, simendsjo wrote:
>>> When "everything" is an expressions, you can write things like
>>>     auto a = if(e) c else d;
>>>
>>> In D you have to write
>>>     type a = invalid_value;
>>>     if(e) a = c;
>>>     else  a = d;
>>>     assert(a != invalid_value);
>>>
>>
>>
>> I prefer this example from one of the various Rust tutorials
>>
>> let foo = if x == 5 {
>>                 "five"
>>           }
>>           else if x == 6 {
>>                 "six"
>>           }
>>           else {
>>                 "neither"
>>           }
>>
>> You're basically using a conditional expression as an rvalue. You can
>> do the same thing with a { } block.
>
> Admittedly nowhere near as clean, but if you can bear to see the
> "return"s, function literals can turn any bunch of code in to an
> expression:
>
> auto foo = { if(x == 5)
>                           return "five";
>                       else if(x == 6)
>                           return "six";
>                       else
>                           return "neither";
>                     }();
>
> or of course there's the perhaps overly terse (brackets optional, i like
> them to visually group the condition with the ? ):
>
> auto foo = (x == 5)? "five"
>                     : (x == 6)? "six"
>                     : "neither";


Shouldn't that be its own function anyway?  If you needed it in one 
place, you'll probably need it elsewhere.  And, in this case, it can 
even be marked as pure.