Some quick questions

[Regan Heath]

BCS wrote:
> Reply to Márcio,
> 
>> Hi, I have some quick questions:
>>
>> (1.) Why does version 2.0 of the compiler doesn't allow changing the
>> index of a foreach loop? For example:
>>
>> ;string format = "%s";
>> ;
>> ;foreach (i, c; format) {
>> ;    if (c != '%') {
>> ;        // ...
>> ;        continue;
>> ;    }
>> ;
>> ;    switch (format[++i]) {
>> ;    case 's':
>> ;        // ...
>> ;        break;
>> ;    // ...
>> ;    }
>> ;}
> 
> every time I see the index changed my toes curl. It just seems wrong.
> 
> I'd do this:
> 
> ;string format = "%s";
> ;int next = 0;
> ;foreach (i, c; format)
> ;{
> ;    if(i != next) continue;
> ;    if (c != '%')
> ;    {
> ;        // ...
> ;        continue;
> ;    }
> ;    next = i + 1;
> ;    switch (format[next])
> ;    {
> ;    case 's':
> ;        // ...
> ;        break;
> ;    // ...
> ;    }
> ;}

I'd use a for loop.  That said it would be nice if there was a nicer way 
to do this with foreach as it's the only 'container agnostic' way of 
iterating, right?

Regan