foreach and filter

[Jakob Ovrum]

On Wednesday, 11 April 2012 at 16:33:42 UTC, Simen Kjaeraas wrote:
> On Wed, 11 Apr 2012 18:08:14 +0200, Russel Winder 
> <russel at winder.org.uk> wrote:
>
>> Doing something along the lines of:
>>
>> 	const a = array ( filter! ... ) ;
>> 	foreach ( i ; a ) { ... }
>>
>> works fine.  Question 1 though is why I can't use immutable 
>> here, why I
>> have to use const.  Question 2 is why I can't do:
>>
>> 	const a = filter! ... ;
>> 	foreach ( i ; a ) { ... }
>
> The answer to #1 is easy. Nothing is implicitly castable to 
> immutable.

Value types with no indirection are implicitly convertible to 
immutable.

-----------
void main()
{
     int a = 2;
     immutable int b = a;
}
-----------