Foreach problem

[Tim M]

On Sun, 11 Jan 2009 19:56:55 +1300, Denis Koroskin <2korden at gmail.com>  
wrote:

> On Sun, 11 Jan 2009 06:04:01 +0300, Tim M <a at b.com> wrote:
>
>> On Sun, 11 Jan 2009 15:59:26 +1300, Tim M <a at b.com> wrote:
>>
>>> On Sun, 11 Jan 2009 15:50:54 +1300, Daniel Keep  
>>> <daniel.keep.lists at gmail.com> wrote:
>>>
>>>>
>>>>
>>>> Tim M wrote:
>>>>>  Why is this an error. Dmd wants to make sure that I declare a new  
>>>>> variable in the foreach statement and not use an existing one?
>>>>>  module test;
>>>>>  void main()
>>>>> {
>>>>>     int i;
>>>>>     int[] nums;
>>>>>     foreach(i; nums)
>>>>>     {
>>>>>         //
>>>>>     }
>>>>> }
>>>>>   dmd test.d
>>>>>  test.d(7): Error: shadowing declaration test.main.i is deprecated
>>>>
>>>> Yes; as the error states, you're not allowed to define variables with  
>>>> the same name as variables in an enclosing scope any more.
>>>>
>>>>    -- Daniel
>>>
>>> Why does it still work for some objects?
>>
>>
>> This works:
>>
>>
>> module test;
>>
>> class A
>> {
>> 	this()
>> 	{
>> 		//
>> 	}
>> }
>>
>> class B
>> {
>> 	this()
>> 	{
>> 		//
>> 	}
>>   	int opApply (int delegate (inout B) dg)
>>          {
>>                  return 1;
>>          }
>> }
>>
>> void main()
>> {
>> 	A a;
>> 	B b;
>> 	foreach(a; b)
>> 	{
>> 		//
>> 	}
>> }
>>
>
> It is a bug and should be reported.
>


Yep that probibly is a slight bug. What I would like to know is why cant I  
do foreach with primitive types like I can with objects. The objects use  
an existing variable but an int would require a new int defined with the  
foreach params.