If Statement with Declaration

[Jerry via Digitalmars-d]

So I was thinking of a way of extending if statements that have 
declarations. The following being as example of the current use 
of if statements with declarations:

     if(int* weDontPollute = someFunc())
     {
          // use weDontPollute
     }

That's great and all, but it only works by checking if the 
variable evaluates to true or false. Which is fine for a pointer 
but otherwise useless for anything else, like integers where zero 
is usually valid input (index for array). So currently the only 
way to do something like this in the language, that i've found, 
is to use a for statement.

     for(int i = someFunc(); i >= 0;)
     {
         // use i

         break;
     }

Not that ideal to use a for statement. It makes it hard to read 
and if the break condition isn't there it might very well be an 
infinite loop. So I was thinking of some sort of syntax like this:

     if(int i = someFunc(); i >= 0)
     {
         // use i
     }
Thoughts on this sort of feature?