8.9.2 c99-like fast enumeration syntax

A c99-like declaration syntax is also allowed:

       id array = ...;
     
       for (id object in array)
       {
         /* Do something with 'object'  */
       }

this is completely equivalent to:

       id array = ...;
     
       {
         id object;
         for (object in array)
         {
           /* Do something with 'object'  */
         }
       }

but can save some typing.

Note that the option -std=c99 is not required to allow this syntax in Objective-C.