auto foo(S s)
        static foreach(k, p; [s, this])
                for(int i = 0; i < p.length; i++)

The idea is to provide single for loop structure for each of the variables(in this case s and this).

The is to avoid string mixins which are pathetic for this kind of work.

The point is that instead of having to do

                for(int i = 0; i < s.length; i++)
                for(int i = 0; i < this.length; i++)

in which case ... might be very long.

Sure one can create a function and all that mess but the compiler should be able to do symbol replacement very naturally and easily.

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