How to get struct's members ?

[bioinfornatics via Digitalmars-d-learn]

Dear,

I would like to get struct's members and zip them with an action

as

struct A
{
  int a;
  int b;
}

std.range.zip( __traits( allmembers, A ), [(x) => x == 0, (y) =>
y > 3] );

like this i could apply an action to each field.

I tried this:
http://dpaste.dzfl.pl/747799ffa64e

but:
  tuple get by allmembers is not an input rage then i can't to use
zip
  allmembers return both fiels and method while i would like only
fields

thanks