Timon Gehr:

    assert(S(1)<S(2)); // passes. ok.
    assert(S(int.min)>S(int.max)); // passes. oops.

A possible solution is to add to Phobos (unless it's already there) a variadic templated funcion cmpBuilder() that accepts an even number of arguments, that are seen as pairs. Usage example:

struct Foo {
  int x, y;
  string s;
  int opCmp(in ref Foo r) {
    return cmpBuilder(x, r.x, y.abs, r.y.abs, s, r.s);
  }
}

Is this worth adding to Phobos?

Bye,
bearophile

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