The best way to compare floating point values.

[Jack Applegame via Digitalmars-d-learn]

I wrote this function for comparing two floating point values:

import std.math;
import std.traits;

bool isEqual(T)(T v1, T v2) if(isFloatingPoint!T) {
  return T.mant_dig - feqrel(v1, v2) < 2;
}

What do you think about it?