public override bool VisitInt64(Expression exp, Unit input)
{
Int64 value;
if (Decoder.TryValueOf(exp, ExpressionType.Int64, out value) && Rational.CanRepresentExactly(value))
{
result = Rational.For(value);
hasValue = true;
}
return(hasValue);
}
public override Interval For(long value)
{
if (Rational.CanRepresentExactly(value))
{
return(Interval.For(Rational.For(value)));
}
else if (value >= 0) // of course it will never be zero, it is just to shut up the compiler
{
return(Interval.For(1, Rational.PlusInfinity));
}
else
{
return(Interval.For(Rational.MinusInfinity, -1));
}
}
