template bug?

[Denton Cockburn]

On Fri, 29 Feb 2008 10:46:23 -0800, Marius Muja wrote:

> Because of the nature of floating point numbers, you shouldn't use 
> equality(==) to compare floating point numbers.
> 
> Instead of n==1 you should write something like abs(n-1)<eps (where eps 
> is a small number)
> 

That wouldn't explain why it works in 1.027 and not 2.011.

The next thing, it doesn't explain why:

template factorial(real n)
{
	static if (n == 1.0L)
		const real factorial = 1.0L;
	else
		const real factorial = 5.0L;
}

void main()
{
	writefln(factorial!(5.0L));
}

which is using full real comparisons, and in either case should execute
the else even if it doesn't equate, produces an output of -1.49167e-154. 
1.027 produces the correct output of 5 again.

P.S.  Isn't that how == is defined for floating point numbers already?  If
not, shouldn't it be that way?