template bug?

[Marius Muja]

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)

Denton Cockburn wrote:
> In DMD 2.011
> 
> import std.stdio;
> 
> template factorial(real n)
> {
> 	static if (n == 1)
> 		const factorial = 1;
> 	else const factorial = n * factorial!(n - 1);
> }
> 
> void main()
> {
> 	writefln(factorial!(5));
> }
> 
> produces: -3.10504e+231
> 
> when the template is changed to accept an int instead of a real, it
> produces the right output: 120
> 
> What's the cause of this?
> 
> Note: in 1.027, the version accepting a real still produces the correct
> output of 120.