🚀 go-pugleaf

hrubin@pop.stat.purdue.edu (Herman Rubin) writes:

>The expression use_double(...), as
>I intend it, means that the bit pattern, or concatenated bit pattern, 
>described in the parentheses is to be now used as a double number in
>any application.  Therefore, in   process(use_double(...)), process just
>assumes that what is presented to it is a double, just as the cast to
>double declares that the result is double.

I don't know why I bother, but here it is anyway...

In Gnu C:
	#define use_double(var) ({ \
		union { typeof(var) old; double new; } tmp; \
		tmp.old = var; \
		tmp.new \
	})

In C++:
	template<class T>
	double use_double(T var) {
		union { T old; double new; } tmp;
		tmp.old = var;
		return tmp.new
	}

Satisfied, Mr. Rubin?

-- 
Fergus Henderson             fjh@munta.cs.mu.OZ.AU      
This .signature virus is a self-referential statement that is true - but 
you will only be able to consistently believe it if you copy it to your own
.signature file!