comments before preprocessor directives

[Henry Spencer]

> what is an ansi compliant c preprocessor supposed to do with
> 	#/*foo*/define	x y
> or
> 	/*foo*/#define	x y

X3J11 sayeth that comments vanish (more precisely, turn into a single space)
before preprocessor directives are even thought about.  Also that white space
may occur before or after the #.  So the two examples above are equivalent
and define x to be y.
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