Re: bootstrap problem with union Lisp_Object

[Stefan Monnier]

>> The argument of *any* macro should be free of side effects.
> Not necessarily.

Like everything, there are exceptions, of course.  But then people who come
and want to change the macro suffer.  I know because I've added an `eassert
(INTEGERP (x))' to the XINT macro (as you may have noticed by looking at
some of the commits I've done a while back).

So please, just move side effects out of macro arguments, even if they don't
hurt with the current definition of the macro.

> Making macros safe on side effects is usually not hard,

Try it with asserts (and without GCC extensions, of course).


        Stefan