Re: inline declaration for FLET and LABELS

["Rodney A. Brooks" <BROOKS%OZ.AI.MIT.EDU@XX.LCS.MIT.EDU>]

  The problem is that when you expand an FLET'ed or LABELS'ed function,
  you have to 'fool' somebody by backing up the lexical environment
  correctly.  Consider this contoration:
	(compiler-let ((*foo* 'foo))
	  (macrolet ((foo () `'(outer ,*foo*)))
	    (flet ((foo1 () (foo)))
	      (flet ((foo2 () (foo1)))
		(declare (inline foo2))
		(compiler-let ((*foo* 'bar))
		  (macrolet ((foo () `'(inner ,*foo*)))
		    (flet ((foo1 () (foo)))
		      (foo2))))))))
  This is supposed to return (OUTER FOO).  If the call to FOO2 were
  expanded into FOO1 but the environment were not unrolled, it would
  instead return (INNER BAR).  I'm not saying it is impossible; I'm saying
  it is probably damn hard to implement.

Correct. It is hard but not impossible. For Lucid's compiler this was
one of three places (the other two were to do with shared environments
for closures) I had to introduce variations on source level special
forms during alphatization that are not available at user level.
Basically I alphatize the body of the flet defined function in the
environment where it is defined, and then for inline susbstitution
protect it from re-alphatization with an extension to locally.
Alphatization uniquifies everything so eventually all the references
are right.

(I'm not sure this is yet in any released version but will be soon.)
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