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peval comment & reindentation

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* module/language/tree-il/optimize.scm (peval): Add a comment regarding
  failure modes, and reindent one clause.
This commit is contained in:
Andy Wingo 2011-09-21 08:50:45 +02:00
parent 9581febbb0
commit 40bd6a7e57
1 changed files with 9 additions and 3 deletions
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12
module/language/tree-il/optimize.scm
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@ -450,8 +450,8 @@ it does not handle <fix> and <let-values>, it should be called before
(let* ((vals* (map (cut loop <> env calls) vals))
(vals (map maybe-unconst vals vals*))
(body* (loop body
(fold vhash-consq env gensyms vals)
calls))
(fold vhash-consq env gensyms vals)
calls))
(body (maybe-unconst body body*)))
(if (const? body*)
body
@ -592,7 +592,13 @@ it does not handle <fix> and <let-values>, it should be called before
(($ <lambda>)
app)
(($ <toplevel-ref>)
app))
app)
;; In practice, this is the clause that stops peval:
;; module-ref applications (produced by macros,
;; typically) don't match, and so this throws,
;; aborting peval for an entire expression.
)
app)))
(($ <lambda> src meta body)