From cd71a864ad5be13ed6ec6d046e0a2cb1087bdf94 Mon Sep 17 00:00:00 2001
From: Eduardo Julian
Date: Fri, 10 Sep 2021 01:21:23 -0400
Subject: Migrated variants to the new syntax.

---
 lux-r/source/luxc/lang/synthesis/variable.lux | 101 --------------------------
 1 file changed, 101 deletions(-)
 delete mode 100644 lux-r/source/luxc/lang/synthesis/variable.lux

(limited to 'lux-r/source/luxc/lang/synthesis')

diff --git a/lux-r/source/luxc/lang/synthesis/variable.lux b/lux-r/source/luxc/lang/synthesis/variable.lux
deleted file mode 100644
index 82478a2d6..000000000
--- a/lux-r/source/luxc/lang/synthesis/variable.lux
+++ /dev/null
@@ -1,101 +0,0 @@
-(.module:
-  lux
-  (lux (data [number]
-             (coll [list "list/" Mix<List> Monoid<List>]
-                   ["s" set])))
-  (luxc (lang ["la" analysis]
-              ["ls" synthesis]
-              ["[0]L" variable {"+" [Variable]}])))
-
-(def: (bound-vars path)
-  (-> ls.Path (List Variable))
-  (case path
-    (#ls.BindP register)
-    (list (.int register))
-
-    (^or (#ls.SeqP pre post) (#ls.AltP pre post))
-    (list/composite (bound-vars pre) (bound-vars post))
-    
-    _
-    (list)))
-
-(def: (path-bodies path)
-  (-> ls.Path (List ls.Synthesis))
-  (case path
-    (#ls.ExecP body)
-    (list body)
-
-    (#ls.SeqP pre post)
-    (path-bodies post)
-
-    (#ls.AltP pre post)
-    (list/composite (path-bodies pre) (path-bodies post))
-    
-    _
-    (list)))
-
-(def: (non-arg? arity var)
-  (-> ls.Arity Variable Bit)
-  (and (variableL.local? var)
-       (n/> arity (.nat var))))
-
-(type: Tracker
-  (s.Set Variable))
-
-(def: init-tracker
-  Tracker
-  (s.new number.Hash<Int>))
-
-(def: (unused-vars current-arity bound exprS)
-  (-> ls.Arity (List Variable) ls.Synthesis (List Variable))
-  (let [tracker (loop [exprS exprS
-                       tracker (list/mix s.has init-tracker bound)]
-                  (case exprS
-                    (#ls.Variable var)
-                    (if (non-arg? current-arity var)
-                      (s.lacks var tracker)
-                      tracker)
-                    
-                    (#ls.Variant tag last? memberS)
-                    (recur memberS tracker)
-
-                    (#ls.Tuple membersS)
-                    (list/mix recur tracker membersS)
-
-                    (#ls.Call funcS argsS)
-                    (list/mix recur (recur funcS tracker) argsS)
-                    
-                    (^or (#ls.Recur argsS)
-                         (#ls.Procedure name argsS))
-                    (list/mix recur tracker argsS)
-
-                    (#ls.Let offset inputS outputS)
-                    (|> tracker (recur inputS) (recur outputS))
-
-                    (#ls.If testS thenS elseS)
-                    (|> tracker (recur testS) (recur thenS) (recur elseS))
-
-                    (#ls.Loop offset initsS bodyS)
-                    (recur bodyS (list/mix recur tracker initsS))
-
-                    (#ls.Case inputS outputPS)
-                    (let [tracker' (list/mix s.has
-                                             (recur inputS tracker)
-                                             (bound-vars outputPS))]
-                      (list/mix recur tracker' (path-bodies outputPS)))
-
-                    (#ls.Function arity env bodyS)
-                    (list/mix s.lacks tracker env)
-
-                    _
-                    tracker
-                    ))]
-    (s.to-list tracker)))
-
-... (def: (optimize-register-use current-arity [pathS bodyS])
-...   (-> ls.Arity [ls.Path ls.Synthesis] [ls.Path ls.Synthesis])
-...   (let [bound (bound-vars pathS)
-...         unused (unused-vars current-arity bound bodyS)
-...         adjusted (adjust-vars unused bound)]
-...     [(|> pathS (clean-pattern adjusted) simplify-pattern)
-...      (clean-expression adjusted bodyS)]))
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