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(;module:
lux
(lux (data [maybe]
text/format
(coll [list "L/" Functor<List>])))
(luxc (lang ["ls" synthesis])
(synthesizer ["&&;" function])))
(def: #export (contains-self-reference? exprS)
(-> ls;Synthesis Bool)
(case exprS
(#ls;Variant tag last? memberS)
(contains-self-reference? memberS)
(#ls;Tuple membersS)
(list;any? contains-self-reference? membersS)
(#ls;Case inputS pathS)
(or (contains-self-reference? inputS)
(loop [pathS pathS]
(case pathS
(^or (#ls;AltP leftS rightS)
(#ls;SeqP leftS rightS))
(or (recur leftS)
(recur rightS))
(#ls;ExecP bodyS)
(contains-self-reference? bodyS)
_
false)))
(#ls;Function arity environment bodyS)
(list;any? &&function;self? environment)
(#ls;Call argsS funcS)
(or (contains-self-reference? funcS)
(list;any? contains-self-reference? argsS))
(^or (#ls;Recur argsS)
(#ls;Procedure name argsS))
(list;any? contains-self-reference? argsS)
(#ls;Variable idx)
(&&function;self? idx)
(#ls;Let register inputS bodyS)
(or (contains-self-reference? inputS)
(contains-self-reference? bodyS))
(#ls;If inputS thenS elseS)
(or (contains-self-reference? inputS)
(contains-self-reference? thenS)
(contains-self-reference? elseS))
(#ls;Loop offset argsS bodyS)
(or (list;any? contains-self-reference? argsS)
(contains-self-reference? bodyS))
_
false
))
(def: #export (reify-recursion arity exprS)
(-> Nat ls;Synthesis ls;Synthesis)
(loop [exprS exprS]
(case exprS
(#ls;Case inputS pathS)
(#ls;Case inputS
(let [reify-recursion' recur]
(loop [pathS pathS]
(case pathS
(#ls;AltP leftS rightS)
(#ls;AltP (recur leftS) (recur rightS))
(#ls;SeqP leftS rightS)
(#ls;SeqP leftS (recur rightS))
(#ls;ExecP bodyS)
(#ls;ExecP (reify-recursion' bodyS))
_
pathS))))
(^multi (#ls;Call argsS (#ls;Variable 0))
(n.= arity (list;size argsS)))
(#ls;Recur argsS)
(#ls;Call argsS (#ls;Variable var))
exprS
(#ls;Let register inputS bodyS)
(#ls;Let register inputS (recur bodyS))
(#ls;If inputS thenS elseS)
(#ls;If inputS
(recur thenS)
(recur elseS))
_
exprS
)))
(def: #export (adjust env outer-offset exprS)
(-> (List ls;Variable) ls;Register ls;Synthesis ls;Synthesis)
(let [resolve-captured (: (-> ls;Variable ls;Variable)
(function [var]
(let [idx (|> var (i.* -1) int-to-nat n.dec)]
(|> env (list;nth idx) maybe;assume))))]
(loop [exprS exprS]
(case exprS
(#ls;Variant tag last? valueS)
(#ls;Variant tag last? (recur valueS))
(#ls;Tuple members)
(#ls;Tuple (L/map recur members))
(#ls;Case inputS pathS)
(#ls;Case (recur inputS)
(let [adjust' recur]
(loop [pathS pathS]
(case pathS
(^template [<tag>]
(<tag> leftS rightS)
(<tag> (recur leftS) (recur rightS)))
([#ls;AltP]
[#ls;SeqP])
(#ls;ExecP bodyS)
(#ls;ExecP (adjust' bodyS))
_
pathS))))
(#ls;Function arity scope bodyS)
(#ls;Function arity
(L/map resolve-captured scope)
(recur bodyS))
(#ls;Call argsS funcS)
(#ls;Call (L/map recur argsS) (recur funcS))
(#ls;Recur argsS)
(#ls;Recur (L/map recur argsS))
(#ls;Procedure name argsS)
(#ls;Procedure name (L/map recur argsS))
(#ls;Variable var)
(if (&&function;captured? var)
(#ls;Variable (resolve-captured var))
(#ls;Variable (|> outer-offset nat-to-int (i.+ var))))
(#ls;Let register inputS bodyS)
(#ls;Let (n.+ outer-offset register) (recur inputS) (recur bodyS))
(#ls;If inputS thenS elseS)
(#ls;If (recur inputS) (recur thenS) (recur elseS))
(#ls;Loop inner-offset argsS bodyS)
(#ls;Loop (n.+ outer-offset inner-offset)
(L/map recur argsS)
(recur bodyS))
_
exprS
))))
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