- Migrated Scheme back-end to stdlib.

23 files changed, 1855 insertions, 105 deletions

diff --git a/stdlib/source/lux/lang.lux b/stdlib/source/lux/lang.lux
index 2259b615b..322b9f655 100644
--- a/stdlib/source/lux/lang.lux
+++ b/stdlib/source/lux/lang.lux
@@ -16,6 +16,10 @@
 (type: #export Eval
   (-> Type Code (Meta Any)))
 
+(type: #export Version Text)
+
+(def: #export version Version "0.6.0")
+
 (def: #export (fail message)
   (All [a] (-> Text (Meta a)))
   (do macro.Monad<Meta>
diff --git a/stdlib/source/lux/lang/analysis.lux b/stdlib/source/lux/lang/analysis.lux
index 0996ad1f4..6efa934d8 100644
--- a/stdlib/source/lux/lang/analysis.lux
+++ b/stdlib/source/lux/lang/analysis.lux
@@ -77,7 +77,11 @@
 
 (type: #export (Tuple a) (List a))
 
-(type: #export Application [Analysis (List Analysis)])
+(type: #export Arity Nat)
+
+(type: #export (Abstraction c) [Environment Arity c])
+
+(type: #export (Application c) [c (List c)])
 
 (def: (last? size tag)
   (-> Nat Tag Bool)
@@ -131,7 +135,7 @@
   )
 
 (def: #export (apply [func args])
-  (-> Application Analysis)
+  (-> (Application Analysis) Analysis)
   (list/fold (function (_ arg func) (#Apply arg func)) func args))
 
 (type: #export Analyser
@@ -180,7 +184,7 @@
   )
 
 (def: #export (application analysis)
-  (-> Analysis Application)
+  (-> Analysis (Application Analysis))
   (case analysis
     (#Apply head func)
     (let [[func' tail] (application func)]
diff --git a/stdlib/source/lux/lang/extension.lux b/stdlib/source/lux/lang/extension.lux
index d9eb90fc9..7edac52c3 100644
--- a/stdlib/source/lux/lang/extension.lux
+++ b/stdlib/source/lux/lang/extension.lux
@@ -4,16 +4,16 @@
                 ["ex" exception #+ exception:])
        (data ["e" error]
              [text]
-             (coll (dictionary ["dict" unordered #+ Dict])))
-       [macro])
+             (coll (dictionary ["dict" unordered #+ Dict]))))
   [// #+ Eval]
   [//compiler #+ Operation Compiler]
   [//analysis #+ Analyser]
-  [//synthesis #+ Synthesizer])
+  [//synthesis #+ Synthesizer]
+  [//translation #+ Translator])
 
 (do-template [<name>]
-  [(exception: #export (<name> {message Text})
-     message)]
+  [(exception: #export (<name> {extension Text})
+     extension)]
 
   [unknown-analysis]
   [unknown-synthesis]
@@ -27,7 +27,10 @@
   )
 
 (type: #export Analysis
-  (-> Analyser Eval (List Code) (Meta //analysis.Analysis)))
+  (-> Analyser Eval
+      (Compiler .Lux
+                (List Code)
+                //analysis.Analysis)))
 
 (type: #export Synthesis
   (-> Synthesizer
@@ -35,8 +38,11 @@
                 (List //analysis.Analysis)
                 //synthesis.Synthesis)))
 
-(type: #export Translation
-  (-> (List Code) (Meta Code)))
+(type: #export (Translation anchor code)
+  (-> (Translator anchor code)
+      (Compiler (//translation.State anchor code)
+                (List //synthesis.Synthesis)
+                code)))
 
 (type: #export Statement
   (-> (List Code) (Meta Any)))
@@ -72,14 +78,14 @@
 (do-template [<name> <type> <category> <exception>]
   [(def: #export (<name> name)
      (-> Text (Meta <type>))
-     (do macro.Monad<Meta>
+     (do //compiler.Monad<Operation>
        [extensions ..get]
        (case (dict.get name (get@ <category> extensions))
          (#.Some extension)
          (wrap extension)
 
          #.None
-         (//.throw <exception> name))))]
+         (//compiler.throw <exception> name))))]
 
   [find-analysis    Analysis    #analysis    unknown-analysis]
   [find-synthesis   Synthesis   #synthesis   unknown-synthesis]
@@ -91,25 +97,30 @@
   (All [e] (Extension e))
   (dict.new text.Hash<Text>))
 
-(do-template [<all> <type> <category>]
+(do-template [<params> <all> <state> <type> <category>]
   [(def: #export <all>
-     (Meta (Extension <type>))
+     (All <params> (Operation <state> (Extension <type>)))
      (|> ..get
-         (:: macro.Monad<Meta> map (get@ <category>))))]
-
-  [all-analyses     Analysis    #analysis]
-  [all-syntheses    Synthesis   #synthesis]
-  [all-translations Translation #translation]
-  [all-statements   Statement   #statement]
+         (:: //compiler.Monad<Operation> map (get@ <category>))))]
+
+  [[]            all-analyses     .Lux
+   Analysis    #analysis]
+  [[]            all-syntheses    //synthesis.State
+   Synthesis   #synthesis]
+  [[anchor code] all-translations (//translation.State anchor code)
+   Translation #translation]
+  [[]            all-statements   Any
+   Statement   #statement]
   )
 
 (do-template [<name> <type> <category> <exception>]
   [(def: #export (<name> name extension)
      (-> Text <type> (Meta Any))
-     (do macro.Monad<Meta>
+     (do //compiler.Monad<Operation>
        [extensions ..get
-        _ (//.assert <exception> name
-                     (not (dict.contains? name (get@ <category> extensions))))
+        _ (if (not (dict.contains? name (get@ <category> extensions)))
+            (wrap [])
+            (//compiler.throw <exception> name))
         _ (..set (update@ <category> (dict.put name extension) extensions))]
        (wrap [])))]
 
diff --git a/new-luxc/source/luxc/lang/extension/synthesis.lux b/stdlib/source/lux/lang/extension/synthesis.lux
index c48f3e3a5..c48f3e3a5 100644
--- a/new-luxc/source/luxc/lang/extension/synthesis.lux
+++ b/stdlib/source/lux/lang/extension/synthesis.lux
diff --git a/new-luxc/source/luxc/lang/extension/translation.lux b/stdlib/source/lux/lang/extension/translation.lux
index bc95ed1f4..bc95ed1f4 100644
--- a/new-luxc/source/luxc/lang/extension/translation.lux
+++ b/stdlib/source/lux/lang/extension/translation.lux
diff --git a/stdlib/source/lux/lang/host/scheme.lux b/stdlib/source/lux/lang/host/scheme.lux
new file mode 100644
index 000000000..f6e7b1834
--- /dev/null
+++ b/stdlib/source/lux/lang/host/scheme.lux
@@ -0,0 +1,302 @@
+(.module:
+  [lux #- Code' Code int or and if function cond when let]
+  (lux (control pipe)
+       (data [text]
+             text/format
+             [number]
+             (coll [list "list/" Functor<List> Fold<List>]))
+       (type abstract)))
+
+(abstract: Global' {} Any)
+(abstract: Var' {} Any)
+(abstract: Computation' {} Any)
+(abstract: (Expression' k) {} Any)
+
+(abstract: (Code' k)
+  {}
+  
+  Text
+
+  (type: #export Code (Ex [k] (Code' k)))
+  (type: #export Expression (Code' (Ex [k] (Expression' k))))
+  (type: #export Global (Code' (Expression' Global')))
+  (type: #export Computation (Code' (Expression' Computation')))
+  (type: #export Var (Code' (Expression' Var')))
+
+  (type: #export Arguments
+    {#mandatory (List Var)
+     #rest (Maybe Var)})
+
+  (def: #export code (-> Code Text) (|>> @representation))
+
+  (def: #export var (-> Text Var) (|>> @abstraction))
+
+  (def: (arguments [vars rest])
+    (-> Arguments Code)
+    (case rest
+      (#.Some rest)
+      (case vars
+        #.Nil
+        rest
+
+        _
+        (|> (format " . " (@representation rest))
+            (format (|> vars
+                        (list/map ..code)
+                        (text.join-with " ")))
+            (text.enclose ["(" ")"])
+            @abstraction))
+      
+      #.None
+      (|> vars
+          (list/map ..code)
+          (text.join-with " ")
+          (text.enclose ["(" ")"])
+          @abstraction)))
+
+  (def: #export nil
+    Computation
+    (@abstraction "'()"))
+
+  (def: #export bool
+    (-> Bool Computation)
+    (|>> (case> true "#t"
+                false "#f")
+         @abstraction))
+
+  (def: #export int
+    (-> Int Computation)
+    (|>> %i @abstraction))
+
+  (def: #export float
+    (-> Frac Computation)
+    (|>> (cond> [(f/= number.positive-infinity)]
+                [(new> "+inf.0")]
+                
+                [(f/= number.negative-infinity)]
+                [(new> "-inf.0")]
+                
+                [number.not-a-number?]
+                [(new> "+nan.0")]
+                
+                ## else
+                [%f])
+         @abstraction))
+
+  (def: #export positive-infinity Computation (..float number.positive-infinity))
+  (def: #export negative-infinity Computation (..float number.negative-infinity))
+  (def: #export not-a-number Computation (..float number.not-a-number))
+
+  (def: #export string
+    (-> Text Computation)
+    (|>> %t @abstraction))
+
+  (def: #export symbol
+    (-> Text Computation)
+    (|>> (format "'") @abstraction))
+
+  (def: #export global
+    (-> Text Global)
+    (|>> @abstraction))
+
+  (def: form
+    (-> (List Code) Text)
+    (|>> (list/map ..code)
+         (text.join-with " ")
+         (text.enclose ["(" ")"])))
+  
+  (def: #export (apply/* func args)
+    (-> Expression (List Expression) Computation)
+    (@abstraction (..form (#.Cons func args))))
+  
+  (do-template [<name> <function>]
+    [(def: #export <name>
+       (-> (List Expression) Computation)
+       (apply/* (..global <function>)))]
+
+    [vector/* "vector"]
+    [list/*   "list"]
+    )
+
+  (def: #export (apply/0 func)
+    (-> Expression Computation)
+    (..apply/* func (list)))
+
+  (do-template [<lux-name> <scheme-name>]
+    [(def: #export <lux-name> (apply/0 (..global <scheme-name>)))]
+
+    [newline/0 "newline"]
+    )
+
+  (def: #export (apply/1 func)
+    (-> Expression (-> Expression Computation))
+    (|>> (list) (..apply/* func)))
+
+  (do-template [<lux-name> <scheme-name>]
+    [(def: #export <lux-name> (apply/1 (..global <scheme-name>)))]
+
+    [exact/1 "exact"]
+    [integer->char/1 "integer->char"]
+    [number->string/1 "number->string"]
+    [string/1 "string"]
+    [length/1 "length"]
+    [values/1 "values"]
+    [null?/1 "null?"]
+    [car/1 "car"]
+    [cdr/1 "cdr"]
+    [raise/1 "raise"]
+    [error-object-message/1 "error-object-message"]
+    [make-vector/1 "make-vector"]
+    [vector-length/1 "vector-length"]
+    [not/1 "not"]
+    [string-length/1 "string-length"]
+    [string-hash/1 "string-hash"]
+    [reverse/1 "reverse"]
+    [display/1 "display"]
+    [exit/1 "exit"]
+    )
+  
+  (def: #export (apply/2 func)
+    (-> Expression (-> Expression Expression Computation))
+    (.function (_ _0 _1)
+      (..apply/* func (list _0 _1))))
+
+  (do-template [<lux-name> <scheme-name>]
+    [(def: #export <lux-name> (apply/2 (..global <scheme-name>)))]
+
+    [append/2 "append"]
+    [cons/2 "cons"]
+    [make-vector/2 "make-vector"]
+    [vector-ref/2 "vector-ref"]
+    [list-tail/2 "list-tail"]
+    [map/2 "map"]
+    [string-ref/2 "string-ref"]
+    [string-append/2 "string-append"]
+    )
+
+  (do-template [<lux-name> <scheme-name>]
+    [(def: #export (<lux-name> param subject)
+       (-> Expression Expression Computation)
+       (..apply/2 (..global <scheme-name>) subject param))]
+
+    [=/2   "="]
+    [eq?/2 "eq?"]
+    [eqv?/2 "eqv?"]
+    [</2   "<"]
+    [<=/2  "<="]
+    [>/2   ">"]
+    [>=/2  ">="]
+    [string=?/2 "string=?"]
+    [string<?/2 "string<?"]
+    [+/2   "+"]
+    [-/2   "-"]
+    [//2   "/"]
+    [*/2   "*"]
+    [expt/2 "expt"]
+    [remainder/2 "remainder"]
+    [quotient/2 "quotient"]
+    [mod/2 "mod"]
+    [arithmetic-shift/2 "arithmetic-shift"]
+    [bit-and/2 "bitwise-and"]
+    [bit-or/2 "bitwise-ior"]
+    [bit-xor/2 "bitwise-xor"]
+    )
+
+  (def: #export (apply/3 func)
+    (-> Expression (-> Expression Expression Expression Computation))
+    (.function (_ _0 _1 _2)
+      (..apply/* func (list _0 _1 _2))))
+
+  (do-template [<lux-name> <scheme-name>]
+    [(def: #export <lux-name> (apply/3 (..global <scheme-name>)))]
+
+    [substring/3 "substring"]
+    [vector-set!/3 "vector-set!"]
+    )
+
+  (def: #export (vector-copy!/5 _0 _1 _2 _3 _4)
+    (-> Expression Expression Expression Expression Expression
+        Computation)
+    (..apply/* (..global "vector-copy!")
+               (list _0 _1 _2 _3 _4)))
+  
+  (do-template [<lux-name> <scheme-name>]
+    [(def: #export <lux-name>
+       (-> (List Expression) Computation)
+       (|>> (list& (..global <scheme-name>)) ..form @abstraction))]
+
+    [or "or"]
+    [and "and"]
+    )
+
+  (do-template [<lux-name> <scheme-name> <var> <pre>]
+    [(def: #export (<lux-name> bindings body)
+       (-> (List [<var> Expression]) Expression Computation)
+       (@abstraction
+        (..form (list (..global <scheme-name>)
+                      (|> bindings
+                          (list/map (.function (_ [binding/name binding/value])
+                                      (@abstraction
+                                       (..form (list (<pre> binding/name)
+                                                     binding/value)))))
+                          ..form
+                          @abstraction)
+                      body))))]
+
+    [let           "let"           Var       .id]
+    [let*          "let*"          Var       .id]
+    [letrec        "letrec"        Var       .id]
+    [let-values    "let-values"    Arguments ..arguments]
+    [let*-values   "let*-values"   Arguments ..arguments]
+    [letrec-values "letrec-values" Arguments ..arguments]
+    )
+
+  (def: #export (if test then else)
+    (-> Expression Expression Expression Computation)
+    (@abstraction
+     (..form (list (..global "if") test then else))))
+
+  (def: #export (when test then)
+    (-> Expression Expression Computation)
+    (@abstraction
+     (..form (list (..global "when") test then))))
+
+  (def: #export (cond clauses else)
+    (-> (List [Expression Expression]) Expression Computation)
+    (|> (list/fold (.function (_ [test then] next)
+                     (if test then next))
+                   else
+                   (list.reverse clauses))
+        @representation
+        @abstraction))
+
+  (def: #export (lambda arguments body)
+    (-> Arguments Expression Computation)
+    (@abstraction
+     (..form (list (..global "lambda")
+                   (..arguments arguments)
+                   body))))
+
+  (def: #export (define name arguments body)
+    (-> Var Arguments Expression Computation)
+    (@abstraction
+     (..form (list (..global "define")
+                   (|> arguments
+                       (update@ #mandatory (|>> (#.Cons name)))
+                       ..arguments)
+                   body))))
+
+  (def: #export begin
+    (-> (List Expression) Computation)
+    (|>> (#.Cons (..global "begin")) ..form @abstraction))
+
+  (def: #export (set! name value)
+    (-> Var Expression Computation)
+    (@abstraction
+     (..form (list (..global "set!") name value))))
+
+  (def: #export (with-exception-handler handler body)
+    (-> Expression Expression Computation)
+    (@abstraction
+     (..form (list (..global "with-exception-handler") handler body))))
+  )
diff --git a/stdlib/source/lux/lang/init.lux b/stdlib/source/lux/lang/init.lux
index 9c909942e..40a7fc69c 100644
--- a/stdlib/source/lux/lang/init.lux
+++ b/stdlib/source/lux/lang/init.lux
@@ -1,10 +1,11 @@
 (.module:
   lux
+  [//]
   (// ["//." target]
       [".L" extension]
       (extension [".E" analysis]
-                 ## [".E" synthesis]
-                 ## [".E" translation]
+                 [".E" synthesis]
+                 [".E" translation]
                  ## [".E" statement]
                  )))
 
@@ -26,10 +27,6 @@
    #.var-counter +0
    #.var-bindings (list)})
 
-(type: #export Version Text)
-
-(def: #export version Version "0.6.0")
-
 (`` (def: #export info
       Info
       {#.target  (for {(~~ (static //target.common-lisp)) //target.common-lisp
@@ -41,7 +38,7 @@
                        (~~ (static //target.r))           //target.r
                        (~~ (static //target.ruby))        //target.ruby
                        (~~ (static //target.scheme))      //target.scheme})
-       #.version ..version
+       #.version //.version
        #.mode    #.Build}))
 
 (def: #export (compiler host)
@@ -57,8 +54,8 @@
    #.seed            +0
    #.scope-type-vars (list)
    #.extensions      {#extensionL.analysis analysisE.defaults
-                      #extensionL.synthesis (:!! []) ## synthesisE.defaults
-                      #extensionL.translation (:!! []) ## translationE.defaults
+                      #extensionL.synthesis synthesisE.defaults
+                      #extensionL.translation translationE.defaults
                       #extensionL.statement (:!! []) ## statementE.defaults
                       }
    #.host            host})
diff --git a/new-luxc/source/luxc/lang.lux b/stdlib/source/lux/lang/name.lux
index f02af30c5..1053eb76f 100644
--- a/new-luxc/source/luxc/lang.lux
+++ b/stdlib/source/lux/lang/name.lux
@@ -4,7 +4,7 @@
              [text]
              text/format)))
 
-(def: (normalize-char char)
+(def: (sanitize char)
   (-> Nat Text)
   (case char
     (^ (char "*")) "_ASTER_"
@@ -30,15 +30,18 @@
     (^ (char ">")) "_GT_"
     (^ (char "~")) "_TILDE_"
     (^ (char "|")) "_PIPE_"
-    _
-    (text.from-code char)))
+    _              (text.from-code char)))
 
-(def: underflow Nat (dec +0))
-
-(def: #export (normalize-name name)
+(def: #export (normalize name)
   (-> Text Text)
-  (loop [idx (dec (text.size name))
-         output ""]
-    (if (n/= underflow idx)
-      output
-      (recur (dec idx) (format (|> (text.nth idx name) maybe.assume normalize-char) output)))))
+  (let [name/size (text.size name)]
+    (loop [idx +0
+           output ""]
+      (if (n/< name/size idx)
+        (recur (inc idx)
+               (|> (text.nth idx name) maybe.assume sanitize (format output)))
+        output))))
+
+(def: #export (definition [module name])
+  (-> Ident Text)
+  (format (normalize module) "___" (normalize name)))
diff --git a/stdlib/source/lux/lang/synthesis.lux b/stdlib/source/lux/lang/synthesis.lux
index cc43ea0b3..1bf06cdd0 100644
--- a/stdlib/source/lux/lang/synthesis.lux
+++ b/stdlib/source/lux/lang/synthesis.lux
@@ -5,11 +5,9 @@
              (coll (dictionary ["dict" unordered #+ Dict]))))
   [// #+ Extension]
   [//reference #+ Register Variable Reference]
-  [//analysis #+ Environment Analysis]
+  [//analysis #+ Environment Arity Analysis]
   [//compiler #+ Operation Compiler])
 
-(type: #export Arity Nat)
-
 (type: #export Resolver (Dict Variable Variable))
 
 (type: #export State
@@ -66,8 +64,7 @@
 (type: #export (Branch s)
   (#Case s (Path' s))
   (#Let s Register s)
-  (#If s s s)
-  (#Exec s))
+  (#If s s s))
 
 (type: #export (Scope s)
   {#start Register
@@ -111,6 +108,29 @@
   [path/text #..Text]
   )
 
+(do-template [<name> <kind>]
+  [(template: #export (<name> content)
+     (.<| #..Access
+          <kind>
+          content))]
+
+  [path/side   #..Side]
+  [path/member #..Member]
+  )
+
+(do-template [<name> <kind> <side>]
+  [(template: #export (<name> content)
+     (.<| #..Access
+          <kind>
+          <side>
+          content))]
+
+  [side/left    #..Side   #.Left]
+  [side/right   #..Side   #.Right]
+  [member/left  #..Member #.Left]
+  [member/right #..Member #.Right]
+  )
+
 (do-template [<name> <tag>]
   [(template: #export (<name> content)
      (<tag> content))]
@@ -186,25 +206,34 @@
 
 (do-template [<name> <tag>]
   [(template: #export (<name> content)
-     (<| #..Reference
+     (<| #..Structure
          <tag>
          content))]
 
+  [variant #..Variant]
+  [tuple   #..Tuple]
+  )
+
+(do-template [<name> <tag>]
+  [(template: #export (<name> content)
+     (.<| #..Reference
+          <tag>
+          content))]
+
   [variable/local   //reference.local]
   [variable/foreign //reference.foreign]
   )
 
 (do-template [<name> <family> <tag>]
   [(template: #export (<name> content)
-     (<| #..Control
-         <family>
-         <tag>
-         content))]
+     (.<| #..Control
+          <family>
+          <tag>
+          content))]
 
   [branch/case          #..Branch   #..Case]
   [branch/let           #..Branch   #..Let]
   [branch/if            #..Branch   #..If]
-  [branch/exec          #..Branch   #..Exec]
 
   [loop/scope           #..Loop     #..Scope]
   [loop/recur           #..Loop     #..Recur]
diff --git a/stdlib/source/lux/lang/synthesis/case.lux b/stdlib/source/lux/lang/synthesis/case.lux
index 85065393d..b7f224168 100644
--- a/stdlib/source/lux/lang/synthesis/case.lux
+++ b/stdlib/source/lux/lang/synthesis/case.lux
@@ -126,45 +126,52 @@
   (-> //.Synthesizer Analysis Match (Operation //.State Synthesis))
   (do ///compiler.Monad<Operation>
     [inputS (synthesize^ inputA)]
-    (case [headB tailB+]
-      [[(#///analysis.Bind inputR) headB/bodyA]
-       #.Nil]
-      (case headB/bodyA
-        (^ (#///analysis.Reference (///reference.local outputR)))
-        (wrap (if (n/= inputR outputR)
-                inputS
-                (//.branch/exec inputS)))
-
-        _
-        (do @
-          [arity //.scope-arity
-           headB/bodyS (//.with-new-local
-                         (synthesize^ headB/bodyA))]
-          (wrap (//.branch/let [inputS
-                                (if (//function.nested? arity)
-                                  (n/+ (dec arity) inputR)
-                                  inputR)
-                                headB/bodyS]))))
-
-      (^or (^ [[(///analysis.pattern/bool true) thenA]
-               (list [(///analysis.pattern/bool false) elseA])])
-           (^ [[(///analysis.pattern/bool false) elseA]
-               (list [(///analysis.pattern/bool true) thenA])]))
-      (do @
-        [thenS (synthesize^ thenA)
-         elseS (synthesize^ elseA)]
-        (wrap (//.branch/if [inputS thenS elseS])))
-
-      _
-      (let [[[lastP lastA] prevsPA] (|> (#.Cons headB tailB+)
-                                        list.reverse
-                                        (case> (#.Cons [lastP lastA] prevsPA)
-                                               [[lastP lastA] prevsPA]
-
-                                               _
-                                               (undefined)))]
-        (do @
-          [lastSP (path synthesize^ lastP lastA)
-           prevsSP+ (monad.map @ (product.uncurry (path synthesize^)) prevsPA)]
-          (wrap (//.branch/case [inputS (list/fold weave lastSP prevsSP+)]))))
-      )))
+    (with-expansions [<unnecesary-let>
+                      (as-is (^multi (^ (#///analysis.Reference (///reference.local outputR)))
+                                     (n/= inputR outputR))
+                             (wrap inputS))
+
+                      <let>
+                      (as-is [[(#///analysis.Bind inputR) headB/bodyA]
+                              #.Nil]
+                             (case headB/bodyA
+                               <unnecesary-let>
+
+                               _
+                               (do @
+                                 [arity //.scope-arity
+                                  headB/bodyS (//.with-new-local
+                                                (synthesize^ headB/bodyA))]
+                                 (wrap (//.branch/let [inputS
+                                                       (if (//function.nested? arity)
+                                                         (n/+ (dec arity) inputR)
+                                                         inputR)
+                                                       headB/bodyS])))))
+
+                      <if>
+                      (as-is (^or (^ [[(///analysis.pattern/bool true) thenA]
+                                      (list [(///analysis.pattern/bool false) elseA])])
+                                  (^ [[(///analysis.pattern/bool false) elseA]
+                                      (list [(///analysis.pattern/bool true) thenA])]))
+                             (do @
+                               [thenS (synthesize^ thenA)
+                                elseS (synthesize^ elseA)]
+                               (wrap (//.branch/if [inputS thenS elseS]))))
+
+                      <case>
+                      (as-is _
+                             (let [[[lastP lastA] prevsPA] (|> (#.Cons headB tailB+)
+                                                               list.reverse
+                                                               (case> (#.Cons [lastP lastA] prevsPA)
+                                                                      [[lastP lastA] prevsPA]
+
+                                                                      _
+                                                                      (undefined)))]
+                               (do @
+                                 [lastSP (path synthesize^ lastP lastA)
+                                  prevsSP+ (monad.map @ (product.uncurry (path synthesize^)) prevsPA)]
+                                 (wrap (//.branch/case [inputS (list/fold weave lastSP prevsSP+)])))))]
+      (case [headB tailB+]
+        <let>
+        <if>
+        <case>))))
diff --git a/stdlib/source/lux/lang/synthesis/function.lux b/stdlib/source/lux/lang/synthesis/function.lux
index cc40bea4d..35b9e047e 100644
--- a/stdlib/source/lux/lang/synthesis/function.lux
+++ b/stdlib/source/lux/lang/synthesis/function.lux
@@ -10,8 +10,8 @@
                    (dictionary ["dict" unordered #+ Dict]))))
   [///reference #+ Variable]
   [///compiler #+ Operation]
-  [///analysis #+ Environment Analysis]
-  [// #+ Arity Synthesis Synthesizer]
+  [///analysis #+ Environment Arity Analysis]
+  [// #+ Synthesis Synthesizer]
   [//loop])
 
 (def: #export nested?
diff --git a/stdlib/source/lux/lang/synthesis/loop.lux b/stdlib/source/lux/lang/synthesis/loop.lux
index 6aab72213..eb57eb7ad 100644
--- a/stdlib/source/lux/lang/synthesis/loop.lux
+++ b/stdlib/source/lux/lang/synthesis/loop.lux
@@ -60,9 +60,6 @@
                  _
                  proper)))
 
-        (#//.Exec bodyS)
-        (proper? bodyS)
-
         (#//.Let inputS register bodyS)
         (and (proper? inputS)
              (proper? bodyS))
@@ -131,9 +128,6 @@
               (path-recursion recur)
               (maybe/map (|>> (#//.Case inputS) #//.Branch #//.Control)))
 
-          (#//.Exec bodyS)
-          (maybe/map (|>> //.branch/exec) (recur bodyS))
-
           (#//.Let inputS register bodyS)
           (maybe/map (|>> (#//.Let inputS register) #//.Branch #//.Control)
                      (recur bodyS))
diff --git a/stdlib/source/lux/lang/translation.lux b/stdlib/source/lux/lang/translation.lux
new file mode 100644
index 000000000..c117bc019
--- /dev/null
+++ b/stdlib/source/lux/lang/translation.lux
@@ -0,0 +1,164 @@
+(.module:
+  lux
+  (lux (control ["ex" exception #+ exception:]
+                [monad #+ do])
+       (data [maybe "maybe/" Functor<Maybe>]
+             [error #+ Error]
+             [text]
+             text/format
+             (coll [sequence #+ Sequence]
+                   (dictionary ["dict" unordered #+ Dict])))
+       (world [file #+ File]))
+  [//name]
+  [//reference #+ Register]
+  [//compiler #+ Operation Compiler]
+  [//synthesis #+ Synthesis])
+
+(do-template [<name>]
+  [(exception: #export (<name>)
+     "")]
+
+  [no-active-buffer]
+  [no-anchor]
+  )
+
+(exception: #export (cannot-interpret {message Text})
+  message)
+
+(type: #export Context
+  {#scope-name Text
+   #inner-functions Nat})
+
+(sig: #export (Host code)
+  (: (-> code (Error Any))
+     execute!)
+  (: (-> code (Error Any))
+     evaluate!))
+
+(type: #export (Buffer code) (Sequence [Ident code]))
+
+(type: #export (Artifacts code) (Dict File (Buffer code)))
+
+(type: #export (State anchor code)
+  {#context Context
+   #anchor (Maybe anchor)
+   #host (Host code)
+   #buffer (Maybe (Buffer code))
+   #artifacts (Artifacts code)})
+
+(type: #export (Translator anchor code)
+  (Compiler (State anchor code) Synthesis code))
+
+(def: #export (init host)
+  (All [anchor code] (-> (Host code) (..State anchor code)))
+  {#context {#scope-name ""
+             #inner-functions +0}
+   #anchor #.None
+   #host host
+   #buffer #.None
+   #artifacts (dict.new text.Hash<Text>)})
+
+(def: #export (with-context expr)
+  (All [anchor code output]
+    (-> (Operation (..State anchor code) output)
+        (Operation (..State anchor code) [Text output])))
+  (function (_ state)
+    (let [[old-scope old-inner] (get@ #context state)
+          new-scope (format old-scope "c___" (%i (.int old-inner)))]
+      (case (expr (set@ #context [new-scope +0] state))
+        (#error.Success [state' output])
+        (#error.Success [(set@ #context [old-scope (inc old-inner)] state')
+                         [new-scope output]])
+
+        (#error.Error error)
+        (#error.Error error)))))
+
+(def: #export context
+  (All [anchor code] (Operation (..State anchor code) Text))
+  (function (_ state)
+    (#error.Success [state
+                     (|> state
+                         (get@ #context)
+                         (get@ #scope-name))])))
+
+(do-template [<tag>
+              <with-declaration> <with-type> <with-value>
+              <get> <get-type> <exception>]
+  [(def: #export <with-declaration>
+     (All [anchor code output] <with-type>)
+     (function (_ body)
+       (function (_ state)
+         (case (body (set@ <tag> (#.Some <with-value>) state))
+           (#error.Success [state' output])
+           (#error.Success [(set@ <tag> (get@ <tag> state) state')
+                            output])
+
+           (#error.Error error)
+           (#error.Error error)))))
+
+   (def: #export <get>
+     (All [anchor code] (Operation (..State anchor code) <get-type>))
+     (function (_ state)
+       (case (get@ <tag> state)
+         (#.Some output)
+         (#error.Success [state output])
+
+         #.None
+         (ex.throw <exception> []))))]
+
+  [#anchor
+   (with-anchor anchor)
+   (-> anchor (Operation (..State anchor code) output)
+       (Operation (..State anchor code) output))
+   anchor
+   anchor anchor no-anchor]
+
+  [#buffer
+   with-buffer
+   (-> (Operation (..State anchor code) output)
+       (Operation (..State anchor code) output))
+   sequence.empty
+   buffer (Buffer code) no-active-buffer]
+  )
+
+(def: #export artifacts
+  (All [anchor code]
+    (Operation (..State anchor code) (Artifacts code)))
+  (function (_ state)
+    (#error.Success [state (get@ #artifacts state)])))
+
+(do-template [<name>]
+  [(def: #export (<name> code)
+     (All [anchor code]
+       (-> code (Operation (..State anchor code) Any)))
+     (function (_ state)
+       (case (:: (get@ #host state) <name> code)
+         (#error.Error error)
+         (ex.throw cannot-interpret error)
+         
+         (#error.Success output)
+         (#error.Success [state output]))))]
+
+  [execute!]
+  [evaluate!]
+  )
+
+(def: #export (save! name code)
+  (All [anchor code]
+    (-> Ident code (Operation (..State anchor code) Any)))
+  (do //compiler.Monad<Operation>
+    [_ (execute! code)]
+    (function (_ state)
+      (#error.Success [(update@ #buffer
+                                (maybe/map (sequence.add [name code]))
+                                state)
+                       []]))))
+
+(def: #export (save-buffer! target)
+  (All [anchor code]
+    (-> File (Operation (..State anchor code) Any)))
+  (do //compiler.Monad<Operation>
+    [buffer ..buffer]
+    (function (_ state)
+      (#error.Success [(update@ #artifacts (dict.put target buffer) state)
+                       []]))))
diff --git a/stdlib/source/lux/lang/translation/scheme/case.jvm.lux b/stdlib/source/lux/lang/translation/scheme/case.jvm.lux
new file mode 100644
index 000000000..e5d12a005
--- /dev/null
+++ b/stdlib/source/lux/lang/translation/scheme/case.jvm.lux
@@ -0,0 +1,170 @@
+(.module:
+  [lux #- case let if]
+  (lux (control [monad #+ do]
+                ["ex" exception #+ exception:])
+       (data [number]
+             [text]
+             text/format
+             (coll [list "list/" Functor<List> Fold<List>]
+                   (set ["set" unordered #+ Set]))))
+  (//// [reference #+ Register]
+        (host ["_" scheme #+ Expression Computation Var])
+        [compiler #+ "operation/" Monad<Operation>]
+        [synthesis #+ Synthesis Path])
+  [//runtime #+ Operation Translator]
+  [//reference])
+
+(def: #export (let translate [valueS register bodyS])
+  (-> Translator [Synthesis Register Synthesis]
+      (Operation Computation))
+  (do compiler.Monad<Operation>
+    [valueO (translate valueS)
+     bodyO (translate bodyS)]
+    (wrap (_.let (list [(//reference.local' register) valueO])
+            bodyO))))
+
+(def: #export (record-get translate valueS pathP)
+  (-> Translator Synthesis (List [Nat Bool])
+      (Operation Expression))
+  (do compiler.Monad<Operation>
+    [valueO (translate valueS)]
+    (wrap (list/fold (function (_ [idx tail?] source)
+                       (.let [method (.if tail?
+                                       //runtime.product//right
+                                       //runtime.product//left)]
+                         (method source (_.int (:! Int idx)))))
+                     valueO
+                     pathP))))
+
+(def: #export (if translate [testS thenS elseS])
+  (-> Translator [Synthesis Synthesis Synthesis]
+      (Operation Computation))
+  (do compiler.Monad<Operation>
+    [testO (translate testS)
+     thenO (translate thenS)
+     elseO (translate elseS)]
+    (wrap (_.if testO thenO elseO))))
+
+(def: @savepoint (_.var "lux_pm_cursor_savepoint"))
+
+(def: @cursor (_.var "lux_pm_cursor"))
+
+(def: top _.length/1)
+
+(def: (push! value var)
+  (-> Expression Var Computation)
+  (_.set! var (_.cons/2 value var)))
+
+(def: (pop! var)
+  (-> Var Computation)
+  (_.set! var var))
+
+(def: (push-cursor! value)
+  (-> Expression Computation)
+  (push! value @cursor))
+
+(def: save-cursor!
+  Computation
+  (push! @cursor @savepoint))
+
+(def: restore-cursor!
+  Computation
+  (_.set! @cursor (_.car/1 @savepoint)))
+
+(def: cursor-top
+  Computation
+  (_.car/1 @cursor))
+
+(def: pop-cursor!
+  Computation
+  (pop! @cursor))
+
+(def: pm-error (_.string "PM-ERROR"))
+
+(def: fail-pm! (_.raise/1 pm-error))
+
+(def: @temp (_.var "lux_pm_temp"))
+
+(exception: #export (unrecognized-path)
+  "")
+
+(def: $alt_error (_.var "alt_error"))
+
+(def: (pm-catch handler)
+  (-> Expression Computation)
+  (_.lambda [(list $alt_error) #.None]
+       (_.if (|> $alt_error (_.eqv?/2 pm-error))
+         handler
+         (_.raise/1 $alt_error))))
+
+(def: (pattern-matching' translate pathP)
+  (-> Translator Path (Operation Expression))
+  (.case pathP
+    (^ (synthesis.path/then bodyS))
+    (translate bodyS)
+
+    #synthesis.Pop
+    (operation/wrap pop-cursor!)
+
+    (#synthesis.Bind register)
+    (operation/wrap (_.define (//reference.local' register) [(list) #.None]
+                              cursor-top))
+
+    (^template [<tag> <format> <=>]
+      (^ (<tag> value))
+      (operation/wrap (_.when (|> value <format> (<=> cursor-top) _.not/1)
+                              fail-pm!)))
+    ([synthesis.path/bool _.bool   _.eqv?/2]
+     [synthesis.path/i64  _.int    _.=/2]
+     [synthesis.path/f64  _.float  _.=/2]
+     [synthesis.path/text _.string _.eqv?/2])
+
+    (^template [<pm> <flag> <prep>]
+      (^ (<pm> idx))
+      (operation/wrap (_.let (list [@temp (|> idx <prep> .int _.int (//runtime.sum//get cursor-top <flag>))])
+                        (_.if (_.null?/1 @temp)
+                          fail-pm!
+                          (push-cursor! @temp)))))
+    ([synthesis.side/left  _.nil         (<|)]
+     [synthesis.side/right (_.string "") inc])
+
+    (^template [<pm> <getter> <prep>]
+      (^ (<pm> idx))
+      (operation/wrap (|> idx <prep> .int _.int (<getter> cursor-top) push-cursor!)))
+    ([synthesis.member/left  //runtime.product//left  (<|)]
+     [synthesis.member/right //runtime.product//right inc])
+
+    (^template [<tag> <computation>]
+      (^ (<tag> [leftP rightP]))
+      (do compiler.Monad<Operation>
+        [leftO (pattern-matching' translate leftP)
+         rightO (pattern-matching' translate rightP)]
+        (wrap <computation>)))
+    ([synthesis.path/seq (_.begin (list leftO
+                                        rightO))]
+     [synthesis.path/alt (_.with-exception-handler
+                           (pm-catch (_.begin (list restore-cursor!
+                                                    rightO)))
+                           (_.lambda [(list) #.None]
+                                (_.begin (list save-cursor!
+                                               leftO))))])
+    
+    _
+    (compiler.throw unrecognized-path [])))
+
+(def: (pattern-matching translate pathP)
+  (-> Translator Path (Operation Computation))
+  (do compiler.Monad<Operation>
+    [pattern-matching! (pattern-matching' translate pathP)]
+    (wrap (_.with-exception-handler
+            (pm-catch (_.raise/1 (_.string "Invalid expression for pattern-matching.")))
+            (_.lambda [(list) #.None]
+                 pattern-matching!)))))
+
+(def: #export (case translate [valueS pathP])
+  (-> Translator [Synthesis Path] (Operation Computation))
+  (do compiler.Monad<Operation>
+    [valueO (translate valueS)]
+    (<| (:: @ map (_.let (list [@cursor (_.list/* (list valueO))]
+                               [@savepoint (_.list/* (list))])))
+        (pattern-matching translate pathP))))
diff --git a/stdlib/source/lux/lang/translation/scheme/expression.jvm.lux b/stdlib/source/lux/lang/translation/scheme/expression.jvm.lux
new file mode 100644
index 000000000..96bb17126
--- /dev/null
+++ b/stdlib/source/lux/lang/translation/scheme/expression.jvm.lux
@@ -0,0 +1,53 @@
+(.module:
+  lux
+  (lux (control [monad #+ do]))
+  (//// [compiler]
+        [synthesis]
+        [extension])
+  [//runtime #+ Translator]
+  [//primitive]
+  [//structure]
+  [//reference]
+  [//function]
+  [//case])
+
+(def: #export (translate synthesis)
+  Translator
+  (case synthesis
+    (^template [<tag> <generator>]
+      (^ (<tag> value))
+      (<generator> value))
+    ([synthesis.bool //primitive.bool]
+     [synthesis.i64  //primitive.i64]
+     [synthesis.f64  //primitive.f64]
+     [synthesis.text //primitive.text])
+
+    (^ (synthesis.variant variantS))
+    (//structure.variant translate variantS)
+
+    (^ (synthesis.tuple members))
+    (//structure.tuple translate members)
+
+    (#synthesis.Reference reference)
+    (//reference.reference reference)
+
+    (^ (synthesis.function/apply application))
+    (//function.apply translate application)
+
+    (^ (synthesis.function/abstraction abstraction))
+    (//function.function translate abstraction)
+
+    (^ (synthesis.branch/case case))
+    (//case.case translate case)
+
+    (^ (synthesis.branch/let let))
+    (//case.let translate let)
+
+    (^ (synthesis.branch/if if))
+    (//case.if translate if)
+
+    (#synthesis.Extension [extension argsS])
+    (do compiler.Monad<Operation>
+      [extension (extension.find-translation extension)]
+      (extension argsS))
+    ))
diff --git a/stdlib/source/lux/lang/translation/scheme/extension.jvm.lux b/stdlib/source/lux/lang/translation/scheme/extension.jvm.lux
new file mode 100644
index 000000000..6475caf68
--- /dev/null
+++ b/stdlib/source/lux/lang/translation/scheme/extension.jvm.lux
@@ -0,0 +1,32 @@
+(.module:
+  lux
+  (lux (control [monad #+ do]
+                ["ex" exception #+ exception:])
+       (data [maybe]
+             text/format
+             (coll (dictionary ["dict" unordered #+ Dict]))))
+  (//// [reference #+ Register Variable]
+        (host ["_" scheme #+ Computation])
+        [compiler "operation/" Monad<Operation>]
+        [synthesis #+ Synthesis])
+  [//runtime #+ Operation Translator]
+  [/common]
+  ## [/host]
+  )
+
+(exception: #export (unknown-extension {message Text})
+  message)
+
+(def: extensions
+  /common.Bundle
+  (|> /common.extensions
+      ## (dict.merge /host.extensions)
+      ))
+
+(def: #export (extension translate name args)
+  (-> Translator Text (List Synthesis)
+      (Operation Computation))
+  (<| (maybe.default (compiler.throw unknown-extension (%t name)))
+      (do maybe.Monad<Maybe>
+        [ext (dict.get name extensions)]
+        (wrap (ext translate args)))))
diff --git a/stdlib/source/lux/lang/translation/scheme/extension/common.jvm.lux b/stdlib/source/lux/lang/translation/scheme/extension/common.jvm.lux
new file mode 100644
index 000000000..140045aaf
--- /dev/null
+++ b/stdlib/source/lux/lang/translation/scheme/extension/common.jvm.lux
@@ -0,0 +1,389 @@
+(.module:
+  lux
+  (lux (control [monad #+ do]
+                ["ex" exception #+ exception:])
+       (data ["e" error]
+             [product]
+             [text]
+             text/format
+             [number #+ hex]
+             (coll [list "list/" Functor<List>]
+                   (dictionary ["dict" unordered #+ Dict])))
+       [macro #+ with-gensyms]
+       (macro [code]
+              ["s" syntax #+ syntax:])
+       [host])
+  (///// (host ["_" scheme #+ Expression Computation])
+         [compiler]
+         [synthesis #+ Synthesis])
+  [///runtime #+ Operation Translator])
+
+## [Types]
+(type: #export Extension
+  (-> Translator (List Synthesis) (Operation Computation)))
+
+(type: #export Bundle
+  (Dict Text Extension))
+
+(syntax: (Vector {size s.nat} elemT)
+  (wrap (list (` [(~+ (list.repeat size elemT))]))))
+
+(type: #export Nullary (-> (Vector +0 Expression) Computation))
+(type: #export Unary   (-> (Vector +1 Expression) Computation))
+(type: #export Binary  (-> (Vector +2 Expression) Computation))
+(type: #export Trinary (-> (Vector +3 Expression) Computation))
+(type: #export Variadic (-> (List Expression) Computation))
+
+## [Utils]
+(def: #export (install name unnamed)
+  (-> Text (-> Text Extension)
+      (-> Bundle Bundle))
+  (dict.put name (unnamed name)))
+
+(def: #export (prefix prefix bundle)
+  (-> Text Bundle Bundle)
+  (|> bundle
+      dict.entries
+      (list/map (function (_ [key val]) [(format prefix " " key) val]))
+      (dict.from-list text.Hash<Text>)))
+
+(exception: #export (wrong-arity {extension Text} {expected Nat} {actual Nat})
+  (ex.report ["Extension" (%t extension)]
+             ["Expected" (|> expected .int %i)]
+             ["Actual" (|> actual .int %i)]))
+
+(syntax: (arity: {name s.local-symbol} {arity s.nat})
+  (with-gensyms [g!_ g!extension g!name g!translate g!inputs]
+    (do @
+      [g!input+ (monad.seq @ (list.repeat arity (macro.gensym "input")))]
+      (wrap (list (` (def: #export ((~ (code.local-symbol name)) (~ g!extension))
+                       (-> (-> (..Vector (~ (code.nat arity)) Expression) Computation)
+                           (-> Text ..Extension))
+                       (function ((~ g!_) (~ g!name))
+                         (function ((~ g!_) (~ g!translate) (~ g!inputs))
+                           (case (~ g!inputs)
+                             (^ (list (~+ g!input+)))
+                             (do compiler.Monad<Operation>
+                               [(~+ (|> g!input+
+                                        (list/map (function (_ g!input)
+                                                    (list g!input (` ((~ g!translate) (~ g!input))))))
+                                        list.concat))]
+                               ((~' wrap) ((~ g!extension) [(~+ g!input+)])))
+
+                             (~' _)
+                             (compiler.throw wrong-arity [(~ g!name) +1 (list.size (~ g!inputs))])))))))))))
+
+(arity: nullary +0)
+(arity: unary +1)
+(arity: binary +2)
+(arity: trinary +3)
+
+(def: #export (variadic extension)
+  (-> Variadic (-> Text Extension))
+  (function (_ extension-name)
+    (function (_ translate inputsS)
+      (do compiler.Monad<Operation>
+        [inputsI (monad.map @ translate inputsS)]
+        (wrap (extension inputsI))))))
+
+## [Extensions]
+## [[Lux]]
+(def: extensions/lux
+  Bundle
+  (|> (dict.new text.Hash<Text>)
+      (install "is?" (binary (product.uncurry _.eq?/2)))
+      (install "try" (unary ///runtime.lux//try))))
+
+## [[Bits]]
+(do-template [<name> <op>]
+  [(def: (<name> [subjectO paramO])
+     Binary
+     (<op> paramO subjectO))]
+  
+  [bit//and _.bit-and/2]
+  [bit//or  _.bit-or/2]
+  [bit//xor _.bit-xor/2]
+  )
+
+(def: (bit//left-shift [subjectO paramO])
+  Binary
+  (_.arithmetic-shift/2 (_.remainder/2 (_.int 64) paramO)
+                        subjectO))
+
+(def: (bit//arithmetic-right-shift [subjectO paramO])
+  Binary
+  (_.arithmetic-shift/2 (|> paramO (_.remainder/2 (_.int 64)) (_.*/2 (_.int -1)))
+                        subjectO))
+
+(def: (bit//logical-right-shift [subjectO paramO])
+  Binary
+  (///runtime.bit//logical-right-shift (_.remainder/2 (_.int 64) paramO) subjectO))
+
+(def: extensions/bit
+  Bundle
+  (<| (prefix "bit")
+      (|> (dict.new text.Hash<Text>)
+          (install "and" (binary bit//and))
+          (install "or" (binary bit//or))
+          (install "xor" (binary bit//xor))
+          (install "left-shift" (binary bit//left-shift))
+          (install "logical-right-shift" (binary bit//logical-right-shift))
+          (install "arithmetic-right-shift" (binary bit//arithmetic-right-shift))
+          )))
+
+## [[Arrays]]
+(def: (array//new size0)
+  Unary
+  (_.make-vector/2 size0 _.nil))
+
+(def: (array//get [arrayO idxO])
+  Binary
+  (///runtime.array//get arrayO idxO))
+
+(def: (array//put [arrayO idxO elemO])
+  Trinary
+  (///runtime.array//put arrayO idxO elemO))
+
+(def: (array//remove [arrayO idxO])
+  Binary
+  (///runtime.array//put arrayO idxO _.nil))
+
+(def: extensions/array
+  Bundle
+  (<| (prefix "array")
+      (|> (dict.new text.Hash<Text>)
+          (install "new" (unary array//new))
+          (install "get" (binary array//get))
+          (install "put" (trinary array//put))
+          (install "remove" (binary array//remove))
+          (install "size" (unary _.vector-length/1))
+          )))
+
+## [[Numbers]]
+(host.import java/lang/Double
+  (#static MIN_VALUE Double)
+  (#static MAX_VALUE Double))
+
+(do-template [<name> <const> <encode>]
+  [(def: (<name> _)
+     Nullary
+     (<encode> <const>))]
+
+  [frac//smallest Double::MIN_VALUE            _.float]
+  [frac//min      (f/* -1.0 Double::MAX_VALUE) _.float]
+  [frac//max      Double::MAX_VALUE            _.float]
+  )
+
+(do-template [<name> <frac>]
+  [(def: (<name> _)
+     Nullary
+     (_.float <frac>))]
+
+  [frac//not-a-number      number.not-a-number]
+  [frac//positive-infinity number.positive-infinity]
+  [frac//negative-infinity number.negative-infinity]
+  )
+
+(do-template [<name> <op>]
+  [(def: (<name> [subjectO paramO])
+     Binary
+     (|> subjectO (<op> paramO)))]
+
+  [int//+ _.+/2]
+  [int//- _.-/2]
+  [int//* _.*/2]
+  [int/// _.quotient/2]
+  [int//% _.remainder/2]
+  )
+
+(do-template [<name> <op>]
+  [(def: (<name> [subjectO paramO])
+     Binary
+     (<op> paramO subjectO))]
+
+  [frac//+ _.+/2]
+  [frac//- _.-/2]
+  [frac//* _.*/2]
+  [frac/// _.//2]
+  [frac//% _.mod/2]
+  [frac//= _.=/2]
+  [frac//< _.</2]
+
+  [text//= _.string=?/2]
+  [text//< _.string<?/2]
+  )
+
+(do-template [<name> <cmp>]
+  [(def: (<name> [subjectO paramO])
+     Binary
+     (<cmp> paramO subjectO))]
+
+  [int//= _.=/2]
+  [int//< _.</2]
+  )
+
+(def: int//char (|>> _.integer->char/1 _.string/1))
+
+(def: extensions/int
+  Bundle
+  (<| (prefix "int")
+      (|> (dict.new text.Hash<Text>)
+          (install "+" (binary int//+))
+          (install "-" (binary int//-))
+          (install "*" (binary int//*))
+          (install "/" (binary int///))
+          (install "%" (binary int//%))
+          (install "=" (binary int//=))
+          (install "<" (binary int//<))
+          (install "to-frac" (unary (|>> (_.//2 (_.float 1.0)))))
+          (install "char" (unary int//char)))))
+
+(def: extensions/frac
+  Bundle
+  (<| (prefix "frac")
+      (|> (dict.new text.Hash<Text>)
+          (install "+" (binary frac//+))
+          (install "-" (binary frac//-))
+          (install "*" (binary frac//*))
+          (install "/" (binary frac///))
+          (install "%" (binary frac//%))
+          (install "=" (binary frac//=))
+          (install "<" (binary frac//<))
+          (install "smallest" (nullary frac//smallest))
+          (install "min" (nullary frac//min))
+          (install "max" (nullary frac//max))
+          (install "not-a-number" (nullary frac//not-a-number))
+          (install "positive-infinity" (nullary frac//positive-infinity))
+          (install "negative-infinity" (nullary frac//negative-infinity))
+          (install "to-int" (unary _.exact/1))
+          (install "encode" (unary _.number->string/1))
+          (install "decode" (unary ///runtime.frac//decode)))))
+
+## [[Text]]
+(def: (text//char [subjectO paramO])
+  Binary
+  (_.string/1 (_.string-ref/2 subjectO paramO)))
+
+(def: (text//clip [subjectO startO endO])
+  Trinary
+  (_.substring/3 subjectO startO endO))
+
+(def: extensions/text
+  Bundle
+  (<| (prefix "text")
+      (|> (dict.new text.Hash<Text>)
+          (install "=" (binary text//=))
+          (install "<" (binary text//<))
+          (install "concat" (binary (product.uncurry _.string-append/2)))
+          (install "size" (unary _.string-length/1))
+          (install "char" (binary text//char))
+          (install "clip" (trinary text//clip)))))
+
+## [[Math]]
+(def: (math//pow [subject param])
+  Binary
+  (_.expt/2 param subject))
+
+(def: math-func
+  (-> Text Unary)
+  (|>> _.global _.apply/1))
+
+(def: extensions/math
+  Bundle
+  (<| (prefix "math")
+      (|> (dict.new text.Hash<Text>)
+          (install "cos" (unary (math-func "cos")))
+          (install "sin" (unary (math-func "sin")))
+          (install "tan" (unary (math-func "tan")))
+          (install "acos" (unary (math-func "acos")))
+          (install "asin" (unary (math-func "asin")))
+          (install "atan" (unary (math-func "atan")))
+          (install "exp" (unary (math-func "exp")))
+          (install "log" (unary (math-func "log")))
+          (install "ceil" (unary (math-func "ceiling")))
+          (install "floor" (unary (math-func "floor")))
+          (install "pow" (binary math//pow))
+          )))
+
+## [[IO]]
+(def: (io//log input)
+  Unary
+  (_.begin (list (_.display/1 input)
+                 _.newline/0)))
+
+(def: (void code)
+  (-> Expression Computation)
+  (_.begin (list code (_.string synthesis.unit))))
+
+(def: extensions/io
+  Bundle
+  (<| (prefix "io")
+      (|> (dict.new text.Hash<Text>)
+          (install "log" (unary (|>> io//log ..void)))
+          (install "error" (unary _.raise/1))
+          (install "exit" (unary _.exit/1))
+          (install "current-time" (nullary (function (_ _) (///runtime.io//current-time (_.string synthesis.unit))))))))
+
+## [[Atoms]]
+(def: atom//new
+  Unary
+  (|>> (list) _.vector/*))
+
+(def: (atom//read atom)
+  Unary
+  (_.vector-ref/2 atom (_.int 0)))
+
+(def: (atom//compare-and-swap [atomO oldO newO])
+  Trinary
+  (///runtime.atom//compare-and-swap atomO oldO newO))
+
+(def: extensions/atom
+  Bundle
+  (<| (prefix "atom")
+      (|> (dict.new text.Hash<Text>)
+          (install "new" (unary atom//new))
+          (install "read" (unary atom//read))
+          (install "compare-and-swap" (trinary atom//compare-and-swap)))))
+
+## [[Box]]
+(def: (box//write [valueO boxO])
+  Binary
+  (///runtime.box//write valueO boxO))
+
+(def: extensions/box
+  Bundle
+  (<| (prefix "box")
+      (|> (dict.new text.Hash<Text>)
+          (install "new" (unary atom//new))
+          (install "read" (unary atom//read))
+          (install "write" (binary box//write)))))
+
+## [[Processes]]
+(def: (process//parallelism-level [])
+  Nullary
+  (_.int 1))
+
+(def: extensions/process
+  Bundle
+  (<| (prefix "process")
+      (|> (dict.new text.Hash<Text>)
+          (install "parallelism-level" (nullary process//parallelism-level))
+          (install "schedule" (binary (product.uncurry ///runtime.process//schedule)))
+          )))
+
+## [Bundles]
+(def: #export extensions
+  Bundle
+  (<| (prefix "lux")
+      (|> extensions/lux
+          (dict.merge extensions/bit)
+          (dict.merge extensions/int)
+          (dict.merge extensions/frac)
+          (dict.merge extensions/text)
+          (dict.merge extensions/array)
+          (dict.merge extensions/math)
+          (dict.merge extensions/io)
+          (dict.merge extensions/atom)
+          (dict.merge extensions/box)
+          (dict.merge extensions/process)
+          )))
diff --git a/stdlib/source/lux/lang/translation/scheme/function.jvm.lux b/stdlib/source/lux/lang/translation/scheme/function.jvm.lux
new file mode 100644
index 000000000..11c64076c
--- /dev/null
+++ b/stdlib/source/lux/lang/translation/scheme/function.jvm.lux
@@ -0,0 +1,85 @@
+(.module:
+  [lux #- function]
+  (lux (control [monad #+ do]
+                pipe)
+       (data [product]
+             text/format
+             (coll [list "list/" Functor<List>])))
+  (//// [reference #+ Register Variable]
+        [name]
+        [compiler "operation/" Monad<Operation>]
+        [analysis #+ Variant Tuple Environment Arity Abstraction Application Analysis]
+        [synthesis #+ Synthesis]
+        (host ["_" scheme #+ Expression Computation Var]))
+  [///]
+  [//runtime #+ Operation Translator]
+  [//primitive]
+  [//reference])
+
+(def: #export (apply translate [functionS argsS+])
+  (-> Translator (Application Synthesis) (Operation Computation))
+  (do compiler.Monad<Operation>
+    [functionO (translate functionS)
+     argsO+ (monad.map @ translate argsS+)]
+    (wrap (_.apply/* functionO argsO+))))
+
+(def: (with-closure function-name inits function-definition)
+  (-> Text (List Expression) Computation (Operation Computation))
+  (let [@closure (_.var (format function-name "___CLOSURE"))]
+    (operation/wrap
+     (case inits
+       #.Nil
+       function-definition
+
+       _
+       (_.letrec (list [@closure
+                        (_.lambda [(|> (list.enumerate inits)
+                                  (list/map (|>> product.left //reference.foreign')))
+                              #.None]
+                             function-definition)])
+                 (_.apply/* @closure inits))))))
+
+(def: @curried (_.var "curried"))
+(def: @missing (_.var "missing"))
+
+(def: input
+  (|>> inc //reference.local'))
+
+(def: #export (function translate [environment arity bodyS])
+  (-> Translator (Abstraction Synthesis) (Operation Computation))
+  (do compiler.Monad<Operation>
+    [[function-name bodyO] (///.with-context
+                             (do @
+                               [function-name ///.context]
+                               (///.with-anchor (_.var function-name)
+                                 (translate bodyS))))
+     closureO+ (monad.map @ //reference.variable environment)
+     #let [arityO (|> arity .int _.int)
+           @num-args (_.var "num_args")
+           @function (_.var function-name)
+           apply-poly (.function (_ args func)
+                        (_.apply/2 (_.global "apply") func args))]]
+    (with-closure function-name closureO+
+      (_.letrec (list [@function (_.lambda [(list) (#.Some @curried)]
+                                      (_.let (list [@num-args (_.length/1 @curried)])
+                                        (<| (_.if (|> @num-args (_.=/2 arityO))
+                                              (<| (_.let (list [(//reference.local' +0) @function]))
+                                                  (_.let-values (list [[(|> (list.n/range +0 (dec arity))
+                                                                            (list/map ..input))
+                                                                        #.None]
+                                                                       (_.apply/2 (_.global "apply") (_.global "values") @curried)]))
+                                                  bodyO))
+                                            (_.if (|> @num-args (_.>/2 arityO))
+                                              (let [arity-args (//runtime.slice (_.int 0) arityO @curried)
+                                                    output-func-args (//runtime.slice arityO
+                                                                                      (|> @num-args (_.-/2 arityO))
+                                                                                      @curried)]
+                                                (|> @function
+                                                    (apply-poly arity-args)
+                                                    (apply-poly output-func-args))))
+                                            ## (|> @num-args (_.</2 arityO))
+                                            (_.lambda [(list) (#.Some @missing)]
+                                                 (|> @function
+                                                     (apply-poly (_.append/2 @curried @missing)))))))])
+                @function))
+    ))
diff --git a/stdlib/source/lux/lang/translation/scheme/loop.jvm.lux b/stdlib/source/lux/lang/translation/scheme/loop.jvm.lux
new file mode 100644
index 000000000..6f305336e
--- /dev/null
+++ b/stdlib/source/lux/lang/translation/scheme/loop.jvm.lux
@@ -0,0 +1,39 @@
+(.module:
+  [lux #- loop]
+  (lux (control [monad #+ do])
+       (data [product]
+             [text]
+             text/format
+             (coll [list "list/" Functor<List>]))
+       [macro])
+  [////]
+  (//// [name]
+        (host ["_" scheme #+ Computation Var])
+        [compiler "operation/" Monad<Operation>]
+        [synthesis #+ Synthesis])
+  [///]
+  [//runtime #+ Operation Translator]
+  [//reference])
+
+(def: @loop (_.var "loop"))
+
+(def: #export (loop translate offset initsS+ bodyS)
+  (-> Translator Nat (List Synthesis) Synthesis
+      (Operation Computation))
+  (do compiler.Monad<Operation>
+    [initsO+ (monad.map @ translate initsS+)
+     bodyO (///.with-anchor @loop
+             (translate bodyS))]
+    (wrap (_.letrec (list [@loop (_.lambda [(|> initsS+
+                                           list.enumerate
+                                           (list/map (|>> product.left (n/+ offset) //reference.local')))
+                                       #.None]
+                                      bodyO)])
+                    (_.apply/* @loop initsO+)))))
+
+(def: #export (recur translate argsS+)
+  (-> Translator (List Synthesis) (Operation Computation))
+  (do compiler.Monad<Operation>
+    [@loop ///.anchor
+     argsO+ (monad.map @ translate argsS+)]
+    (wrap (_.apply/* @loop argsO+))))
diff --git a/stdlib/source/lux/lang/translation/scheme/primitive.jvm.lux b/stdlib/source/lux/lang/translation/scheme/primitive.jvm.lux
new file mode 100644
index 000000000..ac775fa82
--- /dev/null
+++ b/stdlib/source/lux/lang/translation/scheme/primitive.jvm.lux
@@ -0,0 +1,22 @@
+(.module:
+  [lux #- i64]
+  [/// #+ State]
+  (//// [compiler #+ "operation/" Monad<Operation>]
+        (host ["_" scheme #+ Expression]))
+  [//runtime #+ Operation])
+
+(def: #export bool
+  (-> Bool (Operation Expression))
+  (|>> _.bool operation/wrap))
+
+(def: #export i64
+  (-> (I64 Any) (Operation Expression))
+  (|>> .int _.int operation/wrap))
+
+(def: #export f64
+  (-> Frac (Operation Expression))
+  (|>> _.float operation/wrap))
+
+(def: #export text
+  (-> Text (Operation Expression))
+  (|>> _.string operation/wrap))
diff --git a/stdlib/source/lux/lang/translation/scheme/reference.jvm.lux b/stdlib/source/lux/lang/translation/scheme/reference.jvm.lux
new file mode 100644
index 000000000..453d4edb6
--- /dev/null
+++ b/stdlib/source/lux/lang/translation/scheme/reference.jvm.lux
@@ -0,0 +1,54 @@
+(.module:
+  lux
+  (lux (control pipe)
+       (data text/format))
+  (//// [reference #+ Register Variable Reference]
+        [name]
+        [compiler "operation/" Monad<Operation>]
+        [analysis #+ Variant Tuple]
+        [synthesis #+ Synthesis]
+        (host ["_" scheme #+ Expression Var]))
+  [//runtime #+ Operation Translator]
+  [//primitive])
+
+(do-template [<name> <prefix>]
+  [(def: #export <name>
+     (-> Register Var)
+     (|>> .int %i (format <prefix>) _.var))]
+
+  [local'   "l"]
+  [foreign' "f"]
+  )
+
+(def: #export variable'
+  (-> Variable Var)
+  (|>> (case> (#reference.Local register)
+              (local' register)
+              
+              (#reference.Foreign register)
+              (foreign' register))))
+
+(def: #export variable
+  (-> Variable (Operation Var))
+  (|>> ..variable'
+       operation/wrap))
+
+(def: #export constant'
+  (-> Ident Var)
+  (|>> name.definition _.var))
+
+(def: #export constant
+  (-> Ident (Operation Var))
+  (|>> constant' operation/wrap))
+
+(def: #export reference'
+  (-> Reference Expression)
+  (|>> (case> (#reference.Constant value)
+              (..constant' value)
+              
+              (#reference.Variable value)
+              (..variable' value))))
+
+(def: #export reference
+  (-> Reference (Operation Expression))
+  (|>> reference' operation/wrap))
diff --git a/stdlib/source/lux/lang/translation/scheme/runtime.jvm.lux b/stdlib/source/lux/lang/translation/scheme/runtime.jvm.lux
new file mode 100644
index 000000000..b30aff3a2
--- /dev/null
+++ b/stdlib/source/lux/lang/translation/scheme/runtime.jvm.lux
@@ -0,0 +1,362 @@
+(.module:
+  lux
+  (lux (control ["p" parser "p/" Monad<Parser>]
+                [monad #+ do])
+       (data [number #+ hex]
+             text/format
+             (coll [list "list/" Monad<List>]))
+       [function]
+       (macro [code]
+              ["s" syntax #+ syntax:]))
+  [/// #+ State]
+  (//// [name]
+        [compiler]
+        [analysis #+ Variant]
+        [synthesis]
+        (host ["_" scheme #+ Expression Computation Var])))
+
+(type: #export Operation
+  (compiler.Operation (State Var Expression)))
+
+(type: #export Translator
+  (///.Translator Var Expression))
+
+(def: prefix Text "LuxRuntime")
+
+(def: unit (_.string synthesis.unit))
+
+(def: #export variant-tag "lux-variant")
+
+(def: (flag value)
+  (-> Bool Computation)
+  (if value
+    (_.string "")
+    _.nil))
+
+(def: (variant' tag last? value)
+  (-> Expression Expression Expression Computation)
+  (<| (_.cons/2 (_.symbol ..variant-tag))
+      (_.cons/2 tag)
+      (_.cons/2 last?)
+      value))
+
+(def: #export (variant [lefts right? value])
+  (-> (Variant Expression) Computation)
+  (variant' (_.int (.int lefts)) (flag right?) value))
+
+(def: #export none
+  Computation
+  (variant [+0 false ..unit]))
+
+(def: #export some
+  (-> Expression Computation)
+  (|>> [+0 true] ..variant))
+
+(def: #export left
+  (-> Expression Computation)
+  (|>> [+0 false] ..variant))
+
+(def: #export right
+  (-> Expression Computation)
+  (|>> [+0 true] ..variant))
+
+(def: declaration
+  (s.Syntax [Text (List Text)])
+  (p.either (p.seq s.local-symbol (p/wrap (list)))
+            (s.form (p.seq s.local-symbol (p.some s.local-symbol)))))
+
+(syntax: (runtime: {[name args] declaration}
+           definition)
+  (let [implementation (code.local-symbol (format "@@" name))
+        runtime (format prefix "__" (name.normalize name))
+        @runtime (` (_.var (~ (code.text runtime))))
+        argsC+ (list/map code.local-symbol args)
+        argsLC+ (list/map (|>> name.normalize (format "LRV__") code.text (~) (_.var) (`))
+                          args)
+        declaration (` ((~ (code.local-symbol name))
+                        (~+ argsC+)))
+        type (` (-> (~+ (list.repeat (list.size argsC+) (` _.Expression)))
+                    _.Computation))]
+    (wrap (list (` (def: (~' #export) (~ declaration)
+                     (~ type)
+                     (~ (case argsC+
+                          #.Nil
+                          @runtime
+
+                          _
+                          (` (_.apply/* (~ @runtime) (list (~+ argsC+))))))))
+                (` (def: (~ implementation)
+                     _.Computation
+                     (~ (case argsC+
+                          #.Nil
+                          (` (_.define (~ @runtime) [(list) #.None] (~ definition)))
+
+                          _
+                          (` (let [(~+ (|> (list.zip2 argsC+ argsLC+)
+                                           (list/map (function (_ [left right])
+                                                       (list left right)))
+                                           list/join))]
+                               (_.define (~ @runtime) [(list (~+ argsLC+)) #.None]
+                                         (~ definition))))))))))))
+
+(runtime: (slice offset length list)
+  (<| (_.if (_.null?/1 list)
+        list)
+      (_.if (|> offset (_.>/2 (_.int 0)))
+        (slice (|> offset (_.-/2 (_.int 1)))
+               length
+               (_.cdr/1 list)))
+      (_.if (|> length (_.>/2 (_.int 0)))
+        (_.cons/2 (_.car/1 list)
+                  (slice offset
+                         (|> length (_.-/2 (_.int 1)))
+                         (_.cdr/1 list))))
+      _.nil))
+
+(syntax: #export (with-vars {vars (s.tuple (p.many s.local-symbol))}
+                   body)
+  (wrap (list (` (let [(~+ (|> vars
+                               (list/map (function (_ var)
+                                           (list (code.local-symbol var)
+                                                 (` (_.var (~ (code.text (format "LRV__" (name.normalize var)))))))))
+                               list/join))]
+                   (~ body))))))
+
+(runtime: (lux//try op)
+  (with-vars [error]
+    (_.with-exception-handler
+      (_.lambda [(list error) #.None]
+           (..left error))
+      (_.lambda [(list) #.None]
+           (..right (_.apply/* op (list ..unit)))))))
+
+(runtime: (lux//program-args program-args)
+  (with-vars [@loop @input @output]
+    (_.letrec (list [@loop (_.lambda [(list @input @output) #.None]
+                                (_.if (_.eqv?/2 _.nil @input)
+                                  @output
+                                  (_.apply/2 @loop (_.cdr/1 @input) (..some (_.vector/* (list (_.car/1 @input) @output))))))])
+              (_.apply/2 @loop (_.reverse/1 program-args) ..none))))
+
+(def: runtime//lux
+  Computation
+  (_.begin (list @@lux//try
+                 @@lux//program-args)))
+
+(def: minimum-index-length
+  (-> Expression Computation)
+  (|>> (_.+/2 (_.int 1))))
+
+(def: product-element
+  (-> Expression Expression Computation)
+  (function.flip _.vector-ref/2))
+
+(def: (product-tail product)
+  (-> Expression Computation)
+  (_.vector-ref/2 product (|> (_.length/1 product) (_.-/2 (_.int 1)))))
+
+(def: (updated-index min-length product)
+  (-> Expression Expression Computation)
+  (|> min-length (_.-/2 (_.length/1 product))))
+
+(runtime: (product//left product index)
+  (let [@index_min_length (_.var "index_min_length")]
+    (_.begin
+     (list (_.define @index_min_length [(list) #.None]
+                     (minimum-index-length index))
+           (_.if (|> product _.length/1 (_.>/2 @index_min_length))
+             ## No need for recursion
+             (product-element index product)
+             ## Needs recursion
+             (product//left (product-tail product)
+                            (updated-index @index_min_length product)))))))
+
+(runtime: (product//right product index)
+  (let [@index_min_length (_.var "index_min_length")
+        @product_length (_.var "product_length")
+        @slice (_.var "slice")
+        last-element? (|> @product_length (_.=/2 @index_min_length))
+        needs-recursion? (|> @product_length (_.</2 @index_min_length))]
+    (_.begin
+     (list
+      (_.define @index_min_length [(list) #.None] (minimum-index-length index))
+      (_.define @product_length [(list) #.None] (_.length/1 product))
+      (<| (_.if last-element?
+            (product-element index product))
+          (_.if needs-recursion?
+            (product//right (product-tail product)
+                            (updated-index @index_min_length product)))
+          ## Must slice
+          (_.begin
+           (list (_.define @slice [(list) #.None]
+                           (_.make-vector/1 (|> @product_length (_.-/2 index))))
+                 (_.vector-copy!/5 @slice (_.int 0) product index @product_length)
+                 @slice)))))))
+
+(runtime: (sum//get sum last? wanted-tag)
+  (with-vars [variant-tag sum-tag sum-flag sum-value]
+    (let [no-match _.nil
+          is-last? (|> sum-flag (_.eqv?/2 (_.string "")))
+          test-recursion (_.if is-last?
+                           ## Must recurse.
+                           (sum//get sum-value
+                                     (|> wanted-tag (_.-/2 sum-tag))
+                                     last?)
+                           no-match)]
+      (<| (_.let-values (list [[(list variant-tag sum-tag sum-flag sum-value) #.None]
+                               (_.apply/* (_.global "apply") (list (_.global "values") sum))]))
+          (_.if (|> wanted-tag (_.=/2 sum-tag))
+            (_.if (|> sum-flag (_.eqv?/2 last?))
+              sum-value
+              test-recursion))
+          (_.if (|> wanted-tag (_.>/2 sum-tag))
+            test-recursion)
+          (_.if (_.and (list (|> last? (_.eqv?/2 (_.string "")))
+                             (|> wanted-tag (_.</2 sum-tag))))
+            (variant' (|> sum-tag (_.-/2 wanted-tag)) sum-flag sum-value))
+          no-match))))
+
+(def: runtime//adt
+  Computation
+  (_.begin (list @@product//left
+                 @@product//right
+                 @@sum//get)))
+
+(runtime: (bit//logical-right-shift shift input)
+  (_.if (_.=/2 (_.int 0) shift)
+    input
+    (|> input
+        (_.arithmetic-shift/2 (_.*/2 (_.int -1) shift))
+        (_.bit-and/2 (_.int (hex "7FFFFFFFFFFFFFFF"))))))
+
+(def: runtime//bit
+  Computation
+  (_.begin (list @@bit//logical-right-shift)))
+
+(runtime: (frac//decode input)
+  (with-vars [@output]
+    (_.let (list [@output ((_.apply/1 (_.global "string->number")) input)])
+      (_.if (_.and (list (_.not/1 (_.=/2 @output @output))
+                         (_.not/1 (_.eqv?/2 (_.string "+nan.0") input))))
+        ..none
+        (..some @output)))))
+
+(def: runtime//frac
+  Computation
+  (_.begin
+   (list @@frac//decode)))
+
+(def: (check-index-out-of-bounds array idx body)
+  (-> Expression Expression Expression Computation)
+  (_.if (|> idx (_.<=/2 (_.length/1 array)))
+    body
+    (_.raise/1 (_.string "Array index out of bounds!"))))
+
+(runtime: (array//get array idx)
+  (with-vars [@temp]
+    (<| (check-index-out-of-bounds array idx)
+        (_.let (list [@temp (_.vector-ref/2 array idx)])
+          (_.if (|> @temp (_.eqv?/2 _.nil))
+            ..none
+            (..some @temp))))))
+
+(runtime: (array//put array idx value)
+  (<| (check-index-out-of-bounds array idx)
+      (_.begin
+       (list (_.vector-set!/3 array idx value)
+             array))))
+
+(def: runtime//array
+  Computation
+  (_.begin
+   (list @@array//get
+         @@array//put)))
+
+(runtime: (atom//compare-and-swap atom old new)
+  (with-vars [@temp]
+    (_.let (list [@temp (_.vector-ref/2 atom (_.int 0))])
+      (_.if (_.eq?/2 old @temp)
+        (_.begin
+         (list (_.vector-set!/3 atom (_.int 0) new)
+               (_.bool true)))
+        (_.bool false)))))
+
+(def: runtime//atom
+  Computation
+  @@atom//compare-and-swap)
+
+(runtime: (box//write value box)
+  (_.begin
+   (list
+    (_.vector-set!/3 box (_.int 0) value)
+    ..unit)))
+
+(def: runtime//box
+  Computation
+  (_.begin (list @@box//write)))
+
+(runtime: (io//current-time _)
+  (|> (_.apply/* (_.global "current-second") (list))
+      (_.*/2 (_.int 1_000))
+      _.exact/1))
+
+(def: runtime//io
+  (_.begin (list @@io//current-time)))
+
+(def: process//incoming
+  Var
+  (_.var (name.normalize "process//incoming")))
+
+(runtime: (process//loop _)
+  (_.when (_.not/1 (_.null?/1 process//incoming))
+          (with-vars [queue process]
+            (_.let (list [queue process//incoming])
+              (_.begin (list (_.set! process//incoming (_.list/* (list)))
+                             (_.map/2 (_.lambda [(list process) #.None]
+                                           (_.apply/1 process ..unit))
+                                      queue)
+                             (process//loop ..unit)))))))
+
+(runtime: (process//schedule milli-seconds procedure)
+  (let [process//future (function (_ process)
+                          (_.set! process//incoming (_.cons/2 process process//incoming)))]
+    (_.begin
+     (list
+      (_.if (_.=/2 (_.int 0) milli-seconds)
+        (process//future procedure)
+        (with-vars [@start @process @now @ignored]
+          (_.let (list [@start (io//current-time ..unit)])
+            (_.letrec (list [@process (_.lambda [(list) (#.Some @ignored)]
+                                           (_.let (list [@now (io//current-time ..unit)])
+                                             (_.if (|> @now (_.-/2 @start) (_.>=/2 milli-seconds))
+                                               (_.apply/1 procedure ..unit)
+                                               (process//future @process))))])
+                      (process//future @process)))))
+      ..unit))))
+
+(def: runtime//process
+  Computation
+  (_.begin (list (_.define process//incoming [(list) #.None] (_.list/* (list)))
+                 @@process//loop
+                 @@process//schedule)))
+
+(def: runtime
+  Computation
+  (_.begin (list @@slice
+                 runtime//lux
+                 runtime//bit
+                 runtime//adt
+                 runtime//frac
+                 runtime//array
+                 runtime//atom
+                 runtime//box
+                 runtime//io
+                 runtime//process
+                 )))
+
+(def: #export translate
+  (Operation Any)
+  (///.with-buffer
+    (do compiler.Monad<Operation>
+      [_ (///.save! ["" ..prefix] ..runtime)]
+      (///.save-buffer! ""))))
diff --git a/stdlib/source/lux/lang/translation/scheme/structure.jvm.lux b/stdlib/source/lux/lang/translation/scheme/structure.jvm.lux
new file mode 100644
index 000000000..a11434594
--- /dev/null
+++ b/stdlib/source/lux/lang/translation/scheme/structure.jvm.lux
@@ -0,0 +1,29 @@
+(.module:
+  lux
+  (lux (control [monad #+ do]))
+  (//// [compiler]
+        [analysis #+ Variant Tuple]
+        [synthesis #+ Synthesis]
+        (host ["_" scheme #+ Expression]))
+  [//runtime #+ Operation Translator]
+  [//primitive])
+
+(def: #export (tuple translate elemsS+)
+  (-> Translator (Tuple Synthesis) (Operation Expression))
+  (case elemsS+
+    #.Nil
+    (//primitive.text synthesis.unit)
+
+    (#.Cons singletonS #.Nil)
+    (translate singletonS)
+
+    _
+    (do compiler.Monad<Operation>
+      [elemsT+ (monad.map @ translate elemsS+)]
+      (wrap (_.vector/* elemsT+)))))
+
+(def: #export (variant translate [lefts right? valueS])
+  (-> Translator (Variant Synthesis) (Operation Expression))
+  (do compiler.Monad<Operation>
+    [valueT (translate valueS)]
+    (wrap (//runtime.variant [lefts right? valueT]))))