Updates for R compiler.

21 files changed, 2052 insertions, 12 deletions

diff --git a/stdlib/source/lux/target/r.lux b/stdlib/source/lux/target/r.lux
new file mode 100644
index 000000000..c60456ad2
--- /dev/null
+++ b/stdlib/source/lux/target/r.lux
@@ -0,0 +1,378 @@
+(.module:
+  [lux (#- Code or and list if function cond not int)
+   [control
+    [pipe (#+ case> cond> new>)]
+    ["." function]
+    [parser
+     ["<.>" code]]]
+   [data
+    ["." maybe ("#\." functor)]
+    ["." text
+     ["%" format (#+ format)]]
+    [collection
+     ["." list ("#\." functor fold)]]]
+   [macro
+    [syntax (#+ syntax:)]
+    ["." template]
+    ["." code]]
+   [math
+    [number
+     ["f" frac]]]
+   [type
+    abstract]])
+
+(abstract: #export (Code kind)
+  Text
+
+  {}
+
+  (template [<type> <super>+]
+    [(with_expansions [<kind> (template.identifier [<type> "'"])]
+       (abstract: #export (<kind> kind) Any)
+       (`` (type: #export <type> (|> Any <kind> (~~ (template.splice <super>+))))))]
+    
+    [Expression [Code]]
+    )
+
+  (template [<type> <super>+]
+    [(with_expansions [<kind> (template.identifier [<type> "'"])]
+       (abstract: #export (<kind> kind) Any)
+       (`` (type: #export (<type> <brand>) (|> <brand> <kind> (~~ (template.splice <super>+))))))]
+    
+    [Var [Expression' Code]]
+    )
+
+  (template [<var> <kind>]
+    [(abstract: #export <kind> Any)
+     (type: #export <var> (Var <kind>))]
+
+    [SVar Single]
+    [PVar Poly]
+    )
+
+  (def: #export var
+    (-> Text SVar)
+    (|>> :abstraction))
+  
+  (def: #export var_args
+    PVar
+    (:abstraction "..."))
+
+  (def: #export manual
+    (-> Text Code)
+    (|>> :abstraction))
+  
+  (def: #export code
+    (-> (Code Any) Text)
+    (|>> :representation))
+
+  (def: (self_contained code)
+    (-> Text Expression)
+    (:abstraction
+     (format "(" code ")")))
+
+  (def: nest
+    (-> Text Text)
+    (let [nested_new_line (format text.new_line text.tab)]
+      (|>> (format text.new_line)
+           (text.replace_all text.new_line nested_new_line))))
+
+  (def: (_block expression)
+    (-> Text Text)
+    (format "{" (nest expression) text.new_line "}"))
+
+  (def: #export (block expression)
+    (-> Expression Expression)
+    (:abstraction
+     (format "{" (:representation expression) "}")))
+
+  (template [<name> <r>]
+    [(def: #export <name>
+       Expression
+       (..self_contained <r>))]
+
+    [null "NULL"]
+    [n/a "NA"]
+    )
+
+  (template [<name>]
+    [(def: #export <name> Expression n/a)]
+
+    [not_available]
+    [not_applicable]
+    [no_answer]
+    )
+
+  (def: #export bool
+    (-> Bit Expression)
+    (|>> (case> #0 "FALSE"
+                #1 "TRUE")
+         ..self_contained))
+
+  (def: #export (int value)
+    (-> Int Expression)
+    (..self_contained (format "as.integer(" (%.int value) ")")))
+
+  (def: #export float
+    (-> Frac Expression)
+    (|>> (cond> [(f.= f.positive_infinity)]
+                [(new> "1.0/0.0" [])]
+                
+                [(f.= f.negative_infinity)]
+                [(new> "-1.0/0.0" [])]
+                
+                [(f.= f.not_a_number)]
+                [(new> "0.0/0.0" [])]
+                
+                ## else
+                [%.frac])
+         ..self_contained))
+
+  (def: sanitize
+    (-> Text Text)
+    (`` (|>> (~~ (template [<find> <replace>]
+                   [(text.replace_all <find> <replace>)]
+
+                   ["\" "\\"]
+                   ["|" "\|"]
+                   [text.alarm "\a"]
+                   [text.back_space "\b"]
+                   [text.tab "\t"]
+                   [text.new_line "\n"]
+                   [text.carriage_return "\r"]
+                   [text.double_quote (format "\" text.double_quote)]
+                   ))
+             )))
+
+  (def: #export string
+    (-> Text Expression)
+    (|>> %.text ..sanitize ..self_contained))
+
+  (def: (composite_literal left_delimiter right_delimiter entry_serializer)
+    (All [a] (-> Text Text (-> a Text)
+                 (-> (List a) Expression)))
+    (.function (_ entries)
+      (..self_contained
+       (format left_delimiter
+               (|> entries (list\map entry_serializer) (text.join_with ","))
+               right_delimiter))))
+
+  (def: #export named_list
+    (-> (List [Text Expression]) Expression)
+    (composite_literal "list(" ")" (.function (_ [key value])
+                                     (format key "=" (:representation value)))))
+  
+  (template [<name> <function>]
+    [(def: #export <name>
+       (-> (List Expression) Expression)
+       (composite_literal (format <function> "(") ")" ..code))]
+
+    [vector "c"]
+    [list   "list"]
+    )
+  
+  (def: #export (slice from to list)
+    (-> Expression Expression Expression Expression)
+    (..self_contained
+     (format (:representation list)
+             "[" (:representation from) ":" (:representation to) "]")))
+
+  (def: #export (slice_from from list)
+    (-> Expression Expression Expression)
+    (..self_contained
+     (format (:representation list)
+             "[-1"  ":-" (:representation from) "]")))
+
+  (def: #export (apply args func)
+    (-> (List Expression) Expression Expression)
+    (..self_contained
+     (format (:representation func) "(" (text.join_with "," (list\map ..code args)) ")")))
+
+  (def: #export (apply_kw args kw_args func)
+    (-> (List Expression) (List [Text Expression]) Expression Expression)
+    (..self_contained
+     (format (:representation func)
+             (format "("
+                     (text.join_with "," (list\map ..code args)) ","
+                     (text.join_with "," (list\map (.function (_ [key val])
+                                                     (format key "=" (:representation val)))
+                                                   kw_args))
+                     ")"))))
+
+  (syntax: (arity_inputs {arity <code>.nat})
+    (wrap (case arity
+            0 (.list)
+            _ (|> arity
+                  list.indices
+                  (list\map (|>> %.nat code.local_identifier))))))
+
+  (syntax: (arity_types {arity <code>.nat})
+    (wrap (list.repeat arity (` ..Expression))))
+
+  (template [<arity> <function>+]
+    [(with_expansions [<apply> (template.identifier ["apply/" <arity>])
+                       <inputs> (arity_inputs <arity>)
+                       <types> (arity_types <arity>)
+                       <definitions> (template.splice <function>+)]
+       (def: #export (<apply> function [<inputs>])
+         (-> Expression [<types>] Expression)
+         (..apply (.list <inputs>) function))
+
+       (template [<function>]
+         [(`` (def: #export (~~ (template.identifier [<function> "/" <arity>]))
+                (-> [<types>] Expression)
+                (<apply> (..var <function>))))]
+
+         <definitions>))]
+
+    [0
+     [["commandArgs"]]]
+    [1
+     []]
+    [2
+     []]
+    )
+
+  (def: #export (nth idx list)
+    (-> Expression Expression Expression)
+    (..self_contained
+     (format (:representation list) "[[" (:representation idx) "]]")))
+
+  (def: #export (if test then else)
+    (-> Expression Expression Expression Expression)
+    (..self_contained
+     (format "if(" (:representation test) ")"
+             " " (.._block (:representation then))
+             " else " (.._block (:representation else)))))
+
+  (def: #export (when test then)
+    (-> Expression Expression Expression)
+    (..self_contained
+     (format "if(" (:representation test) ") {"
+             (.._block (:representation then))
+             text.new_line "}")))
+
+  (def: #export (cond clauses else)
+    (-> (List [Expression Expression]) Expression Expression)
+    (list\fold (.function (_ [test then] next)
+                 (if test then next))
+               else
+               (list.reverse clauses)))
+
+  (template [<name> <op>]
+    [(def: #export (<name> param subject)
+       (-> Expression Expression Expression)
+       (..self_contained
+        (format (:representation subject)
+                " " <op> " "
+                (:representation param))))]
+
+    [=       "=="]
+    [<       "<"]
+    [<=      "<="]
+    [>       ">"]
+    [>=      ">="]
+    [+       "+"]
+    [-       "-"]
+    [*       "*"]
+    [/       "/"]
+    [%%      "%%"]
+    [**      "**"]
+    [or      "||"]
+    [and     "&&"]
+    )
+
+  (template [<name> <func>]
+    [(def: #export (<name> param subject)
+       (-> Expression Expression Expression)
+       (..apply (.list subject param) (..var <func>)))]
+
+    [bit_or   "bitwOr"]
+    [bit_and  "bitwAnd"]
+    [bit_xor  "bitwXor"]
+    [bit_shl  "bitwShiftL"]
+    [bit_ushr "bitwShiftR"]
+    )
+
+  (def: #export (bit_not subject)
+    (-> Expression Expression)
+    (..apply (.list subject) (..var "bitwNot")))
+
+  (template [<name> <op>]
+    [(def: #export <name>
+       (-> Expression Expression)
+       (|>> :representation (format <op>) ..self_contained))]
+
+    [not    "!"]
+    [negate "-"]
+    )
+  
+  (def: #export (length list)
+    (-> Expression Expression)
+    (..apply (.list list) (..var "length")))
+
+  (def: #export (range from to)
+    (-> Expression Expression Expression)
+    (..self_contained
+     (format (:representation from) ":" (:representation to))))
+
+  (def: #export (function inputs body)
+    (-> (List (Ex [k] (Var k))) Expression Expression)
+    (let [args (|> inputs (list\map ..code) (text.join_with ", "))]
+      (..self_contained
+       (format "function(" args ") "
+               (.._block (:representation body))))))
+
+  (def: #export (try body warning error finally)
+    (-> Expression (Maybe Expression) (Maybe Expression) (Maybe Expression) Expression)
+    (let [optional (: (-> Text (Maybe Expression) (-> Text Text) Text)
+                      (.function (_ parameter value preparation)
+                        (|> value
+                            (maybe\map (|>> :representation preparation (format ", " parameter " = ")))
+                            (maybe.default ""))))]
+      (..self_contained
+       (format "tryCatch("
+               (.._block (:representation body))
+               (optional "warning" warning function.identity)
+               (optional "error" error function.identity)
+               (optional "finally" finally .._block)
+               ")"))))
+
+  (def: #export (while test body)
+    (-> Expression Expression Expression)
+    (..self_contained
+     (format "while (" (:representation test) ") "
+             (.._block (:representation body)))))
+
+  (def: #export (for_in var inputs body)
+    (-> SVar Expression Expression Expression)
+    (..self_contained
+     (format "for (" (:representation var) " in " (:representation inputs) ")"
+             (.._block (:representation body)))))
+
+  (template [<name> <keyword>]
+    [(def: #export (<name> message)
+       (-> Expression Expression)
+       (..apply (.list message) (..var <keyword>)))]
+
+    [stop  "stop"]
+    [print "print"]
+    )
+
+  (def: #export (set! var value)
+    (-> SVar Expression Expression)
+    (..self_contained
+     (format (:representation var) " <- " (:representation value))))
+
+  (def: #export (set_nth! idx value list)
+    (-> Expression Expression SVar Expression)
+    (..self_contained
+     (format (:representation list) "[[" (:representation idx) "]] <- " (:representation value))))
+
+  (def: #export (then pre post)
+    (-> Expression Expression Expression)
+    (:abstraction
+     (format (:representation pre)
+             text.new_line
+             (:representation post))))
+  )
diff --git a/stdlib/source/lux/tool/compiler/language/lux/phase/extension/analysis/r.lux b/stdlib/source/lux/tool/compiler/language/lux/phase/extension/analysis/r.lux
new file mode 100644
index 000000000..12f578ed2
--- /dev/null
+++ b/stdlib/source/lux/tool/compiler/language/lux/phase/extension/analysis/r.lux
@@ -0,0 +1,34 @@
+(.module:
+  [lux #*
+   ["." ffi]
+   [abstract
+    ["." monad (#+ do)]]
+   [control
+    ["<>" parser
+     ["<c>" code (#+ Parser)]]]
+   [data
+    [collection
+     ["." array (#+ Array)]
+     ["." dictionary]
+     ["." list]]]
+   ["." type
+    ["." check]]
+   ["@" target
+    ["_" r]]]
+  [//
+   ["/" lux (#+ custom)]
+   [//
+    ["." bundle]
+    [//
+     ["." analysis #_
+      ["#/." type]]
+     [//
+      ["." analysis (#+ Analysis Operation Phase Handler Bundle)]
+      [///
+       ["." phase]]]]]])
+
+(def: #export bundle
+  Bundle
+  (<| (bundle.prefix "r")
+      (|> bundle.empty
+          )))
diff --git a/stdlib/source/lux/tool/compiler/language/lux/phase/extension/generation/r.lux b/stdlib/source/lux/tool/compiler/language/lux/phase/extension/generation/r.lux
new file mode 100644
index 000000000..cd0f6b7cc
--- /dev/null
+++ b/stdlib/source/lux/tool/compiler/language/lux/phase/extension/generation/r.lux
@@ -0,0 +1,17 @@
+(.module:
+  [lux #*
+   [data
+    [collection
+     ["." dictionary]]]]
+  ["." / #_
+   ["#." common]
+   ["#." host]
+   [////
+    [generation
+     [r
+      [runtime (#+ Bundle)]]]]])
+
+(def: #export bundle
+  Bundle
+  (dictionary.merge /common.bundle
+                    /host.bundle))
diff --git a/stdlib/source/lux/tool/compiler/language/lux/phase/extension/generation/r/common.lux b/stdlib/source/lux/tool/compiler/language/lux/phase/extension/generation/r/common.lux
new file mode 100644
index 000000000..cb82c6cb4
--- /dev/null
+++ b/stdlib/source/lux/tool/compiler/language/lux/phase/extension/generation/r/common.lux
@@ -0,0 +1,179 @@
+(.module:
+  [lux #*
+   [abstract
+    ["." monad (#+ do)]]
+   [control
+    ["." function]
+    ["." try]
+    ["<>" parser
+     ["<s>" synthesis (#+ Parser)]]]
+   [data
+    ["." product]
+    ["." text
+     ["%" format (#+ format)]]
+    [collection
+     ["." dictionary]
+     ["." set]
+     ["." list ("#\." functor fold)]]]
+   [math
+    [number
+     ["f" frac]]]
+   ["@" target
+    ["_" r (#+ Expression)]]]
+  ["." //// #_
+   ["/" bundle]
+   ["/#" // #_
+    ["." extension]
+    [generation
+     [extension (#+ Nullary Unary Binary Trinary
+                    nullary unary binary trinary)]
+     ["." reference]
+     ["//" r #_
+      ["#." runtime (#+ Operation Phase Handler Bundle Generator)]
+      ["#." case]]]
+    [//
+     ["." synthesis (#+ %synthesis)]
+     ["." generation]
+     [///
+      ["#" phase]]]]])
+
+(def: #export (custom [parser handler])
+  (All [s]
+    (-> [(Parser s)
+         (-> Text (Generator s))]
+        Handler))
+  (function (_ extension_name phase archive input)
+    (case (<s>.run parser input)
+      (#try.Success input')
+      (handler extension_name phase archive input')
+
+      (#try.Failure error)
+      (/////.throw extension.invalid_syntax [extension_name %synthesis input]))))
+
+## (template: (!unary function)
+##   (|>> list _.apply/* (|> (_.constant function))))
+
+## ## ## TODO: Get rid of this ASAP
+## ## (def: lux::syntax_char_case!
+## ##   (..custom [($_ <>.and
+## ##                  <s>.any
+## ##                  <s>.any
+## ##                  (<>.some (<s>.tuple ($_ <>.and
+## ##                                          (<s>.tuple (<>.many <s>.i64))
+## ##                                          <s>.any))))
+## ##              (function (_ extension_name phase archive [input else conditionals])
+## ##                (do {! /////.monad}
+## ##                  [@input (\ ! map _.var (generation.gensym "input"))
+## ##                   inputG (phase archive input)
+## ##                   elseG (phase archive else)
+## ##                   conditionalsG (: (Operation (List [Expression Expression]))
+## ##                                    (monad.map ! (function (_ [chars branch])
+## ##                                                   (do !
+## ##                                                     [branchG (phase archive branch)]
+## ##                                                     (wrap [(|> chars (list\map (|>> .int _.int (_.=/2 @input))) _.or)
+## ##                                                            branchG])))
+## ##                                               conditionals))]
+## ##                  (wrap (_.let (list [@input inputG])
+## ##                          (list (list\fold (function (_ [test then] else)
+## ##                                             (_.if test then else))
+## ##                                           elseG
+## ##                                           conditionalsG))))))]))
+
+## (def: lux_procs
+##   Bundle
+##   (|> /.empty
+##       ## (/.install "syntax char case!" lux::syntax_char_case!)
+##       (/.install "is" (binary _.eq/2))
+##       ## (/.install "try" (unary //runtime.lux//try))
+##       ))
+
+## ## (def: (capped operation parameter subject)
+## ##   (-> (-> Expression Expression Expression)
+## ##       (-> Expression Expression Expression))
+## ##   (//runtime.i64//64 (operation parameter subject)))
+
+## (def: i64_procs
+##   Bundle
+##   (<| (/.prefix "i64")
+##       (|> /.empty
+##           (/.install "and" (binary _.logand/2))
+##           (/.install "or" (binary _.logior/2))
+##           (/.install "xor" (binary _.logxor/2))
+##           (/.install "left-shift" (binary _.ash/2))
+##           (/.install "right-shift" (binary (product.uncurry //runtime.i64//right_shift)))
+##           (/.install "=" (binary _.=/2))
+##           (/.install "<" (binary _.</2))
+##           (/.install "+" (binary _.+/2))
+##           (/.install "-" (binary _.-/2))
+##           (/.install "*" (binary _.*/2))
+##           (/.install "/" (binary _.floor/2))
+##           (/.install "%" (binary _.rem/2))
+##           ## (/.install "f64" (unary (_.//2 (_.float +1.0))))
+##           (/.install "char" (unary (|>> _.code-char/1 _.string/1)))
+##           )))
+
+## (def: f64_procs
+##   Bundle
+##   (<| (/.prefix "f64")
+##       (|> /.empty
+##           ## (/.install "=" (binary (product.uncurry _.=/2)))
+##           ## (/.install "<" (binary (product.uncurry _.</2)))
+##           ## (/.install "+" (binary (product.uncurry _.+/2)))
+##           ## (/.install "-" (binary (product.uncurry _.-/2)))
+##           ## (/.install "*" (binary (product.uncurry _.*/2)))
+##           ## (/.install "/" (binary (product.uncurry _.//2)))
+##           ## (/.install "%" (binary (product.uncurry _.rem/2)))
+##           ## (/.install "i64" (unary _.truncate/1))
+##           (/.install "encode" (unary _.write-to-string/1))
+##           ## (/.install "decode" (unary //runtime.f64//decode))
+##           )))
+
+## (def: (text//index [offset sub text])
+##   (Trinary (Expression Any))
+##   (//runtime.text//index offset sub text))
+
+## (def: (text//clip [offset length text])
+##   (Trinary (Expression Any))
+##   (//runtime.text//clip offset length text))
+
+## (def: (text//char [index text])
+##   (Binary (Expression Any))
+##   (_.char-code/1 (_.char/2 [text index])))
+
+## (def: text_procs
+##   Bundle
+##   (<| (/.prefix "text")
+##       (|> /.empty
+##           (/.install "=" (binary _.string=/2))
+##           ## (/.install "<" (binary (product.uncurry _.string<?/2)))
+##           (/.install "concat" (binary (function (_ [left right])
+##                                         (_.concatenate/3 [(_.symbol "string") left right]))))
+##           (/.install "index" (trinary ..text//index))
+##           (/.install "size" (unary _.length/1))
+##           (/.install "char" (binary ..text//char))
+##           (/.install "clip" (trinary ..text//clip))
+##           )))
+
+## (def: (io//log! message)
+##   (Unary (Expression Any))
+##   (_.progn (list (_.write-line/1 message)
+##                  //runtime.unit)))
+
+## (def: io_procs
+##   Bundle
+##   (<| (/.prefix "io")
+##       (|> /.empty
+##           (/.install "log" (unary ..io//log!))
+##           (/.install "error" (unary _.error/1))
+##           )))
+
+(def: #export bundle
+  Bundle
+  (<| (/.prefix "lux")
+      (|> /.empty
+          ## (dictionary.merge lux_procs)
+          ## (dictionary.merge i64_procs)
+          ## (dictionary.merge f64_procs)
+          ## (dictionary.merge text_procs)
+          ## (dictionary.merge io_procs)
+          )))
diff --git a/stdlib/source/lux/tool/compiler/language/lux/phase/extension/generation/r/host.lux b/stdlib/source/lux/tool/compiler/language/lux/phase/extension/generation/r/host.lux
new file mode 100644
index 000000000..2d9148dda
--- /dev/null
+++ b/stdlib/source/lux/tool/compiler/language/lux/phase/extension/generation/r/host.lux
@@ -0,0 +1,39 @@
+(.module:
+  [lux #*
+   [abstract
+    ["." monad (#+ do)]]
+   [control
+    ["." function]
+    ["<>" parser
+     ["<s>" synthesis (#+ Parser)]]]
+   [data
+    [collection
+     ["." dictionary]
+     ["." list]]
+    [text
+     ["%" format (#+ format)]]]
+   [target
+    ["_" r (#+ Var Expression)]]]
+  ["." // #_
+   ["#." common (#+ custom)]
+   ["//#" /// #_
+    ["/" bundle]
+    ["/#" // #_
+     ["." extension]
+     [generation
+      [extension (#+ Nullary Unary Binary Trinary
+                     nullary unary binary trinary)]
+      ["." reference]
+      ["//" r #_
+       ["#." runtime (#+ Operation Phase Handler Bundle
+                         with_vars)]]]
+     ["/#" // #_
+      ["." generation]
+      ["//#" /// #_
+       ["#." phase]]]]]])
+
+(def: #export bundle
+  Bundle
+  (<| (/.prefix "r")
+      (|> /.empty
+          )))
diff --git a/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r.lux b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r.lux
new file mode 100644
index 000000000..b4b3e6423
--- /dev/null
+++ b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r.lux
@@ -0,0 +1,58 @@
+(.module:
+  [lux #*
+   [abstract
+    [monad (#+ do)]]
+   [target
+    ["_" r]]]
+  ["." / #_
+   [runtime (#+ Phase)]
+   ["#." primitive]
+   ["#." structure]
+   ["#." reference]
+   ["#." case]
+   ["#." loop]
+   ["#." function]
+   ["/#" // #_
+    ["#." reference]
+    ["/#" // #_
+     ["#." extension]
+     ["/#" // #_
+      [analysis (#+)]
+      ["#." synthesis]
+      ["//#" /// #_
+       ["#." phase ("#\." monad)]
+       [reference (#+)
+        [variable (#+)]]]]]]])
+
+(def: #export (generate archive synthesis)
+  Phase
+  (case synthesis
+    (^template [<tag> <generator>]
+      [(^ (<tag> value))
+       (//////phase\wrap (<generator> value))])
+    ([////synthesis.bit  /primitive.bit]
+     [////synthesis.i64  /primitive.i64]
+     [////synthesis.f64  /primitive.f64]
+     [////synthesis.text /primitive.text])
+
+    (#////synthesis.Reference value)
+    (//reference.reference /reference.system archive value)
+
+    (^template [<tag> <generator>]
+      [(^ (<tag> value))
+       (<generator> generate archive value)])
+    ([////synthesis.variant /structure.variant]
+     [////synthesis.tuple /structure.tuple]
+     [////synthesis.branch/let /case.let]
+     [////synthesis.branch/if /case.if]
+     [////synthesis.branch/get /case.get]
+     [////synthesis.function/apply /function.apply]
+
+     [////synthesis.branch/case /case.case]
+     [////synthesis.loop/scope /loop.scope]
+     [////synthesis.loop/recur /loop.recur]
+     [////synthesis.function/abstraction /function.function])
+
+    (#////synthesis.Extension extension)
+    (///extension.apply archive generate extension)
+    ))
diff --git a/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/case.lux b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/case.lux
new file mode 100644
index 000000000..fe4e4a7c2
--- /dev/null
+++ b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/case.lux
@@ -0,0 +1,239 @@
+(.module:
+  [lux (#- case let if)
+   [abstract
+    ["." monad (#+ do)]]
+   [data
+    ["." product]
+    ["." text
+     ["%" format (#+ format)]]
+    [collection
+     ["." list ("#\." functor fold)]
+     ["." set]]]
+   [macro
+    ["." template]]
+   [math
+    [number
+     ["i" int]]]
+   [target
+    ["_" r (#+ Expression SVar)]]]
+  ["." // #_
+   ["#." runtime (#+ Operation Phase Generator)]
+   ["#." reference]
+   ["#." primitive]
+   ["/#" // #_
+    ["#." reference]
+    ["/#" // #_
+     ["#." synthesis #_
+      ["#/." case]]
+     ["/#" // #_
+      ["#." synthesis (#+ Member Synthesis Path)]
+      ["#." generation]
+      ["//#" /// #_
+       [reference
+        ["#." variable (#+ Register)]]
+       ["#." phase ("#\." monad)]
+       [meta
+        [archive (#+ Archive)]]]]]]])
+
+(def: #export register
+  (-> Register SVar)
+  (|>> (///reference.local //reference.system) :assume))
+
+(def: #export capture
+  (-> Register SVar)
+  (|>> (///reference.foreign //reference.system) :assume))
+
+(def: #export (let expression archive [valueS register bodyS])
+  (Generator [Synthesis Register Synthesis])
+  (do ///////phase.monad
+    [valueO (expression archive valueS)
+     bodyO (expression archive bodyS)]
+    (wrap (_.block
+           ($_ _.then
+               (_.set! (..register register) valueO)
+               bodyO)))))
+
+(def: #export (if expression archive [testS thenS elseS])
+  (Generator [Synthesis Synthesis Synthesis])
+  (do ///////phase.monad
+    [testO (expression archive testS)
+     thenO (expression archive thenS)
+     elseO (expression archive elseS)]
+    (wrap (_.if testO thenO elseO))))
+
+(def: #export (get expression archive [pathP valueS])
+  (Generator [(List Member) Synthesis])
+  (do ///////phase.monad
+    [valueO (expression archive valueS)]
+    (wrap (list\fold (function (_ side source)
+                       (.let [method (.case side
+                                       (^template [<side> <accessor>]
+                                         [(<side> lefts)
+                                          (<accessor> (_.int (.int lefts)))])
+                                       ([#.Left  //runtime.tuple::left]
+                                        [#.Right //runtime.tuple::right]))]
+                         (method source)))
+                     valueO
+                     (list.reverse pathP)))))
+
+(def: $savepoint (_.var "lux_pm_cursor_savepoint"))
+(def: $cursor (_.var "lux_pm_cursor"))
+(def: $temp (_.var "lux_pm_temp"))
+(def: $alt_error (_.var "alt_error"))
+
+(def: top
+  _.length)
+
+(def: next
+  (|>> _.length (_.+ (_.int +1))))
+
+(def: (push! value var)
+  (-> Expression SVar Expression)
+  (_.set_nth! (next var) value var))
+
+(def: (pop! var)
+  (-> SVar Expression)
+  (_.set_nth! (top var) _.null var))
+
+(def: (push_cursor! value)
+  (-> Expression Expression)
+  (push! value $cursor))
+
+(def: save_cursor!
+  Expression
+  (push! (_.slice (_.float +1.0) (_.length $cursor) $cursor)
+         $savepoint))
+
+(def: restore_cursor!
+  Expression
+  (_.set! $cursor (_.nth (top $savepoint) $savepoint)))
+
+(def: peek
+  Expression
+  (|> $cursor (_.nth (top $cursor))))
+
+(def: pop_cursor!
+  Expression
+  (pop! $cursor))
+
+(def: error
+  (_.string (template.with_locals [error]
+              (template.text [error]))))
+
+(def: fail!
+  (_.stop ..error))
+
+(def: (catch handler)
+  (-> Expression Expression)
+  (_.function (list $alt_error)
+    (_.if (|> $alt_error (_.= ..error))
+      handler
+      (_.stop $alt_error))))
+
+(def: (pattern_matching' expression archive)
+  (Generator Path)
+  (function (recur pathP)
+    (.case pathP
+      (#/////synthesis.Then bodyS)
+      (expression archive bodyS)
+
+      #/////synthesis.Pop
+      (///////phase\wrap ..pop_cursor!)
+
+      (#/////synthesis.Bind register)
+      (///////phase\wrap (_.set! (..register register) ..peek))
+
+      (#/////synthesis.Bit_Fork when thenP elseP)
+      (do {! ///////phase.monad}
+        [then! (recur thenP)
+         else! (.case elseP
+                 (#.Some elseP)
+                 (recur elseP)
+
+                 #.None
+                 (wrap ..fail!))]
+        (wrap (.if when
+                (_.if ..peek
+                  then!
+                  else!)
+                (_.if ..peek
+                  else!
+                  then!))))
+
+      (^template [<tag> <format> <=>]
+        [(<tag> cons)
+         (do {! ///////phase.monad}
+           [clauses (monad.map ! (function (_ [match then])
+                                   (do !
+                                     [then! (recur then)]
+                                     (wrap [(<=> (|> match <format>)
+                                                 ..peek)
+                                            then!])))
+                               (#.Cons cons))]
+           (wrap (list\fold (function (_ [when then] else)
+                              (_.if when then else))
+                            ..fail!
+                            clauses)))])
+      ([#/////synthesis.I64_Fork //primitive.i64 //runtime.i64::=]
+       [#/////synthesis.F64_Fork //primitive.f64 _.=]
+       [#/////synthesis.Text_Fork //primitive.text _.=])
+
+      (^template [<pm> <flag> <prep>]
+        [(^ (<pm> idx))
+         (///////phase\wrap ($_ _.then
+                                (_.set! $temp (|> idx <prep> .int _.int (//runtime.sum::get ..peek (//runtime.flag <flag>))))
+                                (_.if (_.= _.null $temp)
+                                  ..fail!
+                                  (..push_cursor! $temp))))])
+      ([/////synthesis.side/left  false (<|)]
+       [/////synthesis.side/right true  inc])
+
+      (^ (/////synthesis.member/left 0))
+      (///////phase\wrap (_.nth (_.int +1) ..peek))
+
+      (^template [<pm> <getter>]
+        [(^ (<pm> lefts))
+         (///////phase\wrap (|> ..peek (<getter> (_.int (.int lefts))) ..push_cursor!))])
+      ([/////synthesis.member/left  //runtime.tuple::left]
+       [/////synthesis.member/right //runtime.tuple::right])
+
+      (^ (/////synthesis.path/seq leftP rightP))
+      (do ///////phase.monad
+        [leftO (recur leftP)
+         rightO (recur rightP)]
+        (wrap ($_ _.then
+                  leftO
+                  rightO)))
+
+      (^ (/////synthesis.path/alt leftP rightP))
+      (do {! ///////phase.monad}
+        [leftO (recur leftP)
+         rightO (recur rightP)]
+        (wrap (_.try ($_ _.then
+                         ..save_cursor!
+                         leftO)
+                     #.None
+                     (#.Some (..catch ($_ _.then
+                                          ..restore_cursor!
+                                          rightO)))
+                     #.None)))
+      )))
+
+(def: (pattern_matching expression archive pathP)
+  (Generator Path)
+  (do ///////phase.monad
+    [pattern_matching! (pattern_matching' expression archive pathP)]
+    (wrap (_.try pattern_matching!
+                 #.None
+                 (#.Some (..catch (_.stop (_.string "Invalid expression for pattern-matching."))))
+                 #.None))))
+
+(def: #export (case expression archive [valueS pathP])
+  (Generator [Synthesis Path])
+  (do {! ///////phase.monad}
+    [valueO (expression archive valueS)]
+    (<| (\ ! map (|>> ($_ _.then
+                          (_.set! $cursor (_.list (list valueO)))
+                          (_.set! $savepoint (_.list (list))))
+                      _.block))
+        (pattern_matching expression archive pathP))))
diff --git a/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/function.lux b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/function.lux
new file mode 100644
index 000000000..c89ffaf0a
--- /dev/null
+++ b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/function.lux
@@ -0,0 +1,116 @@
+(.module:
+  [lux (#- function)
+   [abstract
+    ["." monad (#+ do)]]
+   [control
+    pipe]
+   [data
+    ["." product]
+    ["." text
+     ["%" format (#+ format)]]
+    [collection
+     ["." list ("#\." functor fold)]]]
+   [target
+    ["_" r (#+ Expression SVar)]]]
+  ["." // #_
+   ["#." runtime (#+ Operation Phase Generator)]
+   ["#." reference]
+   ["#." case]
+   ["/#" // #_
+    ["#." reference]
+    ["//#" /// #_
+     [analysis (#+ Variant Tuple Abstraction Application Analysis)]
+     [synthesis (#+ Synthesis)]
+     ["#." generation (#+ Context)]
+     ["//#" /// #_
+      [arity (#+ Arity)]
+      ["#." phase ("#\." monad)]
+      [reference
+       [variable (#+ Register Variable)]]
+      [meta
+       [archive
+        ["." artifact]]]]]]])
+
+(def: #export (apply expression archive [functionS argsS+])
+  (Generator (Application Synthesis))
+  (do {! ///////phase.monad}
+    [functionO (expression archive functionS)
+     argsO+ (monad.map ! (expression archive) argsS+)]
+    (wrap (_.apply argsO+ functionO))))
+
+(def: (with_closure function_id $function inits function_definition)
+  (-> artifact.ID SVar (List Expression) Expression (Operation Expression))
+  (case inits
+    #.Nil
+    (do ///////phase.monad
+      [_ (/////generation.execute! function_definition)
+       _ (/////generation.save! (%.nat function_id)
+                                function_definition)]
+      (wrap $function))
+
+    _
+    (do ///////phase.monad
+      [#let [closure_definition (_.set! $function
+                                        (_.function (|> inits
+                                                        list.size
+                                                        list.indices
+                                                        (list\map //case.capture))
+                                          ($_ _.then
+                                              function_definition
+                                              $function)))]
+       _ (/////generation.execute! closure_definition)
+       _ (/////generation.save! (%.nat function_id) closure_definition)]
+      (wrap (_.apply inits $function)))))
+
+(def: $curried (_.var "curried"))
+(def: $missing (_.var "missing"))
+
+(def: (input_declaration register)
+  (-> Register Expression)
+  (_.set! (|> register inc //case.register)
+          (|> $curried (_.nth (|> register inc .int _.int)))))
+
+(def: #export (function expression archive [environment arity bodyS])
+  (Generator (Abstraction Synthesis))
+  (do {! ///////phase.monad}
+    [[[function_module function_artifact] bodyO] (/////generation.with_new_context archive
+                                                   (do !
+                                                     [$self (\ ! map (|>> ///reference.artifact _.var)
+                                                               (/////generation.context archive))]
+                                                     (/////generation.with_anchor $self
+                                                       (expression archive bodyS))))
+     closureO+ (monad.map ! (expression archive) environment)
+     #let [arityO (|> arity .int _.int)
+           $num_args (_.var "num_args")
+           $self (_.var (///reference.artifact [function_module function_artifact]))
+           apply_poly (.function (_ args func)
+                        (_.apply (list func args) (_.var "do.call")))]]
+    (with_closure function_artifact $self closureO+
+      (_.set! $self (_.function (list _.var_args)
+                      ($_ _.then
+                          (_.set! $curried (_.list (list _.var_args)))
+                          (_.set! $num_args (_.length $curried))
+                          (_.cond (list [(|> $num_args (_.= arityO))
+                                         ($_ _.then
+                                             (_.set! (//case.register 0) $self)
+                                             (|> arity
+                                                 list.indices
+                                                 (list\map input_declaration)
+                                                 (list\fold _.then bodyO)))]
+                                        [(|> $num_args (_.> arityO))
+                                         (let [arity_args (_.slice (_.int +1) arityO $curried)
+                                               output_func_args (_.slice (|> arityO (_.+ (_.int +1)))
+                                                                         $num_args
+                                                                         $curried)]
+                                           (|> $self
+                                               (apply_poly arity_args)
+                                               (apply_poly output_func_args)))])
+                                  ## (|> $num_args (_.< arityO))
+                                  (let [$missing (_.var "missing")]
+                                    (_.function (list _.var_args)
+                                      ($_ _.then
+                                          (_.set! $missing (_.list (list _.var_args)))
+                                          (|> $self
+                                              (apply_poly (_.apply (list $curried $missing)
+                                                                   (_.var "append"))))))))))))
+    ))
diff --git a/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/loop.lux b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/loop.lux
new file mode 100644
index 000000000..c8f8bd1d5
--- /dev/null
+++ b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/loop.lux
@@ -0,0 +1,64 @@
+(.module:
+  [lux (#- Scope)
+   [abstract
+    ["." monad (#+ do)]]
+   [data
+    ["." product]
+    ["." text
+     ["%" format (#+ format)]]
+    [collection
+     ["." list ("#\." functor fold)]
+     ["." set (#+ Set)]]]
+   [math
+    [number
+     ["n" nat]]]
+   [target
+    ["_" r]]]
+  ["." // #_
+   [runtime (#+ Operation Phase Generator)]
+   ["#." case]
+   ["/#" // #_
+    ["#." reference]
+    ["/#" // #_
+     [synthesis
+      ["." case]]
+     ["/#" // #_
+      ["."synthesis (#+ Scope Synthesis)]
+      ["#." generation]
+      ["//#" /// #_
+       ["#." phase]
+       [meta
+        [archive (#+ Archive)]]
+       [reference
+        [variable (#+ Register)]]]]]]])
+
+(def: #export (scope expression archive [offset initsS+ bodyS])
+  (Generator (Scope Synthesis))
+  (case initsS+
+    ## function/false/non-independent loop
+    #.Nil
+    (expression archive bodyS)
+
+    ## true loop
+    _
+    (do {! ///////phase.monad}
+      [$scope (\ ! map _.var (/////generation.gensym "loop_scope"))
+       initsO+ (monad.map ! (expression archive) initsS+)
+       bodyO (/////generation.with_anchor $scope
+               (expression archive bodyS))]
+      (wrap (_.block
+             ($_ _.then
+                 (_.set! $scope
+                         (_.function (|> initsS+
+                                         list.size
+                                         list.indices
+                                         (list\map (|>> (n.+ offset) //case.register)))
+                           bodyO))
+                 (_.apply initsO+ $scope)))))))
+
+(def: #export (recur expression archive argsS+)
+  (Generator (List Synthesis))
+  (do {! ///////phase.monad}
+    [$scope /////generation.anchor
+     argsO+ (monad.map ! (expression archive) argsS+)]
+    (wrap (_.apply argsO+ $scope))))
diff --git a/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/primitive.lux b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/primitive.lux
new file mode 100644
index 000000000..efbd569f4
--- /dev/null
+++ b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/primitive.lux
@@ -0,0 +1,17 @@
+(.module:
+  [lux (#- i64)
+   [target
+    ["_" r (#+ Expression)]]]
+  ["." // #_
+   ["#." runtime]])
+
+(template [<name> <type> <code>]
+  [(def: #export <name>
+     (-> <type> Expression)
+     <code>)]
+
+  [bit  Bit       _.bool]
+  [i64  (I64 Any) (|>> .int //runtime.i64)]
+  [f64  Frac      _.float]
+  [text Text      _.string]
+  )
diff --git a/lux-r/source/luxc/lang/translation/r/procedure/common.jvm.lux b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/procedure/common.lux
index 85ccd90dc..85ccd90dc 100644
--- a/lux-r/source/luxc/lang/translation/r/procedure/common.jvm.lux
+++ b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/procedure/common.lux
diff --git a/lux-r/source/luxc/lang/translation/r/procedure/host.jvm.lux b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/procedure/host.lux
index 3bd33955f..3bd33955f 100644
--- a/lux-r/source/luxc/lang/translation/r/procedure/host.jvm.lux
+++ b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/procedure/host.lux
diff --git a/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/reference.lux b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/reference.lux
new file mode 100644
index 000000000..c3f2e8289
--- /dev/null
+++ b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/reference.lux
@@ -0,0 +1,12 @@
+(.module:
+  [lux #*
+   [target
+    ["_" r (#+ Expression)]]]
+  [///
+   [reference (#+ System)]])
+
+(structure: #export system
+  (System Expression)
+
+  (def: constant _.var)
+  (def: variable _.var))
diff --git a/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/runtime.lux b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/runtime.lux
new file mode 100644
index 000000000..1b7119378
--- /dev/null
+++ b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/runtime.lux
@@ -0,0 +1,848 @@
+(.module:
+  [lux (#- Location inc i64)
+   ["." meta]
+   [abstract
+    ["." monad (#+ do)]]
+   [control
+    ["." function]
+    ["<>" parser
+     ["<.>" code]]]
+   [data
+    ["." product]
+    ["." text ("#\." hash)
+     ["%" format (#+ format)]
+     [encoding
+      ["." utf8]]]
+    [collection
+     ["." list ("#\." functor)]
+     ["." row]]]
+   ["." macro
+    [syntax (#+ syntax:)]
+    ["." code]]
+   [math
+    [number (#+ hex)
+     ["n" nat]
+     ["i" int ("#\." interval)]
+     ["." i64]]]
+   ["@" target
+    ["_" r (#+ SVar Expression)]]]
+  ["." /// #_
+   ["#." reference]
+   ["//#" /// #_
+    [analysis (#+ Variant)]
+    ["#." synthesis (#+ Synthesis)]
+    ["#." generation]
+    ["//#" ///
+     ["#." phase]
+     [reference
+      [variable (#+ Register)]]
+     [meta
+      [archive (#+ Output Archive)
+       ["." artifact (#+ Registry)]]]]]])
+
+(def: module_id
+  0)
+
+(template [<name> <base>]
+  [(type: #export <name>
+     (<base> _.SVar _.Expression _.Expression))]
+
+  [Operation /////generation.Operation]
+  [Phase /////generation.Phase]
+  [Handler /////generation.Handler]
+  [Bundle /////generation.Bundle]
+  )
+
+(type: #export (Generator i)
+  (-> Phase Archive i (Operation Expression)))
+
+(def: #export unit
+  Expression
+  (_.string /////synthesis.unit))
+
+(def: full_32 (hex "FFFFFFFF"))
+(def: half_32 (hex "7FFFFFFF"))
+(def: post_32 (hex "100000000"))
+
+(def: (cap_32 input)
+  (-> Nat Int)
+  (cond (n.> full_32 input)
+        (|> input (i64.and full_32) cap_32)
+        
+        (n.> half_32 input)
+        (|> post_32 (n.- input) .int (i.* -1))
+        
+        ## else
+        (.int input)))
+
+(def: high_32
+  (-> Nat Nat)
+  (i64.right_shift 32))
+
+(def: low_32
+  (-> Nat Nat)
+  (|>> (i64.and (hex "FFFFFFFF"))))
+
+(def: #export i64_high_field "luxIH")
+(def: #export i64_low_field "luxIL")
+
+(def: #export (i64 value)
+  (-> Int Expression)
+  (let [value (.nat value)
+        high (|> value ..high_32 ..cap_32)
+        low (|> value ..low_32 ..cap_32)]
+    (_.named_list (list [..i64_high_field (_.int high)]
+                        [..i64_low_field (_.int low)]))))
+
+(def: #export variant_tag_field "luxVT")
+(def: #export variant_flag_field "luxVF")
+(def: #export variant_value_field "luxVV")
+
+(def: #export (flag value)
+  (-> Bit Expression)
+  (if value
+    (_.string "")
+    _.null))
+
+(def: (variant' tag last? value)
+  (-> Expression Expression Expression Expression)
+  (_.named_list (list [..variant_tag_field tag]
+                      [..variant_flag_field last?]
+                      [..variant_value_field value])))
+
+(def: #export (variant tag last? value)
+  (-> Nat Bit Expression Expression)
+  (variant' (_.int (.int tag))
+            (flag last?)
+            value))
+
+(def: #export none
+  Expression
+  (variant 0 #0 ..unit))
+
+(def: #export some
+  (-> Expression Expression)
+  (variant 1 #1))
+
+(def: #export left
+  (-> Expression Expression)
+  (variant 0 #0))
+
+(def: #export right
+  (-> Expression Expression)
+  (variant 1 #1))
+
+(syntax: #export (with_vars {vars (<code>.tuple (<>.some <code>.local_identifier))}
+                   body)
+  (do {! meta.monad}
+    [ids (monad.seq ! (list.repeat (list.size vars) meta.count))]
+    (wrap (list (` (let [(~+ (|> vars
+                                 (list.zip/2 ids)
+                                 (list\map (function (_ [id var])
+                                             (list (code.local_identifier var)
+                                                   (` (_.var (~ (code.text (format "v" (%.nat id)))))))))
+                                 list.concat))]
+                     (~ body)))))))
+
+(syntax: (runtime: {declaration (<>.or <code>.local_identifier
+                                       (<code>.form (<>.and <code>.local_identifier
+                                                            (<>.some <code>.local_identifier))))}
+           code)
+  (do meta.monad
+    [runtime_id meta.count]
+    (macro.with_gensyms [g!_]
+      (let [runtime (code.local_identifier (///reference.artifact [..module_id runtime_id]))
+            runtime_name (` (_.var (~ (code.text (%.code runtime)))))]
+        (case declaration
+          (#.Left name)
+          (let [g!name (code.local_identifier name)]
+            (wrap (list (` (def: #export (~ g!name)
+                             _.SVar
+                             (~ runtime_name)))
+                        
+                        (` (def: (~ (code.local_identifier (format "@" name)))
+                             _.Expression
+                             (_.set! (~ runtime_name) (~ code)))))))
+          
+          (#.Right [name inputs])
+          (let [g!name (code.local_identifier name)
+                inputsC (list\map code.local_identifier inputs)
+                inputs_typesC (list\map (function.constant (` _.Expression))
+                                        inputs)]
+            (wrap (list (` (def: #export ((~ g!name) (~+ inputsC))
+                             (-> (~+ inputs_typesC) _.Expression)
+                             (_.apply (list (~+ inputsC)) (~ runtime_name))))
+
+                        (` (def: (~ (code.local_identifier (format "@" name)))
+                             _.Expression
+                             (..with_vars [(~+ inputsC)]
+                               (_.set! (~ runtime_name)
+                                       (_.function (list (~+ inputsC))
+                                         (~ code))))))))))))))
+
+(def: high_shift (_.bit_shl (_.int +32)))
+
+(runtime: f2^32 (|> (_.int +2) (_.** (_.int +32))))
+(runtime: f2^63 (|> (_.int +2) (_.** (_.int +63))))
+
+(def: (as_double value)
+  (-> Expression Expression)
+  (_.apply (list value) (_.var "as.double")))
+
+(def: (as_integer value)
+  (-> Expression Expression)
+  (_.apply (list value) (_.var "as.integer")))
+
+(runtime: (i64::unsigned_low input)
+  (with_vars [low]
+    ($_ _.then
+        (_.set! low (|> input (_.nth (_.string ..i64_low_field))))
+        (_.if (|> low (_.>= (_.int +0)))
+          low
+          (|> low (_.+ f2^32))))))
+
+(runtime: (i64::to_float input)
+  (let [high (|> input
+                 (_.nth (_.string ..i64_high_field))
+                 high_shift)
+        low (|> input
+                i64::unsigned_low)]
+    (|> high (_.+ low) as_double)))
+
+(runtime: (i64::new high low)
+  (_.named_list (list [..i64_high_field (as_integer high)]
+                      [..i64_low_field (as_integer low)])))
+
+(template [<name> <value>]
+  [(runtime: <name>
+     (..i64 <value>))]
+
+  [i64::zero +0]
+  [i64::one +1]
+  [i64::min i\bottom]
+  [i64::max i\top]
+  )
+
+(def: #export i64_high (_.nth (_.string ..i64_high_field)))
+(def: #export i64_low (_.nth (_.string ..i64_low_field)))
+
+(runtime: (i64::not input)
+  (i64::new (|> input i64_high _.bit_not)
+            (|> input i64_low _.bit_not)))
+
+(runtime: (i64::+ param subject)
+  (with_vars [sH sL pH pL
+              x00 x16 x32 x48]
+    ($_ _.then
+        (_.set! sH (|> subject i64_high))
+        (_.set! sL (|> subject i64_low))
+        (_.set! pH (|> param i64_high))
+        (_.set! pL (|> param i64_low))
+        (let [bits16 (_.manual "0xFFFF")
+              move_top_16 (_.bit_shl (_.int +16))
+              top_16 (_.bit_ushr (_.int +16))
+              bottom_16 (_.bit_and bits16)
+              split_16 (function (_ source)
+                         [(|> source top_16)
+                          (|> source bottom_16)])
+              split_int (function (_ high low)
+                          [(split_16 high)
+                           (split_16 low)])
+              
+              [[s48 s32] [s16 s00]] (split_int sH sL)
+              [[p48 p32] [p16 p00]] (split_int pH pL)
+              new_half (function (_ top bottom)
+                         (|> top bottom_16 move_top_16
+                             (_.bit_or (bottom_16 bottom))))]
+          ($_ _.then
+              (_.set! x00 (|> s00 (_.+ p00)))
+              (_.set! x16 (|> x00 top_16 (_.+ s16) (_.+ p16)))
+              (_.set! x32 (|> x16 top_16 (_.+ s32) (_.+ p32)))
+              (_.set! x48 (|> x32 top_16 (_.+ s48) (_.+ p48)))
+              (i64::new (new_half x48 x32)
+                        (new_half x16 x00)))))))
+
+(runtime: (i64::= reference sample)
+  (let [n/a? (function (_ value)
+               (_.apply (list value) (_.var "is.na")))
+        isTRUE? (function (_ value)
+                  (_.apply (list value) (_.var "isTRUE")))
+        comparison (: (-> (-> Expression Expression) Expression)
+                      (function (_ field)
+                        (|> (|> (field sample) (_.= (field reference)))
+                            (_.or (|> (n/a? (field sample))
+                                      (_.and (n/a? (field reference))))))))]
+    (|> (comparison i64_high)
+        (_.and (comparison i64_low))
+        isTRUE?)))
+
+(runtime: (i64::negate input)
+  (_.if (|> input (i64::= i64::min))
+    i64::min
+    (|> input i64::not (i64::+ i64::one))))
+
+(runtime: i64::-one
+  (i64::negate i64::one))
+
+(runtime: (i64::- param subject)
+  (i64::+ (i64::negate param) subject))
+
+(runtime: (i64::< reference sample)
+  (with_vars [r_? s_?]
+    ($_ _.then
+        (_.set! s_? (|> sample i64_high (_.< (_.int +0))))
+        (_.set! r_? (|> reference i64_high (_.< (_.int +0))))
+        (|> (|> s_? (_.and (_.not r_?)))
+            (_.or (|> (_.not s_?) (_.and r_?) _.not))
+            (_.or (|> sample
+                      (i64::- reference)
+                      i64_high
+                      (_.< (_.int +0))))))))
+
+(runtime: (i64::from_float input)
+  (_.cond (list [(_.apply (list input) (_.var "is.nan"))
+                 i64::zero]
+                [(|> input (_.<= (_.negate f2^63)))
+                 i64::min]
+                [(|> input (_.+ (_.float +1.0)) (_.>= f2^63))
+                 i64::max]
+                [(|> input (_.< (_.float +0.0)))
+                 (|> input _.negate i64::from_float i64::negate)])
+          (i64::new (|> input (_./ f2^32))
+                    (|> input (_.%% f2^32)))))
+
+(runtime: (i64::* param subject)
+  (with_vars [sH sL pH pL
+              x00 x16 x32 x48]
+    ($_ _.then
+        (_.set! sH (|> subject i64_high))
+        (_.set! pH (|> param i64_high))
+        (let [negative_subject? (|> sH (_.< (_.int +0)))
+              negative_param? (|> pH (_.< (_.int +0)))]
+          (_.cond (list [negative_subject?
+                         (_.if negative_param?
+                           (i64::* (i64::negate param)
+                                   (i64::negate subject))
+                           (i64::negate (i64::* param
+                                                (i64::negate subject))))]
+
+                        [negative_param?
+                         (i64::negate (i64::* (i64::negate param)
+                                              subject))])
+                  ($_ _.then
+                      (_.set! sL (|> subject i64_low))
+                      (_.set! pL (|> param i64_low))
+                      (let [bits16 (_.manual "0xFFFF")
+                            move_top_16 (_.bit_shl (_.int +16))
+                            top_16 (_.bit_ushr (_.int +16))
+                            bottom_16 (_.bit_and bits16)
+                            split_16 (function (_ source)
+                                       [(|> source top_16)
+                                        (|> source bottom_16)])
+                            split_int (function (_ high low)
+                                        [(split_16 high)
+                                         (split_16 low)])
+                            new_half (function (_ top bottom)
+                                       (|> top bottom_16 move_top_16
+                                           (_.bit_or (bottom_16 bottom))))
+                            x16_top (|> x16 top_16)
+                            x32_top (|> x32 top_16)]
+                        (with_vars [s48 s32 s16 s00
+                                    p48 p32 p16 p00]
+                          (let [[[_s48 _s32] [_s16 _s00]] (split_int sH sL)
+                                [[_p48 _p32] [_p16 _p00]] (split_int pH pL)
+                                set_subject_chunks! ($_ _.then (_.set! s48 _s48) (_.set! s32 _s32) (_.set! s16 _s16) (_.set! s00 _s00))
+                                set_param_chunks! ($_ _.then (_.set! p48 _p48) (_.set! p32 _p32) (_.set! p16 _p16) (_.set! p00 _p00))]
+                            ($_ _.then
+                                set_subject_chunks!
+                                set_param_chunks!
+                                (_.set! x00 (|> s00 (_.* p00)))
+                                (_.set! x16 (|> x00 top_16 (_.+ (|> s16 (_.* p00)))))
+                                (_.set! x32 x16_top)
+                                (_.set! x16 (|> x16 bottom_16 (_.+ (|> s00 (_.* p16)))))
+                                (_.set! x32 (|> x32 (_.+ x16_top) (_.+ (|> s32 (_.* p00)))))
+                                (_.set! x48 x32_top)
+                                (_.set! x32 (|> x32 bottom_16 (_.+ (|> s16 (_.* p16)))))
+                                (_.set! x48 (|> x48 (_.+ x32_top)))
+                                (_.set! x32 (|> x32 bottom_16 (_.+ (|> s00 (_.* p32)))))
+                                (_.set! x48 (|> x48 (_.+ x32_top)
+                                                (_.+ (|> s48 (_.* p00)))
+                                                (_.+ (|> s32 (_.* p16)))
+                                                (_.+ (|> s16 (_.* p32)))
+                                                (_.+ (|> s00 (_.* p48)))))
+                                (i64::new (new_half x48 x32)
+                                          (new_half x16 x00)))))
+                        )))))))
+
+(def: (limit_shift! shift)
+  (-> SVar Expression)
+  (_.set! shift (|> shift (_.bit_and (_.int +63)))))
+
+(def: (no_shift_clause shift input)
+  (-> SVar SVar [Expression Expression])
+  [(|> shift (_.= (_.int +0)))
+   input])
+
+(runtime: (i64::left_shift shift input)
+  ($_ _.then
+      (limit_shift! shift)
+      (_.cond (list (no_shift_clause shift input)
+                    [(|> shift (_.< (_.int +32)))
+                     (let [mid (|> (i64_low input) (_.bit_ushr (|> (_.int +32) (_.- shift))))
+                           high (|> (i64_high input)
+                                    (_.bit_shl shift)
+                                    (_.bit_or mid))
+                           low (|> (i64_low input)
+                                   (_.bit_shl shift))]
+                       (i64::new high low))])
+              (let [high (|> (i64_high input)
+                             (_.bit_shl (|> shift (_.- (_.int +32)))))]
+                (i64::new high (_.int +0))))))
+
+(runtime: (i64::arithmetic_right_shift_32 shift input)
+  (let [top_bit (|> input (_.bit_and (_.int (hex "+80000000"))))]
+    (|> input
+        (_.bit_ushr shift)
+        (_.bit_or top_bit))))
+
+(runtime: (i64::arithmetic_right_shift shift input)
+  ($_ _.then
+      (limit_shift! shift)
+      (_.cond (list (no_shift_clause shift input)
+                    [(|> shift (_.< (_.int +32)))
+                     (let [mid (|> (i64_high input) (_.bit_shl (|> (_.int +32) (_.- shift))))
+                           high (|> (i64_high input)
+                                    (i64::arithmetic_right_shift_32 shift))
+                           low (|> (i64_low input)
+                                   (_.bit_ushr shift)
+                                   (_.bit_or mid))]
+                       (i64::new high low))])
+              (let [low (|> (i64_high input)
+                            (i64::arithmetic_right_shift_32 (|> shift (_.- (_.int +32)))))
+                    high (_.if (|> (i64_high input) (_.>= (_.int +0)))
+                           (_.int +0)
+                           (_.int -1))]
+                (i64::new high low)))))
+
+(runtime: (i64::/ param subject)
+  (let [negative? (|>> (i64::< i64::zero))
+        valid_division_check [(|> param (i64::= i64::zero))
+                              (_.stop (_.string "Cannot divide by zero!"))]
+        short_circuit_check [(|> subject (i64::= i64::zero))
+                             i64::zero]]
+    (_.cond (list valid_division_check
+                  short_circuit_check
+
+                  [(|> subject (i64::= i64::min))
+                   (_.cond (list [(|> (|> param (i64::= i64::one))
+                                      (_.or (|> param (i64::= i64::-one))))
+                                  i64::min]
+                                 [(|> param (i64::= i64::min))
+                                  i64::one])
+                           (with_vars [approximation]
+                             ($_ _.then
+                                 (_.set! approximation
+                                         (|> subject
+                                             (i64::arithmetic_right_shift (_.int +1))
+                                             (i64::/ param)
+                                             (i64::left_shift (_.int +1))))
+                                 (_.if (|> approximation (i64::= i64::zero))
+                                   (_.if (negative? param)
+                                     i64::one
+                                     i64::-one)
+                                   (let [remainder (i64::- (i64::* param approximation)
+                                                           subject)]
+                                     (|> remainder
+                                         (i64::/ param)
+                                         (i64::+ approximation)))))))]
+                  [(|> param (i64::= i64::min))
+                   i64::zero]
+
+                  [(negative? subject)
+                   (_.if (negative? param)
+                     (|> (i64::negate subject)
+                         (i64::/ (i64::negate param)))
+                     (|> (i64::negate subject)
+                         (i64::/ param)
+                         i64::negate))]
+
+                  [(negative? param)
+                   (|> param
+                       i64::negate
+                       (i64::/ subject)
+                       i64::negate)])
+            (with_vars [result remainder approximate approximate_result log2 approximate_remainder]
+              ($_ _.then
+                  (_.set! result i64::zero)
+                  (_.set! remainder subject)
+                  (_.while (|> (|> remainder (i64::< param))
+                               (_.or (|> remainder (i64::= param))))
+                           (let [calc_rough_estimate (_.apply (list (|> (i64::to_float remainder) (_./ (i64::to_float param))))
+                                                              (_.var "floor"))
+                                 calc_approximate_result (i64::from_float approximate)
+                                 calc_approximate_remainder (|> approximate_result (i64::* param))
+                                 delta (_.if (|> (_.float +48.0) (_.<= log2))
+                                         (_.float +1.0)
+                                         (_.** (|> log2 (_.- (_.float +48.0)))
+                                               (_.float +2.0)))]
+                             ($_ _.then
+                                 (_.set! approximate (_.apply (list (_.float +1.0) calc_rough_estimate)
+                                                              (_.var "max")))
+                                 (_.set! log2 (let [log (function (_ input)
+                                                          (_.apply (list input) (_.var "log")))]
+                                                (_.apply (list (|> (log (_.int +2))
+                                                                   (_./ (log approximate))))
+                                                         (_.var "ceil"))))
+                                 (_.set! approximate_result calc_approximate_result)
+                                 (_.set! approximate_remainder calc_approximate_remainder)
+                                 (_.while (|> (negative? approximate_remainder)
+                                              (_.or (|> approximate_remainder (i64::< remainder))))
+                                          ($_ _.then
+                                              (_.set! approximate (|> delta (_.- approximate)))
+                                              (_.set! approximate_result calc_approximate_result)
+                                              (_.set! approximate_remainder calc_approximate_remainder)))
+                                 (_.set! result (|> (_.if (|> approximate_result (i64::= i64::zero))
+                                                      i64::one
+                                                      approximate_result)
+                                                    (i64::+ result)))
+                                 (_.set! remainder (|> remainder (i64::- approximate_remainder))))))
+                  result))
+            )))
+
+(runtime: (i64::% param subject)
+  (let [flat (|> subject (i64::/ param) (i64::* param))]
+    (|> subject (i64::- flat))))
+
+(runtime: (lux::try op)
+  (with_vars [error value]
+    (_.try ($_ _.then
+               (_.set! value (_.apply (list ..unit) op))
+               (..right value))
+           #.None
+           (#.Some (_.function (list error)
+                     (..left (_.nth (_.string "message")
+                                    error))))
+           #.None)))
+
+(runtime: (lux::program_args program_args)
+  (with_vars [inputs value]
+    ($_ _.then
+        (_.set! inputs ..none)
+        (<| (_.for_in value program_args)
+            (_.set! inputs (..some (_.list (list value inputs)))))
+        inputs)))
+
+(def: runtime::lux
+  Expression
+  ($_ _.then
+      @lux::try
+      @lux::program_args
+      ))
+
+(def: current_time_float
+  Expression
+  (let [raw_time (_.apply (list) (_.var "Sys.time"))]
+    (_.apply (list raw_time) (_.var "as.numeric"))))
+
+(runtime: (io::current_time! _)
+  (|> current_time_float
+      (_.* (_.float +1,000.0))
+      i64::from_float))
+
+(def: runtime::io
+  Expression
+  ($_ _.then
+      @io::current_time!
+      ))
+
+(def: minimum_index_length
+  (-> SVar Expression)
+  (|>> (_.+ (_.int +1))))
+
+(def: (product_element product index)
+  (-> Expression Expression Expression)
+  (|> product (_.nth (|> index (_.+ (_.int +1))))))
+
+(def: (product_tail product)
+  (-> SVar Expression)
+  (|> product (_.nth (_.length product))))
+
+(def: (updated_index min_length product)
+  (-> Expression Expression Expression)
+  (|> min_length (_.- (_.length product))))
+
+(runtime: (tuple::left index product)
+  (let [$index_min_length (_.var "index_min_length")]
+    ($_ _.then
+        (_.set! $index_min_length (minimum_index_length index))
+        (_.if (|> (_.length product) (_.> $index_min_length))
+          ## No need for recursion
+          (product_element product index)
+          ## Needs recursion
+          (tuple::left (updated_index $index_min_length product)
+                       (product_tail product))))))
+
+(runtime: (tuple::right index product)
+  (let [$index_min_length (_.var "index_min_length")]
+    ($_ _.then
+        (_.set! $index_min_length (minimum_index_length index))
+        (_.cond (list [## Last element.
+                       (|> (_.length product) (_.= $index_min_length))
+                       (product_element product index)]
+                      [## Needs recursion
+                       (|> (_.length product) (_.< $index_min_length))
+                       (tuple::right (updated_index $index_min_length product)
+                                     (product_tail product))])
+                ## Must slice
+                (|> product (_.slice_from index))))))
+
+(runtime: (sum::get sum wants_last? wanted_tag)
+  (let [no_match _.null
+        sum_tag (|> sum (_.nth (_.string ..variant_tag_field)))
+        sum_flag (|> sum (_.nth (_.string ..variant_flag_field)))
+        sum_value (|> sum (_.nth (_.string ..variant_value_field)))
+        is_last? (|> sum_flag (_.= (_.string "")))
+        test_recursion (_.if is_last?
+                         ## Must recurse.
+                         (|> wanted_tag
+                             (_.- sum_tag)
+                             (sum::get sum_value wants_last?))
+                         no_match)]
+    (_.cond (list [(_.= sum_tag wanted_tag)
+                   (_.if (_.= wants_last? sum_flag)
+                     sum_value
+                     test_recursion)]
+
+                  [(|> wanted_tag (_.> sum_tag))
+                   test_recursion]
+
+                  [(|> (|> wants_last? (_.= (_.string "")))
+                       (_.and (|> wanted_tag (_.< sum_tag))))
+                   (variant' (|> sum_tag (_.- wanted_tag)) sum_flag sum_value)])
+
+            no_match)))
+
+(def: runtime::adt
+  Expression
+  ($_ _.then
+      @tuple::left
+      @tuple::right
+      @sum::get
+      ))
+
+(template [<name> <op>]
+  [(runtime: (<name> mask input)
+     (i64::new (<op> (i64_high mask)
+                     (i64_high input))
+               (<op> (i64_low mask)
+                     (i64_low input))))]
+
+  [i64::and _.bit_and]
+  [i64::or  _.bit_or]
+  [i64::xor _.bit_xor]
+  )
+
+(runtime: (i64::right_shift shift input)
+  ($_ _.then
+      (limit_shift! shift)
+      (_.cond (list (no_shift_clause shift input)
+                    [(|> shift (_.< (_.int +32)))
+                     (with_vars [$mid]
+                       (let [mid (|> (i64_high input) (_.bit_shl (|> (_.int +32) (_.- shift))))
+                             high (|> (i64_high input) (_.bit_ushr shift))
+                             low (|> (i64_low input)
+                                     (_.bit_ushr shift)
+                                     (_.bit_or (_.if (_.apply (list $mid) (_.var "is.na"))
+                                                 (_.int +0)
+                                                 $mid)))]
+                         ($_ _.then
+                             (_.set! $mid mid)
+                             (i64::new high low))))]
+                    [(|> shift (_.= (_.int +32)))
+                     (let [high (i64_high input)]
+                       (i64::new (_.int +0) high))])
+              (let [low (|> (i64_high input) (_.bit_ushr (|> shift (_.- (_.int +32)))))]
+                (i64::new (_.int +0) low)))))
+
+(def: runtime::i64
+  Expression
+  ($_ _.then
+      @i64::zero
+      @i64::one
+      @i64::min
+      @i64::max
+      @i64::=
+      @i64::<
+      @i64::+
+      @i64::-
+      @i64::negate
+      @i64::-one
+      @i64::unsigned_low
+      @i64::to_float
+      @i64::*
+      @i64::/
+      @i64::%
+
+      @i64::and
+      @i64::or
+      @i64::xor
+      @i64::not
+      @i64::left_shift
+      @i64::arithmetic_right_shift_32
+      @i64::arithmetic_right_shift
+      @i64::right_shift
+      ))
+
+(runtime: (frac::decode input)
+  (with_vars [output]
+    ($_ _.then
+        (_.set! output (_.apply (list input) (_.var "as.numeric")))
+        (_.if (|> output (_.= _.n/a))
+          ..none
+          (..some output)))))
+
+(def: runtime::frac
+  Expression
+  ($_ _.then
+      @frac::decode
+      ))
+
+(def: inc
+  (-> Expression Expression)
+  (|>> (_.+ (_.int +1))))
+
+(template [<name> <top_cmp>]
+  [(def: (<name> top value)
+     (-> Expression Expression Expression)
+     (|> (|> value (_.>= (_.int +0)))
+         (_.and (|> value (<top_cmp> top)))))]
+
+  [within? _.<]
+  [up_to?  _.<=]
+  )
+
+(def: (text_clip start end text)
+  (-> Expression Expression Expression Expression)
+  (_.apply (list text start end)
+           (_.var "substr")))
+
+(def: (text_length text)
+  (-> Expression Expression)
+  (_.apply (list text) (_.var "nchar")))
+
+(runtime: (text::index subject param start)
+  (with_vars [idx startF subjectL]
+    ($_ _.then
+        (_.set! startF (i64::to_float start))
+        (_.set! subjectL (text_length subject))
+        (_.if (|> startF (within? subjectL))
+          ($_ _.then
+              (_.set! idx (|> (_.apply_kw (list param (_.if (|> startF (_.= (_.int +0)))
+                                                        subject
+                                                        (text_clip (inc startF)
+                                                                   (inc subjectL)
+                                                                   subject)))
+                                          (list ["fixed" (_.bool #1)])
+                                          (_.var "regexpr"))
+                              (_.nth (_.int +1))))
+              (_.if (|> idx (_.= (_.int -1)))
+                ..none
+                (..some (i64::from_float (|> idx (_.+ startF))))))
+          ..none))))
+
+(runtime: (text::clip text from to)
+  (with_vars [length]
+    ($_ _.then
+        (_.set! length (_.length text))
+        (_.if ($_ _.and
+                  (|> to (within? length))
+                  (|> from (up_to? to)))
+          (..some (text_clip (inc from) (inc to) text))
+          ..none))))
+
+(def: (char_at idx text)
+  (-> Expression Expression Expression)
+  (_.apply (list (text_clip idx idx text))
+           (_.var "utf8ToInt")))
+
+(runtime: (text::char text idx)
+  (_.if (|> idx (within? (_.length text)))
+    ($_ _.then
+        (_.set! idx (inc idx))
+        (..some (i64::from_float (char_at idx text))))
+    ..none))
+
+(def: runtime::text
+  Expression
+  ($_ _.then
+      @text::index
+      @text::clip
+      @text::char
+      ))
+
+(def: (check_index_out_of_bounds array idx body)
+  (-> Expression Expression Expression Expression)
+  (_.if (|> idx (_.<= (_.length array)))
+    body
+    (_.stop (_.string "Array index out of bounds!"))))
+
+(runtime: (array::new size)
+  (with_vars [output]
+    ($_ _.then
+        (_.set! output (_.list (list)))
+        (_.set_nth! (|> size (_.+ (_.int +1)))
+                    _.null
+                    output)
+        output)))
+
+(runtime: (array::get array idx)
+  (with_vars [temp]
+    (<| (check_index_out_of_bounds array idx)
+        ($_ _.then
+            (_.set! temp (|> array (_.nth (_.+ (_.int +1) idx))))
+            (_.if (|> temp (_.= _.null))
+              ..none
+              (..some temp))))))
+
+(runtime: (array::put array idx value)
+  (<| (check_index_out_of_bounds array idx)
+      ($_ _.then
+          (_.set_nth! (_.+ (_.int +1) idx) value array)
+          array)))
+
+(def: runtime::array
+  Expression
+  ($_ _.then
+      @array::new
+      @array::get
+      @array::put
+      ))
+
+(def: runtime
+  Expression
+  ($_ _.then
+      runtime::lux
+      @f2^32
+      @f2^63
+      @i64::new
+      @i64::from_float
+      runtime::i64
+      runtime::adt
+      runtime::frac
+      runtime::text
+      runtime::array
+      runtime::io
+      ))
+
+(def: #export generate
+  (Operation [Registry Output])
+  (do ///////phase.monad
+    [_ (/////generation.execute! ..runtime)
+     _ (/////generation.save! (%.nat ..module_id) ..runtime)]
+    (wrap [(|> artifact.empty
+               artifact.resource
+               product.right)
+           (row.row [(%.nat ..module_id)
+                     (|> ..runtime
+                         _.code
+                         (\ utf8.codec encode))])])))
diff --git a/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/structure.lux b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/structure.lux
new file mode 100644
index 000000000..5f4703836
--- /dev/null
+++ b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/r/structure.lux
@@ -0,0 +1,39 @@
+(.module:
+  [lux #*
+   [abstract
+    ["." monad (#+ do)]]
+   [data
+    [collection
+     ["." list]]]
+   [target
+    ["_" r (#+ Expression)]]]
+  ["." // #_
+   ["#." runtime (#+ Operation Phase Generator)]
+   ["#." primitive]
+   ["///#" //// #_
+    [analysis (#+ Variant Tuple)]
+    ["#." synthesis (#+ Synthesis)]
+    ["//#" /// #_
+     ["#." phase ("#\." monad)]]]])
+
+(def: #export (tuple expression archive elemsS+)
+  (Generator (Tuple Synthesis))
+  (case elemsS+
+    #.Nil
+    (///////phase\wrap (//primitive.text /////synthesis.unit))
+
+    (#.Cons singletonS #.Nil)
+    (expression archive singletonS)
+
+    _
+    (|> elemsS+
+        (monad.map ///////phase.monad (expression archive))
+        (///////phase\map _.list))))
+
+(def: #export (variant expression archive [lefts right? valueS])
+  (Generator (Variant Synthesis))
+  (let [tag (if right?
+              (inc lefts)
+              lefts)]
+    (///////phase\map (|>> (//runtime.variant tag right?))
+                      (expression archive valueS))))
diff --git a/stdlib/source/lux/tool/compiler/language/lux/phase/generation/scheme.lux b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/scheme.lux
index be476cf74..1a36df4e0 100644
--- a/stdlib/source/lux/tool/compiler/language/lux/phase/generation/scheme.lux
+++ b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/scheme.lux
@@ -2,8 +2,6 @@
   [lux #*
    [abstract
     [monad (#+ do)]]
-   [control
-    ["." exception (#+ exception:)]]
    [target
     ["_" scheme]]]
   ["." / #_
diff --git a/stdlib/source/lux/tool/compiler/language/lux/phase/generation/scheme/function.lux b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/scheme/function.lux
index 380352c5b..65c674ded 100644
--- a/stdlib/source/lux/tool/compiler/language/lux/phase/generation/scheme/function.lux
+++ b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/scheme/function.lux
@@ -89,8 +89,7 @@
                                                      output_func_args (//runtime.slice arityO
                                                                                        (|> @num_args (_.-/2 arityO))
                                                                                        @curried)]
-                                                 (_.begin (list ## (_.display/1 (_.string (format "!!! PRE [slice]" text.new_line)))
-                                                                (|> @self
+                                                 (_.begin (list (|> @self
                                                                     (apply_poly arity_args)
                                                                     (apply_poly output_func_args))))))
                                              ## (|> @num_args (_.</2 arityO))
diff --git a/stdlib/source/lux/tool/compiler/language/lux/phase/generation/scheme/loop.lux b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/scheme/loop.lux
index 633b0da5a..d4b964910 100644
--- a/stdlib/source/lux/tool/compiler/language/lux/phase/generation/scheme/loop.lux
+++ b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/scheme/loop.lux
@@ -13,7 +13,7 @@
     [number
      ["n" nat]]]
    [target
-    ["_" scheme (#+ Computation Var)]]]
+    ["_" scheme]]]
   ["." // #_
    [runtime (#+ Operation Phase Generator)]
    ["#." case]
diff --git a/stdlib/source/lux/tool/compiler/language/lux/phase/generation/scheme/runtime.lux b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/scheme/runtime.lux
index 612cb3153..7f55df9a9 100644
--- a/stdlib/source/lux/tool/compiler/language/lux/phase/generation/scheme/runtime.lux
+++ b/stdlib/source/lux/tool/compiler/language/lux/phase/generation/scheme/runtime.lux
@@ -11,7 +11,8 @@
     ["." product]
     ["." text ("#\." hash)
      ["%" format (#+ format)]
-     ["." encoding]]
+     [encoding
+      ["." utf8]]]
     [collection
      ["." list ("#\." functor)]
      ["." row]]]
@@ -365,4 +366,4 @@
            (row.row [(%.nat ..module_id)
                      (|> ..runtime
                          _.code
-                         (\ encoding.utf8 encode))])])))
+                         (\ utf8.codec encode))])])))
diff --git a/stdlib/source/lux/tool/compiler/meta/io/context.lux b/stdlib/source/lux/tool/compiler/meta/io/context.lux
index 6c44c026a..3bb388f5e 100644
--- a/stdlib/source/lux/tool/compiler/meta/io/context.lux
+++ b/stdlib/source/lux/tool/compiler/meta/io/context.lux
@@ -15,7 +15,8 @@
     [binary (#+ Binary)]
     ["." text ("#\." hash)
      ["%" format (#+ format)]
-     ["." encoding]]
+     [encoding
+      ["." utf8]]]
     [collection
      ["." dictionary (#+ Dictionary)]]]
    [world
@@ -127,7 +128,7 @@
       (Promise (Try Input)))
   (do (try.with promise.monad)
     [[path binary] (..find_any_source_file system import contexts partial_host_extension module)]
-    (case (\ encoding.utf8 decode binary)
+    (case (\ utf8.codec decode binary)
       (#try.Success code)
       (wrap {#////.module module
              #////.file path
diff --git a/stdlib/source/lux/tool/compiler/meta/packager/script.lux b/stdlib/source/lux/tool/compiler/meta/packager/script.lux
index e8685ce2b..c23688a9e 100644
--- a/stdlib/source/lux/tool/compiler/meta/packager/script.lux
+++ b/stdlib/source/lux/tool/compiler/meta/packager/script.lux
@@ -12,7 +12,8 @@
     ["." product]
     [text
      ["%" format (#+ format)]
-     ["." encoding]]
+     [encoding 
+      ["." utf8]]]
     [collection
      ["." row]
      ["." list ("#\." functor)]]]
@@ -49,7 +50,7 @@
       (monad.fold try.monad
                   (function (_ content so_far)
                     (|> content
-                        (\ encoding.utf8 decode)
+                        (\ utf8.codec decode)
                         (\ try.monad map
                            (function (_ content)
                              (sequence so_far
@@ -75,4 +76,4 @@
           (list\map (function (_ [module [module_id [descriptor document output]]])
                       [module_id output]))
           (monad.fold ! (..write_module sequence) header)
-          (\ ! map (|>> scope to_code (\ encoding.utf8 encode)))))))
+          (\ ! map (|>> scope to_code (\ utf8.codec encode)))))))