From 9c21fd1f33eb52fb971d493ad21a67036d68b841 Mon Sep 17 00:00:00 2001
From: Eduardo Julian
Date: Sun, 12 Jun 2022 02:29:28 -0400
Subject: Re-named the "poly" hierarchy to "polytypic".

---
 stdlib/source/poly/lux/abstract/equivalence.lux | 167 ------------
 stdlib/source/poly/lux/abstract/functor.lux     | 110 --------
 stdlib/source/poly/lux/data/format/json.lux     | 335 ------------------------
 3 files changed, 612 deletions(-)
 delete mode 100644 stdlib/source/poly/lux/abstract/equivalence.lux
 delete mode 100644 stdlib/source/poly/lux/abstract/functor.lux
 delete mode 100644 stdlib/source/poly/lux/data/format/json.lux

(limited to 'stdlib/source/poly')

diff --git a/stdlib/source/poly/lux/abstract/equivalence.lux b/stdlib/source/poly/lux/abstract/equivalence.lux
deleted file mode 100644
index 1e882e32d..000000000
--- a/stdlib/source/poly/lux/abstract/equivalence.lux
+++ /dev/null
@@ -1,167 +0,0 @@
-(.using
- [library
-  [lux (.except)
-   [abstract
-    [monad (.only Monad do)]]
-   [control
-    ["[0]" maybe]
-    ["<>" parser (.only)
-     ["<[0]>" type]]]
-   [data
-    ["[0]" product]
-    ["[0]" bit]
-    ["[0]" text (.open: "[1]#[0]" monoid)
-     ["%" format (.only format)]]
-    [collection
-     ["[0]" list (.open: "[1]#[0]" monad)]
-     ["[0]" sequence]
-     ["[0]" array]
-     ["[0]" queue]
-     ["[0]" set]
-     ["[0]" dictionary (.only Dictionary)]
-     ["[0]" tree]]]
-   [macro
-    ["[0]" code]]
-   [math
-    [number
-     ["[0]" nat (.open: "[1]#[0]" decimal)]
-     ["[0]" int]
-     ["[0]" rev]
-     ["[0]" frac]]]
-   [time
-    ["[0]" duration]
-    ["[0]" date]
-    ["[0]" instant]
-    ["[0]" day]
-    ["[0]" month]]
-   ["[0]" type (.only)
-    ["[0]" poly (.only poly:)]
-    ["[0]" unit]]]]
- [\\library
-  ["[0]" /]])
-
-(poly: .public equivalence
-  (`` (do [! <>.monad]
-        [.let [g!_ (code.local "_____________")]
-         *env* <type>.env
-         inputT <type>.next
-         .let [@Equivalence (is (-> Type Code)
-                                (function (_ type)
-                                  (` ((~! /.Equivalence) (~ (poly.code *env* type))))))]]
-        (all <>.either
-             ... Basic types
-             (~~ (with_template [<matcher> <eq>]
-                   [(do !
-                      [_ <matcher>]
-                      (in (` (is (~ (@Equivalence inputT))
-                                 <eq>))))]
-
-                   [(<type>.exactly Any) (function ((~ g!_) (~ g!_) (~ g!_)) #1)]
-                   [(<type>.sub Bit)     (~! bit.equivalence)]
-                   [(<type>.sub Nat)     (~! nat.equivalence)]
-                   [(<type>.sub Int)     (~! int.equivalence)]
-                   [(<type>.sub Rev)     (~! rev.equivalence)]
-                   [(<type>.sub Frac)    (~! frac.equivalence)]
-                   [(<type>.sub Text)    (~! text.equivalence)]))
-             ... Composite types
-             (~~ (with_template [<name> <eq>]
-                   [(do !
-                      [[_ argC] (<type>.applied (<>.and (<type>.exactly <name>)
-                                                        equivalence))]
-                      (in (` (is (~ (@Equivalence inputT))
-                                 (<eq> (~ argC))))))]
-
-                   [.Maybe            (~! maybe.equivalence)]
-                   [.List             (~! list.equivalence)]
-                   [sequence.Sequence (~! sequence.equivalence)]
-                   [array.Array       (~! array.equivalence)]
-                   [queue.Queue       (~! queue.equivalence)]
-                   [set.Set           (~! set.equivalence)]
-                   [tree.Tree         (~! tree.equivalence)]
-                   ))
-             (do !
-               [[_ _ valC] (<type>.applied (all <>.and
-                                                (<type>.exactly dictionary.Dictionary)
-                                                <type>.any
-                                                equivalence))]
-               (in (` (is (~ (@Equivalence inputT))
-                          ((~! dictionary.equivalence) (~ valC))))))
-             ... Models
-             (~~ (with_template [<type> <eq>]
-                   [(do !
-                      [_ (<type>.exactly <type>)]
-                      (in (` (is (~ (@Equivalence inputT))
-                                 <eq>))))]
-
-                   [duration.Duration duration.equivalence]
-                   [instant.Instant instant.equivalence]
-                   [date.Date date.equivalence]
-                   [day.Day day.equivalence]
-                   [month.Month month.equivalence]
-                   ))
-             (do !
-               [_ (<type>.applied (<>.and (<type>.exactly unit.Qty)
-                                          <type>.any))]
-               (in (` (is (~ (@Equivalence inputT))
-                          unit.equivalence))))
-             ... Variants
-             (do !
-               [members (<type>.variant (<>.many equivalence))
-                .let [last (-- (list.size members))
-                      g!_ (code.local "_____________")
-                      g!left (code.local "_____________left")
-                      g!right (code.local "_____________right")]]
-               (in (` (is (~ (@Equivalence inputT))
-                          (function ((~ g!_) (~ g!left) (~ g!right))
-                            (case [(~ g!left) (~ g!right)]
-                              (~+ (list#conjoint (list#each (function (_ [tag g!eq])
-                                                              (if (nat.= last tag)
-                                                                (list (` [{(~ (code.nat (-- tag))) #1 (~ g!left)}
-                                                                          {(~ (code.nat (-- tag))) #1 (~ g!right)}])
-                                                                      (` ((~ g!eq) (~ g!left) (~ g!right))))
-                                                                (list (` [{(~ (code.nat tag)) #0 (~ g!left)}
-                                                                          {(~ (code.nat tag)) #0 (~ g!right)}])
-                                                                      (` ((~ g!eq) (~ g!left) (~ g!right))))))
-                                                            (list.enumeration members))))
-                              (~ g!_)
-                              #0))))))
-             ... Tuples
-             (do !
-               [g!eqs (<type>.tuple (<>.many equivalence))
-                .let [g!_ (code.local "_____________")
-                      indices (list.indices (list.size g!eqs))
-                      g!lefts (list#each (|>> nat#encoded (text#composite "left") code.local) indices)
-                      g!rights (list#each (|>> nat#encoded (text#composite "right") code.local) indices)]]
-               (in (` (is (~ (@Equivalence inputT))
-                          (function ((~ g!_) [(~+ g!lefts)] [(~+ g!rights)])
-                            (and (~+ (|> (list.zipped_3 g!eqs g!lefts g!rights)
-                                         (list#each (function (_ [g!eq g!left g!right])
-                                                      (` ((~ g!eq) (~ g!left) (~ g!right)))))))))))))
-             ... Type recursion
-             (do !
-               [[g!self bodyC] (<type>.recursive equivalence)
-                .let [g!_ (code.local "_____________")]]
-               (in (` (is (~ (@Equivalence inputT))
-                          ((~! /.rec) (.function ((~ g!_) (~ g!self))
-                                        (~ bodyC)))))))
-             <type>.recursive_self
-             ... Type applications
-             (do !
-               [[funcC argsC] (<type>.applied (<>.and equivalence (<>.many equivalence)))]
-               (in (` ((~ funcC) (~+ argsC)))))
-             ... Parameters
-             <type>.parameter
-             ... Polymorphism
-             (do !
-               [[funcC varsC bodyC] (<type>.polymorphic equivalence)]
-               (in (` (is (All ((~ g!_) (~+ varsC))
-                            (-> (~+ (list#each (|>> (~) ((~! /.Equivalence)) (`)) varsC))
-                                ((~! /.Equivalence) ((~ (poly.code *env* inputT)) (~+ varsC)))))
-                          (function ((~ funcC) (~+ varsC))
-                            (~ bodyC))))))
-             <type>.recursive_call
-             ... If all else fails...
-             (|> <type>.any
-                 (at ! each (|>> %.type (format "Cannot create Equivalence for: ") <>.failure))
-                 (at ! conjoint))
-             ))))
diff --git a/stdlib/source/poly/lux/abstract/functor.lux b/stdlib/source/poly/lux/abstract/functor.lux
deleted file mode 100644
index 310c3ff9a..000000000
--- a/stdlib/source/poly/lux/abstract/functor.lux
+++ /dev/null
@@ -1,110 +0,0 @@
-(.using
- [library
-  [lux (.except)
-   [abstract
-    [monad (.only Monad do)]]
-   [control
-    ["p" parser (.only)
-     ["<[0]>" type]
-     ["s" code (.only Parser)]]]
-   [data
-    ["[0]" product]
-    ["[0]" text (.only)
-     ["%" format (.only format)]]
-    [collection
-     ["[0]" list (.open: "[1]#[0]" monad monoid)]]]
-   [macro
-    ["[0]" code]]
-   [math
-    [number
-     ["n" nat]]]
-   ["[0]" type (.only)
-    ["[0]" poly (.only poly:)]]]]
- [\\library
-  ["[0]" /]])
-
-(poly: .public functor
-  (do [! p.monad]
-    [.let [g!_ (code.local "____________")
-           type_funcC (code.local "____________type_funcC")
-           funcC (code.local "____________funcC")
-           inputC (code.local "____________inputC")]
-     *env* <type>.env
-     inputT <type>.next
-     [polyC varsC non_functorT] (<type>.local (list inputT)
-                                              (<type>.polymorphic <type>.any))
-     .let [num_vars (list.size varsC)]
-     .let [@Functor (is (-> Type Code)
-                        (function (_ unwrappedT)
-                          (if (n.= 1 num_vars)
-                            (` ((~! /.Functor) (~ (poly.code *env* unwrappedT))))
-                            (let [paramsC (|> num_vars -- list.indices (list#each (|>> %.nat code.local)))]
-                              (` (All ((~ g!_) (~+ paramsC))
-                                   ((~! /.Functor) ((~ (poly.code *env* unwrappedT)) (~+ paramsC)))))))))
-           Arg<?> (is (-> Code (<type>.Parser Code))
-                      (function (Arg<?> valueC)
-                        (all p.either
-                             ... Type-var
-                             (do p.monad
-                               [.let [varI (|> num_vars (n.* 2) --)]
-                                _ (<type>.this_parameter varI)]
-                               (in (` ((~ funcC) (~ valueC)))))
-                             ... Variants
-                             (do !
-                               [_ (in [])
-                                membersC (<type>.variant (p.many (Arg<?> valueC)))
-                                .let [last (-- (list.size membersC))]]
-                               (in (` (case (~ valueC)
-                                        (~+ (list#conjoint (list#each (function (_ [tag memberC])
-                                                                        (if (n.= last tag)
-                                                                          (list (` {(~ (code.nat (-- tag))) #1 (~ valueC)})
-                                                                                (` {(~ (code.nat (-- tag))) #1 (~ memberC)}))
-                                                                          (list (` {(~ (code.nat tag)) #0 (~ valueC)})
-                                                                                (` {(~ (code.nat tag)) #0 (~ memberC)}))))
-                                                                      (list.enumeration membersC))))))))
-                             ... Tuples
-                             (do p.monad
-                               [pairsCC (is (<type>.Parser (List [Code Code]))
-                                            (<type>.tuple (loop (again [idx 0
-                                                                        pairsCC (is (List [Code Code])
-                                                                                    (list))])
-                                                            (p.either (let [slotC (|> idx %.nat (format "____________slot") code.local)]
-                                                                        (do !
-                                                                          [_ (in [])
-                                                                           memberC (Arg<?> slotC)]
-                                                                          (again (++ idx)
-                                                                                 (list#composite pairsCC (list [slotC memberC])))))
-                                                                      (in pairsCC)))))]
-                               (in (` (case (~ valueC)
-                                        [(~+ (list#each product.left pairsCC))]
-                                        [(~+ (list#each product.right pairsCC))]))))
-                             ... Functions
-                             (do !
-                               [_ (in [])
-                                .let [g! (code.local "____________")
-                                      outL (code.local "____________outL")]
-                                [inT+ outC] (<type>.function (p.many <type>.any)
-                                              (Arg<?> outL))
-                                .let [inC+ (|> (list.size inT+)
-                                               list.indices
-                                               (list#each (|>> %.nat (format "____________inC") code.local)))]]
-                               (in (` (function ((~ g!) (~+ inC+))
-                                        (let [(~ outL) ((~ valueC) (~+ inC+))]
-                                          (~ outC))))))
-                             ... Recursion
-                             (do p.monad
-                               [_ <type>.recursive_call]
-                               (in (` ((~' each) (~ funcC) (~ valueC)))))
-                             ... Parameters
-                             (do p.monad
-                               [_ <type>.any]
-                               (in valueC))
-                             )))]
-     [_ _ outputC] (is (<type>.Parser [Code (List Code) Code])
-                       (p.either (<type>.polymorphic
-                                  (Arg<?> inputC))
-                                 (p.failure (format "Cannot create Functor for: " (%.type inputT)))))]
-    (in (` (is (~ (@Functor inputT))
-               (implementation
-                (def: ((~' each) (~ funcC) (~ inputC))
-                  (~ outputC))))))))
diff --git a/stdlib/source/poly/lux/data/format/json.lux b/stdlib/source/poly/lux/data/format/json.lux
deleted file mode 100644
index 391556a50..000000000
--- a/stdlib/source/poly/lux/data/format/json.lux
+++ /dev/null
@@ -1,335 +0,0 @@
-(.using
- [library
-  [lux (.except)
-   ["[0]" debug]
-   [abstract
-    [monad (.only do)]
-    ["[0]" codec]]
-   [control
-    ["[0]" try]
-    ["<>" parser (.only)
-     ["</>" json]
-     ["<[0]>" type]
-     ["<[0]>" code]]]
-   [data
-    ["[0]" text (.only)
-     ["%" format (.only format)]]
-    [collection
-     ["[0]" list (.open: "[1]#[0]" monad)]
-     ["[0]" sequence (.only sequence)]
-     ["[0]" dictionary]]]
-   [macro
-    [syntax (.only syntax)]
-    ["[0]" code]]
-   [math
-    [number
-     ["n" nat (.open: "[1]#[0]" decimal)]
-     ["[0]" i64]
-     ["[0]" int]
-     ["[0]" frac]]]
-   [time
-    ... ["[0]" instant]
-    ... ["[0]" duration]
-    ["[0]" date]
-    ["[0]" day]
-    ["[0]" month]]
-   ["[0]" type (.only)
-    ["[0]" unit]
-    ["[0]" poly (.only poly:)]]]]
- [\\library
-  ["[0]" / (.only JSON)]])
-
-(def: tag
-  (-> Nat Frac)
-  (|>> .int int.frac))
-
-(def: (rec_encoded non_rec)
-  (All (_ a) (-> (-> (-> a JSON)
-                     (-> a JSON))
-                 (-> a JSON)))
-  (function (_ input)
-    (non_rec (rec_encoded non_rec) input)))
-
-(def: low_mask Nat (|> 1 (i64.left_shifted 32) --))
-(def: high_mask Nat (|> low_mask (i64.left_shifted 32)))
-
-(implementation: nat_codec
-  (codec.Codec JSON Nat)
-  
-  (def: (encoded input)
-    (let [high (|> input (i64.and high_mask) (i64.right_shifted 32))
-          low (i64.and low_mask input)]
-      {/.#Array (sequence (|> high .int int.frac {/.#Number})
-                          (|> low .int int.frac {/.#Number}))}))
-  (def: decoded
-    (</>.result (</>.array
-                 (do <>.monad
-                   [high </>.number
-                    low </>.number]
-                   (in (n.+ (|> high frac.int .nat (i64.left_shifted 32))
-                            (|> low frac.int .nat))))))))
-
-(implementation: int_codec
-  (codec.Codec JSON Int)
-  
-  (def: encoded
-    (|>> .nat (at nat_codec encoded)))
-  (def: decoded
-    (|>> (at nat_codec decoded) (at try.functor each (|>> .int)))))
-
-... Builds a JSON generator for potentially inexistent values.
-(def: (nullable writer)
-  (All (_ a) (-> (-> a JSON) (-> (Maybe a) JSON)))
-  (function (_ elem)
-    (case elem
-      {.#None}       {/.#Null}
-      {.#Some value} (writer value))))
-
-(implementation: qty_codec
-  (All (_ unit)
-    (codec.Codec JSON (unit.Qty unit)))
-  
-  (def: encoded
-    (|>> ((debug.private unit.out'))
-         (at ..int_codec encoded)))
-  (def: decoded
-    (|>> (at ..int_codec decoded)
-         (at try.functor each (debug.private unit.in')))))
-
-(poly: encoded
-  (with_expansions
-    [<basic> (with_template [<matcher> <encoder>]
-               [(do !
-                  [.let [g!_ (code.local "_______")]
-                   _ <matcher>]
-                  (in (` (is (~ (@JSON#encoded inputT))
-                             <encoder>))))]
-
-               [(<type>.exactly Any) (function ((~ g!_) (~ (code.symbol ["" "0"]))) {/.#Null})]
-               [(<type>.sub Bit)     (|>> {/.#Boolean})]
-               [(<type>.sub Nat)     (at (~! ..nat_codec) (~' encoded))]
-               [(<type>.sub Int)     (at (~! ..int_codec) (~' encoded))]
-               [(<type>.sub Frac)    (|>> {/.#Number})]
-               [(<type>.sub Text)    (|>> {/.#String})])
-     <time> (with_template [<type> <codec>]
-              [(do !
-                 [_ (<type>.exactly <type>)]
-                 (in (` (is (~ (@JSON#encoded inputT))
-                            (|>> (at (~! <codec>) (~' encoded)) {/.#String})))))]
-
-              ... [duration.Duration duration.codec]
-              ... [instant.Instant instant.codec]
-              [date.Date date.codec]
-              [day.Day day.codec]
-              [month.Month month.codec])]
-    (do [! <>.monad]
-      [*env* <type>.env
-       .let [g!_ (code.local "_______")
-             @JSON#encoded (is (-> Type Code)
-                               (function (_ type)
-                                 (` (-> (~ (poly.code *env* type)) /.JSON))))]
-       inputT <type>.next]
-      (all <>.either
-           <basic>
-           <time>
-           (do !
-             [unitT (<type>.applied (<>.after (<type>.exactly unit.Qty)
-                                              <type>.any))]
-             (in (` (is (~ (@JSON#encoded inputT))
-                        (at (~! qty_codec) (~' encoded))))))
-           (do !
-             [.let [g!_ (code.local "_______")
-                    g!key (code.local "_______key")
-                    g!val (code.local "_______val")]
-              [_ _ =val=] (<type>.applied (all <>.and
-                                               (<type>.exactly dictionary.Dictionary)
-                                               (<type>.exactly .Text)
-                                               encoded))]
-             (in (` (is (~ (@JSON#encoded inputT))
-                        (|>> ((~! dictionary.entries))
-                             ((~! list#each) (function ((~ g!_) [(~ g!key) (~ g!val)])
-                                               [(~ g!key) ((~ =val=) (~ g!val))]))
-                             ((~! dictionary.of_list) (~! text.hash))
-                             {/.#Object})))))
-           (do !
-             [[_ =sub=] (<type>.applied (all <>.and
-                                             (<type>.exactly .Maybe)
-                                             encoded))]
-             (in (` (is (~ (@JSON#encoded inputT))
-                        ((~! ..nullable) (~ =sub=))))))
-           (do !
-             [[_ =sub=] (<type>.applied (all <>.and
-                                             (<type>.exactly .List)
-                                             encoded))]
-             (in (` (is (~ (@JSON#encoded inputT))
-                        (|>> ((~! list#each) (~ =sub=)) ((~! sequence.of_list)) {/.#Array})))))
-           (do !
-             [.let [g!_ (code.local "_______")
-                    g!input (code.local "_______input")]
-              members (<type>.variant (<>.many encoded))
-              .let [last (-- (list.size members))]]
-             (in (` (is (~ (@JSON#encoded inputT))
-                        (function ((~ g!_) (~ g!input))
-                          (case (~ g!input)
-                            (~+ (list#conjoint (list#each (function (_ [tag g!encoded])
-                                                            (if (n.= last tag)
-                                                              (.list (` {(~ (code.nat (-- tag))) #1 (~ g!input)})
-                                                                     (` ((~! /.json) [(~ (code.frac (..tag (-- tag))))
-                                                                                      #1
-                                                                                      ((~ g!encoded) (~ g!input))])))
-                                                              (.list (` {(~ (code.nat tag)) #0 (~ g!input)})
-                                                                     (` ((~! /.json) [(~ (code.frac (..tag tag)))
-                                                                                      #0
-                                                                                      ((~ g!encoded) (~ g!input))])))))
-                                                          (list.enumeration members))))))))))
-           (do !
-             [g!encoders (<type>.tuple (<>.many encoded))
-              .let [g!_ (code.local "_______")
-                    g!members (|> (list.size g!encoders)
-                                  list.indices
-                                  (list#each (|>> n#encoded code.local)))]]
-             (in (` (is (~ (@JSON#encoded inputT))
-                        (function ((~ g!_) [(~+ g!members)])
-                          ((~! /.json) [(~+ (list#each (function (_ [g!member g!encoded])
-                                                         (` ((~ g!encoded) (~ g!member))))
-                                                       (list.zipped_2 g!members g!encoders)))]))))))
-           ... Type recursion
-           (do !
-             [[selfC non_recC] (<type>.recursive encoded)
-              .let [g! (code.local "____________")]]
-             (in (` (is (~ (@JSON#encoded inputT))
-                        ((~! ..rec_encoded) (.function ((~ g!) (~ selfC))
-                                              (~ non_recC)))))))
-           <type>.recursive_self
-           ... Type applications
-           (do !
-             [partsC (<type>.applied (<>.many encoded))]
-             (in (` ((~+ partsC)))))
-           ... Polymorphism
-           (do !
-             [[funcC varsC bodyC] (<type>.polymorphic encoded)]
-             (in (` (is (All ((~ g!_) (~+ varsC))
-                          (-> (~+ (list#each (function (_ varC) (` (-> (~ varC) /.JSON)))
-                                             varsC))
-                              (-> ((~ (poly.code *env* inputT)) (~+ varsC))
-                                  /.JSON)))
-                        (function ((~ funcC) (~+ varsC))
-                          (~ bodyC))))))
-           <type>.parameter
-           <type>.recursive_call
-           ... If all else fails...
-           (<>.failure (format "Cannot create JSON encoder for: " (type.format inputT)))
-           ))))
-
-(poly: decoded
-  (with_expansions
-    [<basic> (with_template [<matcher> <decoder>]
-               [(do !
-                  [_ <matcher>]
-                  (in (` (is (~ (@JSON#decoded inputT))
-                             (~! <decoder>)))))]
-
-               [(<type>.exactly Any)  </>.null]
-               [(<type>.sub Bit)      </>.boolean]
-               [(<type>.sub Nat)      (<>.codec ..nat_codec </>.any)]
-               [(<type>.sub Int)      (<>.codec ..int_codec </>.any)]
-               [(<type>.sub Frac)     </>.number]
-               [(<type>.sub Text)     </>.string])
-     <time> (with_template [<type> <codec>]
-              [(do !
-                 [_ (<type>.exactly <type>)]
-                 (in (` (is (~ (@JSON#decoded inputT))
-                            ((~! <>.codec) (~! <codec>) (~! </>.string))))))]
-
-              ... [duration.Duration duration.codec]
-              ... [instant.Instant instant.codec]
-              [date.Date date.codec]
-              [day.Day day.codec]
-              [month.Month month.codec])]
-    (do [! <>.monad]
-      [*env* <type>.env
-       .let [g!_ (code.local "_______")
-             @JSON#decoded (is (-> Type Code)
-                               (function (_ type)
-                                 (` (</>.Parser (~ (poly.code *env* type))))))]
-       inputT <type>.next]
-      (all <>.either
-           <basic>
-           <time>
-           (do !
-             [unitT (<type>.applied (<>.after (<type>.exactly unit.Qty)
-                                              <type>.any))]
-             (in (` (is (~ (@JSON#decoded inputT))
-                        ((~! <>.codec) (~! qty_codec) (~! </>.any))))))
-           (do !
-             [[_ _ valC] (<type>.applied (all <>.and
-                                              (<type>.exactly dictionary.Dictionary)
-                                              (<type>.exactly .Text)
-                                              decoded))]
-             (in (` (is (~ (@JSON#decoded inputT))
-                        ((~! </>.dictionary) (~ valC))))))
-           (do !
-             [[_ subC] (<type>.applied (<>.and (<type>.exactly .Maybe)
-                                               decoded))]
-             (in (` (is (~ (@JSON#decoded inputT))
-                        ((~! </>.nullable) (~ subC))))))
-           (do !
-             [[_ subC] (<type>.applied (<>.and (<type>.exactly .List)
-                                               decoded))]
-             (in (` (is (~ (@JSON#decoded inputT))
-                        ((~! </>.array) ((~! <>.some) (~ subC)))))))
-           (do !
-             [members (<type>.variant (<>.many decoded))
-              .let [last (-- (list.size members))]]
-             (in (` (is (~ (@JSON#decoded inputT))
-                        (all ((~! <>.or))
-                             (~+ (list#each (function (_ [tag memberC])
-                                              (if (n.= last tag)
-                                                (` (|> (~ memberC)
-                                                       ((~! <>.after) ((~! </>.this_boolean) (~ (code.bit #1))))
-                                                       ((~! <>.after) ((~! </>.this_number) (~ (code.frac (..tag (-- tag))))))
-                                                       ((~! </>.array))))
-                                                (` (|> (~ memberC)
-                                                       ((~! <>.after) ((~! </>.this_boolean) (~ (code.bit #0))))
-                                                       ((~! <>.after) ((~! </>.this_number) (~ (code.frac (..tag tag)))))
-                                                       ((~! </>.array))))))
-                                            (list.enumeration members))))))))
-           (do !
-             [g!decoders (<type>.tuple (<>.many decoded))]
-             (in (` (is (~ (@JSON#decoded inputT))
-                        ((~! </>.array) (all ((~! <>.and)) (~+ g!decoders)))))))
-           ... Type recursion
-           (do !
-             [[selfC bodyC] (<type>.recursive decoded)
-              .let [g! (code.local "____________")]]
-             (in (` (is (~ (@JSON#decoded inputT))
-                        ((~! <>.rec) (.function ((~ g!) (~ selfC))
-                                       (~ bodyC)))))))
-           <type>.recursive_self
-           ... Type applications
-           (do !
-             [[funcC argsC] (<type>.applied (<>.and decoded (<>.many decoded)))]
-             (in (` ((~ funcC) (~+ argsC)))))
-           ... Polymorphism
-           (do !
-             [[funcC varsC bodyC] (<type>.polymorphic decoded)]
-             (in (` (is (All ((~ g!_) (~+ varsC))
-                          (-> (~+ (list#each (|>> (~) </>.Parser (`)) varsC))
-                              (</>.Parser ((~ (poly.code *env* inputT)) (~+ varsC)))))
-                        (function ((~ funcC) (~+ varsC))
-                          (~ bodyC))))))
-           <type>.parameter
-           <type>.recursive_call
-           ... If all else fails...
-           (<>.failure (format "Cannot create JSON decoder for: " (type.format inputT)))
-           ))))
-
-(def: .public codec
-  (syntax (_ [inputT <code>.any])
-    (in (.list (` (is (codec.Codec /.JSON (~ inputT))
-                      (implementation
-                       (def: (~' encoded)
-                         ((~! ..encoded) (~ inputT)))
-                       (def: (~' decoded)
-                         ((~! </>.result) ((~! ..decoded) (~ inputT))))
-                       )))))))
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