- declare-macro has returned.

- Method-invocation special forms now take the wanted method as an unprefixed symbol, instead of as text.
- Some fixes in lux.analyser.host.
- Lambda analysis now just returns the origin exo-type instead of the endo-type.
- Made some changes to the type of the CompilerState.

1 files changed, 464 insertions, 694 deletions

diff --git a/source/lux.lux b/source/lux.lux
index 32fde1d8a..8e004913b 100644
--- a/source/lux.lux
+++ b/source/lux.lux
@@ -118,41 +118,6 @@
                                      #Nil]))])]))
 (export' Meta)
 
-## (def' Reader
-##   (List (Meta Cursor Text)))
-(def' Reader
-  (#AppT [List
-          (#AppT [(#AppT [Meta Cursor])
-                  Text])]))
-(export' Reader)
-
-## (deftype HostState
-##   (& #writer    (^ org.objectweb.asm.ClassWriter)
-##      #loader    (^ java.net.URLClassLoader)
-##      #eval-ctor Int))
-(def' HostState
-  (#RecordT (#Cons [["lux;writer" (#DataT "org.objectweb.asm.ClassWriter")]
-                    (#Cons [["lux;loader" (#DataT "java.lang.ClassLoader")]
-                            (#Cons [["lux;eval-ctor" Int]
-                                    #Nil])])])))
-
-## (deftype CompilerState
-##   (& #source         (Maybe Reader)
-##      #modules        (List Void)
-##      #module-aliases (List Void)
-##      #envs           (List (Env Text Void))
-##      #types          (Bindings Int Type)
-##      #host           HostState))
-(def' CompilerState
-  (#RecordT (#Cons [["lux;source" (#AppT [Maybe Reader])]
-                    (#Cons [["lux;modules" (#AppT [List Void])]
-                            (#Cons [["lux;module-aliases" (#AppT [List Void])]
-                                    (#Cons [["lux;envs" (#AppT [List (#AppT [(#AppT [Env Text]) Void])])]
-                                            (#Cons [["lux;types" (#AppT [(#AppT [Bindings Int]) Type])]
-                                                    (#Cons [["lux;host" HostState]
-                                                            #Nil])])])])])])))
-(export' CompilerState)
-
 ## (deftype (Syntax' w)
 ##   (| (#Bool Bool)
 ##      (#Int Int)
@@ -211,16 +176,78 @@
                                              #Nil])]))])]))
 (export' Either)
 
+## (deftype (StateE s a)
+##   (-> s (Either Text (, s a))))
+(def' StateE
+  (#AllT [#None "StateE" "s"
+          (#AllT [#None "" "a"
+                  (#LambdaT [(#BoundT "s")
+                             (#AppT [(#AppT [Either Text])
+                                     (#TupleT (#Cons [(#BoundT "s")
+                                                      (#Cons [(#BoundT "a")
+                                                              #Nil])]))])])])]))
+
+## (def' Reader
+##   (List (Meta Cursor Text)))
+(def' Reader
+  (#AppT [List
+          (#AppT [(#AppT [Meta Cursor])
+                  Text])]))
+(export' Reader)
+
+## (deftype HostState
+##   (& #writer    (^ org.objectweb.asm.ClassWriter)
+##      #loader    (^ java.net.URLClassLoader)
+##      #eval-ctor Int))
+(def' HostState
+  (#RecordT (#Cons [["lux;writer" (#DataT "org.objectweb.asm.ClassWriter")]
+                    (#Cons [["lux;loader" (#DataT "java.lang.ClassLoader")]
+                            (#Cons [["lux;eval-ctor" Int]
+                                    #Nil])])])))
+
+## (deftype (DefData' m)
+##   (| #TypeD
+##      (#ValueD Type)
+##      (#MacroD m)))
+(def' DefData'
+  (#AllT [#None "DefData'" ""
+          (#VariantT (#Cons [["lux;TypeD" (#TupleT #Nil)]
+                             (#Cons [["lux;ValueD" Type]
+                                     (#Cons [["lux;MacroD" (#BoundT "")]
+                                             #Nil])])]))]))
+
+## (deftype #rec CompilerState
+##   (& #source         (Maybe Reader)
+##      #modules        (List (, Text (List (, Text (DefData' (-> (List Syntax) (StateE CompilerState (List Syntax))))))))
+##      #module-aliases (List Void)
+##      #envs           (List (Env Text Void))
+##      #types          (Bindings Int Type)
+##      #host           HostState))
+(def' CompilerState
+  (#AppT [(#AllT [#None "CompilerState" ""
+                  (#RecordT (#Cons [["lux;source" (#AppT [Maybe Reader])]
+                                    (#Cons [["lux;modules" (#AppT [List (#TupleT (#Cons [Text
+                                                                                         (#Cons [(#AppT [List (#TupleT (#Cons [Text
+                                                                                                                               (#Cons [(#AppT [DefData' (#LambdaT [SyntaxList
+                                                                                                                                                                   (#AppT [(#AppT [StateE (#AppT [(#BoundT "CompilerState")
+                                                                                                                                                                                                  (#BoundT "")])])
+                                                                                                                                                                           SyntaxList])])])
+                                                                                                                                       #Nil])]))])
+                                                                                                 #Nil])]))])]
+                                            (#Cons [["lux;module-aliases" (#AppT [List Void])]
+                                                    (#Cons [["lux;envs" (#AppT [List (#AppT [(#AppT [Env Text]) Void])])]
+                                                            (#Cons [["lux;types" (#AppT [(#AppT [Bindings Int]) Type])]
+                                                                    (#Cons [["lux;host" HostState]
+                                                                            #Nil])])])])])]))])
+          Void]))
+(export' CompilerState)
+
 ## (deftype Macro
-##   (-> (List Syntax) CompilerState
-##       (Either Text (, CompilerState (List Syntax)))))
+##   (-> (List Syntax) (StateE CompilerState (List Syntax))))
 (def' Macro
   (#LambdaT [SyntaxList
-             (#LambdaT [CompilerState
-                        (#AppT [(#AppT [Either Text])
-                                (#TupleT (#Cons [CompilerState
-                                                 (#Cons [SyntaxList
-                                                         #Nil])]))])])]))
+             (#AppT [(#AppT [StateE CompilerState])
+                     SyntaxList])]))
 (export' Macro)
 
 ## Base functions & macros
@@ -275,33 +302,39 @@
 (def' $text
   (:' (#LambdaT [Text Syntax])
       (lambda' _ text
-          (_meta (#Text text)))))
+               (_meta (#Text text)))))
 (export' $text)
 
 (def' $symbol
   (:' (#LambdaT [Ident Syntax])
       (lambda' _ ident
-          (_meta (#Symbol ident)))))
+               (_meta (#Symbol ident)))))
 (export' $symbol)
 
 (def' $tag
   (:' (#LambdaT [Ident Syntax])
       (lambda' _ ident
-          (_meta (#Tag ident)))))
+               (_meta (#Tag ident)))))
 (export' $tag)
 
 (def' $form
   (:' (#LambdaT [(#AppT [List Syntax]) Syntax])
       (lambda' _ tokens
-          (_meta (#Form tokens)))))
+               (_meta (#Form tokens)))))
 (export' $form)
 
 (def' $tuple
   (:' (#LambdaT [(#AppT [List Syntax]) Syntax])
       (lambda' _ tokens
-          (_meta (#Tuple tokens)))))
+               (_meta (#Tuple tokens)))))
 (export' $tuple)
 
+(def' $record
+  (:' (#LambdaT [(#AppT [List (#TupleT (#Cons [Syntax (#Cons [Syntax #Nil])]))]) Syntax])
+      (lambda' _ tokens
+               (_meta (#Record tokens)))))
+(export' $record)
+
 (def' let'
   (:' Macro
       (lambda' _ tokens
@@ -314,6 +347,7 @@
 
                       _
                       (fail "Wrong syntax for let'")))))
+(declare-macro' let')
 
 (def' lambda_
   (:' Macro
@@ -353,6 +387,7 @@
                       
                       _
                       (fail "Wrong syntax for lambda")))))
+(declare-macro' lambda_)
 
 (def' def_
   (:' Macro
@@ -416,33 +451,37 @@
                _
                (fail "Wrong syntax for def")
                ))))
+(declare-macro' def_)
 
 (def_ #export (defmacro tokens)
   Macro
   (case' tokens
-         (#Cons [usage (#Cons [body #Nil])])
+         (#Cons [(#Meta [_ (#Form (#Cons [name args]))]) (#Cons [body #Nil])])
          (return (:' SyntaxList
-                     (#Cons [(_meta (#Form (#Cons [($symbol ["lux" "def_"])
-                                                   (#Cons [usage
-                                                           (#Cons [($symbol ["lux" "Macro"])
-                                                                   (#Cons [body
-                                                                           #Nil])])
-                                                           ])])))
-                             #Nil])))
-
-         (#Cons [(#Meta [_ (#Tag ["" "export"])]) (#Cons [usage (#Cons [body #Nil])])])
+                     (#Cons [($form (#Cons [($symbol ["lux" "def_"])
+                                            (#Cons [($form (#Cons [name args]))
+                                                    (#Cons [($symbol ["lux" "Macro"])
+                                                            (#Cons [body
+                                                                    #Nil])])
+                                                    ])]))
+                             (#Cons [($form (#Cons [($symbol ["" "declare-macro'"]) (#Cons [name #Nil])]))
+                                     #Nil])])))
+
+         (#Cons [(#Meta [_ (#Tag ["" "export"])]) (#Cons [(#Meta [_ (#Form (#Cons [name args]))]) (#Cons [body #Nil])])])
          (return (:' SyntaxList
-                     (#Cons [(_meta (#Form (#Cons [($symbol ["lux" "def_"])
-                                                   (#Cons [($tag ["" "export"])
-                                                           (#Cons [usage
-                                                                   (#Cons [($symbol ["lux" "Macro"])
-                                                                           (#Cons [body
-                                                                                   #Nil])])
-                                                                   ])])])))
-                             #Nil])))
+                     (#Cons [($form (#Cons [($symbol ["lux" "def_"])
+                                            (#Cons [($tag ["" "export"])
+                                                    (#Cons [($form (#Cons [name args]))
+                                                            (#Cons [($symbol ["lux" "Macro"])
+                                                                    (#Cons [body
+                                                                            #Nil])])
+                                                            ])])]))
+                             (#Cons [($form (#Cons [($symbol ["" "declare-macro'"]) (#Cons [name #Nil])]))
+                                     #Nil])])))
 
          _
          (fail "Wrong syntax for defmacro")))
+(declare-macro' defmacro)
 
 (defmacro #export (comment tokens)
   (return (:' SyntaxList #Nil)))
@@ -730,6 +769,15 @@
          (_meta (#Form (list (_meta (#Tag ["lux" "Cons"]))
                              (_meta (#Tuple (list token (untemplate-list tokens')))))))))
 
+(def (list:++ xs ys)
+  (All' [a] (->' ($' List (B' a)) ($' List (B' a)) ($' List (B' a))))
+  (case' xs
+         (#Cons [x xs'])
+         (#Cons [x (list:++ xs' ys)])
+
+         #Nil
+         ys))
+
 (defmacro #export ($ tokens)
   (case' tokens
          (#Cons [op (#Cons [init args])])
@@ -743,15 +791,6 @@
          _
          (fail "Wrong syntax for $")))
 
-(def (list:++ xs ys)
-  (All' [a] (->' ($' List (B' a)) ($' List (B' a)) ($' List (B' a))))
-  (case' xs
-         (#Cons [x xs'])
-         (#Cons [x (list:++ xs' ys)])
-
-         #Nil
-         ys))
-
 (def (splice untemplate tag elems)
   (->' (->' Syntax Syntax) Syntax ($' List Syntax) Syntax)
   (case' (any? spliced? elems)
@@ -826,6 +865,24 @@
          _
          (fail "Wrong syntax for `")))
 
+(defmacro #export (|> tokens)
+  (case' tokens
+         (#Cons [init apps])
+         (return (:' SyntaxList
+                     (list (fold (:' (->' Syntax Syntax Syntax)
+                                     (lambda [acc app]
+                                       (case' app
+                                              (#Meta [_ (#Form parts)])
+                                              ($form (list:++ parts (list acc)))
+
+                                              _
+                                              (` ((~ app) (~ acc))))))
+                                 init
+                                 apps))))
+
+         _
+         (fail "Wrong syntax for |>")))
+
 (defmacro #export (if tokens)
   (case' tokens
          (#Cons [test (#Cons [then (#Cons [else #Nil])])])
@@ -952,6 +1009,163 @@
              (;return (:' List (#Cons [y ys]))))
            )))
 
+(def #export (. f g)
+  (All' [a b c]
+        (-> (-> (B' b) (B' c)) (-> (B' a) (B' b)) (-> (B' a) (B' c))))
+  (lambda [x]
+    (f (g x))))
+
+(def (get-ident x)
+  (-> Syntax ($' Maybe Text))
+  (case' x
+         (#Meta [_ (#Symbol ["" sname])])
+         (#Some sname)
+
+         _
+         #None))
+
+(def (tuple->list tuple)
+  (-> Syntax ($' Maybe ($' List Syntax)))
+  (case' tuple
+         (#Meta [_ (#Tuple members)])
+         (#Some members)
+
+         _
+         #None))
+
+(def RepEnv
+  Type
+  ($' List (, Text Syntax)))
+
+(def (make-env xs ys)
+  (-> ($' List Text) ($' List Syntax) RepEnv)
+  (case' (:' (, ($' List Text) ($' List Syntax))
+             [xs ys])
+         [(#Cons [x xs']) (#Cons [y ys'])]
+         (#Cons [[x y] (make-env xs' ys')])
+
+         _
+         #Nil))
+
+(def (text:= x y)
+  (-> Text Text Bool)
+  (jvm-invokevirtual java.lang.Object equals [java.lang.Object]
+                     x [y]))
+
+(def (get-rep key env)
+  (-> Text RepEnv ($' Maybe Syntax))
+  (case' env
+         #Nil
+         #None
+
+         (#Cons [[k v] env'])
+         (if (text:= k key)
+           (#Some v)
+           (get-rep key env'))))
+
+(def (apply-template env template)
+  (-> RepEnv Syntax Syntax)
+  (case' template
+         (#Meta [_ (#Symbol ["" sname])])
+         (case' (get-rep sname env)
+                (#Some subst)
+                subst
+
+                _
+                template)
+
+         (#Meta [_ (#Tuple elems)])
+         ($tuple (map (apply-template env) elems))
+
+         (#Meta [_ (#Form elems)])
+         ($form (map (apply-template env) elems))
+
+         (#Meta [_ (#Record members)])
+         ($record (map (:' (-> (, Syntax Syntax) (, Syntax Syntax))
+                           (lambda [kv]
+                             (let [[slot value] kv]
+                               [(apply-template env slot) (apply-template env value)])))
+                       members))
+
+         _
+         template))
+
+(def (join-map f xs)
+  (All' [a b]
+        (-> (-> (B' a) ($' List (B' b))) ($' List (B' a)) ($' List (B' b))))
+  (case' xs
+         #Nil
+         #Nil
+
+         (#Cons [x xs'])
+         (list:++ (f x) (join-map f xs'))))
+
+(defmacro (do-template tokens)
+  (case' tokens
+         (#Cons [(#Meta [_ (#Tuple bindings)]) (#Cons [(#Meta [_ (#Tuple templates)]) data])])
+         (case' (:' (, ($' Maybe ($' List Text)) ($' Maybe ($' List ($' List Syntax))))
+                    [(map% Maybe:Monad get-ident bindings)
+                     (map% Maybe:Monad tuple->list data)])
+                [(#Some bindings') (#Some data')]
+                (let [apply (:' (-> RepEnv ($' List Syntax))
+                                (lambda [env] (map (apply-template env) templates)))]
+                  (|> data'
+                      (join-map (. apply (make-env bindings')))
+                      return))
+
+                _
+                (fail "All the do-template bindigns must be symbols."))
+
+         _
+         (fail "Wrong syntax for do-template")))
+
+(do-template [<name> <cmp> <type>]
+  [(def #export (<name> x y)
+     (-> <type> <type> Bool)
+     (<cmp> x y))]
+
+  [int:=  jvm-leq Int]
+  [int:>  jvm-lgt Int]
+  [int:<  jvm-llt Int]
+  [real:= jvm-deq Real]
+  [real:> jvm-dgt Real]
+  [real:< jvm-dlt Real]
+  )
+
+(do-template [<name> <cmp> <type>]
+  [(def #export (<name> x y)
+     (-> <type> <type> <type>)
+     (<cmp> x y))]
+
+  [int:+  jvm-ladd Int]
+  [int:-  jvm-lsub Int]
+  [int:*  jvm-lmul Int]
+  [int:/  jvm-ldiv Int]
+  [int:%  jvm-lrem Int]
+  [real:+ jvm-dadd Real]
+  [real:- jvm-dsub Real]
+  [real:* jvm-dmul Real]
+  [real:/ jvm-ddiv Real]
+  [real:% jvm-drem Real]
+  )
+
+(def (multiple? div n)
+  (-> Int Int Bool)
+  (int:= 0 (int:% n div)))
+
+(def #export (length list)
+  (-> List Int)
+  (fold (lambda [acc _] (int:+ 1 acc)) 0 list))
+
+(def #export (not x)
+  (-> Bool Bool)
+  (if x false true))
+
+(def (text:++ x y)
+  (-> Text Text Text)
+  (jvm-invokevirtual java.lang.String concat [java.lang.String]
+                     x [y]))
+
 (def (ident->text ident)
   (-> Ident Text)
   (let [[module name] ident]
@@ -975,61 +1189,98 @@
     (;return (:' SyntaxList (list (` (#VariantT (list (~@ pairs)))))))))
 
 (defmacro #export (& tokens)
-  (if (not (int:= 2 (length tokens)))
+  (if (not (multiple? 2 (length tokens)))
     (fail "& expects an even number of arguments.")
     (do Lux:Monad
       [pairs (map% Lux:Monad
-                   (lambda [pair]
-                     (case' pair
-                            [(#Meta [_ (#Tag ident)]) value]
-                            (;return (:' Syntax (` [(~ ($text (ident->text ident))) (~ value)])))
-                            
-                            _
-                            (fail "Wrong syntax for &")))
+                   (:' (-> (, Syntax Syntax) ($' Lux Syntax))
+                       (lambda [pair]
+                         (case' pair
+                                [(#Meta [_ (#Tag ident)]) value]
+                                (;return (:' Syntax (` [(~ ($text (ident->text ident))) (~ value)])))
+                                
+                                _
+                                (fail "Wrong syntax for &"))))
                    (as-pairs tokens))]
       (;return (:' SyntaxList (list (` (#RecordT (list (~@ pairs))))))))))
 
-## (defmacro #export (All tokens)
-##   (case' (:' (, Ident SyntaxList)
-##              (case' tokens
-##                     (#Cons [(#Meta [_ (#Symbol self-ident)]) tokens'])
-##                     [self-ident tokens']
-
-##                     _
-##                     [["" ""] tokens]))
-##          [self-ident tokens']
-##          (case' tokens'
-##                 (#Cons [(#Meta [_ (#Tuple args)]) (#Cons [body #Nil])])
-##                 (do Lux:Monad
-##                   [idents (map% Lux:Monad get-ident args)]
-##                   (case' idents
-##                          #Nil
-##                          (return (list body))
+(def (replace-syntax reps syntax)
+  (-> RepEnv Syntax Syntax)
+  (case' syntax
+         (#Meta [_ (#Symbol ["" name])])
+         (case' (get-rep name reps)
+                (#Some replacement)
+                replacement
+
+                #None
+                syntax)
+
+         (#Meta [_ (#Form parts)])
+         (#Meta [_ (#Form (map (replace-syntax reps) parts))])
+
+         (#Meta [_ (#Tuple members)])
+         (#Meta [_ (#Tuple (map (replace-syntax reps) members))])
+
+         (#Meta [_ (#Record slots)])
+         (#Meta [_ (#Record (map (:' (-> (, Syntax Syntax) (, Syntax Syntax))
+                                     (lambda [slot]
+                                       (let [[k v] slot]
+                                         [(replace-syntax reps k) (replace-syntax reps v)])))
+                                 slots))])
+         
+         _
+         syntax)
+  )
+
+(defmacro #export (All tokens)
+  (let [[self-ident tokens'] (:' (, Text SyntaxList)
+                                 (case' tokens
+                                        (#Cons [(#Meta [_ (#Symbol ["" self-ident])]) tokens'])
+                                        [self-ident tokens']
+
+                                        _
+                                        ["" tokens]))]
+    (case' tokens'
+           (#Cons [(#Meta [_ (#Tuple args)]) (#Cons [body #Nil])])
+           (case' (map% Maybe:Monad get-ident args)
+                  (#Some idents)
+                  (case' idents
+                         #Nil
+                         (return (:' SyntaxList (list body)))
                          
-##                          (#Cons [harg targs])
-##                          (let [replacements (map (:' (-> Ident (, Ident Syntax))
-##                                                      (lambda [ident]
-##                                                        (let [[module name] ident]
-##                                                          [ident (_meta (#Bound ($ text:++ module ";" name)))])))
-##                                                  (list& self-ident idents))
-##                                body' (fold (lambda [body' arg']
-##                                              (let [[module name] arg']
-##                                                (` (#AllT [#None "" (~ ($text ($ text:++ module ";" name)))
-##                                                           (~ body')]))))
-##                                            (replace-syntax replacements body)
-##                                            (reverse targs))
-##                                [smodule sname] self-ident
-##                                [amodule aname] harg]
-##                            (return (list (` (#AllT [#None (~ ($text ($ text:++ smodule ";" sname)))
-##                                                     (~ ($text ($ text:++ amodule ";" aname)))
-##                                                     (~ body')])))))))
-                
-##                 _
-##                 (fail "Wrong syntax for All"))
-##          ))
+                         (#Cons [harg targs])
+                         (let [replacements (map (:' (-> Text (, Text Syntax))
+                                                     (lambda [ident] [ident (` (#BoundT (~ ($text ident))))]))
+                                                 (list& self-ident idents))
+                               body' (fold (:' (-> Syntax Text Syntax)
+                                               (lambda [body' arg']
+                                                 (` (#AllT [#None "" (~ ($text arg')) (~ body')]))))
+                                           (replace-syntax replacements body)
+                                           (reverse targs))]
+                           (return (:' SyntaxList
+                                       (list (` (#AllT [#None (~ ($text self-ident)) (~ ($text harg)) (~ body')])))))))
+                  
+                  #None
+                  (fail "'All' arguments must be symbols."))
+           
+           _
+           (fail "Wrong syntax for All"))
+    ))
+
+(def (get k plist)
+  (All [a]
+    (-> Text ($' List (, Text a)) ($' Maybe a)))
+  (case' plist
+         (#Cons [[k' v] plist'])
+         (if (text:= k k')
+           (#Some v)
+           (get k plist'))
+
+         #Nil
+         #None))
 
 ## (def #export (find-macro ident state)
-##   (->' Ident ($' Lux Macro))
+##   (-> Ident ($' Lux Macro))
 ##   (let [[module name] ident]
 ##     (case' state
 ##            {#source source #modules modules #module-aliases module-aliases
@@ -1040,99 +1291,75 @@
 ##                          gdef (get name bindings)]
 ##                         (case' gdef
 ##                                (#MacroD macro')
-##                                macro'
-                               
+##                                (#Some macro')
+
 ##                                _
 ##                                #None)))
 ##                   (#Some macro)
 ##                   (#Right [state macro])
-                  
+
 ##                   #None
 ##                   (#Left ($ text:++ "There is no macro by the name: " module ";" name))))))
 
-## ## (def (id x)
-## ##   (All [a] (-> a a))
-## ##   x)
-## ## (export' id)
-
-## ## (def (text:= x y)
-## ##   (-> Text Text Bool)
-## ##   (jvm-invokevirtual java.lang.Object "equals" [java.lang.Object]
-## ##                      x [y]))
-
-## ## (def (replace-ident ident value syntax)
-## ##   (-> (, Text Text) Syntax Syntax Syntax)
-## ##   (let [[module name] ident]
-## ##     (case' syntax
-## ##            (#Meta [_ (#Symbol [?module ?name])])
-## ##            (if (and (text:= module ?module)
-## ##                     (text:= name ?name))
-## ##              value
-## ##              syntax)
-
-## ##            (#Meta [_ (#Form members)])
-## ##            (_meta (#Form (map (replace-ident ident value) members)))
-
-## ##            (#Meta [_ (#Tuple members)])
-## ##            (_meta (#Tuple (map (replace-ident ident value) members)))
-
-## ##            (#Meta [_ (#Record members)])
-## ##            (_meta (#Record (map (lambda [kv]
-## ##                                   (case' kv
-## ##                                          [k v]
-## ##                                          [k (replace-ident ident value v)]))
-## ##                                 members)))
-
-## ##            _
-## ##            syntax)))
-
-## ## (defsig (Eq a)
-## ##   (: (-> a a Bool)
-## ##      =))
-
-## ## (defstruct Text:Eq (Eq Text)
-## ##   (def = text=))
-
-## ## (defstruct Ident:Eq (Eq Ident)
-## ##   (def (= x y)
-## ##     (let [[m1 n1] x
-## ##           [m2 n2] y]
-## ##       (and (text:= m1 m2)
-## ##            (text:= n1 n2)))))
-
-## ## (deftype (Dict k v)
-## ##   (: (-> k v (Dict k v) (Dict k v))
-## ##      put)
-## ##   (: (-> k (Dict k v) (Maybe v))
-## ##      get)
-## ##   (: (-> k (Dict k v) (Dict k v))
-## ##      remove))
-
-## ## (deftype (PList k v)
-## ##   (| (#PList (, (Eq k) (List (, k v))))))
-
-## ## (def (some f xs)
-## ##   (All [a b]
-## ##     (-> (-> a (Maybe b)) (List a) (Maybe b)))
-## ##   (case' xs
-## ##          #Nil
-## ##          #None
-
-## ##          (#Cons [x xs'])
-## ##          (if-let [y (f x)]
-## ##                  (#Some y)
-## ##                  (some f xs'))
-## ##          ))
-
-## ## (defstruct PList:Dict (Dict PList)
-## ##   (def (get k plist)
-## ##     (let [(#PList [{#= =} kvs]) plist]
-## ##       (some (:' (-> (, ))
-## ##                 (lambda [kv]
-## ##                   (let [[k' v'] kv]
-## ##                     (when (= k k')
-## ##                           v'))))
-## ##             kvs))))
+(def #export (find-macro ident state)
+  (-> Ident ($' Lux Macro))
+  (let [[module name] ident]
+    (case' state
+           {#source source #modules modules #module-aliases module-aliases
+            #envs   envs   #types   types   #host           host}
+           (case' (:' ($' Maybe Macro)
+                      (case' (get module modules)
+                             (#Some bindings)
+                             (case' (get name bindings)
+                                    (#Some gdef)
+                                    (case' gdef
+                                           (#MacroD macro')
+                                           (#Some macro')
+
+                                           _
+                                           #None)
+
+                                    #None
+                                    #None)
+
+                             #None
+                             #None))
+                  (#Some macro)
+                  (#Right [state macro])
+
+                  #None
+                  (#Left ($ text:++ "There is no macro by the name: " module ";" name))))))
+
+(def (join-list xs)
+  (All [a]
+    (-> ($' List ($' List a)) ($' List a)))
+  (fold list:++ #Nil xs))
+
+(def #export (macro-expand syntax state)
+  (-> Syntax ($' Lux ($' List Syntax)))
+  (case' syntax
+         (#Meta [_ (#Form (#Cons [(#Meta [_ (#Symbol macro-name)]) args]))])
+         (do Lux:Monad
+           [macro' (find-macro macro-name)]
+           (case' macro'
+                  (#Some macro)
+                  (do Lux:Monad
+                    [expansion (macro args)
+                     expansion' (map% Lux:Monad macro-expand expansion)]
+                    (return (:' SyntaxList (join-list expansion'))))
+                  
+                  #None
+                  (do Lux:Monad
+                    [parts' (map% Lux:Monad macro-expand (list& ($symbol macro-name) args))]
+                    (return (:' Syntax (list ($form (join-list parts'))))))))
+
+         (#Meta [_ (#Tuple members)])
+         (do Lux:Monad
+           [members' (map% Lux:Monad macro-expand members)]
+           (return (:' Syntax (list ($tuple (join-list members'))))))
+
+         _
+         (return (:' SyntaxList (list syntax)))))
 
 ## ## (def (walk-type type)
 ## ##   (-> Syntax ($' Lux Syntax))
@@ -1191,16 +1418,6 @@
 ## ##          _
 ## ##          (fail "Wrong syntax for :!")))
 
-## ## (def (print x)
-## ##   (-> (^ java.lang.Object) [])
-## ##   (jvm-invokevirtual java.io.PrintStream "print" [java.lang.Object]
-## ##                      (jvm-getstatic java.lang.System "out") [x]))
-
-## ## (def (println x)
-## ##   (-> (^ java.lang.Object) [])
-## ##   (jvm-invokevirtual java.io.PrintStream "println" [java.lang.Object]
-## ##                      (jvm-getstatic java.lang.System "out") [x]))
-
 ## ## (deftype (IO a)
 ## ##   (-> (,) a))
 
@@ -1209,341 +1426,43 @@
 ## ##          (#Cons [value #Nil])
 ## ##          (return (list (` (lambda [_] (~ value)))))))
 
-## ## (def (. f g)
-## ##   (All [a b c]
-## ##     (-> (-> b c) (-> a b) (-> a c)))
-## ##   (lambda [x]
-## ##     (f (g x))))
-
-## ## (def concat
-## ##   (All [a]
-## ##        (-> (List (List a)) (List a)))
-## ##   (fold ++ #Nil))
-
-## ## (def flat-map
-## ##   (All [a b]
-## ##        (-> (-> a (List b)) (List a) (List b)))
-## ##   (. concat map))
-
-## ## (def (filter p xs)
-## ##   (All [a]
-## ##        (-> (-> a Bool) (List a) (List a)))
-## ##   (case' xs
-## ##          #Nil
-## ##          #Nil
-
-## ##          (#Cons [x xs'])
-## ##          (if (p x)
-## ##            (#Cons [x (filter p xs')])
-## ##            (filter p xs'))))
-
-## ## (deftype (Lux a)
-## ##   (-> CompilerState (Either Text (, CompilerState a))))
-
-## ## (def (first pair)
-## ##   (All [a b] (-> (, a b) a))
-## ##   (case' pair
-## ##          [f s]
-## ##          f))
-
-## ## (def (second pair)
-## ##   (All [a b] (-> (, a b) b))
-## ##   (case' pair
-## ##          [f s]
-## ##          s))
+## (defmacro #export (exec tokens)
+##   (case' (reverse tokens)
+##          (#Cons [value actions])
+##          (let [dummy ($symbol ["" ""])]
+##            (return (:' SyntaxList
+##                        (list (fold (:' (-> Syntax Syntax Syntax)
+##                                        (lambda [post pre]
+##                                          (` (case' (~ pre) (~ dummy) (~ post)))))
+##                                    value
+##                                    actions)))))
+
+##          _
+##          (fail "Wrong syntax for exec")))
+
+## (def #export (print x)
+##   (-> Text (IO (,)))
+##   (io (jvm-invokevirtual java.io.PrintStream print [java.lang.Object]
+##                          (jvm-getstatic java.lang.System out) [x])))
+
+## (def #export (println x)
+##   (-> Text (IO (,)))
+##   (print (text:++ x "\n")))
 
 ## ## (defmacro (loop tokens)
 ## ##   (case' tokens
 ## ##          (#Cons [bindings (#Cons [body #Nil])])
 ## ##          (let [pairs (as-pairs bindings)]
-## ##            (return (list (#Form (#Cons [(` (lambda (~ (#Symbol ["lux" "recur"])) (~ (#Tuple (map first pairs)))
+## ##            (return (list (#Form (#Cons [(` (lambda (~ (#Symbol ["" "recur"])) (~ (#Tuple (map first pairs)))
 ## ##                                               (~ body)))
 ## ##                                         (map second pairs)])))))))
 
-## ## (defmacro (and tokens)
-## ##   (let [as-if (case' tokens
-## ##                      #Nil
-## ##                      (` true)
-
-## ##                      (#Cons [init tests])
-## ##                      (fold (lambda [prev next]
-## ##                              (` (if (~ prev) (~ next) false)))
-## ##                            init
-## ##                            tokens)
-## ##                      )]
-## ##     (return (list as-if))))
-
-## ## (defmacro (or tokens)
-## ##   (let [as-if (case' tokens
-## ##                      #Nil
-## ##                      (` false)
-
-## ##                      (#Cons [init tests])
-## ##                      (fold (lambda [prev next]
-## ##                              (` (if (~ prev) true (~ next))))
-## ##                            init
-## ##                            tokens)
-## ##                      )]
-## ##     (return (list as-if))))
-
-## ## (def (not x)
-## ##   (-> Bool Bool)
-## ##   (case' x
-## ##          true  false
-## ##          false true))
-
-## (defmacro (|> tokens)
-##   (case' tokens
-##          (#Cons [init apps])
-##          (return (list (fold (lambda [acc app]
-##                                (case' app
-##                                       (#Form parts)
-##                                       (#Form (++ parts (list acc)))
-
-##                                       _
-##                                       (` ((~ app) (~ acc)))))
-##                              init
-##                              apps)))))
-
-## ## (def (const x)
-## ##   (All [a b]
-## ##        (-> a (-> b a)))
-## ##   (lambda [_]
-## ##     x))
-
-## ## (def (int> x y)
-## ##   (-> Int Int Bool)
-## ##   (jvm-lgt x y))
-
-## ## (def (int< x y)
-## ##   (-> Int Int Bool)
-## ##   (jvm-llt x y))
-
-## ## (def inc
-## ##   (-> Int Int)
-## ##   (int+  1))
-
-## ## (def dec
-## ##   (-> Int Int)
-## ##   (int+ -1))
-
-## ## (def (repeat n x)
-## ##   (All [a] (-> Int a (List a)))
-## ##   (if (int> n 0)
-## ##     (#Cons [x (repeat (dec n) x)])
-## ##     #Nil))
-
-## ## (def size
-## ##   (All [a]
-## ##        (-> (List a) Int))
-## ##   (fold (lambda [acc _] (inc acc)) 0))
-
-## ## (def (last xs)
-## ##   (All [a]
-## ##        (-> (List a) (Maybe a)))
-## ##   (case' xs
-## ##          #Nil             #None
-## ##          (#Cons [x #Nil]) (#Some x)
-## ##          (#Cons [_ xs'])  (last xs')))
-
-## ## (def (init xs)
-## ##   (All [a]
-## ##        (-> (List a) (Maybe (List a))))
-## ##   (case' xs
-## ##          #Nil             #None
-## ##          (#Cons [_ #Nil]) (#Some #Nil)
-## ##          (#Cons [x xs'])  (case' (init xs')
-## ##                                  (#Some xs'')
-## ##                                  (#Some (#Cons [x xs'']))
-
-## ##                                  _
-## ##                                  (#Some (#Cons [x #Nil])))))
-
-## ## (defmacro (cond tokens)
-## ##   (case' (reverse tokens)
-## ##          (#Cons [else branches'])
-## ##          (return (list (fold (lambda [else branch]
-## ##                                (case' branch
-## ##                                       [test then]
-## ##                                       (` (if (~ test) (~ then) (~ else)))))
-## ##                              else
-## ##                              (|> branches' reverse as-pairs))))))
-
-## ## (def (interleave xs ys)
-## ##   (All [a]
-## ##        (-> (List a) (List a) (List a)))
-## ##   (case' [xs ys]
-## ##          [(#Cons [x xs']) (#Cons [y ys'])]
-## ##          (list+ x y (interleave xs' ys'))
-
-## ##          _
-## ##          #Nil))
-
-## ## (def (interpose sep xs)
-## ##   (All [a]
-## ##        (-> a (List a) (List a)))
-## ##   (case' xs
-## ##          #Nil
-## ##          xs
-
-## ##          (#Cons [x #Nil])
-## ##          xs
-
-## ##          (#Cons [x xs'])
-## ##          (list+ x sep (interpose sep xs'))))
-
-## ## (def (empty? xs)
-## ##   (All [a]
-## ##        (-> (List a) Bool))
-## ##   (case' xs
-## ##          #Nil true
-## ##          _    false))
-
-## ## ## (do-template [<name> <op>]
-## ## ##              (def (<name> p xs)
-## ## ##                (case xs
-## ## ##                  #Nil true
-## ## ##                  (#Cons [x xs']) (<op> (p x) (<name> p xs'))))
-
-## ## ##              [every? and]
-## ## ##              [any?   or])
-
-## ## (def (tuple->list tuple)
-## ##   (-> Syntax (List Syntax))
-## ##   (case' tuple
-## ##          (#Meta [_ (#Tuple list)])
-## ##          list))
-
-## ## (def (zip2 xs ys)
-## ##   (All [a b]
-## ##        (-> (List a) (List b) (List (, a b))))
-## ##   (case' [xs ys]
-## ##          [(#Cons [x xs']) (#Cons [y ys'])]
-## ##          (#Cons [[x y] (zip2 xs' ys')])
-
-## ##          _
-## ##          #Nil))
-
-## ## (def (get-ident x)
-## ##   (-> Syntax Text)
-## ##   (case' x
-## ##          (#Meta [_ (#Symbol [_ ident])])
-## ##          ident))
-
-## ## (def (text-++ x y)
-## ##   (-> Text Text Text)
-## ##   (jvm-invokevirtual java.lang.String "concat" [java.lang.String]
-## ##                      x [y]))
-
-## ## (def (show-env env)
-## ##   ...
-## ##   (|> env (map first) (interpose ", ") (fold text-++ "")))
-
-## ## (def (apply-template env template)
-## ##   (case' template
-## ##          (#Meta [_ (#Symbol [_ ident])])
-## ##          (case' (get ident env)
-## ##                 (#Some subst)
-## ##                 subst
-
-## ##                 _
-## ##                 template)
-
-## ##          (#Meta [_ (#Tuple elems)])
-## ##          (_meta (#Tuple (map (apply-template env) elems)))
-
-## ##          (#Meta [_ (#Form elems)])
-## ##          (_meta (#Form (map (apply-template env) elems)))
-
-## ##          (#Meta [_ (#Record members)])
-## ##          (_meta (#Record (map (lambda [kv]
-## ##                                 (case' kv
-## ##                                        [slot value]
-## ##                                        [(apply-template env slot) (apply-template env value)]))
-## ##                               members)))
-
-## ##          _
-## ##          template))
-
-## ## (defmacro (do-templates tokens)
-## ##   (case' tokens
-## ##          (#Cons [bindings (#Cons [(#Meta [_ (#Tuple templates)]) data])])
-## ##          (let [bindings-list (map get-ident (tuple->list bindings))
-## ##                data-lists (map tuple->list data)
-## ##                apply (lambda [env] (map (apply-template env) templates))]
-## ##            (|> data-lists
-## ##                (map (. apply (zip2 bindings-list)))
-## ##                return))))
-
 ## ## ## (do-template [<name> <offset>]
 ## ## ##              (def <name> (int+ <offset>))
 
 ## ## ##              [inc  1]
 ## ## ##              [dec -1])
 
-## ## (def (int= x y)
-## ##   (-> Int Int Bool)
-## ##   (jvm-leq x y))
-
-## ## (def (int% x y)
-## ##   (-> Int Int Int)
-## ##   (jvm-lrem x y))
-
-## ## (def (int>= x y)
-## ##   (-> Int Int Bool)
-## ##   (or (int= x y)
-## ##       (int> x y)))
-
-## ## (do-templates [<name> <cmp>]
-## ##   [(def (<name> x y)
-## ##      (-> Int Int Int)
-## ##      (if (<cmp> x y)
-## ##        x
-## ##        y))]
-
-## ##   [max int>]
-## ##   [min int<])
-
-## ## (do-templates [<name> <cmp>]
-## ##   [(def (<name> n)
-## ##      (-> Int Bool)
-## ##      (<cmp> n 0))]
-
-## ##   [neg? int<]
-## ##   [pos? int>=])
-
-## ## (def (even? n)
-## ##   (-> Int Bool)
-## ##   (int= 0 (int% n 0)))
-
-## ## (def (odd? n)
-## ##   (-> Int Bool)
-## ##   (not (even? n)))
-
-## ## (do-templates [<name> <done> <step>]
-## ##   [(def (<name> n xs)
-## ##      (All [a]
-## ##           (-> Int (List a) (List a)))
-## ##      (if (int> n 0)
-## ##        (case' xs
-## ##               #Nil            #Nil
-## ##               (#Cons [x xs']) <step>)
-## ##        <done>))]
-
-## ##   [take #Nil (list+ x (take (dec n) xs'))]
-## ##   [drop xs   (drop (dec n) xs')])
-
-## ## (do-templates [<name> <done> <step>]
-## ##   [(def (<name> f xs)
-## ##      (All [a]
-## ##           (-> (-> a Bool) (List a) (List a)))
-## ##      (case' xs
-## ##             #Nil            #Nil
-## ##             (#Cons [x xs']) (if (f x) <step> #Nil)))]
-
-## ##   [take-while #Nil (list+ x (take-while f xs'))]
-## ##   [drop-while xs   (drop-while f xs')])
-
 ## ## ## (defmacro (get@ tokens)
 ## ## ##   (let [output (case' tokens
 ## ## ##                       (#Cons [tag (#Cons [record #Nil])])
@@ -1591,72 +1510,14 @@
 ## ##     [(update@ [#gen-seed] inc state)
 ## ##      (_meta (#Symbol ($ text-++ "__" (show-int (get@ [#gen-seed] state)) "__")))]))
 
-## ## ## (do-template [<name> <member>]
-## ## ##              (def (<name> pair)
-## ## ##                (case' pair
-## ## ##                       [f s]
-## ## ##                       <member>))
-
-## ## ##              [first  f]
-## ## ##              [second s])
-
-## ## (def (show-syntax syntax)
-## ##   (-> Syntax Text)
-## ##   (case' syntax
-## ##          (#Meta [_ (#Bool value)])
-## ##          (jvm-invokevirtual java.lang.Object "toString" []
-## ##                             value [])
-
-## ##          (#Meta [_ (#Int value)])
-## ##          (jvm-invokevirtual java.lang.Object "toString" []
-## ##                             value [])
-
-## ##          (#Meta [_ (#Real value)])
-## ##          (jvm-invokevirtual java.lang.Object "toString" []
-## ##                             value [])
-
-## ##          (#Meta [_ (#Char value)])
-## ##          (jvm-invokevirtual java.lang.Object "toString" []
-## ##                             value [])
-
-## ##          (#Meta [_ (#Text value)])
-## ##          (jvm-invokevirtual java.lang.Object "toString" []
-## ##                             value [])
-
-## ##          (#Meta [_ (#Symbol [module name])])
-## ##          ($ text-++ module ";" name)
-
-## ##          (#Meta [_ (#Tag [module name])])
-## ##          ($ text-++ "#" module ";" name)
-
-## ##          (#Meta [_ (#Tuple members)])
-## ##          ($ text-++ "[" (fold text-++ "" (interpose " " (map show-syntax members))) "]")
-
-## ##          (#Meta [_ (#Form members)])
-## ##          ($ text-++ "(" (fold text-++ "" (interpose " " (map show-syntax members))) ")")
-## ##          ))
-
-## ## ## (defmacro ($keys tokens)
-## ## ##   (case' tokens
-## ## ##          (#Cons [(#Meta [_ (#Tuple fields)]) #Nil])
-## ## ##          (return (list (_meta (#Record (map (lambda [slot]
-## ## ##                                               (case' slot
-## ## ##                                                      (#Meta [_ (#Tag [module name])])
-## ## ##                                                      [($ text-++ module ";" name) (_meta (#Symbol [module name]))]))
-## ## ##                                             fields)))))))
-
-## ## ## (defmacro ($or tokens)
-## ## ##   (case' tokens
-## ## ##          (#Cons [(#Meta [_ (#Tuple patterns)]) (#Cons [body #Nil])])
-## ## ##          (return (flat-map (lambda [pattern] (list pattern body))
-## ## ##                            patterns))))
-
-## ## (def (macro-expand syntax)
-## ##   (-> Syntax (LuxStateM (List Syntax)))
-## ##   (case' syntax
-## ##          (#Form (#Cons [(#Symbol macro-name) args]))
-## ##          (do [macro (get-macro macro-name)]
-## ##            ((:'! macro Macro) args))))
+## ## (do-template [<name> <member>]
+## ##              (def (<name> pair)
+## ##                (case' pair
+## ##                       [f s]
+## ##                       <member>))
+
+## ##              [first  f]
+## ##              [second s])
 
 ## ## (defmacro (case tokens)
 ## ##   (case' tokens
@@ -1687,94 +1548,3 @@
 ## ##                                                             )]
 ## ##                     (recur kind' (++ expanded new-pieces) (++ more-pieces pieces))))
 ## ##            )))
-
-## ## (def (defsyntax tokens)
-## ##   ...)
-
-## ## (deftype (State s a)
-## ##   (-> s (, s a)))
-
-## ## (deftype (Parser a)
-## ##   (State (List Syntax) a))
-
-## ## (def (parse-ctor tokens)
-## ##   (Parser (, Syntax (List Syntax)))
-## ##   (case tokens
-## ##     (list+ (#Symbol name) tokens')
-## ##     [tokens' [(#Symbol name) (list)]]
-
-## ##     (list+ (#Form (list+ (#Symbol name) args)) tokens')
-## ##     [tokens' [(#Symbol name) args]]))
-
-## ## (defsyntax (defsig
-## ##              [[name args] parse-ctor]
-## ##              [anns ($+ $1)])
-## ##   (let [def-body (fold (lambda [body arg] (` (lambda [(~ arg)] (~ body))))
-## ##                        (` (#Record (~ (untemplate-list ...))))
-## ##                        args)]
-## ##     (return (list (` (def (~ name) (~ def-body)))))))
-
-## ## (defsyntax (defstruct
-## ##              [[name args] parse-ctor]
-## ##              signature
-## ##              [defs ($+ $1)])
-## ##   (let [def-body (fold (lambda [body arg] (` (lambda [(~ arg)] (~ body))))
-## ##                        (` (#Record (~ (untemplate-list ...))))
-## ##                        args)]
-## ##     (return (list (` (def (~ name)
-## ##                        (:' (~ def-body) (~ signature))))))))
-
-## ## ## (def (with tokens)
-## ## ##   ...)
-
-## ## (import' lux)
-## ## (module-alias' lux l)
-## ## (import lux #as l #use [map])
-
-## ## (defsyntax #export (All [name (%? %name)] [args %args] body)
-## ##   (let [name' (case name
-## ##                 #None ""
-## ##                 (#Some name) name)
-## ##         arg-replacements (map (lambda [arg]
-## ##                                 [(#Symbol ["" arg]) (` (#Bound (~ arg)))])
-## ##                               args)
-## ##         args' (map (lambda [arg]
-## ##                      (#Symbol ["" arg]))
-## ##                    args)
-## ##         body' (replace-syntax arg-replacements body)]
-## ##     (return (list (` (#AllT [#None (~ name') (#Tuple (list (~@ args')))
-## ##                              (~ body')]))))))
-
-## ## (def (walk-syntax type)
-## ##   (case type
-## ##     (#Meta [_ (#Form (\list& op args))])
-## ##     (case op
-## ##       (#Meta [_ (#Symbol ident)])
-## ##       (do' [macro?? (find-macro ident)]
-## ##            (case macro??
-## ##              (#Some macro)
-## ##              (do' [expansion (macro args)]
-## ##                   (flat-map% walk-syntax expansion))
-
-## ##              #None
-## ##              (do' [flat-map% (map% walk-syntax args)]
-## ##                   (return (list (fold (lambda [fun arg]
-## ##                                          (` (#AppT [(~ fun) (~ arg)])))
-## ##                                        op
-## ##                                        args))))))
-
-## ##       _
-## ##       (do' [flat-map% (map% walk-syntax args)]
-## ##            (return (list (_meta (#Form (list op args')))))))
-
-## ##     _
-## ##     (return (list type))))
-
-## ## (defsyntax #export (type type-syntax)
-## ##   (walk-syntax type-syntax))
-
-## ## (defsyntax #export (deftype [[name args] %usage] body)
-## ##   (return (list (` (def (~ name)
-## ##                      (:' Type
-## ##                         (type (All [(~@ args)]
-## ##                                 (~ body)))))))))