- Some bug fixes.

- More additions to the standard library.

27 files changed, 1299 insertions, 461 deletions

diff --git a/input/lux.lux b/input/lux.lux
index 2bad33439..0c8b73c34 100644
--- a/input/lux.lux
+++ b/input/lux.lux
@@ -10,15 +10,6 @@
 (_jvm_interface "Function" []
   (apply ["java.lang.Object"] "java.lang.Object" ["public" "abstract"]))
 
-## (_jvm_class "lux.MyFunction" "java.lang.Object" ["lux.Function"]
-##             [(foo "java.lang.Object" ["public" "static"])]
-##             (<init> [] "void"
-##                     ["public"]
-##                     (_jvm_invokespecial java.lang.Object <init> [] this []))
-##             (apply [(arg "java.lang.Object")] "java.lang.Object"
-##                    ["public"]
-##                    "YOLO"))
-
 ## Basic types
 (_lux_def Bool (#DataT "java.lang.Boolean"))
 (_lux_export Bool)
@@ -35,6 +26,9 @@
 (_lux_def Text (#DataT "java.lang.String"))
 (_lux_export Text)
 
+(_lux_def Unit (#TupleT #Nil))
+(_lux_export Unit)
+
 (_lux_def Void (#VariantT #Nil))
 (_lux_export Void)
 
@@ -105,6 +99,7 @@
                                                                                      (#Cons [(#BoundT "v")
                                                                                              #Nil])]))])]
                                             #Nil])]))])]))
+(_lux_export Bindings)
 
 ## (deftype (Env k v)
 ##   (& #name Text
@@ -121,6 +116,7 @@
                                                     (#Cons [["lux;closure" (#AppT [(#AppT [Bindings (#BoundT "k")])
                                                                                    (#BoundT "v")])]
                                                             #Nil])])])]))])]))
+(_lux_export Env)
 
 ## (deftype Cursor
 ##   (, Text Int Int))
@@ -855,7 +851,7 @@
       (wrap-meta (form$ (list (tag$ ["lux" "SymbolS"]) (tuple$ (list (text$ module') (text$ name)))))))
 
     [_ (#Meta [_ (#TupleS elems)])]
-    (splice (untemplate replace? subst) (tag$ ["lux" "TupleS"]) elems)
+    (splice replace? (untemplate replace? subst) (tag$ ["lux" "TupleS"]) elems)
 
     [true (#Meta [_ (#FormS (#Cons [(#Meta [_ (#SymbolS ["" "~"])]) (#Cons [unquoted #Nil])]))])]
     unquoted
@@ -937,7 +933,7 @@
                                                      ($' (B' m) (B' a))
                                                      ($' (B' m) (B' b))))]))))
 
-(def'' Maybe:Monad
+(def'' Maybe/Monad
   ($' Monad Maybe)
   {#lux;return
    (lambda return [x]
@@ -949,7 +945,7 @@
        #None     #None
        (#Some a) (f a)))})
 
-(def'' Lux:Monad
+(def'' Lux/Monad
   ($' Monad Lux)
   {#lux;return
    (lambda [x]
@@ -1126,8 +1122,8 @@
   (_lux_case tokens
     (#Cons [(#Meta [_ (#TupleS bindings)]) (#Cons [(#Meta [_ (#TupleS templates)]) data])])
     (_lux_case (_lux_: (, ($' Maybe ($' List Text)) ($' Maybe ($' List ($' List Syntax))))
-                       [(map% Maybe:Monad get-ident bindings)
-                        (map% Maybe:Monad tuple->list data)])
+                       [(map% Maybe/Monad get-ident bindings)
+                        (map% Maybe/Monad tuple->list data)])
       [(#Some bindings') (#Some data')]
       (let [apply (_lux_: (-> RepEnv ($' List Syntax))
                           (lambda [env] (map (apply-template env) templates)))]
@@ -1146,12 +1142,12 @@
      (-> <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]
+  [i=  _jvm_leq Int]
+  [i>  _jvm_lgt Int]
+  [i<  _jvm_llt Int]
+  [r= _jvm_deq Real]
+  [r> _jvm_dgt Real]
+  [r< _jvm_dlt Real]
   )
 
 (do-template [<name> <cmp> <eq> <type>]
@@ -1161,10 +1157,10 @@
        true
        (<eq> x y)))]
 
-  [ int:>=  int:>  int:= Int]
-  [ int:<=  int:<  int:= Int]
-  [real:>= real:> real:= Real]
-  [real:<= real:< real:= Real]
+  [i>= i> i= Int]
+  [i<= i< i= Int]
+  [r>= r> r= Real]
+  [r<= r< r= Real]
   )
 
 (do-template [<name> <cmp> <type>]
@@ -1172,25 +1168,25 @@
      (-> <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]
+  [i+ _jvm_ladd Int]
+  [i- _jvm_lsub Int]
+  [i* _jvm_lmul Int]
+  [i/ _jvm_ldiv Int]
+  [i% _jvm_lrem Int]
+  [r+ _jvm_dadd Real]
+  [r- _jvm_dsub Real]
+  [r* _jvm_dmul Real]
+  [r/ _jvm_ddiv Real]
+  [r% _jvm_drem Real]
   )
 
 (def'' (multiple? div n)
   (-> Int Int Bool)
-  (int:= 0 (int:% n div)))
+  (i= 0 (i% n div)))
 
 (def'' (length list)
   (-> List Int)
-  (foldL (lambda [acc _] (int:+ 1 acc)) 0 list))
+  (foldL (lambda [acc _] (i+ 1 acc)) 0 list))
 
 (def'' #export (not x)
   (-> Bool Bool)
@@ -1244,7 +1240,7 @@
                                        ["" tokens]))]
     (_lux_case tokens'
       (#Cons [(#Meta [_ (#TupleS args)]) (#Cons [body #Nil])])
-      (_lux_case (map% Maybe:Monad get-ident args)
+      (_lux_case (map% Maybe/Monad get-ident args)
         (#Some idents)
         (_lux_case idents
           #Nil
@@ -1309,7 +1305,7 @@
   (-> ($' List (, Text ($' Module Compiler)))
       Text Text Text
       ($' Maybe Macro))
-  (do Maybe:Monad
+  (do Maybe/Monad
     [$module (get module modules)
      gdef (let [{#module-aliases _ #defs bindings #imports _} (_lux_: ($' Module Compiler) $module)]
             (get name bindings))]
@@ -1329,7 +1325,7 @@
 
 (def'' (find-macro ident)
   (-> Ident ($' Lux ($' Maybe Macro)))
-  (do Lux:Monad
+  (do Lux/Monad
     [current-module get-module-name]
     (let [[module name] ident]
       (lambda [state]
@@ -1348,7 +1344,7 @@
   (-> Ident ($' Lux Ident))
   (_lux_case ident
     ["" name]
-    (do Lux:Monad
+    (do Lux/Monad
       [module-name get-module-name]
       (;return (_lux_: Ident [module-name name])))
 
@@ -1356,18 +1352,18 @@
     (return ident)))
 
 (defmacro #export (| tokens)
-  (do Lux:Monad
-    [pairs (map% Lux:Monad
+  (do Lux/Monad
+    [pairs (map% Lux/Monad
                  (_lux_: (-> Syntax ($' Lux Syntax))
                          (lambda [token]
                            (_lux_case token
                              (#Meta [_ (#TagS ident)])
-                             (do Lux:Monad
+                             (do Lux/Monad
                                [ident (normalize ident)]
                                (;return (`' [(~ (text$ (ident->text ident))) (;,)])))
 
                              (#Meta [_ (#FormS (#Cons [(#Meta [_ (#TagS ident)]) (#Cons [value #Nil])]))])
-                             (do Lux:Monad
+                             (do Lux/Monad
                                [ident (normalize ident)]
                                (;return (`' [(~ (text$ (ident->text ident))) (~ value)])))
                              
@@ -1379,13 +1375,13 @@
 (defmacro #export (& tokens)
   (if (not (multiple? 2 (length tokens)))
     (fail "& expects an even number of arguments.")
-    (do Lux:Monad
-      [pairs (map% Lux:Monad
+    (do Lux/Monad
+      [pairs (map% Lux/Monad
                    (_lux_: (-> (, Syntax Syntax) ($' Lux Syntax))
                            (lambda [pair]
                              (_lux_case pair
                                [(#Meta [_ (#TagS ident)]) value]
-                               (do Lux:Monad
+                               (do Lux/Monad
                                  [ident (normalize ident)]
                                  (;return (`' [(~ (text$ (ident->text ident))) (~ value)])))
                                
@@ -1415,30 +1411,30 @@
   (-> Syntax ($' Lux ($' List Syntax)))
   (_lux_case syntax
     (#Meta [_ (#FormS (#Cons [(#Meta [_ (#SymbolS macro-name)]) args]))])
-    (do Lux:Monad
+    (do Lux/Monad
       [macro-name' (normalize macro-name)
        ?macro (find-macro macro-name')]
       (_lux_case ?macro
         (#Some macro)
-        (do Lux:Monad
+        (do Lux/Monad
           [expansion (macro args)
-           expansion' (map% Lux:Monad macro-expand expansion)]
+           expansion' (map% Lux/Monad macro-expand expansion)]
           (;return (list:join expansion')))
         
         #None
-        (do Lux:Monad
-          [parts' (map% Lux:Monad macro-expand (list& (symbol$ macro-name) args))]
+        (do Lux/Monad
+          [parts' (map% Lux/Monad macro-expand (list& (symbol$ macro-name) args))]
           (;return (list (form$ (list:join parts')))))))
 
     (#Meta [_ (#FormS (#Cons [harg targs]))])
-    (do Lux:Monad
+    (do Lux/Monad
       [harg+ (macro-expand harg)
-       targs+ (map% Lux:Monad macro-expand targs)]
+       targs+ (map% Lux/Monad macro-expand targs)]
       (;return (list (form$ (list:++ harg+ (list:join targs+))))))
 
     (#Meta [_ (#TupleS members)])
-    (do Lux:Monad
-      [members' (map% Lux:Monad macro-expand members)]
+    (do Lux/Monad
+      [members' (map% Lux/Monad macro-expand members)]
       (;return (list (tuple$ (list:join members')))))
 
     _
@@ -1464,7 +1460,7 @@
 (defmacro #export (type tokens)
   (_lux_case tokens
     (#Cons [type #Nil])
-    (do Lux:Monad
+    (do Lux/Monad
       [type+ (macro-expand type)]
       (_lux_case type+
         (#Cons [type' #Nil])
@@ -1494,12 +1490,12 @@
 
 (defmacro #export (deftype tokens)
   (let [[export? tokens'] (: (, Bool (List Syntax))
-                             (_lux_case tokens
+                             (_lux_case (:! (List Syntax) tokens)
                                (#Cons [(#Meta [_ (#TagS ["" "export"])]) tokens'])
-                               [true tokens']
+                               [true (:! (List Syntax) tokens')]
 
                                _
-                               [false tokens]))
+                               [false (:! (List Syntax) tokens)]))
         parts (: (Maybe (, Syntax (List Syntax) Syntax))
                  (_lux_case tokens'
                    (#Cons [(#Meta [_ (#SymbolS name)]) (#Cons [type #Nil])])
@@ -1597,20 +1593,20 @@
 (defmacro #export (case tokens)
   (_lux_case tokens
     (#Cons [value branches])
-    (do Lux:Monad
-      [expansions (map% Lux:Monad
+    (do Lux/Monad
+      [expansions (map% Lux/Monad
                         (: (-> (, Syntax Syntax) (Lux (List (, Syntax Syntax))))
                            (lambda expander [branch]
-                                   (let [[pattern body] branch]
-                                     (_lux_case pattern
-                                       (#Meta [_ (#FormS (#Cons [(#Meta [_ (#SymbolS macro-name)]) macro-args]))])
-                                       (do Lux:Monad
-                                         [expansion (macro-expand (form$ (list& (symbol$ macro-name) body macro-args)))
-                                          expansions (map% Lux:Monad expander (as-pairs expansion))]
-                                         (;return (list:join expansions)))
-
-                                       _
-                                       (;return (list branch))))))
+                              (let [[pattern body] branch]
+                                (_lux_case pattern
+                                  (#Meta [_ (#FormS (#Cons [(#Meta [_ (#SymbolS macro-name)]) macro-args]))])
+                                  (do Lux/Monad
+                                    [expansion (macro-expand (form$ (list& (symbol$ macro-name) body macro-args)))
+                                     expansions (map% Lux/Monad expander (as-pairs expansion))]
+                                    (;return (list:join expansions)))
+
+                                  _
+                                  (;return (list branch))))))
                         (as-pairs branches))]
       (;return (list (`' (_lux_case (~ value)
                            (~@ (|> expansions list:join (map rejoin-pair) list:join)))))))
@@ -1621,7 +1617,7 @@
 (defmacro #export (\ tokens)
   (case tokens
     (#Cons [body (#Cons [pattern #Nil])])
-    (do Lux:Monad
+    (do Lux/Monad
       [pattern+ (macro-expand pattern)]
       (case pattern+
         (#Cons [pattern' #Nil])
@@ -1641,8 +1637,8 @@
       (fail "\\or can't have 0 patterns")
 
       _
-      (do Lux:Monad
-        [patterns' (map% Lux:Monad macro-expand patterns)]
+      (do Lux/Monad
+        [patterns' (map% Lux/Monad macro-expand patterns)]
         (;return (list:join (map (lambda [pattern] (list pattern body))
                                  (list:join patterns'))))))
     
@@ -1650,13 +1646,13 @@
     (fail "Wrong syntax for \\or")))
 
 (do-template [<name> <offset>]
-  [(def #export <name> (int:+ <offset>))]
+  [(def #export <name> (i+ <offset>))]
 
   [inc  1]
   [dec -1])
 
 (defmacro #export (` tokens)
-  (do Lux:Monad
+  (do Lux/Monad
     [module-name get-module-name]
     (case tokens
       (\ (list template))
@@ -1678,7 +1674,7 @@
 
 (def (macro-expand-1 token)
   (-> Syntax (Lux Syntax))
-  (do Lux:Monad
+  (do Lux/Monad
     [token+ (macro-expand token)]
     (case token+
       (\ (list token'))
@@ -1688,14 +1684,14 @@
       (fail "Macro expanded to more than 1 element."))))
 
 (defmacro #export (sig tokens)
-  (do Lux:Monad
-    [tokens' (map% Lux:Monad macro-expand tokens)
-     members (map% Lux:Monad
+  (do Lux/Monad
+    [tokens' (map% Lux/Monad macro-expand tokens)
+     members (map% Lux/Monad
                    (: (-> Syntax (Lux (, Ident Syntax)))
                       (lambda [token]
                         (case token
                           (\ (#Meta [_ (#FormS (list (#Meta [_ (#SymbolS ["" "_lux_:"])]) type (#Meta [_ (#SymbolS name)])))]))
-                          (do Lux:Monad
+                          (do Lux/Monad
                             [name' (normalize name)]
                             (;return (: (, Ident Syntax) [name' type])))
 
@@ -1745,14 +1741,14 @@
       (fail "Wrong syntax for defsig"))))
 
 (defmacro #export (struct tokens)
-  (do Lux:Monad
-    [tokens' (map% Lux:Monad macro-expand tokens)
-     members (map% Lux:Monad
+  (do Lux/Monad
+    [tokens' (map% Lux/Monad macro-expand tokens)
+     members (map% Lux/Monad
                    (: (-> Syntax (Lux (, Syntax Syntax)))
                       (lambda [token]
                         (case token
                           (\ (#Meta [_ (#FormS (list (#Meta [_ (#SymbolS ["" "_lux_def"])]) (#Meta [_ (#SymbolS name)]) value))]))
-                          (do Lux:Monad
+                          (do Lux/Monad
                             [name' (normalize name)]
                             (;return (: (, Syntax Syntax) [(tag$ name') value])))
 
@@ -1825,7 +1821,7 @@
 
 (def (extract-defs defs)
   (-> (List Syntax) (Lux (List Text)))
-  (map% Lux:Monad
+  (map% Lux/Monad
         (: (-> Syntax (Lux Text))
            (lambda [def]
              (case def
@@ -1854,12 +1850,12 @@
       (return (: (, Referrals (List Syntax)) [#All tokens']))
 
       (\ (#Meta [_ (#FormS (list& (#Meta [_ (#TagS ["" "only"])]) defs))]))
-      (do Lux:Monad
+      (do Lux/Monad
         [defs' (extract-defs defs)]
         (return (: (, Referrals (List Syntax)) [(#Only defs') tokens'])))
 
       (\ (#Meta [_ (#FormS (list& (#Meta [_ (#TagS ["" "except"])]) defs))]))
-      (do Lux:Monad
+      (do Lux/Monad
         [defs' (extract-defs defs)]
         (return (: (, Referrals (List Syntax)) [(#Except defs') tokens'])))
 
@@ -1871,7 +1867,7 @@
 
 (def (decorate-imports super-name tokens)
   (-> Text (List Syntax) (Lux (List Syntax)))
-  (map% Lux:Monad
+  (map% Lux/Monad
         (: (-> Syntax (Lux Syntax))
            (lambda [token]
              (case token
@@ -1887,8 +1883,8 @@
 
 (def (parse-imports imports)
   (-> (List Syntax) (Lux (List Import)))
-  (do Lux:Monad
-    [referrals' (map% Lux:Monad
+  (do Lux/Monad
+    [referrals' (map% Lux/Monad
                       (: (-> Syntax (Lux (List Import)))
                          (lambda [token]
                            (case token
@@ -1896,7 +1892,7 @@
                              (;return (list [m-name #None #All]))
 
                              (\ (#Meta [_ (#FormS (list& (#Meta [_ (#SymbolS ["" m-name])]) extra))]))
-                             (do Lux:Monad
+                             (do Lux/Monad
                                [alias+extra' (parse-alias extra)
                                 #let [[alias extra'] (: (, (Maybe Text) (List Syntax))
                                                         alias+extra')]
@@ -1976,14 +1972,14 @@
 (def (split-module-contexts module)
   (-> Text (List Text))
   (#Cons [module (let [idx (last-index-of "/" module)]
-                   (if (int:< idx 0)
+                   (if (i< idx 0)
                      #Nil
                      (split-module-contexts (substring2 0 idx module))))]))
 
 (def (split-module module)
   (-> Text (List Text))
   (let [idx (index-of "/" module)]
-    (if (int:< idx 0)
+    (if (i< idx 0)
       (#Cons [module #Nil])
       (#Cons [(substring2 0 idx module)
               (split-module (substring1 (inc idx) module))]))))
@@ -1996,7 +1992,7 @@
     #None
 
     (#Cons [x xs'])
-    (if (int:= idx 0)
+    (if (i= idx 0)
       (#Some x)
       (@ (dec idx) xs')
       )))
@@ -2021,7 +2017,7 @@
 
 (def (clean-module module)
   (-> Text (Lux Text))
-  (do Lux:Monad
+  (do Lux/Monad
     [module-name get-module-name]
     (case (split-module module)
       (\ (list& "." parts))
@@ -2030,7 +2026,7 @@
       parts
       (let [[ups parts'] (split-with (text:= "..") parts)
             num-ups (length ups)]
-        (if (int:= num-ups 0)
+        (if (i= num-ups 0)
           (return module)
           (case (@ num-ups (split-module-contexts module-name))
             #None
@@ -2062,23 +2058,23 @@
     output))
 
 (defmacro #export (import tokens)
-  (do Lux:Monad
+  (do Lux/Monad
     [imports (parse-imports tokens)
-     imports (map% Lux:Monad
+     imports (map% Lux/Monad
                    (: (-> Import (Lux Import))
                       (lambda [import]
                         (case import
                           [m-name m-alias m-referrals]
-                          (do Lux:Monad
+                          (do Lux/Monad
                             [m-name (clean-module m-name)]
                             (;return (: Import [m-name m-alias m-referrals]))))))
                    imports)
-     unknowns' (map% Lux:Monad
+     unknowns' (map% Lux/Monad
                      (: (-> Import (Lux (List Text)))
                         (lambda [import]
                           (case import
                             [m-name _ _]
-                            (do Lux:Monad
+                            (do Lux/Monad
                               [? (module-exists? m-name)]
                               (;return (if ?
                                          (list)
@@ -2087,24 +2083,24 @@
      #let [unknowns (list:join unknowns')]]
     (case unknowns
       #Nil
-      (do Lux:Monad
-        [output' (map% Lux:Monad
+      (do Lux/Monad
+        [output' (map% Lux/Monad
                        (: (-> Import (Lux (List Syntax)))
                           (lambda [import]
                             (case import
                               [m-name m-alias m-referrals]
-                              (do Lux:Monad
+                              (do Lux/Monad
                                 [defs (case m-referrals
                                         #All
                                         (exported-defs m-name)
 
                                         (#Only +defs)
-                                        (do Lux:Monad
+                                        (do Lux/Monad
                                           [*defs (exported-defs m-name)]
                                           (;return (filter (is-member? +defs) *defs)))
                                         
                                         (#Except -defs)
-                                        (do Lux:Monad
+                                        (do Lux/Monad
                                           [*defs (exported-defs m-name)]
                                           (;return (filter (. not (is-member? -defs)) *defs)))
 
@@ -2270,7 +2266,7 @@
 (defmacro #export (? tokens)
   (case tokens
     (\ (list maybe else))
-    (do Lux:Monad
+    (do Lux/Monad
       [g!value (gensym "")]
       (return (list (` (case (~ maybe)
                          (#;Some (~ g!value))
@@ -2292,7 +2288,7 @@
                         body))
 
     (#AppT [F A])
-    (do Maybe:Monad
+    (do Maybe/Monad
       [type-fn* (apply-type F A)]
       (apply-type type-fn* param))
     
@@ -2408,7 +2404,7 @@
 ##           {#source source #modules modules
 ##            #envs   envs   #types   types   #host           host
 ##            #seed   seed   #seen-sources seen-sources #eval? eval?} state]
-##       (do Maybe:Monad
+##       (do Maybe/Monad
 ##         [module (get v-prefix modules)
 ##          #let [{#defs defs #module-aliases _ #imports _} module]
 ##          def (get v-name defs)
@@ -2421,7 +2417,7 @@
 
 (def (find-var-type name)
   (-> Ident (Lux Type))
-  (do Lux:Monad
+  (do Lux/Monad
     [name' (normalize name)]
     (lambda [state]
       (case (find-in-env name state)
@@ -2444,7 +2440,7 @@
     (\ (list struct body))
     (case struct
       (#Meta [_ (#SymbolS name)])
-      (do Lux:Monad
+      (do Lux/Monad
         [struct-type (find-var-type name)]
         (case (resolve-struct-type struct-type)
           (#Some (#RecordT slots))
@@ -2491,7 +2487,7 @@
       (f x y))))
 
 (defmacro #export (cond tokens)
-  (if (int:= 0 (int:% (length tokens) 2))
+  (if (i= 0 (i% (length tokens) 2))
     (fail "cond requires an even number of arguments.")
     (case (reverse tokens)
       (\ (list& else branches'))
@@ -2510,13 +2506,13 @@
     (\ (list (#Meta [_ (#TagS slot')]) record))
     (case record
       (#Meta [_ (#SymbolS name)])
-      (do Lux:Monad
+      (do Lux/Monad
         [type (find-var-type name)
          g!blank (gensym "")
          g!output (gensym "")]
         (case (resolve-struct-type type)
           (#Some (#RecordT slots))
-          (do Lux:Monad
+          (do Lux/Monad
             [slot (normalize slot')]
             (let [[s-prefix s-name] (: Ident slot)
                   pattern (record$ (map (: (-> (, Text Type) (, Syntax Syntax))
@@ -2534,7 +2530,7 @@
           (fail "get@ can only use records.")))
       
       _
-      (do Lux:Monad
+      (do Lux/Monad
         [_record (gensym "")]
         (return (list (` (let [(~ _record) (~ record)]
                            (get@ (~ (tag$ slot')) (~ _record))))))))
@@ -2545,7 +2541,7 @@
 (defmacro #export (open tokens)
   (case tokens
     (\ (list (#Meta [_ (#SymbolS struct-name)])))
-    (do Lux:Monad
+    (do Lux/Monad
       [struct-type (find-var-type struct-name)]
       (case (resolve-struct-type struct-type)
         (#Some (#RecordT slots))
@@ -2579,8 +2575,8 @@
 (defmacro #export (:: tokens)
   (case tokens
     (\ (list& start parts))
-    (do Lux:Monad
-      [output (foldL% Lux:Monad
+    (do Lux/Monad
+      [output (foldL% Lux/Monad
                       (: (-> Syntax Syntax (Lux Syntax))
                          (lambda [so-far part]
                            (case part
@@ -2604,16 +2600,16 @@
     (\ (list (#Meta [_ (#TagS slot')]) value record))
     (case record
       (#Meta [_ (#SymbolS name)])
-      (do Lux:Monad
+      (do Lux/Monad
         [type (find-var-type name)]
         (case (resolve-struct-type type)
           (#Some (#RecordT slots))
-          (do Lux:Monad
-            [pattern' (map% Lux:Monad
+          (do Lux/Monad
+            [pattern' (map% Lux/Monad
                             (: (-> (, Text Type) (Lux (, Text Syntax)))
                                (lambda [slot]
                                  (let [[r-slot-name r-type] slot]
-                                   (do Lux:Monad
+                                   (do Lux/Monad
                                      [g!slot (gensym "")]
                                      (return [r-slot-name g!slot])))))
                             slots)
@@ -2639,7 +2635,7 @@
           (fail "set@ can only use records.")))
       
       _
-      (do Lux:Monad
+      (do Lux/Monad
         [_record (gensym "")]
         (return (list (` (let [(~ _record) (~ record)]
                            (set@ (~ (tag$ slot')) (~ value) (~ _record))))))))
@@ -2652,16 +2648,16 @@
     (\ (list (#Meta [_ (#TagS slot')]) fun record))
     (case record
       (#Meta [_ (#SymbolS name)])
-      (do Lux:Monad
+      (do Lux/Monad
         [type (find-var-type name)]
         (case (resolve-struct-type type)
           (#Some (#RecordT slots))
-          (do Lux:Monad
-            [pattern' (map% Lux:Monad
+          (do Lux/Monad
+            [pattern' (map% Lux/Monad
                             (: (-> (, Text Type) (Lux (, Text Syntax)))
                                (lambda [slot]
                                  (let [[r-slot-name r-type] slot]
-                                   (do Lux:Monad
+                                   (do Lux/Monad
                                      [g!slot (gensym "")]
                                      (return [r-slot-name g!slot])))))
                             slots)
@@ -2687,7 +2683,7 @@
           (fail "update@ can only use records.")))
       
       _
-      (do Lux:Monad
+      (do Lux/Monad
         [_record (gensym "")]
         (return (list (` (let [(~ _record) (~ record)]
                            (update@ (~ (tag$ slot')) (~ fun) (~ _record))))))))
@@ -2695,6 +2691,33 @@
     _
     (fail "Wrong syntax for update@")))
 
+(defmacro #export (\template tokens)
+  (case tokens
+    (\ (list (#Meta [_ (#TupleS data)])
+             (#Meta [_ (#TupleS bindings)])
+             (#Meta [_ (#TupleS templates)])))
+    (case (: (Maybe (List Syntax))
+             (do Maybe/Monad
+               [bindings' (map% Maybe/Monad get-ident bindings)
+                data' (map% Maybe/Monad tuple->list data)]
+               (let [apply (: (-> RepEnv (List Syntax))
+                              (lambda [env] (map (apply-template env) templates)))]
+                 (|> data'
+                     (join-map (. apply (make-env bindings')))
+                     ;return))))
+      (#Some output)
+      (return output)
+      
+      #None
+      (fail "Wrong syntax for \\template"))
+    
+    _
+    (fail "Wrong syntax for \\template")))
+
+(def #export complement
+  (All [a] (-> (-> a Bool) (-> a Bool)))
+  (. not))
+
 ## (defmacro #export (loop tokens)
 ##   (case tokens
 ##     (\ (list bindings body))
@@ -2702,14 +2725,14 @@
 ##           vars (map first pairs)
 ##           inits (map second pairs)]
 ##       (if (every? symbol? inits)
-##         (do Lux:Monad
-##           [inits' (map% Maybe:Monad get-ident inits)
-##            init-types (map% Maybe:Monad find-var-type inits')]
+##         (do Lux/Monad
+##           [inits' (map% Maybe/Monad get-ident inits)
+##            init-types (map% Maybe/Monad find-var-type inits')]
 ##           (return (list (` ((lambda (~ (#SymbolS ["" "recur"])) [(~@ vars)]
 ##                                (~ body))
 ##                             (~@ inits))))))
-##         (do Lux:Monad
-##           [aliases (map% Maybe:Monad (lambda [_] (gensym "")) inits)]
+##         (do Lux/Monad
+##           [aliases (map% Maybe/Monad (lambda [_] (gensym "")) inits)]
 ##           (return (list (` (let [(~@ (interleave aliases inits))]
 ##                              (loop [(~@ (interleave vars aliases))]
 ##                                (~ body)))))))))
diff --git a/input/lux/codata/stream.lux b/input/lux/codata/stream.lux
index 1bfd19292..1d6dd1b50 100644
--- a/input/lux/codata/stream.lux
+++ b/input/lux/codata/stream.lux
@@ -7,57 +7,127 @@
 ##   You must not remove this notice, or any other, from this software.
 
 (;import lux
-         (lux (control (lazy #as L #refer #all))))
+         (lux (control (lazy #as L #refer #all)
+                       (functor #as F #refer #all)
+                       (monad #as M #refer #all)
+                       (comonad #as CM #refer #all))
+              (meta lux
+                    macro
+                    syntax)
+              (data (list #as l #refer (#only list list& List/Monad)))))
 
-## Types
+## [Types]
 (deftype #export (Stream a)
   (Lazy (, a (Stream a))))
 
-## Functions
+## [Utils]
+(def (cycle' x xs init full)
+  (All [a]
+    (-> a (List a) a (List a) (Stream a)))
+  (case xs
+    #;Nil            (cycle' init full init full)
+    (#;Cons [y xs']) (... [x (cycle' y xs' init full)])))
+
+## [Functions]
 (def #export (iterate f x)
   (All [a]
     (-> (-> a a) a (Stream a)))
   (... [x (iterate f (f x))]))
 
-## (def #export (take n xs)
-##   (All [a]
-##     (-> Int (Stream a) (List a)))
-##   (if (int:> n 0)
-##     (let [[x xs'] (! xs)]
-##       (list& x (take (dec n) xs')))
-##     (list)))
-
-## (def #export (drop n xs)
-##   (All [a]
-##     (-> Int (Stream a) (Stream a)))
-##   (if (int:> n 0)
-##     (drop (dec n) (get@ 1 (! xs)))
-##     xs))
-
-## Pattern-matching
-## (defmacro #export (\stream tokens)
-##   (case tokens
-##     (\ (list& body patterns'))
-##     (do Lux:Monad
-##       [patterns (map% Lux:Monad M;macro-expand-1 patterns')
-##        g!s (M;gensym "s")
-##        #let [patterns+ (do List:Monad
-##                          [pattern (reverse patterns)]
-##                          (list (` [(~ pattern) (~ g!s)]) (` (L;! (~ g!s)))))]]
-##       (wrap (list g!s
-##                   (` (;let [(~@ patterns+)]
-##                            (~ body))))))
-
-##     _
-##     "Wrong syntax for \stream"))
-
-## (defsyntax #export (\stream body [patterns' (+$ id$)])
-##   (do Lux:Monad
-##     [patterns (map% Lux:Monad M;macro-expand-1 patterns')
-##      g!s (M;gensym "s")
-##      #let [patterns+ (do List:Monad
-##                        [pattern (reverse patterns)]
-##                        (list (` [(~ pattern) (~ g!s)]) (` (L;! (~ g!s)))))]]
-##     (wrap (list g!s
-##                 (` (;let [(~@ patterns+)]
-##                          (~ body)))))))
+(def #export (repeat x)
+  (All [a]
+    (-> a (Stream a)))
+  (... [x (repeat x)]))
+
+(def #export (cycle xs)
+  (All [a]
+    (-> (List a) (Maybe (Stream a))))
+  (case xs
+    #;Nil            #;None
+    (#;Cons [x xs']) (#;Some (cycle' x xs' x xs'))))
+
+(do-template [<name> <return> <part>]
+  [(def #export (<name> s)
+     (All [a] (-> (Stream a) <return>))
+     (let [[h t] (! s)]
+       <part>))]
+
+  [head a          h]
+  [tail (Stream a) t])
+
+(def #export (@ idx s)
+  (All [a] (-> Int (Stream a) a))
+  (let [[h t] (! s)]
+    (if (i> idx 0)
+      (@ (dec idx) t)
+      h)))
+
+(do-template [<taker> <dropper> <splitter> <det-type> <det-test> <det-step>]
+  [(def #export (<taker> det xs)
+     (All [a]
+       (-> <det-type> (Stream a) (List a)))
+     (let [[x xs'] (! xs)]
+       (if <det-test>
+         (list& x (<taker> <det-step> xs'))
+         (list))))
+
+   (def #export (<dropper> det xs)
+     (All [a]
+       (-> <det-type> (Stream a) (Stream a)))
+     (let [[x xs'] (! xs)]
+       (if <det-test>
+         (<dropper> <det-step> xs')
+         xs)))
+
+   (def #export (<splitter> det xs)
+     (All [a]
+       (-> <det-type> (Stream a) (, (List a) (Stream a))))
+     (let [[x xs'] (! xs)]
+       (if <det-test>
+         (let [[tail next] (<splitter> <det-step> xs')]
+           [(#;Cons [x tail]) next])
+         [(list) xs])))]
+  
+  [take-while drop-while split-with (-> a Bool) (det x)    det]
+  [take       drop       split      Int         (i> det 0) (dec det)]
+  )
+
+(def #export (unfold step init)
+  (All [a b]
+    (-> (-> a (, a b)) a (Stream b)))
+  (let [[next x] (step init)]
+    (... [x (unfold step next)])))
+
+(def #export (filter p xs)
+  (All [a] (-> (-> a Bool) (Stream a) (Stream a)))
+  (let [[x xs'] (! xs)]
+    (if (p x)
+      (... [x (filter p xs')])
+      (filter p xs'))))
+
+(def #export (partition p xs)
+  (All [a] (-> (-> a Bool) (Stream a) (, (Stream a) (Stream a))))
+  [(filter p xs) (filter (complement p) xs)])
+
+## [Structures]
+(defstruct #export Stream/Functor (Functor Stream)
+  (def (F;map f fa)
+    (let [[h t] (! fa)]
+      (... [(f h) (F;map f t)]))))
+
+(defstruct #export Stream/CoMonad (CoMonad Stream)
+  (def CM;_functor Stream/Functor)
+  (def CM;unwrap head)
+  (def (CM;split wa)
+    (:: Stream/Functor (F;map repeat wa))))
+
+## [Pattern-matching]
+(defsyntax #export (\stream body [patterns' (+^ id^)])
+  (do Lux/Monad
+    [patterns (map% Lux/Monad macro-expand-1 patterns')
+     g!s (gensym "s")
+     #let [patterns+ (: (List Syntax)
+                        (do List/Monad
+                          [pattern (l;reverse patterns)]
+                          (list (` [(~ pattern) (~ g!s)]) (` (L;! (~ g!s))))))]]
+    (M;wrap (list g!s (` (;let [(~@ patterns+)] (~ body)))))))
diff --git a/input/lux/control/functor.lux b/input/lux/control/functor.lux
index 3362dd21a..6a9dcfff8 100644
--- a/input/lux/control/functor.lux
+++ b/input/lux/control/functor.lux
@@ -6,30 +6,10 @@
 ##   the terms of this license.
 ##   You must not remove this notice, or any other, from this software.
 
-(;import lux
-         (lux/data state))
+(;import lux)
 
 ## Signatures
 (defsig #export (Functor f)
   (: (All [a b]
        (-> (-> a b) (f a) (f b)))
      map))
-
-## Structures
-(defstruct #export Maybe:Functor (Functor Maybe)
-  (def (map f ma)
-    (case ma
-      #;None     #;None
-      (#;Some a) (#;Some (f a)))))
-
-(defstruct #export List:Functor (Functor List)
-  (def (map f ma)
-    (case ma
-      #;Nil            #;Nil
-      (#;Cons [a ma']) (#;Cons [(f a) (map f ma')]))))
-
-(defstruct #export State:Functor (Functor State)
-  (def (map f ma)
-    (lambda [state]
-      (let [[state' a] (ma state)]
-        [state' (f a)]))))
diff --git a/input/lux/control/lazy.lux b/input/lux/control/lazy.lux
index 83f094592..fca63179e 100644
--- a/input/lux/control/lazy.lux
+++ b/input/lux/control/lazy.lux
@@ -34,12 +34,12 @@
   (thunk id))
 
 ## Structs
-(defstruct #export Lazy:Functor (Functor Lazy)
+(defstruct #export Lazy/Functor (Functor Lazy)
   (def (F;map f ma)
     (... (f (! ma)))))
 
-(defstruct #export Lazy:Monad (Monad Lazy)
-  (def M;_functor Lazy:Functor)
+(defstruct #export Lazy/Monad (Monad Lazy)
+  (def M;_functor Lazy/Functor)
 
   (def (M;wrap a)
     (... a))
diff --git a/input/lux/control/monad.lux b/input/lux/control/monad.lux
index 2ca541574..b5552f987 100644
--- a/input/lux/control/monad.lux
+++ b/input/lux/control/monad.lux
@@ -7,13 +7,38 @@
 ##   You must not remove this notice, or any other, from this software.
 
 (;import lux
-         (lux/data list
-                   state)
          (.. (functor #as F)
              (monoid #as M))
          lux/meta/macro)
 
-## Signatures
+## [Utils]
+(def (foldL f init xs)
+  (All [a b]
+    (-> (-> a b a) a (List b) a)) 
+  (case xs
+    #;Nil
+    init
+
+    (#;Cons [x xs'])
+    (foldL f (f init x) xs')))
+
+(def (reverse xs)
+  (All [a]
+    (-> (List a) (List a)))
+  (foldL (lambda [tail head] (#;Cons [head tail]))
+         #;Nil
+         xs))
+
+(def (as-pairs xs)
+  (All [a] (-> (List a) (List (, a a))))
+  (case xs
+    (#;Cons [x1 (#;Cons [x2 xs'])])
+    (#;Cons [[x1 x2] (as-pairs xs')])
+
+    _
+    #;Nil))
+
+## [Signatures]
 (defsig #export (Monad m)
   (: (F;Functor m)
      _functor)
@@ -24,10 +49,11 @@
        (-> (m (m a)) (m a)))
      join))
 
-## Syntax
+## [Syntax]
 (defmacro #export (do tokens state)
   (case tokens
-    (\ (list monad (#;Meta [_ (#;TupleS bindings)]) body))
+    ## (\ (list monad (#;Meta [_ (#;TupleS bindings)]) body))
+    (#;Cons [monad (#;Cons [(#;Meta [_ (#;TupleS bindings)]) (#;Cons [body #;Nil])])])
     (let [body' (foldL (: (-> Syntax (, Syntax Syntax) Syntax)
                           (lambda [body' binding]
                             (let [[var value] binding]
@@ -43,49 +69,15 @@
                                 ))))
                        body
                        (reverse (as-pairs bindings)))]
-      (#;Right [state (list (` (;case (~ monad)
-                                      {#;;_functor ;;_functor #;;wrap ;;wrap #;;join ;;join}
-                                      (~ body'))))]))
+      (#;Right [state (#;Cons [(` (;case (~ monad)
+                                         {#;;_functor ;;_functor #;;wrap ;;wrap #;;join ;;join}
+                                         (~ body')))
+                               #;Nil])]))
 
     _
     (#;Left "Wrong syntax for do")))
 
-## Structures
-(defstruct #export Maybe:Monad (Monad Maybe)
-  (def _functor F;Maybe:Functor)
-
-  (def (wrap x)
-    (#;Some x))
-
-  (def (join mma)
-    (case mma
-      #;None      #;None
-      (#;Some xs) xs)))
-
-(defstruct #export List:Monad (Monad List)
-  (def _functor F;List:Functor)
-
-  (def (wrap x)
-    (#;Cons [x #;Nil]))
-
-  (def (join xss)
-    (using M;List:Monoid
-      (foldL M;++ M;unit xss))))
-
-(defstruct #export State:Monad (All [s]
-                                 (Monad (State s)))
-  (def _functor F;State:Functor)
-
-  (def (wrap x)
-    (lambda [state]
-      [state x]))
-
-  (def (join mma)
-    (lambda [state]
-      (let [[state' ma] (mma state)]
-        (ma state')))))
-
-## Functions
+## [Functions]
 (def #export (bind m f ma)
   (All [m a b]
     (-> (Monad m) (-> a (m b)) (m a) (m b)))
diff --git a/input/lux/control/monoid.lux b/input/lux/control/monoid.lux
index cfb282c52..d32baabc5 100644
--- a/input/lux/control/monoid.lux
+++ b/input/lux/control/monoid.lux
@@ -6,9 +6,7 @@
 ##   the terms of this license.
 ##   You must not remove this notice, or any other, from this software.
 
-(;import lux
-         (lux/data ord
-                   (bounded #as B)))
+(;import lux)
 
 ## Signatures
 (defsig #export (Monoid a)
@@ -24,34 +22,3 @@
   (struct
     (def unit unit)
     (def ++ ++)))
-
-## Structures
-(defstruct #export Maybe:Monoid (Monoid Maybe)
-  (def unit #;None)
-  (def (++ xs ys)
-    (case xs
-      #;None     ys
-      (#;Some x) (#;Some x))))
-
-(defstruct #export List:Monoid (All [a]
-                                 (Monoid (List a)))
-  (def unit #;Nil)
-  (def (++ xs ys)
-    (case xs
-      #;Nil            ys
-      (#;Cons [x xs']) (#;Cons [x (++ xs' ys)]))))
-
-(do-template [<name> <type> <unit> <++>]
-  [(defstruct #export <name> (Monoid <type>)
-     (def unit <unit>)
-     (def ++ <++>))]
-
-  [ IntAdd:Monoid  Int 0    int:+]
-  [ IntMul:Monoid  Int 1    int:*]
-  [RealAdd:Monoid Real 0.0 real:+]
-  [RealMul:Monoid Real 1.0 real:*]
-  [ IntMax:Monoid   Int (::  B;Int:Bounded B;bottom)  (max  Int:Ord)]
-  [ IntMin:Monoid   Int (::  B;Int:Bounded B;top)     (min  Int:Ord)]
-  [RealMax:Monoid  Real (:: B;Real:Bounded B;bottom)  (max Real:Ord)]
-  [RealMin:Monoid  Real (:: B;Real:Bounded B;top)     (min Real:Ord)]
-  )
diff --git a/input/lux/data/bounded.lux b/input/lux/data/bounded.lux
index 14f4d2e86..458fbc0df 100644
--- a/input/lux/data/bounded.lux
+++ b/input/lux/data/bounded.lux
@@ -22,5 +22,5 @@
      (def top <top>)
      (def bottom <bottom>))]
 
-  [Int:Bounded  Int  (_jvm_getstatic java.lang.Long   MAX_VALUE) (_jvm_getstatic java.lang.Long   MIN_VALUE)]
-  [Real:Bounded Real (_jvm_getstatic java.lang.Double MAX_VALUE) (_jvm_getstatic java.lang.Double MIN_VALUE)])
+  [ Int/Bounded  Int (_jvm_getstatic java.lang.Long   MAX_VALUE) (_jvm_getstatic java.lang.Long   MIN_VALUE)]
+  [Real/Bounded Real (_jvm_getstatic java.lang.Double MAX_VALUE) (_jvm_getstatic java.lang.Double MIN_VALUE)])
diff --git a/input/lux/data/dict.lux b/input/lux/data/dict.lux
index 8bd6635fd..63a66d49b 100644
--- a/input/lux/data/dict.lux
+++ b/input/lux/data/dict.lux
@@ -69,7 +69,7 @@
       (#;Cons [[k' v'] (pl-remove eq k kvs')]))))
 
 ## Structs
-(defstruct #export PList:Dict (Dict PList)
+(defstruct #export PList/Dict (Dict PList)
   (def (get k plist)
     (let [(#PList [eq kvs]) plist]
       (pl-get eq k kvs)))
diff --git a/input/lux/data/either.lux b/input/lux/data/either.lux
new file mode 100644
index 000000000..7166688b5
--- /dev/null
+++ b/input/lux/data/either.lux
@@ -0,0 +1,46 @@
+##   Copyright (c) Eduardo Julian. All rights reserved.
+##   The use and distribution terms for this software are covered by the
+##   Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
+##   which can be found in the file epl-v10.html at the root of this distribution.
+##   By using this software in any fashion, you are agreeing to be bound by
+##   the terms of this license.
+##   You must not remove this notice, or any other, from this software.
+
+(;import lux
+         (lux/data (list #refer (#except partition))))
+
+## [Types]
+## (deftype (Either l r)
+##   (| (#;Left l)
+##      (#;Right r)))
+
+## [Functions]
+(def #export (either f g e)
+  (All [a b c] (-> (-> a c) (-> b c) (Either a b) c))
+  (case e
+    (#;Left x)  (f x)
+    (#;Right x) (g x)))
+
+(do-template [<name> <side> <tag>]
+  [(def #export (<name> es)
+     (All [a b] (-> (List (Either a b)) (List <side>)))
+     (case es
+       #;Nil                    #;Nil
+       (#;Cons [(<tag> x) es']) (#;Cons [x (<name> es')])
+       (#;Cons [_ es'])         (<name> es')))]
+
+  [lefts  a #;Left]
+  [rights b #;Right]
+  )
+
+(def #export (partition es)
+  (All [a b] (-> (List (Either a b)) (, (List a) (List b))))
+  (foldL (: (All [a b]
+              (-> (, (List a) (List b)) (Either a b) (, (List a) (List b))))
+            (lambda [tails e]
+              (let [[ltail rtail] tails]
+                (case e
+                  (#;Left x)  [(#;Cons [x ltail]) rtail]
+                  (#;Right x) [ltail (#;Cons [x rtail])]))))
+         [(list) (list)]
+         (reverse es)))
diff --git a/input/lux/data/eq.lux b/input/lux/data/eq.lux
index 948f8e2ab..191e6a885 100644
--- a/input/lux/data/eq.lux
+++ b/input/lux/data/eq.lux
@@ -14,7 +14,7 @@
      =))
 
 ## Structures
-(defstruct #export Bool:Eq (Eq Bool)
+(defstruct #export Bool/Eq (Eq Bool)
   (def (= x y)
     (case (: (, Bool Bool) [x y])
       (\or [true true] [false false])
@@ -22,14 +22,3 @@
 
       _
       false)))
-
-(defstruct #export Int:Eq (Eq Int)
-  (def = int:=))
-
-(defstruct #export Real:Eq (Eq Real)
-  (def = real:=))
-
-(defstruct #export Text:Eq (Eq Text)
-  (def (= x y)
-    (_jvm_invokevirtual java.lang.Object equals [java.lang.Object]
-                        x [y])))
diff --git a/input/lux/data/error.lux b/input/lux/data/error.lux
new file mode 100644
index 000000000..cb5c309a6
--- /dev/null
+++ b/input/lux/data/error.lux
@@ -0,0 +1,34 @@
+##   Copyright (c) Eduardo Julian. All rights reserved.
+##   The use and distribution terms for this software are covered by the
+##   Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
+##   which can be found in the file epl-v10.html at the root of this distribution.
+##   By using this software in any fashion, you are agreeing to be bound by
+##   the terms of this license.
+##   You must not remove this notice, or any other, from this software.
+
+(;import lux
+         (lux/control (functor #as F #refer #all)
+                      (monad #as M #refer #all)))
+
+## [Types]
+(deftype #export (Error a)
+  (| (#Fail Text)
+     (#Ok a)))
+
+## [Structures]
+(defstruct #export Error/Functor (Functor Error)
+  (def (F;map f ma)
+    (case ma
+      (#Fail msg) (#Fail msg)
+      (#Ok datum) (#Ok (f datum)))))
+
+(defstruct #export Error/Monad (Monad Error)
+  (def M;_functor Error/Functor)
+
+  (def (M;wrap a)
+    (#Ok a))
+
+  (def (M;join mma)
+    (case mma
+      (#Fail msg) (#Fail msg)
+      (#Ok ma)    ma)))
diff --git a/input/lux/data/id.lux b/input/lux/data/id.lux
new file mode 100644
index 000000000..0e3bdbee6
--- /dev/null
+++ b/input/lux/data/id.lux
@@ -0,0 +1,28 @@
+##   Copyright (c) Eduardo Julian. All rights reserved.
+##   The use and distribution terms for this software are covered by the
+##   Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
+##   which can be found in the file epl-v10.html at the root of this distribution.
+##   By using this software in any fashion, you are agreeing to be bound by
+##   the terms of this license.
+##   You must not remove this notice, or any other, from this software.
+
+(;import lux
+         (lux/control (functor #as F #refer #all)
+                      (monad #as M #refer #all)))
+
+## [Types]
+(deftype #export (Id a)
+  (| (#Id a)))
+
+## [Structures]
+(defstruct #export Id/Functor (Functor Id)
+  (def (F;map f fa)
+    (let [(#Id a) fa]
+      (#Id (f a)))))
+
+(defstruct #export Id/Monad (Monad Id)
+  (def M;_functor Id/Functor)
+  (def (M;wrap a) (#Id a))
+  (def (M;join mma)
+    (let [(#Id ma) mma]
+      ma)))
diff --git a/input/lux/data/io.lux b/input/lux/data/io.lux
index ab74daefd..c08023df5 100644
--- a/input/lux/data/io.lux
+++ b/input/lux/data/io.lux
@@ -27,12 +27,12 @@
     (#;Left "Wrong syntax for io")))
 
 ## Structures
-(defstruct #export IO:Functor (F;Functor IO)
+(defstruct #export IO/Functor (F;Functor IO)
   (def (F;map f ma)
     (io (f (ma [])))))
 
-(defstruct #export IO:Monad (M;Monad IO)
-  (def M;_functor IO:Functor)
+(defstruct #export IO/Monad (M;Monad IO)
+  (def M;_functor IO/Functor)
   
   (def (M;wrap x)
     (io x))
diff --git a/input/lux/data/list.lux b/input/lux/data/list.lux
index edbdb6160..450dee275 100644
--- a/input/lux/data/list.lux
+++ b/input/lux/data/list.lux
@@ -6,7 +6,10 @@
 ##   the terms of this license.
 ##   You must not remove this notice, or any other, from this software.
 
-(;import (lux #refer (#except reverse as-pairs))
+(;import lux
+         (lux/control (monoid #as m #refer #all)
+                      (functor #as F #refer #all)
+                      (monad #as M #refer #all))
          lux/meta/macro)
 
 ## Types
@@ -54,6 +57,10 @@
       (#;Cons [x (filter p xs')])
       (filter p xs'))))
 
+(def #export (partition p xs)
+  (All [a] (-> (-> a Bool) (List a) (, (List a) (List a))))
+  [(filter p xs) (filter (complement p) xs)])
+
 (def #export (as-pairs xs)
   (All [a] (-> (List a) (List (, a a))))
   (case xs
@@ -67,7 +74,7 @@
   [(def #export (<name> n xs)
      (All [a]
        (-> Int (List a) (List a)))
-     (if (int:> n 0)
+     (if (i> n 0)
        (case xs
          #;Nil
          #;Nil
@@ -97,16 +104,16 @@
   [drop-while (drop-while p xs') xs]
   )
 
-(def #export (split-at n xs)
+(def #export (split n xs)
   (All [a]
     (-> Int (List a) (, (List a) (List a))))
-  (if (int:> n 0)
+  (if (i> n 0)
     (case xs
       #;Nil
       [#;Nil #;Nil]
       
       (#;Cons [x xs'])
-      (let [[tail rest] (split-at (dec n) xs')]
+      (let [[tail rest] (split (dec n) xs')]
         [(#;Cons [x tail]) rest]))
     [#;Nil xs]))
 
@@ -131,7 +138,7 @@
 (def #export (repeat n x)
   (All [a]
     (-> Int a (List a)))
-  (if (int:> n 0)
+  (if (i> n 0)
     (#;Cons [x (repeat (dec n) x)])
     #;Nil))
 
@@ -175,7 +182,7 @@
 
 (def #export (size list)
   (-> List Int)
-  (foldL (lambda [acc _] (int:+ 1 acc)) 0 list))
+  (foldL (lambda [acc _] (i+ 1 acc)) 0 list))
 
 (do-template [<name> <init> <op>]
   [(def #export (<name> p xs)
@@ -194,7 +201,7 @@
     #;None
 
     (#;Cons [x xs'])
-    (if (int:= 0 i)
+    (if (i= 0 i)
       (#;Some x)
       (@ (dec i) xs'))))
 
@@ -216,3 +223,28 @@
 
     _
     (#;Left "Wrong syntax for list&")))
+
+## Structures
+(defstruct #export List/Monoid (All [a]
+                                 (Monoid (List a)))
+  (def m;unit #;Nil)
+  (def (m;++ xs ys)
+    (case xs
+      #;Nil            ys
+      (#;Cons [x xs']) (#;Cons [x (m;++ xs' ys)]))))
+
+(defstruct #export List/Functor (Functor List)
+  (def (F;map f ma)
+    (case ma
+      #;Nil            #;Nil
+      (#;Cons [a ma']) (#;Cons [(f a) (F;map f ma')]))))
+
+(defstruct #export List/Monad (Monad List)
+  (def M;_functor List/Functor)
+
+  (def (M;wrap a)
+    (#;Cons [a #;Nil]))
+
+  (def (M;join mma)
+    (using List/Monoid
+      (foldL m;++ m;unit mma))))
diff --git a/input/lux/data/maybe.lux b/input/lux/data/maybe.lux
new file mode 100644
index 000000000..faec53c2e
--- /dev/null
+++ b/input/lux/data/maybe.lux
@@ -0,0 +1,42 @@
+##   Copyright (c) Eduardo Julian. All rights reserved.
+##   The use and distribution terms for this software are covered by the
+##   Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
+##   which can be found in the file epl-v10.html at the root of this distribution.
+##   By using this software in any fashion, you are agreeing to be bound by
+##   the terms of this license.
+##   You must not remove this notice, or any other, from this software.
+
+(;import lux
+         (lux/control (monoid #as m #refer #all)
+                      (functor #as F #refer #all)
+                      (monad #as M #refer #all)))
+
+## [Types]
+## (deftype (Maybe a)
+##   (| #;None
+##      (#;Some a)))
+
+## [Structures]
+(defstruct #export Maybe/Monoid (Monoid Maybe)
+  (def m;unit #;None)
+  (def (m;++ xs ys)
+    (case xs
+      #;None     ys
+      (#;Some x) (#;Some x))))
+
+(defstruct #export Maybe/Functor (Functor Maybe)
+  (def (F;map f ma)
+    (case ma
+      #;None     #;None
+      (#;Some a) (#;Some (f a)))))
+
+(defstruct #export Maybe/Monad (Monad Maybe)
+  (def M;_functor Maybe/Functor)
+
+  (def (M;wrap x)
+    (#;Some x))
+
+  (def (M;join mma)
+    (case mma
+      #;None      #;None
+      (#;Some xs) xs)))
diff --git a/input/lux/data/number.lux b/input/lux/data/number.lux
index 7941daa4e..8203d2ecd 100644
--- a/input/lux/data/number.lux
+++ b/input/lux/data/number.lux
@@ -6,38 +6,52 @@
 ##   the terms of this license.
 ##   You must not remove this notice, or any other, from this software.
 
-(;import lux)
+(;import lux
+         (lux/control (monoid #as m))
+         (lux/data (eq #as E)
+                   (ord #as O)
+                   (bounded #as B)))
 
 ## Signatures
 (defsig #export (Number n)
-  (: (-> n n n)
-     +)
+  (do-template [<name>]
+    [(: (-> n n n)
+        <name>)]
+    [+] [-] [*] [/] [%])
+  ## (: (-> n n n)
+  ##    +)
 
-  (: (-> n n n)
-     -)
+  ## (: (-> n n n)
+  ##    -)
 
-  (: (-> n n n)
-     *)
+  ## (: (-> n n n)
+  ##    *)
 
-  (: (-> n n n)
-     /)
+  ## (: (-> n n n)
+  ##    /)
 
-  (: (-> n n n)
-     %)
+  ## (: (-> n n n)
+  ##    %)
 
   (: (-> Int n)
      from-int)
 
-  (: (-> n n)
-     negate)
+  (do-template [<name>]
+    [(: (-> n n)
+        <name>)]
+    [negate] [signum] [abs])
+  ## (: (-> n n)
+  ##    negate)
 
-  (: (-> n n)
-     sign)
+  ## (: (-> n n)
+  ##    signum)
 
-  (: (-> n n)
-     abs))
+  ## (: (-> n n)
+  ##    abs)
+  )
 
-## Structures
+## [Structures]
+## Number
 (do-template [<name> <type> <+> <-> <*> </> <%> <=> <<> <from> <0> <1> <-1>]
   [(defstruct #export <name> (Number <type>)
      (def + <+>)
@@ -53,12 +67,42 @@
        (if (<<> x <0>)
          (<*> <-1> x)
          x))
-     (def (sign x)
+     (def (signum x)
        (cond (<=> x <0>) <0>
              (<<> x <0>) <-1>
              ## else
              <1>))
      )]
 
-  [Int:Number   Int  int:+  int:-  int:*  int:/  int:%  int:=  int:<       id 0   1   -1]
-  [Real:Number Real real:+ real:- real:* real:/ real:% real:= real:< _jvm_l2d 0.0 1.0 -1.0])
+  [ Int/Number  Int i+ i- i* i/ i% i= i<       id 0   1   -1]
+  [Real/Number Real r+ r- r* r/ r% r= r< _jvm_l2d 0.0 1.0 -1.0])
+
+## Eq
+(defstruct #export Int/Eq (E;Eq Int)
+  (def E;= i=))
+
+(defstruct #export Real/Eq (E;Eq Real)
+  (def E;= r=))
+
+## Ord
+(def #export Int/Ord (O;Ord Int)
+  (O;ord$ Int/Eq   i<  i>))
+
+(def #export Real/Ord (O;Ord Real)
+  (O;ord$ Real/Eq r< r>))
+
+## Monoid
+(do-template [<name> <type> <unit> <++>]
+  [(defstruct #export <name> (m;Monoid <type>)
+     (def m;unit <unit>)
+     (def m;++ <++>))]
+
+  [ IntAdd/Monoid  Int 0   i+]
+  [ IntMul/Monoid  Int 1   i*]
+  [RealAdd/Monoid Real 0.0 r+]
+  [RealMul/Monoid Real 1.0 r*]
+  [ IntMax/Monoid  Int (::  B;Int/Bounded B;bottom)  (O;max  Int/Ord)]
+  [ IntMin/Monoid  Int (::  B;Int/Bounded B;top)     (O;min  Int/Ord)]
+  [RealMax/Monoid Real (:: B;Real/Bounded B;bottom)  (O;max Real/Ord)]
+  [RealMin/Monoid Real (:: B;Real/Bounded B;top)     (O;min Real/Ord)]
+  )
diff --git a/input/lux/data/ord.lux b/input/lux/data/ord.lux
index 573106830..60a6cc0a8 100644
--- a/input/lux/data/ord.lux
+++ b/input/lux/data/ord.lux
@@ -27,15 +27,15 @@
   (All [a]
     (-> (E;Eq a) (-> a a Bool) (-> a a Bool) (Ord a)))
   (struct
-   (def _eq eq)
-   (def < <)
-   (def (<= x y)
-     (or (< x y)
-         (:: eq (E;= x y))))
-   (def > >)
-   (def (>= x y)
-     (or (> x y)
-         (:: eq (E;= x y))))))
+    (def _eq eq)
+    (def < <)
+    (def (<= x y)
+      (or (< x y)
+          (:: eq (E;= x y))))
+    (def > >)
+    (def (>= x y)
+      (or (> x y)
+          (:: eq (E;= x y))))))
 
 ## Functions
 (do-template [<name> <op>]
@@ -47,10 +47,3 @@
 
   [max ;;>]
   [min ;;<])
-
-## Structures
-(def #export Int:Ord (Ord Int)
-  (ord$ E;Int:Eq   int:<  int:>))
-
-(def #export Real:Ord (Ord Real)
-  (ord$ E;Real:Eq real:< real:>))
diff --git a/input/lux/data/reader.lux b/input/lux/data/reader.lux
new file mode 100644
index 000000000..c3bbc2830
--- /dev/null
+++ b/input/lux/data/reader.lux
@@ -0,0 +1,33 @@
+##   Copyright (c) Eduardo Julian. All rights reserved.
+##   The use and distribution terms for this software are covered by the
+##   Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
+##   which can be found in the file epl-v10.html at the root of this distribution.
+##   By using this software in any fashion, you are agreeing to be bound by
+##   the terms of this license.
+##   You must not remove this notice, or any other, from this software.
+
+(;import (lux #refer (#except Reader))
+         (lux/control (functor #as F #refer #all)
+                      (monad #as M #refer #all)))
+
+## [Types]
+(deftype #export (Reader r a)
+  (-> r a))
+
+## [Structures]
+(defstruct #export Reader/Functor (All [r]
+                                    (Functor (Reader r)))
+  (def (F;map f fa)
+    (lambda [env]
+      (f (fa env)))))
+
+(defstruct #export Reader/Monad (All [r]
+                                  (Monad (Reader r)))
+  (def M;_functor Reader/Functor)
+
+  (def (M;wrap x)
+    (lambda [env] x))
+
+  (def (M;join mma)
+    (lambda [env]
+      (mma env env))))
diff --git a/input/lux/data/show.lux b/input/lux/data/show.lux
index 3748d481a..e081b9239 100644
--- a/input/lux/data/show.lux
+++ b/input/lux/data/show.lux
@@ -19,9 +19,9 @@
      (def (show x)
        <body>))]
 
-  [Bool:Show Bool (_jvm_invokevirtual java.lang.Object toString [] x [])]
-  [Int:Show  Int  (_jvm_invokevirtual java.lang.Object toString [] x [])]
-  [Real:Show Real (_jvm_invokevirtual java.lang.Object toString [] x [])]
-  [Char:Show Char (let [char (_jvm_invokevirtual java.lang.Object toString [] x [])]
+  [Bool/Show Bool (_jvm_invokevirtual java.lang.Object toString [] x [])]
+  [ Int/Show  Int (_jvm_invokevirtual java.lang.Object toString [] x [])]
+  [Real/Show Real (_jvm_invokevirtual java.lang.Object toString [] x [])]
+  [Char/Show Char (let [char (_jvm_invokevirtual java.lang.Object toString [] x [])]
                     ($ text:++ "#\"" char "\""))]
-  [Text:Show Text x])
+  [Text/Show Text x])
diff --git a/input/lux/data/state.lux b/input/lux/data/state.lux
index 386c7be1d..bc9858a29 100644
--- a/input/lux/data/state.lux
+++ b/input/lux/data/state.lux
@@ -6,8 +6,30 @@
 ##   the terms of this license.
 ##   You must not remove this notice, or any other, from this software.
 
-(;import lux)
+(;import lux
+         (lux/control (functor #as F #refer #all)
+                      (monad #as M #refer #all)))
 
-## Types
+## [Types]
 (deftype #export (State s a)
   (-> s (, s a)))
+
+## [Structures]
+(defstruct #export State/Functor (Functor State)
+  (def (F;map f ma)
+    (lambda [state]
+      (let [[state' a] (ma state)]
+        [state' (f a)]))))
+
+(defstruct #export State/Monad (All [s]
+                                 (Monad (State s)))
+  (def M;_functor State/Functor)
+
+  (def (M;wrap x)
+    (lambda [state]
+      [state x]))
+
+  (def (M;join mma)
+    (lambda [state]
+      (let [[state' ma] (mma state)]
+        (ma state')))))
diff --git a/input/lux/data/text.lux b/input/lux/data/text.lux
index 1a8587f46..5f2203376 100644
--- a/input/lux/data/text.lux
+++ b/input/lux/data/text.lux
@@ -18,8 +18,8 @@
 
 (def #export (@ idx x)
   (-> Int Text (Maybe Char))
-  (if (and (int:< idx (size x))
-           (int:>= idx 0))
+  (if (and (i< idx (size x))
+           (i>= idx 0))
     (#;Some (_jvm_invokevirtual java.lang.String charAt [int]
                                 x [(_jvm_l2i idx)]))
     #;None))
@@ -46,9 +46,9 @@
 
 (def #export (sub' from to x)
   (-> Int Int Text (Maybe Text))
-  (if (and (int:< from to)
-           (int:>= from 0)
-           (int:<= to (size x)))
+  (if (and (i< from to)
+           (i>= from 0)
+           (i<= to (size x)))
     (_jvm_invokevirtual java.lang.String substring [int int]
                         x [(_jvm_l2i from) (_jvm_l2i to)])
     #;None))
@@ -59,8 +59,8 @@
 
 (def #export (split at x)
   (-> Int Text (Maybe (, Text Text)))
-  (if (and (int:< at (size x))
-           (int:>= at 0))
+  (if (and (i< at (size x))
+           (i>= at 0))
     (let [pre (_jvm_invokevirtual java.lang.String substring [int int]
                                   x [(_jvm_l2i 0) (_jvm_l2i at)])
           post (_jvm_invokevirtual java.lang.String substring [int]
@@ -76,8 +76,7 @@
 (do-template [<common> <general> <method>]
   [(def #export (<general> pattern from x)
      (-> Text Int Text (Maybe Int))
-     (if (and (int:< from (size x))
-              (int:>= from 0))
+     (if (and (i< from (size x)) (i>= from 0))
        (case (_jvm_i2l (_jvm_invokevirtual java.lang.String <method> [java.lang.String int]
                                            x [pattern (_jvm_l2i from)]))
          -1  #;None
@@ -108,32 +107,33 @@
   (-> Text Text Bool)
   (case (last-index-of postfix x)
     (#;Some n)
-    (int:= (int:+ n (size postfix))
-           (size x))
+    (i= (i+ n (size postfix))
+        (size x))
 
     _
     false))
 
-(defstruct #export Text:Eq (E;Eq Text)
+## [Structures]
+(defstruct #export Text/Eq (E;Eq Text)
   (def (E;= x y)
     (_jvm_invokevirtual java.lang.Object equals [java.lang.Object]
                         x [y])))
 
-(defstruct #export Text:Ord (O;Ord Text)
-  (def O;_eq Text:Eq)
+(defstruct #export Text/Ord (O;Ord Text)
+  (def O;_eq Text/Eq)
   (def (O;< x y)
-    (int:< (_jvm_i2l (_jvm_invokevirtual java.lang.String compareTo [java.lang.String]
-                                         x [y]))
-           0))
+    (i< (_jvm_i2l (_jvm_invokevirtual java.lang.String compareTo [java.lang.String]
+                                      x [y]))
+        0))
   (def (O;<= x y)
-    (int:<= (_jvm_i2l (_jvm_invokevirtual java.lang.String compareTo [java.lang.String]
-                                          x [y]))
-            0))
+    (i<= (_jvm_i2l (_jvm_invokevirtual java.lang.String compareTo [java.lang.String]
+                                       x [y]))
+         0))
   (def (O;> x y)
-    (int:> (_jvm_i2l (_jvm_invokevirtual java.lang.String compareTo [java.lang.String]
-                                         x [y]))
-           0))
+    (i> (_jvm_i2l (_jvm_invokevirtual java.lang.String compareTo [java.lang.String]
+                                      x [y]))
+        0))
   (def (O;>= x y)
-    (int:>= (_jvm_i2l (_jvm_invokevirtual java.lang.String compareTo [java.lang.String]
-                                          x [y]))
-            0)))
+    (i>= (_jvm_i2l (_jvm_invokevirtual java.lang.String compareTo [java.lang.String]
+                                       x [y]))
+         0)))
diff --git a/input/lux/data/writer.lux b/input/lux/data/writer.lux
new file mode 100644
index 000000000..f71492e35
--- /dev/null
+++ b/input/lux/data/writer.lux
@@ -0,0 +1,34 @@
+##   Copyright (c) Eduardo Julian. All rights reserved.
+##   The use and distribution terms for this software are covered by the
+##   Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
+##   which can be found in the file epl-v10.html at the root of this distribution.
+##   By using this software in any fashion, you are agreeing to be bound by
+##   the terms of this license.
+##   You must not remove this notice, or any other, from this software.
+
+(;import lux
+         (lux/control (monoid #as m #refer #all)
+                      (functor #as F #refer #all)
+                      (monad #as M #refer #all)))
+
+## [Types]
+(deftype #export (Writer l a)
+  (, l a))
+
+## [Structures]
+(defstruct #export Writer/Functor (All [l]
+                                    (Functor (Writer l)))
+  (def (F;map f fa)
+    (let [[log datum] fa]
+      [log (f datum)])))
+
+(defstruct #export (Writer/Monad mon) (All [l]
+                                        (-> (Monoid l) (Monad (Writer l))))
+  (def M;_functor Writer/Functor)
+
+  (def (M;wrap x)
+    [(:: mon m;unit) x])
+
+  (def (M;join mma)
+    (let [[log1 [log2 a]] mma]
+      [(:: mon (m;++ log1 log2)) a])))
diff --git a/input/lux/host/java.lux b/input/lux/host/java.lux
new file mode 100644
index 000000000..52391201d
--- /dev/null
+++ b/input/lux/host/java.lux
@@ -0,0 +1,311 @@
+##   Copyright (c) Eduardo Julian. All rights reserved.
+##   The use and distribution terms for this software are covered by the
+##   Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
+##   which can be found in the file epl-v10.html at the root of this distribution.
+##   By using this software in any fashion, you are agreeing to be bound by
+##   the terms of this license.
+##   You must not remove this notice, or any other, from this software.
+
+(;import lux
+         (lux (data list
+                    (text #as text))
+              (control (functor #as F)
+                       (monad #as M #refer (#only do)))
+              (meta lux
+                    macro
+                    syntax)))
+
+## (open List/Functor)
+
+## [Utils/Parsers]
+(def finally^
+  (Parser Syntax)
+  (form^ (do Parser/Monad
+           [_ (symbol?^ ["" "finally"])
+            expr id^
+            _ end^]
+           (M;wrap expr))))
+
+(def catch^
+  (Parser (, Text Ident Syntax))
+  (form^ (do Parser/Monad
+           [_ (symbol?^ ["" "catch"])
+            ex-class local-symbol^
+            ex symbol^
+            expr id^
+            _ end^]
+           (M;wrap [ex-class ex expr]))))
+
+(def method-decl^
+  (Parser (, (List Text) Text (List Text) Text))
+  (form^ (do Parser/Monad
+           [modifiers (*^ local-tag^)
+            name local-symbol^
+            inputs (tuple^ (*^ local-symbol^))
+            output local-symbol^
+            _ end^]
+           (M;wrap [modifiers name inputs output]))))
+
+(def field-decl^
+  (Parser (, (List Text) Text Text))
+  (form^ (do Parser/Monad
+           [modifiers (*^ local-tag^)
+            name local-symbol^
+            class local-symbol^
+            _ end^]
+           (M;wrap [modifiers name class]))))
+
+(def arg-decl^
+  (Parser (, Text Text))
+  (form^ (do Parser/Monad
+           [arg-name local-symbol^
+            arg-class local-symbol^
+            _ end^]
+           (M;wrap [arg-name arg-class]))))
+
+(def method-def^
+  (Parser (, (List Text) Text (List (, Text Text)) Text Syntax))
+  (form^ (do Parser/Monad
+           [modifiers (*^ local-tag^)
+            name local-symbol^
+            inputs (tuple^ (*^ arg-decl^))
+            output local-symbol^
+            body id^
+            _ end^]
+           (M;wrap [modifiers name inputs output body]))))
+
+(def method-call^
+  (Parser (, Text (List Text) (List Syntax)))
+  (form^ (do Parser/Monad
+           [method local-symbol^
+            arity-classes (tuple^ (*^ local-symbol^))
+            arity-args (tuple^ (*^ id^))
+            _ end^
+            _ (: (Parser (,))
+                 (if (i= (size arity-classes)
+                         (size arity-args))
+                   (M;wrap [])
+                   (lambda [_] #;None)))]
+           (M;wrap [method arity-classes arity-args])
+           )))
+
+## [Utils/Lux]
+## (def (find-class-field field class)
+##   (-> Text Text (Lux Type))
+##   ...)
+
+## (def (find-virtual-method method class)
+##   (-> Text Text (Lux (List (, (List Type) Type))))
+##   ...)
+
+## (def (find-static-method method class)
+##   (-> Text Text (Lux (List (, (List Type) Type))))
+##   ...)
+
+
+## [Syntax]
+(defsyntax #export (throw ex)
+  (emit (list (` (_jvm_throw (~ ex))))))
+
+(defsyntax #export (try body [catches (*^ catch^)] [finally (?^ finally^)])
+  (emit (list (` (_jvm_try (~ body)
+                           (~@ (list:++ (:: List/Functor (F;map (: (-> (, Text Ident Syntax) Syntax)
+                                                                   (lambda [catch]
+                                                                     (let [[class ex body] catch]
+                                                                       (` (_jvm_catch (~ (text$ class)) (~ (symbol$ ex)) (~ body))))))
+                                                                catches))
+                                        (case finally
+                                          #;None
+                                          (list)
+
+                                          (#;Some finally)
+                                          (list (` (_jvm_finally (~ finally))))))))))))
+
+(defsyntax #export (definterface [name local-symbol^] [supers (tuple^ (*^ local-symbol^))] [members (*^ method-decl^)])
+  (do Lux/Monad
+    [current-module get-module-name
+     #let [full-name (text;++ (text;replace "/" "." current-module)
+                              name)]]
+    (let [members' (:: List/Functor (F;map (: (-> (, (List Text) Text (List Text) Text) Syntax)
+                                              (lambda [member]
+                                                (let [[modifiers name inputs output] member]
+                                                  (` ((~ (symbol$ ["" name])) [(~@ (:: List/Functor (F;map text$ inputs)))] (~ (text$ output)) [(~@ (:: List/Functor (F;map text$ modifiers)))])))))
+                                           members))]
+      (emit (list (` (_jvm_interface (~ (text$ full-name)) [(~@ (:: List/Functor (F;map text$ supers)))]
+                       (~@ members'))))))))
+
+(defsyntax #export (defclass [name local-symbol^] [super local-symbol^] [interfaces (tuple^ (*^ local-symbol^))]
+                     [fields (*^ field-decl^)]
+                     [methods (*^ method-def^)])
+  (do Lux/Monad
+    [current-module get-module-name
+     #let [full-name (text;++ (text;replace "/" "." current-module)
+                              name)
+           fields' (:: List/Functor (F;map (: (-> (, (List Text) Text Text) Syntax)
+                                              (lambda [field]
+                                                (let [[modifiers name class] field]
+                                                  (` ((~ (symbol$ ["" name]))
+                                                      (~ (text$ class))
+                                                      [(~@ (:: List/Functor (F;map text$ modifiers)))])))))
+                                           fields))
+           methods' (:: List/Functor (F;map (: (-> (, (List Text) Text (List (, Text Text)) Text Syntax) Syntax)
+                                               (lambda [methods]
+                                                 (let [[modifiers name inputs output body] methods]
+                                                   (` ((~ (symbol$ ["" name]))
+                                                       [(~@ (:: List/Functor (F;map (: (-> (, Text Text) Syntax)
+                                                                                       (lambda [in]
+                                                                                         (let [[left right] in]
+                                                                                           (form$ (list (text$ left)
+                                                                                                        (text$ right))))))
+                                                                                    inputs)))]
+                                                       (~ (text$ output))
+                                                       [(~@ (:: List/Functor (F;map text$ modifiers)))]
+                                                       (~ body))))))
+                                            methods))]]
+    (emit (list (` (_jvm_class (~ (text$ full-name)) (~ (text$ super))
+                     [(~@ (:: List/Functor (F;map text$ interfaces)))]
+                     [(~@ fields')]
+                     [(~@ methods')]))))))
+
+(defsyntax #export (new [class local-symbol^] [arg-classes (tuple^ (*^ local-symbol^))] [args (tuple^ (*^ id^))])
+  (emit (list (` (_jvm_new (~ (text$ class))
+                           [(~@ (:: List/Functor (F;map text$ arg-classes)))]
+                           [(~@ args)])))))
+
+(defsyntax #export (instance? [class local-symbol^] obj)
+  (emit (list (` (_jvm_instanceof (~ (text$ class)) (~ obj))))))
+
+(defsyntax #export (locking lock body)
+  (do Lux/Monad
+    [g!lock (gensym "")
+     g!body (gensym "")]
+    (emit (list (` (;let [(~ g!lock) (~ lock)
+                          _ (_jvm_monitor-enter (~ g!lock))
+                          (~ g!body) (~ body)
+                          _ (_jvm_monitor-exit (~ g!lock))]
+                         (~ g!body)))))
+    ))
+
+(defsyntax #export (null? obj)
+  (emit (list (` (_jvm_null? (~ obj))))))
+
+(defsyntax #export (program [args symbol^] body)
+  (emit (list (` (_jvm_program (~ (symbol$ args))
+                   (~ body))))))
+
+## (defsyntax #export (.? [field local-symbol^] obj)
+##   (case obj
+##     (#;Meta [_ (#;SymbolS obj-name)])
+##     (do Lux/Monad
+##       [obj-type (find-var-type obj-name)]
+##       (case obj-type
+##         (#;DataT class)
+##         (do Lux/Monad
+##           [field-class (find-field field class)]
+##           (_jvm_getfield (~ (text$ class)) (~ (text$ field)) (~ (text$ field-class))))
+
+##         _
+##         (fail "Can only get field from object.")))
+
+##     _
+##     (do Lux/Monad
+##       [g!obj (gensym "")]
+##       (emit (list (` (;let [(~ g!obj) (~ obj)]
+##                            (.? (~ field) (~ g!obj)))))))))
+
+## (defsyntax #export (.= [field local-symbol^] value obj)
+##   (case obj
+##     (#;Meta [_ (#;SymbolS obj-name)])
+##     (do Lux/Monad
+##       [obj-type (find-var-type obj-name)]
+##       (case obj-type
+##         (#;DataT class)
+##         (do Lux/Monad
+##           [field-class (find-field field class)]
+##           (_jvm_putfield (~ (text$ class)) (~ (text$ field)) (~ (text$ field-class)) (~ value)))
+
+##         _
+##         (fail "Can only set field of object.")))
+
+##     _
+##     (do Lux/Monad
+##       [g!obj (gensym "")]
+##       (emit (list (` (;let [(~ g!obj) (~ obj)]
+##                            (.= (~ field) (~ value) (~ g!obj)))))))))
+
+## (defsyntax #export (.! [call method-call^] obj)
+##   (case obj
+##     (#;Meta [_ (#;SymbolS obj-name)])
+##     (do Lux/Monad
+##       [obj-type (find-var-type obj-name)]
+##       (case obj-type
+##         (#;DataT class)
+##         (do Lux/Monad
+##           [#let [[m-name ?m-classes m-args] call]
+##            all-m-details (find-virtual-method m-name class)
+##            m-ins (case [?m-classes all-m-details]
+##                    (\ [#;None (list [m-ins m-out])])
+##                    (M;wrap m-ins)
+
+##                    (\ [(#;Some m-ins) _])
+##                    (M;wrap m-ins)
+
+##                    _
+##                    #;None)]
+##           (emit (list (` (_jvm_invokevirtual (~ (text$ m-name)) (~ (text$ class)) [(~@ (:: List/Functor (F;map text$ m-ins)))]
+##                                              (~ obj) [(~@ m-args)])))))
+
+##         _
+##         (fail "Can only call method on object.")))
+
+##     _
+##     (do Lux/Monad
+##       [g!obj (gensym "")]
+##       (emit (list (` (;let [(~ g!obj) (~ obj)]
+##                            (.! (~@ *tokens*)))))))))
+
+## (defsyntax #export (..? [field local-symbol^] [class local-symbol^])
+##   (emit (list (` (_jvm_getstatic (~ (text$ class)) (~ (text$ field)))))))
+
+## (defsyntax #export (..= [field local-symbol^] value [class local-symbol^])
+##   (emit (list (` (_jvm_putstatic (~ (text$ class)) (~ (text$ field)) (~ value))))))
+
+## (defsyntax #export (..! [call method-call^] [class local-symbol^])
+##   (do Lux/Monad
+##     [#let [[m-name ?m-classes m-args] call]
+##      all-m-details (find-static-method m-name class)
+##      m-ins (case [?m-classes all-m-details]
+##              (\ [#;None (list [m-ins m-out])])
+##              (M;wrap m-ins)
+
+##              (\ [(#;Some m-ins) _])
+##              (M;wrap m-ins)
+
+##              _
+##              #;None)]
+##     (emit (list (` (_jvm_invokestatic (~ (text$ m-name)) (~ (text$ class))
+##                                       [(~@ (:: List/Functor (F;map text$ m-ins)))]
+##                                       [(~@ m-args)]))))
+##     ))
+
+## (definterface Function []
+##   (#public #abstract apply [java.lang.Object] java.lang.Object))
+
+## (_jvm_interface "Function" []
+##   (apply ["java.lang.Object"] "java.lang.Object" ["public" "abstract"]))
+
+## (defclass MyFunction [Function]
+##   (#public #static foo java.lang.Object)
+##   (#public <init> [] void
+##            (_jvm_invokespecial java.lang.Object <init> [] this []))
+##   (#public apply [(arg java.lang.Object)] java.lang.Object
+##            "YOLO"))
+
+## (_jvm_class "lux.MyFunction" "java.lang.Object" ["lux.Function"]
+##   [(foo "java.lang.Object" ["public" "static"])]
+##   (<init> [] "void"
+##           ["public"]
+##           (_jvm_invokespecial java.lang.Object <init> [] this []))
+##   (apply [(arg "java.lang.Object")] "java.lang.Object"
+##          ["public"]
+##          "YOLO"))
diff --git a/input/lux/math.lux b/input/lux/math.lux
new file mode 100644
index 000000000..2e29c5da7
--- /dev/null
+++ b/input/lux/math.lux
@@ -0,0 +1,60 @@
+##   Copyright (c) Eduardo Julian. All rights reserved.
+##   The use and distribution terms for this software are covered by the
+##   Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
+##   which can be found in the file epl-v10.html at the root of this distribution.
+##   By using this software in any fashion, you are agreeing to be bound by
+##   the terms of this license.
+##   You must not remove this notice, or any other, from this software.
+
+(;import lux)
+
+## [Constants]
+(do-template [<name> <value>]
+  [(def #export <name>
+     Real
+     (_jvm_getstatic java.lang.Math <value>))]
+
+  [e  E]
+  [pi PI]
+  )
+
+## [Functions]
+(do-template [<name> <method>]
+  [(def #export (<name> n)
+     (-> Real Real)
+     (_jvm_invokestatic java.lang.Math <method> [double] [n]))]
+
+  [cos cos]
+  [sin sin]
+  [tan tan]
+
+  [acos acos]
+  [asin asin]
+  [atan atan]
+  
+  [cosh cosh]
+  [sinh sinh]
+  [tanh tanh]
+
+  [ceil ceil]
+  [floor floor]
+  [round round]
+
+  [exp exp]
+  [log log]
+  
+  [cbrt cbrt]
+  [sqrt sqrt]
+
+  [->degrees toDegrees]
+  [->radians toRadians]
+  )
+
+(do-template [<name> <method>]
+  [(def #export (<name> x y)
+     (-> Real Real Real)
+     (_jvm_invokestatic java.lang.Math <method> [double double] [x y]))]
+
+  [atan2 atan2]
+  [pow pow]
+  )
diff --git a/input/lux/meta/lux.lux b/input/lux/meta/lux.lux
index bd4fab8b6..1fc739403 100644
--- a/input/lux/meta/lux.lux
+++ b/input/lux/meta/lux.lux
@@ -8,18 +8,25 @@
 
 (;import lux
          (.. macro)
-         (lux/control (monoid #as m #refer (#only List:Monoid))
+         (lux/control (monoid #as m)
                       (functor #as F)
                       (monad #as M #refer (#only do)))
          (lux/data list
+                   maybe
                    (show #as S)))
 
-## Types
+## [Types]
 ## (deftype (Lux a)
 ##   (-> Compiler (Either Text (, Compiler a))))
 
-## Structures
-(defstruct #export Lux:Functor (F;Functor Lux)
+## [Utils]
+(def (ident->text ident)
+  (-> Ident Text)
+  (let [[pre post] ident]
+    ($ text:++ pre ";" post)))
+
+## [Structures]
+(defstruct #export Lux/Functor (F;Functor Lux)
   (def (F;map f fa)
     (lambda [state]
       (case (fa state)
@@ -29,8 +36,8 @@
         (#;Right [state' a])
         (#;Right [state' (f a)])))))
 
-(defstruct #export Lux:Monad (M;Monad Lux)
-  (def M;_functor Lux:Functor)
+(defstruct #export Lux/Monad (M;Monad Lux)
+  (def M;_functor Lux/Functor)
   (def (M;wrap x)
     (lambda [state]
       (#;Right [state x])))
@@ -68,7 +75,7 @@
 (def (find-macro' modules current-module module name)
   (-> (List (, Text (Module Compiler))) Text Text Text
       (Maybe Macro))
-  (do M;Maybe:Monad
+  (do Maybe/Monad
     [$module (get module modules)
      gdef (|> (: (Module Compiler) $module) (get@ #;defs) (get name))]
     (case (: (, Bool (DefData' Macro)) gdef)
@@ -85,7 +92,7 @@
 
 (def #export (find-macro ident)
   (-> Ident (Lux (Maybe Macro)))
-  (do Lux:Monad
+  (do Lux/Monad
     [current-module get-module-name]
     (let [[module name] ident]
       (: (Lux (Maybe Macro))
@@ -96,50 +103,56 @@
   (-> Ident (Lux Ident))
   (case ident
     ["" name]
-    (do Lux:Monad
+    (do Lux/Monad
       [module-name get-module-name]
       (M;wrap (: Ident [module-name name])))
 
     _
-    (:: Lux:Monad (M;wrap ident))))
+    (:: Lux/Monad (M;wrap ident))))
 
 (def #export (macro-expand syntax)
   (-> Syntax (Lux (List Syntax)))
   (case syntax
     (#;Meta [_ (#;FormS (#;Cons [(#;Meta [_ (#;SymbolS macro-name)]) args]))])
-    (do Lux:Monad
+    (do Lux/Monad
       [macro-name' (normalize macro-name)
        ?macro (find-macro macro-name')]
       (case ?macro
         (#;Some macro)
-        (do Lux:Monad
+        (do Lux/Monad
           [expansion (macro args)
-           expansion' (M;map% Lux:Monad macro-expand expansion)]
-          (M;wrap (:: M;List:Monad (M;join expansion'))))
+           expansion' (M;map% Lux/Monad macro-expand expansion)]
+          (M;wrap (:: List/Monad (M;join expansion'))))
         
         #;None
-        (do Lux:Monad
-          [parts' (M;map% Lux:Monad macro-expand (list& (symbol$ macro-name) args))]
-          (M;wrap (list (form$ (:: M;List:Monad (M;join parts'))))))))
+        (do Lux/Monad
+          [parts' (M;map% Lux/Monad macro-expand (list& (symbol$ macro-name) args))]
+          (M;wrap (list (form$ (:: List/Monad (M;join parts'))))))))
 
     (#;Meta [_ (#;FormS (#;Cons [harg targs]))])
-    (do Lux:Monad
+    (do Lux/Monad
       [harg+ (macro-expand harg)
-       targs+ (M;map% Lux:Monad macro-expand targs)]
-      (M;wrap (list (form$ (list:++ harg+ (:: M;List:Monad (M;join (: (List (List Syntax)) targs+))))))))
+       targs+ (M;map% Lux/Monad macro-expand targs)]
+      (M;wrap (list (form$ (list:++ harg+ (:: List/Monad (M;join (: (List (List Syntax)) targs+))))))))
 
     (#;Meta [_ (#;TupleS members)])
-    (do Lux:Monad
-      [members' (M;map% Lux:Monad macro-expand members)]
-      (M;wrap (list (tuple$ (:: M;List:Monad (M;join members'))))))
+    (do Lux/Monad
+      [members' (M;map% Lux/Monad macro-expand members)]
+      (M;wrap (list (tuple$ (:: List/Monad (M;join members'))))))
 
     _
-    (:: Lux:Monad (M;wrap (list syntax)))))
+    (:: Lux/Monad (M;wrap (list syntax)))))
 
 (def #export (gensym prefix state)
   (-> Text (Lux Syntax))
   (#;Right [(update@ #;seed inc state)
-            (symbol$ ["__gensym__" (:: S;Int:Show (S;show (get@ #;seed state)))])]))
+            (symbol$ ["__gensym__" (:: S;Int/Show (S;show (get@ #;seed state)))])]))
+
+(def #export (emit datum)
+  (All [a]
+    (-> a (Lux a)))
+  (lambda [state]
+    (#;Right [state datum])))
 
 (def #export (fail msg)
   (All [a]
@@ -149,7 +162,7 @@
 
 (def #export (macro-expand-1 token)
   (-> Syntax (Lux Syntax))
-  (do Lux:Monad
+  (do Lux/Monad
     [token+ (macro-expand token)]
     (case token+
       (\ (list token'))
@@ -171,7 +184,7 @@
   (-> Text (Lux (List Text)))
   (case (get module (get@ #;modules state))
     (#;Some =module)
-    (using M;List:Monad
+    (using List/Monad
       (#;Right [state (M;join (:: M;_functor (F;map (: (-> (, Text (, Bool (DefData' Macro)))
                                                            (List Text))
                                                        (lambda [gdef]
@@ -183,3 +196,91 @@
     
     #;None
     (#;Left ($ text:++ "Unknown module: " module))))
+
+(def (show-envs envs)
+  (-> (List (Env Text (, LuxVar Type))) Text)
+  (|> envs
+      (F;map (lambda [env]
+               (case env
+                 {#;name name #;inner-closures _ #;locals {#;counter _ #;mappings locals} #;closure _}
+                 ($ text:++ name ": " (|> locals
+                                          (F;map (: (All [a] (-> (, Text a) Text))
+                                                    (lambda [b] (let [[label _] b] label))))
+                                          (:: List/Functor)
+                                          (interpose " ")
+                                          (foldL text:++ ""))))))
+      (:: List/Functor)
+      (interpose "\n")
+      (foldL text:++ "")))
+
+(def (try-both f x1 x2)
+  (All [a b]
+    (-> (-> a (Maybe b)) a a (Maybe b)))
+  (case (f x1)
+    #;None     (f x2)
+    (#;Some y) (#;Some y)))
+
+(def (find-in-env name state)
+  (-> Ident Compiler (Maybe Type))
+  (let [vname' (ident->text name)]
+    (case state
+      {#;source source #;modules modules
+       #;envs   envs   #;types   types             #;host  host
+       #;seed   seed   #;seen-sources seen-sources #;eval? eval?}
+      (some (: (-> (Env Text (, LuxVar Type)) (Maybe Type))
+               (lambda [env]
+                 (case env
+                   {#;name _ #;inner-closures _ #;locals {#;counter _ #;mappings locals} #;closure {#;counter _ #;mappings closure}}
+                   (try-both (some (: (-> (, Text (, LuxVar Type)) (Maybe Type))
+                                      (lambda [binding]
+                                        (let [[bname [_ type]] binding]
+                                          (if (text:= vname' bname)
+                                            (#;Some type)
+                                            #;None)))))
+                             locals
+                             closure))))
+            envs))))
+
+(def (find-in-defs name state)
+  (-> Ident Compiler (Maybe Type))
+  (let [[v-prefix v-name] name
+        {#;source source #;modules modules
+         #;envs   envs   #;types   types   #;host           host
+         #;seed   seed   #;seen-sources seen-sources #;eval? eval?} state]
+    (case (get v-prefix modules)
+      #;None
+      #;None
+
+      (#;Some {#;defs defs #;module-aliases _ #;imports _})
+      (case (get v-name defs)
+        #;None
+        #;None
+
+        (#;Some [_ def-data])
+        (case def-data
+          #;TypeD          (#;Some Type)
+          (#;ValueD type)  (#;Some type)
+          (#;MacroD m)     (#;Some Macro)
+          (#;AliasD name') (find-in-defs name' state))))))
+
+(def #export (find-var-type name)
+  (-> Ident (Lux Type))
+  (do Lux/Monad
+    [name' (normalize name)]
+    (: (Lux Type)
+       (lambda [state]
+         (case (find-in-env name state)
+           (#;Some struct-type)
+           (#;Right [state struct-type])
+
+           _
+           (case (find-in-defs name' state)
+             (#;Some struct-type)
+             (#;Right [state struct-type])
+
+             _
+             (let [{#;source source #;modules      modules
+                    #;envs   envs   #;types        types        #;host  host
+                    #;seed   seed   #;seen-sources seen-sources #;eval? eval?} state]
+               (#;Left ($ text:++ "Unknown var: " (ident->text name) "\n\n" (show-envs envs))))))))
+    ))
diff --git a/input/lux/meta/syntax.lux b/input/lux/meta/syntax.lux
index cf08ff0eb..3c9a9ce2e 100644
--- a/input/lux/meta/syntax.lux
+++ b/input/lux/meta/syntax.lux
@@ -8,7 +8,7 @@
 
 (;import lux
          (.. (macro #as m #refer #all)
-             lux)
+             (lux #as l #refer (#only Lux/Monad gensym)))
          (lux (control (functor #as F)
                        (monad #as M #refer (#only do)))
               (data list)))
@@ -19,12 +19,18 @@
   (let [[x y] xy]
     x))
 
+(def (join-pairs pairs)
+  (All [a] (-> (List (, a a)) (List a)))
+  (case pairs
+    #;Nil                   #;Nil
+    (#;Cons [[x y] pairs']) (list& x y (join-pairs pairs'))))
+
 ## Types
 (deftype #export (Parser a)
   (-> (List Syntax) (Maybe (, (List Syntax) a))))
 
 ## Structures
-(defstruct #export Parser:Functor (F;Functor Parser)
+(defstruct #export Parser/Functor (F;Functor Parser)
   (def (F;map f ma)
     (lambda [tokens]
       (case (ma tokens)
@@ -34,8 +40,8 @@
         (#;Some [tokens' a])
         (#;Some [tokens' (f a)])))))
 
-(defstruct #export Parser:Monad (M;Monad Parser)
-  (def M;_functor Parser:Functor)
+(defstruct #export Parser/Monad (M;Monad Parser)
+  (def M;_functor Parser/Functor)
 
   (def (M;wrap x tokens)
     (#;Some [tokens x]))
@@ -75,6 +81,20 @@
   [   tag^ Ident #;TagS]
   )
 
+(do-template [<name> <tag>]
+  [(def #export (<name> tokens)
+     (Parser Text)
+     (case tokens
+       (#;Cons [(#;Meta [_ (<tag> ["" x])]) tokens'])
+       (#;Some [tokens' x])
+
+       _
+       #;None))]
+
+  [local-symbol^ #;SymbolS]
+  [   local-tag^ #;TagS]
+  )
+
 (def (bool:= x y)
   (-> Bool Bool Bool)
   (if x
@@ -101,8 +121,8 @@
        #;None))]
 
   [  bool?^ Bool    #;BoolS  bool:=]
-  [   int?^ Int      #;IntS   int:=]
-  [  real?^ Real    #;RealS  real:=]
+  [   int?^ Int      #;IntS  i=]
+  [  real?^ Real    #;RealS  r=]
   ## [  char?^ Char    #;CharS  char:=]
   [  text?^ Text    #;TextS  text:=]
   [symbol?^ Ident #;SymbolS ident:=]
@@ -143,7 +163,7 @@
     (-> (Parser a) (Parser (List a))))
   (case (p tokens)
     #;None               (#;Some [tokens (list)])
-    (#;Some [tokens' x]) (run-parser (do Parser:Monad
+    (#;Some [tokens' x]) (run-parser (do Parser/Monad
                                        [xs (*^ p)]
                                        (M;wrap (list& x xs)))
                                      tokens')))
@@ -151,7 +171,7 @@
 (def #export (+^ p)
   (All [a]
     (-> (Parser a) (Parser (List a))))
-  (do Parser:Monad
+  (do Parser/Monad
     [x p
      xs (*^ p)]
     (M;wrap (list& x xs))))
@@ -159,7 +179,7 @@
 (def #export (&^ p1 p2)
   (All [a b]
     (-> (Parser a) (Parser b) (Parser (, a b))))
-  (do Parser:Monad
+  (do Parser/Monad
     [x1 p1
      x2 p2]
     (M;wrap [x1 x2])))
@@ -169,7 +189,7 @@
     (-> (Parser a) (Parser b) (Parser (Either b))))
   (case (p1 tokens)
     (#;Some [tokens' x1]) (#;Some [tokens' (#;Left x1)])
-    #;None                (run-parser (do Parser:Monad
+    #;None                (run-parser (do Parser/Monad
                                         [x2 p2]
                                         (M;wrap (#;Right x2)))
                                       tokens)))
@@ -192,46 +212,53 @@
 
 ## Syntax
 (defmacro #export (defsyntax tokens)
-  (case tokens
-    (\ (list (#;Meta [_ (#;FormS (list& (#;Meta [_ (#;SymbolS ["" name])]) args))])
-             body))
-    (do Lux:Monad
-      [names+parsers (M;map% Lux:Monad
-                             (: (-> Syntax (Lux (, Syntax Syntax)))
-                                (lambda [arg]
-                                  (case arg
-                                    (\ (#;Meta [_ (#;TupleS (list (#;Meta [_ (#;SymbolS var-name)])
-                                                                  parser))]))
-                                    (M;wrap [(symbol$ var-name) parser])
-
-                                    _
-                                    (fail "Syntax pattern expects 2-tuples."))))
-                             args)
-       g!tokens (gensym "tokens")
-       #let [names (:: F;List:Functor (F;map first names+parsers))
-             error-msg (text$ (text:++ "Wrong syntax for " name))
-             parsing (foldL (: (-> Syntax (, Syntax Syntax) Syntax)
+  (let [[exported? tokens] (: (, Bool (List Syntax))
+                              (case tokens
+                                (\ (list& (#;Meta [_ (#;TagS ["" "export"])]) tokens'))
+                                [true tokens']
+
+                                _
+                                [false tokens]))]
+    (case tokens
+      (\ (list (#;Meta [_ (#;FormS (list& (#;Meta [_ (#;SymbolS ["" name])]) args))])
+               body))
+      (do Lux/Monad
+        [names+parsers (M;map% Lux/Monad
+                               (: (-> Syntax (Lux (, Syntax Syntax)))
+                                  (lambda [arg]
+                                    (case arg
+                                      (\ (#;Meta [_ (#;TupleS (list (#;Meta [_ (#;SymbolS var-name)])
+                                                                    parser))]))
+                                      (M;wrap [(symbol$ var-name) parser])
+
+                                      (\ (#;Meta [_ (#;SymbolS var-name)]))
+                                      (M;wrap [(symbol$ var-name) (` id^)])
+
+                                      _
+                                      (l;fail "Syntax pattern expects 2-tuples or symbols."))))
+                               args)
+         g!tokens (gensym "tokens")
+         g!_ (gensym "_")
+         #let [names (:: List/Functor (F;map first names+parsers))
+               error-msg (text$ (text:++ "Wrong syntax for " name))
+               body' (foldL (: (-> Syntax (, Syntax Syntax) Syntax)
                                (lambda [body name+parser]
                                  (let [[name parser] name+parser]
                                    (` (_lux_case ((~ parser) (~ g!tokens))
                                         (#;Some [(~ g!tokens) (~ name)])
                                         (~ body)
 
-                                        _
-                                        #;None)))))
-                            (: Syntax (` (#;Some [(~@ names)])))
+                                        (~ g!_)
+                                        (l;fail (~ error-msg)))))))
+                            body
                             (reverse names+parsers))
-             body' (: Syntax
-                      (` (_lux_case (~ parsing)
-                           (#;Some [#;Nil [(~@ names)]])
-                           (~ body)
-
-                           _
-                           (l;fail (~ (text$ (text:++ "Wrong syntax for " name)))))))
-             macro-def (: Syntax
-                          (` (m/defmacro ((~ (symbol$ ["" name])) (~ g!tokens))
-                               (~ body'))))]]
-      (M;wrap (list macro-def)))
-    
-    _
-    (fail "Wrong syntax for defsyntax")))
+               macro-def (: Syntax
+                            (` (m;defmacro ((~ (symbol$ ["" name])) (~ g!tokens))
+                                           (~ body'))))]]
+        (M;wrap (list& macro-def
+                       (if exported?
+                         (list (` (_lux_export (~ (symbol$ ["" name])))))
+                         (list)))))
+      
+      _
+      (l;fail "Wrong syntax for defsyntax"))))
diff --git a/input/program.lux b/input/program.lux
index 6495854c1..19ee964e2 100644
--- a/input/program.lux
+++ b/input/program.lux
@@ -1,25 +1,35 @@
 (;import lux
-         (lux (control monoid
+         (lux (codata (stream #as S))
+              (control monoid
                        functor
                        monad
                        lazy
                        comonad)
-              (data eq
-                    bounded
-                    ord
+              (data bounded
+                    ## cont
+                    dict
+                    (either #as e)
+                    eq
+                    error
+                    id
                     io
                     list
-                    state
+                    maybe
                     number
+                    ord
+                    (reader #as r)
+                    show
+                    state
                     (text #as t)
-                    dict
-                    show)
-              (codata (stream #refer (#except iterate)))
+                    writer)
+              (host java)
               (meta lux
                     macro
-                    syntax)))
+                    syntax)
+              math
+              ))
 
-(_jvm_program args
+(program args
   (case args
     #;Nil
     (println "Hello, world!")