- Added parallel compilation.

- Added aliasing.
- Several bug fixes.
- Some minor refactoring.

16 files changed, 246 insertions, 199 deletions

diff --git a/stdlib/source/lux/concurrency/actor.lux b/stdlib/source/lux/concurrency/actor.lux
index bdf0758c3..848350499 100644
--- a/stdlib/source/lux/concurrency/actor.lux
+++ b/stdlib/source/lux/concurrency/actor.lux
@@ -152,8 +152,7 @@
    (def: #hidden (<resolve> name)
      (-> Ident (Meta Ident))
      (do Monad<Meta>
-       [name (macro;normalize name)
-        [_ annotations _] (macro;find-def name)]
+       [[_ annotations _] (macro;find-def name)]
        (case (macro;get-tag-ann (ident-for <tag>) annotations)
          (#;Some actor-name)
          (wrap actor-name)
diff --git a/stdlib/source/lux/concurrency/atom.lux b/stdlib/source/lux/concurrency/atom.lux
index 1260c758f..2837d6177 100644
--- a/stdlib/source/lux/concurrency/atom.lux
+++ b/stdlib/source/lux/concurrency/atom.lux
@@ -11,7 +11,7 @@
   (All [a] (-> a (Atom a)))
   ("lux atom new" value))
 
-(def: #export (get atom)
+(def: #export (read atom)
   (All [a] (-> (Atom a) (IO a)))
   (io ("lux atom get" atom)))
 
@@ -34,6 +34,6 @@
           []
           (io;run (update f atom))))))
 
-(def: #export (set value atom)
+(def: #export (write value atom)
   (All [a] (-> a (Atom a) (IO Unit)))
   (update (function;const value) atom))
diff --git a/stdlib/source/lux/concurrency/promise.lux b/stdlib/source/lux/concurrency/promise.lux
index 115f60dc1..78cdbecce 100644
--- a/stdlib/source/lux/concurrency/promise.lux
+++ b/stdlib/source/lux/concurrency/promise.lux
@@ -40,7 +40,7 @@
 (def: #export (poll promise)
   {#;doc "Polls a Promise's value."}
   (All [a] (-> (Promise a) (Maybe a)))
-  (|> (atom;get promise)
+  (|> (atom;read promise)
       io;run
       (get@ #value)))
 
@@ -58,7 +58,7 @@
   {#;doc "Sets an Promise's value if it has not been done yet."}
   (All [a] (-> a (Promise a) (IO Bool)))
   (do Monad<IO>
-    [old (atom;get promise)]
+    [old (atom;read promise)]
     (case (get@ #value old)
       (#;Some _)
       (wrap false)
@@ -76,7 +76,7 @@
 
 (def: (await f promise)
   (All [a] (-> (-> a (IO Unit)) (Promise a) Unit))
-  (let [old (io;run (atom;get promise))]
+  (let [old (io;run (atom;read promise))]
     (case (get@ #value old)
       (#;Some value)
       (io;run (f value))
diff --git a/stdlib/source/lux/concurrency/stm.lux b/stdlib/source/lux/concurrency/stm.lux
index 7886dda36..1fee00b7e 100644
--- a/stdlib/source/lux/concurrency/stm.lux
+++ b/stdlib/source/lux/concurrency/stm.lux
@@ -1,23 +1,22 @@
 (;module:
   lux
-  (lux (control ["F" functor]
-                ["A" applicative]
-                ["M" monad #+ do Monad])
+  (lux (control [functor #+ Functor]
+                [applicative #+ Applicative]
+                [monad #+ do Monad])
        [io #- run]
-       (data (coll [list "L/" Functor<List> Fold<List>]
-                   [dict #+ Dict]
-                   ["Q" queue])
+       (data (coll [list "list/" Functor<List> Fold<List>]
+                   [dict #+ Dict])
              [product]
              [text]
              maybe
-             [number "Nat/" Codec<Text,Nat>]
+             [number "nat/" Codec<Text,Nat>]
              text/format)
        [macro]
        (macro [code]
               ["s" syntax #+ syntax: Syntax])
        (concurrency [atom #+ Atom atom]
                     ["P" promise]
-                    [frp])
+                    [frp "frp/" Functor<Channel>])
        ))
 
 (type: (Var-State a)
@@ -48,7 +47,7 @@
 
 (def: raw-read
   (All [a] (-> (Var a) a))
-  (|>. atom;get io;run (get@ #value)))
+  (|>. atom;read io;run (get@ #value)))
 
 (def: (find-var-value var tx)
   (All [a] (-> (Var a) Tx (Maybe a)))
@@ -76,7 +75,7 @@
   {#;doc "Reads var immediately, without going through a transaction."}
   (All [a] (-> (Var a) (IO a)))
   (|> var
-      atom;get
+      atom;read
       (:: Functor<IO> map (get@ #value))))
 
 (def: (update-tx-value var value tx)
@@ -112,7 +111,7 @@
   {#;doc "Writes value to var immediately, without going through a transaction."}
   (All [a] (-> a (Var a) (IO Unit)))
   (do Monad<IO>
-    [old (atom;get var)
+    [old (atom;read var)
      #let [old-value (get@ #value old)
            new (set@ #value new-value old)]
      succeeded? (atom;compare-and-swap old new var)]
@@ -121,7 +120,7 @@
         [_ (|> old
                (get@ #observers)
                dict;values
-               (M;map @ (function [f] (f new-value))))]
+               (monad;map @ (function [f] (f new-value))))]
         (wrap []))
       (write! new-value var))))
 
@@ -143,26 +142,26 @@
                      (write! tail' channel-var)))]
     (do Monad<IO>
       [_ (atom;update (function [[value observers]]
-                        (let [label (Nat/encode (L/fold (function [key base]
-                                                          (case (Nat/decode key)
-                                                            (#;Left _)
-                                                            base
-
-                                                            (#;Right key-num)
-                                                            (n.max key-num base)))
-                                                        +0
-                                                        (dict;keys observers)))]
+                        (let [label (nat/encode (list/fold (function [key base]
+                                                             (case (nat/decode key)
+                                                               (#;Left _)
+                                                               base
+
+                                                               (#;Right key-num)
+                                                               (n.max key-num base)))
+                                                           +0
+                                                           (dict;keys observers)))]
                           [value (dict;put label (observer label) observers)]))
                       target)]
       (wrap head))))
 
-(struct: #export _ (F;Functor STM)
+(struct: #export _ (Functor STM)
   (def: (map f fa)
     (function [tx]
       (let [[tx' a] (fa tx)]
         [tx' (f a)]))))
 
-(struct: #export _ (A;Applicative STM)
+(struct: #export _ (Applicative STM)
   (def: functor Functor<STM>)
 
   (def: (wrap a)
@@ -186,7 +185,7 @@
   {#;doc "Will update a Var's value, and return a tuple with the old and the new values."}
   (All [a] (-> (-> a a) (Var a) (IO [a a])))
   (io (loop [_ []]
-        (let [(^@ state [value observers]) (io;run (atom;get var))
+        (let [(^@ state [value observers]) (io;run (atom;read var))
               value' (f value)]
           (if (io;run (atom;compare-and-swap state
                                              [value' observers]
@@ -225,31 +224,18 @@
   (Atom Bool)
   (atom false))
 
-(def: (process-commit commits)
-  (-> (frp;Channel [(STM Unit) (P;Promise Unit)])
-      (P;Promise Unit))
-  (do P;Monad<Promise>
-    [?head+tail commits]
-    (case ?head+tail
-      (#;Cons [stm-proc output] tail)
-      (do @
-        [#let [[finished-tx value] (stm-proc fresh-tx)]]
-        (exec (if (can-commit? finished-tx)
-                (exec (L/map commit-var finished-tx)
-                  (io;run (P;resolve value output))
-                  [])
-                (exec (io;run (write! [stm-proc output] pending-commits))
-                  []))
-          (process-commit tail)))
-
-      #;Nil
-      (undefined)
-      )))
+(def: (process-commit [stm-proc output])
+  (-> [(STM Unit) (P;Promise Unit)] Top)
+  (let [[finished-tx value] (stm-proc fresh-tx)]
+    (if (can-commit? finished-tx)
+      (exec (list/map commit-var finished-tx)
+        (io;run (P;resolve value output)))
+      (io;run (write! [stm-proc output] pending-commits)))))
 
 (def: init-processor!
   (IO Unit)
   (do Monad<IO>
-    [flag (atom;get commit-processor-flag)]
+    [flag (atom;read commit-processor-flag)]
     (if flag
       (wrap [])
       (do @
@@ -257,8 +243,9 @@
         (if was-first?
           (do Monad<IO>
             [inputs (follow pending-commits)]
-            (exec (process-commit (:! (frp;Channel [(STM Unit) (P;Promise Unit)])
-                                      inputs))
+            (exec (|> inputs
+                      (:! (frp;Channel [(STM Unit) (P;Promise Unit)]))
+                      (frp/map process-commit))
               (wrap [])))
           (wrap [])))
       )))
diff --git a/stdlib/source/lux/control/eq.lux b/stdlib/source/lux/control/eq.lux
index b69292daa..9e372bd58 100644
--- a/stdlib/source/lux/control/eq.lux
+++ b/stdlib/source/lux/control/eq.lux
@@ -5,13 +5,13 @@
   (: (-> a a Bool)
      =))
 
-(def: #export (seq left right)
+(def: #export (pair left right)
   (All [l r] (-> (Eq l) (Eq r) (Eq [l r])))
   (struct (def: (= [a b] [x y])
             (and (:: left = a x)
                  (:: right = b y)))))
 
-(def: #export (alt left right)
+(def: #export (either left right)
   (All [l r] (-> (Eq l) (Eq r) (Eq (| l r))))
   (struct (def: (= a|b x|y)
             (case [a|b x|y]
diff --git a/stdlib/source/lux/data/lazy.lux b/stdlib/source/lux/data/lazy.lux
index e344c6a0a..86fdde4a4 100644
--- a/stdlib/source/lux/data/lazy.lux
+++ b/stdlib/source/lux/data/lazy.lux
@@ -1,10 +1,10 @@
 (;module:
   lux
   (lux [io]
-       (control ["F" functor]
-                ["A" applicative]
-                monad)
-       (concurrency ["a" atom])
+       (control [functor #+ Functor]
+                [applicative #+ Applicative]
+                [monad #+ Monad do])
+       (concurrency [atom])
        [macro]
        (macro ["s" syntax #+ syntax:])
        (type opaque)))
@@ -14,15 +14,15 @@
 
   (def: #hidden (freeze' generator)
     (All [a] (-> (-> [] a) (Lazy a)))
-    (let [cache (a;atom (: (Maybe ($ +0)) #;None))]
+    (let [cache (atom;atom (: (Maybe ($ +0)) #;None))]
       (@opaque (function [_]
-                 (case (io;run (a;get cache))
+                 (case (io;run (atom;read cache))
                    (#;Some value)
                    value
 
                    _
                    (let [value (generator [])]
-                     (exec (io;run (a;compare-and-swap _ (#;Some value) cache))
+                     (exec (io;run (atom;compare-and-swap _ (#;Some value) cache))
                        value)))))))
 
   (def: #export (thaw l-value)
@@ -34,11 +34,11 @@
     [g!_ (macro;gensym "_")]
     (wrap (list (` (freeze' (function [(~ g!_)] (~ expr))))))))
 
-(struct: #export _ (F;Functor Lazy)
+(struct: #export _ (Functor Lazy)
   (def: (map f fa)
     (freeze (f (thaw fa)))))
 
-(struct: #export _ (A;Applicative Lazy)
+(struct: #export _ (Applicative Lazy)
   (def: functor Functor<Lazy>)
 
   (def: (wrap a)
diff --git a/stdlib/source/lux/host.jvm.lux b/stdlib/source/lux/host.jvm.lux
index 1298a56d1..12f6d7abf 100644
--- a/stdlib/source/lux/host.jvm.lux
+++ b/stdlib/source/lux/host.jvm.lux
@@ -1344,7 +1344,7 @@
     ))
 
 (syntax: #export (object [#let [imports (class-imports *compiler*)]]
-                   [#let [class-vars (list)]]
+                   [class-vars (s;tuple (p;some (type-param^ imports)))]
                    [super (p;default object-super-class
                                      (super-class-decl^ imports class-vars))]
                    [interfaces (p;default (list)
diff --git a/stdlib/source/lux/lang/syntax.lux b/stdlib/source/lux/lang/syntax.lux
index 9fe4939a2..7bc8e8cca 100644
--- a/stdlib/source/lux/lang/syntax.lux
+++ b/stdlib/source/lux/lang/syntax.lux
@@ -613,7 +613,7 @@
                  (p;fail (Unrecognized-Input current-module))))
              )))))
 
-(def: #export (parse current-module [where offset source])
+(def: #export (read current-module [where offset source])
   (-> Text Source (e;Error [Source Code]))
   (case (p;run [offset source] (ast current-module where))
     (#e;Error error)
diff --git a/stdlib/source/lux/lang/type/check.lux b/stdlib/source/lux/lang/type/check.lux
index cbf31ac08..086866ddf 100644
--- a/stdlib/source/lux/lang/type/check.lux
+++ b/stdlib/source/lux/lang/type/check.lux
@@ -458,6 +458,16 @@
       [Type Type] [Type Type]
       (Check (List Assumption)))
   (case [eFT aFT]
+    (^or [(#;UnivQ _ _) (#;Ex _)] [(#;UnivQ _ _) (#;Var _)])
+    (do Monad<Check>
+      [eFT' (apply-type! eFT eAT)]
+      (check' eFT' (#;Apply aAT aFT) assumptions))
+
+    (^or [(#;Ex _) (#;UnivQ _ _)] [(#;Var _) (#;UnivQ _ _)])
+    (do Monad<Check>
+      [aFT' (apply-type! aFT aAT)]
+      (check' (#;Apply eAT eFT) aFT' assumptions))
+
     (^or [(#;Ex _) _] [_ (#;Ex _)])
     (do Monad<Check>
       [assumptions (check' eFT aFT assumptions)]
diff --git a/stdlib/source/lux/macro.lux b/stdlib/source/lux/macro.lux
index e65e09b58..e3cba7a31 100644
--- a/stdlib/source/lux/macro.lux
+++ b/stdlib/source/lux/macro.lux
@@ -1,8 +1,8 @@
 (;module: {#;doc "Functions for extracting information from the state of the compiler."}
   lux
-  (lux (control ["F" functor]
-                ["A" applicative]
-                ["M" monad #+ do Monad])
+  (lux (control [functor #+ Functor]
+                [applicative #+ Applicative]
+                [monad #+ do Monad])
        (data [number]
              [product]
              [ident "ident/" Codec<Text,Ident> Eq<Ident>]
@@ -15,30 +15,30 @@
 ## (type: (Meta a)
 ##   (-> Compiler (e;Error [Compiler a])))
 
-(struct: #export _ (F;Functor Meta)
+(struct: #export _ (Functor Meta)
   (def: (map f fa)
-    (function [state]
-      (case (fa state)
+    (function [compiler]
+      (case (fa compiler)
         (#e;Error msg)
         (#e;Error msg)
 
-        (#e;Success [state' a])
-        (#e;Success [state' (f a)])))))
+        (#e;Success [compiler' a])
+        (#e;Success [compiler' (f a)])))))
 
-(struct: #export _ (A;Applicative Meta)
+(struct: #export _ (Applicative Meta)
   (def: functor Functor<Meta>)
 
   (def: (wrap x)
-    (function [state]
-      (#e;Success [state x])))
+    (function [compiler]
+      (#e;Success [compiler x])))
 
   (def: (apply ff fa)
-    (function [state]
-      (case (ff state)
-        (#e;Success [state' f])
-        (case (fa state')
-          (#e;Success [state'' a])
-          (#e;Success [state'' (f a)])
+    (function [compiler]
+      (case (ff compiler)
+        (#e;Success [compiler' f])
+        (case (fa compiler')
+          (#e;Success [compiler'' a])
+          (#e;Success [compiler'' (f a)])
 
           (#e;Error msg)
           (#e;Error msg))
@@ -50,13 +50,13 @@
   (def: applicative Applicative<Meta>)
   
   (def: (join mma)
-    (function [state]
-      (case (mma state)
+    (function [compiler]
+      (case (mma compiler)
         (#e;Error msg)
         (#e;Error msg)
 
-        (#e;Success [state' ma])
-        (ma state')))))
+        (#e;Success [compiler' ma])
+        (ma compiler')))))
 
 (def: (get k plist)
   (All [a]
@@ -111,20 +111,20 @@
 
 (def: #export (find-module name)
   (-> Text (Meta Module))
-  (function [state]
-    (case (get name (get@ #;modules state))
+  (function [compiler]
+    (case (get name (get@ #;modules compiler))
       (#;Some module)
-      (#e;Success [state module])
+      (#e;Success [compiler module])
 
       _
       (#e;Error ($_ text/compose "Unknown module: " name)))))
 
 (def: #export current-module-name
   (Meta Text)
-  (function [state]
-    (case (get@ #;current-module state)
+  (function [compiler]
+    (case (get@ #;current-module compiler)
       (#;Some current-module)
-      (#e;Success [state current-module])
+      (#e;Success [compiler current-module])
 
       _
       (#e;Error "No current module.")
@@ -183,7 +183,7 @@
 (def: #export (get-doc anns)
   {#;doc "Looks-up a definition's documentation."}
   (-> Code (Maybe Text))
-  (get-text-ann ["lux" "doc"] anns))
+  (get-text-ann (ident-for #;doc) anns))
 
 (def: #export (flag-set? flag-name anns)
   {#;doc "Finds out whether an annotation-as-a-flag is set (has value 'true')."}
@@ -205,6 +205,15 @@
   [sig?      #;sig?      "a signature"]
   )
 
+(def: #export (aliased? annotations)
+  (-> Code Bool)
+  (case (get-symbol-ann (ident-for #;alias) annotations)
+    (#;Some _)
+    true
+
+    #;None
+    false))
+
 (do-template [<name> <tag> <type>]
   [(def: (<name> input)
      (-> Code (Maybe <type>))
@@ -227,7 +236,7 @@
                     (do maybe;Monad<Maybe>
                       [_args (get-ann (ident-for <tag>) anns)
                        args (parse-tuple _args)]
-                      (M;map @ parse-text args))))]
+                      (monad;map @ parse-text args))))]
 
   [func-args     #;func-args "Looks up the arguments of a function."]
   [type-args     #;type-args "Looks up the arguments of a parameterized type."]
@@ -243,22 +252,13 @@
     (if (and (macro? def-anns)
              (or (export? def-anns) (text/= module this-module)))
       (#;Some (:! Macro def-value))
-      (case (get-symbol-ann ["lux" "alias"] def-anns)
+      (case (get-symbol-ann (ident-for #;alias) def-anns)
         (#;Some [r-module r-name])
         (find-macro' modules this-module r-module r-name)
 
         _
         #;None))))
 
-(def: #export (find-macro ident)
-  (-> Ident (Meta (Maybe Macro)))
-  (do Monad<Meta>
-    [this-module current-module-name]
-    (let [[module name] ident]
-      (: (Meta (Maybe Macro))
-         (function [state]
-           (#e;Success [state (find-macro' (get@ #;modules state) this-module module name)]))))))
-
 (def: #export (normalize ident)
   {#;doc "If given an identifier without a module prefix, gives it the current module's name as prefix.
 
@@ -273,6 +273,16 @@
     _
     (:: Monad<Meta> wrap ident)))
 
+(def: #export (find-macro ident)
+  (-> Ident (Meta (Maybe Macro)))
+  (do Monad<Meta>
+    [ident (normalize ident)
+     this-module current-module-name]
+    (let [[module name] ident]
+      (: (Meta (Maybe Macro))
+         (function [compiler]
+           (#e;Success [compiler (find-macro' (get@ #;modules compiler) this-module module name)]))))))
+
 (def: #export (expand-once syntax)
   {#;doc "Given code that requires applying a macro, does it once and returns the result.
 
@@ -281,8 +291,7 @@
   (case syntax
     [_ (#;Form (#;Cons [[_ (#;Symbol name)] args]))]
     (do Monad<Meta>
-      [name' (normalize name)
-       ?macro (find-macro name')]
+      [?macro (find-macro name)]
       (case ?macro
         (#;Some macro)
         (macro args)
@@ -301,13 +310,12 @@
   (case syntax
     [_ (#;Form (#;Cons [[_ (#;Symbol name)] args]))]
     (do Monad<Meta>
-      [name' (normalize name)
-       ?macro (find-macro name')]
+      [?macro (find-macro name)]
       (case ?macro
         (#;Some macro)
         (do Monad<Meta>
           [expansion (macro args)
-           expansion' (M;map Monad<Meta> expand expansion)]
+           expansion' (monad;map Monad<Meta> expand expansion)]
           (wrap (list/join expansion')))
         
         #;None
@@ -322,29 +330,28 @@
   (case syntax
     [_ (#;Form (#;Cons [[_ (#;Symbol name)] args]))]
     (do Monad<Meta>
-      [name' (normalize name)
-       ?macro (find-macro name')]
+      [?macro (find-macro name)]
       (case ?macro
         (#;Some macro)
         (do Monad<Meta>
           [expansion (macro args)
-           expansion' (M;map Monad<Meta> expand-all expansion)]
+           expansion' (monad;map Monad<Meta> expand-all expansion)]
           (wrap (list/join expansion')))
         
         #;None
         (do Monad<Meta>
-          [parts' (M;map Monad<Meta> expand-all (list& (code;symbol name) args))]
+          [parts' (monad;map Monad<Meta> expand-all (list& (code;symbol name) args))]
           (wrap (list (code;form (list/join parts')))))))
 
     [_ (#;Form (#;Cons [harg targs]))]
     (do Monad<Meta>
       [harg+ (expand-all harg)
-       targs+ (M;map Monad<Meta> expand-all targs)]
+       targs+ (monad;map Monad<Meta> expand-all targs)]
       (wrap (list (code;form (list/compose harg+ (list/join (: (List (List Code)) targs+)))))))
 
     [_ (#;Tuple members)]
     (do Monad<Meta>
-      [members' (M;map Monad<Meta> expand-all members)]
+      [members' (monad;map Monad<Meta> expand-all members)]
       (wrap (list (code;tuple (list/join members')))))
 
     _
@@ -355,9 +362,9 @@
 
           A prefix can be given (or just be empty text \"\") to better identify the code for debugging purposes."}
   (-> Text (Meta Code))
-  (function [state]
-    (#e;Success [(update@ #;seed n.inc state)
-                 (code;symbol ["" ($_ text/compose "__gensym__" prefix (:: number;Codec<Text,Nat> encode (get@ #;seed state)))])])))
+  (function [compiler]
+    (#e;Success [(update@ #;seed n.inc compiler)
+                 (code;symbol ["" ($_ text/compose "__gensym__" prefix (:: number;Codec<Text,Nat> encode (get@ #;seed compiler)))])])))
 
 (def: (get-local-symbol ast)
   (-> Code (Meta Text))
@@ -381,7 +388,7 @@
   (case tokens
     (^ (list [_ (#;Tuple symbols)] body))
     (do Monad<Meta>
-      [symbol-names (M;map @ get-local-symbol symbols)
+      [symbol-names (monad;map @ get-local-symbol symbols)
        #let [symbol-defs (list/join (list/map (: (-> Text (List Code))
                                                  (function [name] (list (code;symbol ["" name]) (` (gensym (~ (code;text name)))))))
                                               symbol-names))]]
@@ -406,13 +413,13 @@
 
 (def: #export (module-exists? module)
   (-> Text (Meta Bool))
-  (function [state]
-    (#e;Success [state (case (get module (get@ #;modules state))
-                         (#;Some _)
-                         true
-                         
-                         #;None
-                         false)])))
+  (function [compiler]
+    (#e;Success [compiler (case (get module (get@ #;modules compiler))
+                            (#;Some _)
+                            true
+                            
+                            #;None
+                            false)])))
 
 (def: (try-both f x1 x2)
   (All [a b]
@@ -424,7 +431,7 @@
 (def: #export (find-var-type name)
   {#;doc "Looks-up the type of a local variable somewhere in the environment."}
   (-> Text (Meta Type))
-  (function [state]
+  (function [compiler]
     (let [test (: (-> [Text [Type Top]] Bool)
                   (|>. product;left (text/= name)))]
       (case (do maybe;Monad<Maybe>
@@ -433,7 +440,7 @@
                                                          (get@ [#;locals #;mappings] env)))
                                       (list;any? test (: (List [Text [Type Top]])
                                                          (get@ [#;captured #;mappings] env)))))
-                                (get@ #;scopes state))
+                                (get@ #;scopes compiler))
                [_ [type _]] (try-both (list;find test)
                                       (: (List [Text [Type Top]])
                                          (get@ [#;locals #;mappings] scope))
@@ -441,25 +448,60 @@
                                          (get@ [#;captured #;mappings] scope)))]
               (wrap type))
         (#;Some var-type)
-        (#e;Success [state var-type])
+        (#e;Success [compiler var-type])
 
         #;None
         (#e;Error ($_ text/compose "Unknown variable: " name))))))
 
+(def: #export (canonical name)
+  (-> Ident (Meta Ident))
+  (case name
+    ["" _name]
+    (do Monad<Meta>
+      [this-module current-module-name]
+      (wrap [this-module _name]))
+
+    [_module _name]
+    (do Monad<Meta>
+      [this-module-name current-module-name
+       this-module (find-module this-module-name)]
+      (case (list;find (|>. product;left (text/= _module))
+                       (get@ #;module-aliases this-module))
+        (#;Some [alias real])
+        (wrap [real _name])
+
+        _
+        (wrap name)))
+    ))
+
 (def: #export (find-def name)
   {#;doc "Looks-up a definition's whole data in the available modules (including the current one)."}
   (-> Ident (Meta Def))
-  (function [state]
-    (case (: (Maybe Def)
-             (do maybe;Monad<Maybe>
-               [#let [[v-prefix v-name] name]
-                (^slots [#;defs]) (get v-prefix (get@ #;modules state))]
-               (get v-name defs)))
-      (#;Some _anns)
-      (#e;Success [state _anns])
+  (do Monad<Meta>
+    [name (canonical name)]
+    (function [compiler]
+      (case (: (Maybe Def)
+               (do maybe;Monad<Maybe>
+                 [#let [[v-prefix v-name] name]
+                  (^slots [#;defs]) (get v-prefix (get@ #;modules compiler))]
+                 (get v-name defs)))
+        (#;Some definition)
+        (#e;Success [compiler definition])
 
-      _
-      (#e;Error ($_ text/compose "Unknown definition: " (ident/encode name))))))
+        _
+        (let [current-module (|> compiler (get@ #;current-module) (maybe;default "???"))]
+          (#e;Error ($_ text/compose
+                        "Unknown definition: " (ident/encode name) "\n"
+                        "    Current module: " current-module "\n"
+                        (case (get current-module (get@ #;modules compiler))
+                          (#;Some this-module)
+                          ($_ text/compose
+                              "           Imports: " (|> this-module (get@ #;imports) (text;join-with ", ")) "\n"
+                              "           Aliases: " (|> this-module (get@ #;module-aliases) (list/map (function [[alias real]] ($_ text/compose alias " => " real))) (text;join-with ", ")) "\n")
+
+                          _
+                          "")
+                        " All Known modules: " (|> compiler (get@ #;modules) (list/map product;left) (text;join-with ", ")) "\n")))))))
 
 (def: #export (find-def-type name)
   {#;doc "Looks-up a definition's type in the available modules (including the current one)."}
@@ -473,10 +515,13 @@
   (-> Ident (Meta Type))
   (do Monad<Meta>
     [#let [[_ _name] name]]
-    (either (find-var-type _name)
-            (do @
-              [name (normalize name)]
-              (find-def-type name)))))
+    (case name
+      ["" _name]
+      (either (find-var-type _name)
+              (find-def-type name))
+
+      _
+      (find-def-type name))))
 
 (def: #export (find-type-def name)
   {#;doc "Finds the value of a type definition (such as Int, Top or Compiler)."}
@@ -488,10 +533,10 @@
 (def: #export (defs module-name)
   {#;doc "The entire list of definitions in a module (including the unexported/private ones)."}
   (-> Text (Meta (List [Text Def])))
-  (function [state]
-    (case (get module-name (get@ #;modules state))
+  (function [compiler]
+    (case (get module-name (get@ #;modules compiler))
       #;None          (#e;Error ($_ text/compose "Unknown module: " module-name))
-      (#;Some module) (#e;Success [state (get@ #;defs module)])
+      (#;Some module) (#e;Success [compiler (get@ #;defs module)])
       )))
 
 (def: #export (exports module-name)
@@ -507,10 +552,10 @@
 (def: #export modules
   {#;doc "All the available modules (including the current one)."}
   (Meta (List [Text Module]))
-  (function [state]
-    (|> state
+  (function [compiler]
+    (|> compiler
         (get@ #;modules)
-        [state]
+        [compiler]
         #e;Success)))
 
 (def: #export (tags-of type-name)
@@ -529,16 +574,16 @@
 (def: #export cursor
   {#;doc "The cursor of the current expression being analyzed."}
   (Meta Cursor)
-  (function [state]
-    (#e;Success [state (get@ #;cursor state)])))
+  (function [compiler]
+    (#e;Success [compiler (get@ #;cursor compiler)])))
 
 (def: #export expected-type
   {#;doc "The expected type of the current expression being analyzed."}
   (Meta Type)
-  (function [state]
-    (case (get@ #;expected state)
+  (function [compiler]
+    (case (get@ #;expected compiler)
       (#;Some type)
-      (#e;Success [state type])
+      (#e;Success [compiler type])
 
       #;None
       (#e;Error "Not expecting any type."))))
@@ -583,13 +628,13 @@
 (def: #export locals
   {#;doc "All the local variables currently in scope, separated in different scopes."}
   (Meta (List (List [Text Type])))
-  (function [state]
-    (case (list;inits (get@ #;scopes state))
+  (function [compiler]
+    (case (list;inits (get@ #;scopes compiler))
       #;None
       (#e;Error "No local environment")
 
       (#;Some scopes)
-      (#e;Success [state
+      (#e;Success [compiler
                    (list/map (|>. (get@ [#;locals #;mappings])
                                   (list/map (function [[name [type _]]]
                                               [name type])))
@@ -599,8 +644,7 @@
   {#;doc "Given an aliased definition's name, returns the original definition being referenced."}
   (-> Ident (Meta Ident))
   (do Monad<Meta>
-    [def-name (normalize def-name)
-     [_ def-anns _] (find-def def-name)]
+    [[_ def-anns _] (find-def def-name)]
     (case (get-symbol-ann (ident-for #;alias) def-anns)
       (#;Some real-def-name)
       (wrap real-def-name)
diff --git a/stdlib/source/lux/test.lux b/stdlib/source/lux/test.lux
index d296a9a2e..f8cfa9871 100644
--- a/stdlib/source/lux/test.lux
+++ b/stdlib/source/lux/test.lux
@@ -1,6 +1,6 @@
 (;module: {#;doc "Tools for unit & property-based/generative testing."}
   lux
-  (lux [macro #+ Monad<Meta> with-gensyms]
+  (lux [macro #+ with-gensyms]
        (macro ["s" syntax #+ syntax: Syntax]
               [code])
        (control [monad #+ do Monad]
@@ -12,7 +12,7 @@
              [text]
              text/format
              ["e" error])
-       [io #- run]
+       [io #+ IO io]
        (time [instant]
              [duration])
        ["r" math/random]))
@@ -199,7 +199,7 @@
 
 (def: (exported-tests module-name)
   (-> Text (Meta (List [Text Text Text])))
-  (do Monad<Meta>
+  (do macro;Monad<Meta>
     [defs (macro;exports module-name)]
     (wrap (|> defs
               (list/map (function [[def-name [_ def-anns _]]]
diff --git a/stdlib/source/lux/type/object.lux b/stdlib/source/lux/type/object.lux
index fc68dcdae..a7945b41a 100644
--- a/stdlib/source/lux/type/object.lux
+++ b/stdlib/source/lux/type/object.lux
@@ -143,8 +143,7 @@
   [(def: (<name> name)
      (-> Ident (Meta [Ident (List Ident)]))
      (do Monad<Meta>
-       [name (macro;normalize name)
-        [_ annotations _] (macro;find-def name)]
+       [[_ annotations _] (macro;find-def name)]
        (case [(macro;get-tag-ann (ident-for <name-tag>) annotations)
               (macro;get-tag-ann (ident-for <parent-tag>) annotations)]
          [(#;Some real-name) (#;Some parent)]
diff --git a/stdlib/test/test/lux/concurrency/atom.lux b/stdlib/test/test/lux/concurrency/atom.lux
index 90c1c07d2..039546436 100644
--- a/stdlib/test/test/lux/concurrency/atom.lux
+++ b/stdlib/test/test/lux/concurrency/atom.lux
@@ -18,17 +18,17 @@
          #let [box (&;atom value)]]
         ($_ seq
             (test "Can obtain the value of an atom."
-                  (n.= value (io;run (&;get box))))
+                  (n.= value (io;run (&;read box))))
 
             (test "Can swap the value of an atom."
                   (and (io;run (&;compare-and-swap value swap-value box))
-                       (n.= swap-value (io;run (&;get box)))))
+                       (n.= swap-value (io;run (&;read box)))))
 
             (test "Can update the value of an atom."
                   (exec (io;run (&;update n.inc box))
-                    (n.= (n.inc swap-value) (io;run (&;get box)))))
+                    (n.= (n.inc swap-value) (io;run (&;read box)))))
 
             (test "Can immediately set the value of an atom."
-                  (exec (io;run (&;set set-value box))
-                    (n.= set-value (io;run (&;get box)))))
+                  (exec (io;run (&;write set-value box))
+                    (n.= set-value (io;run (&;read box)))))
             ))))
diff --git a/stdlib/test/test/lux/data/coll/dict.lux b/stdlib/test/test/lux/data/coll/dict.lux
index f2e47615a..536ad8450 100644
--- a/stdlib/test/test/lux/data/coll/dict.lux
+++ b/stdlib/test/test/lux/data/coll/dict.lux
@@ -8,7 +8,7 @@
              [number]
              [maybe]
              (coll ["&" dict]
-                   [list "L/" Fold<List> Functor<List>]))
+                   [list "list/" Fold<List> Functor<List>]))
        ["r" math/random])
   lux/test)
 
@@ -30,7 +30,7 @@
                     (not (&;empty? dict))))
             
             (test "The functions 'entries', 'keys' and 'values' should be synchronized."
-                  (:: (list;Eq<List> (eq;seq number;Eq<Nat> number;Eq<Nat>)) =
+                  (:: (list;Eq<List> (eq;pair number;Eq<Nat> number;Eq<Nat>)) =
                       (&;entries dict)
                       (list;zip2 (&;keys dict)
                                  (&;values dict))))
@@ -99,7 +99,7 @@
 
             (test "If you merge, and the second dict has overlapping keys, it should overwrite yours."
                   (let [dict' (|> dict &;entries
-                                  (L/map (function [[k v]] [k (n.inc v)]))
+                                  (list/map (function [[k v]] [k (n.inc v)]))
                                   (&;from-list number;Hash<Nat>))
                         (^open) (&;Eq<Dict> number;Eq<Nat>)]
                     (= dict' (&;merge dict' dict))))
diff --git a/stdlib/test/test/lux/host.jvm.lux b/stdlib/test/test/lux/host.jvm.lux
index d41c587c8..070457799 100644
--- a/stdlib/test/test/lux/host.jvm.lux
+++ b/stdlib/test/test/lux/host.jvm.lux
@@ -11,6 +11,8 @@
        ["r" math/random])
   lux/test)
 
+(&;import (java.util.concurrent.Callable a))
+
 (&;import java.lang.Exception
   (new [String]))
 
@@ -44,11 +46,17 @@
   )
 
 (def: test-runnable
-  (object [Runnable]
+  (object [] [Runnable]
     []
     (Runnable [] (run) void
               [])))
 
+(def: test-callable
+  (object [a] [(Callable a)]
+    []
+    (Callable [] (call) a
+              (undefined))))
+
 (interface: TestInterface
   ([] foo [boolean String] void #throws [Exception]))
 
diff --git a/stdlib/test/test/lux/lang/syntax.lux b/stdlib/test/test/lux/lang/syntax.lux
index 154e18a91..3eb9bfc02 100644
--- a/stdlib/test/test/lux/lang/syntax.lux
+++ b/stdlib/test/test/lux/lang/syntax.lux
@@ -80,20 +80,20 @@
          other code^]
         ($_ seq
             (test "Can parse Lux code."
-                  (case (&;parse "" [default-cursor +0 (code;to-text sample)])
+                  (case (&;read "" [default-cursor +0 (code;to-text sample)])
                     (#e;Error error)
                     false
 
                     (#e;Success [_ parsed])
                     (:: code;Eq<Code> = parsed sample)))
             (test "Can parse Lux multiple code nodes."
-                  (case (&;parse "" [default-cursor +0 (format (code;to-text sample) " "
-                                                               (code;to-text other))])
+                  (case (&;read "" [default-cursor +0 (format (code;to-text sample) " "
+                                                              (code;to-text other))])
                     (#e;Error error)
                     false
 
                     (#e;Success [remaining =sample])
-                    (case (&;parse "" remaining)
+                    (case (&;read "" remaining)
                       (#e;Error error)
                       false
 
@@ -114,11 +114,11 @@
          signed? r;bool
          #let [expected (|> numerator (f./ denominator) (f.* (if signed? -1.0 1.0)))]]
         (test "Can parse frac ratio syntax."
-              (case (&;parse "" [default-cursor +0
-                                 (format (if signed? "-" "")
-                                         (%i (frac-to-int numerator))
-                                         "/"
-                                         (%i (frac-to-int denominator)))])
+              (case (&;read "" [default-cursor +0
+                                (format (if signed? "-" "")
+                                        (%i (frac-to-int numerator))
+                                        "/"
+                                        (%i (frac-to-int denominator)))])
                 (#e;Success [_ [_ (#;Frac actual)]])
                 (f.= expected actual)
 
@@ -131,8 +131,8 @@
       (do @
         [expected (|> r;nat (:: @ map (n.% +1_000)))]
         (test "Can parse nat char syntax."
-              (case (&;parse "" [default-cursor +0
-                                 (format "#" (%t (text;from-code expected)) "")])
+              (case (&;read "" [default-cursor +0
+                                (format "#" (%t (text;from-code expected)) "")])
                 (#e;Success [_ [_ (#;Nat actual)]])
                 (n.= expected actual)
 
@@ -181,8 +181,8 @@
                   (let [bad-match (format (text;from-code x) "\n"
                                           (text;from-code y) "\n"
                                           (text;from-code z))]
-                    (case (&;parse "" [default-cursor +0
-                                       (format "\"" bad-match "\"")])
+                    (case (&;read "" [default-cursor +0
+                                      (format "\"" bad-match "\"")])
                       (#e;Error error)
                       true
 
@@ -195,9 +195,9 @@
                         good-output (format (text;from-code x) "\n"
                                             (text;from-code y) "\n"
                                             (text;from-code z))]
-                    (case (&;parse "" [(|> default-cursor (update@ #;column (n.+ (n.dec offset-size))))
-                                       +0
-                                       (format "\"" good-input "\"")])
+                    (case (&;read "" [(|> default-cursor (update@ #;column (n.+ (n.dec offset-size))))
+                                      +0
+                                      (format "\"" good-input "\"")])
                       (#e;Error error)
                       false
 
@@ -206,25 +206,25 @@
                           parsed
                           (code;text good-output)))))
             (test "Can handle comments."
-                  (case (&;parse "" [default-cursor +0
-                                     (format comment (code;to-text sample))])
+                  (case (&;read "" [default-cursor +0
+                                    (format comment (code;to-text sample))])
                     (#e;Error error)
                     false
 
                     (#e;Success [_ parsed])
                     (:: code;Eq<Code> = parsed sample)))
             (test "Will reject unbalanced multi-line comments."
-                  (and (case (&;parse "" [default-cursor +0
-                                          (format "#(" "#(" unbalanced-comment ")#"
-                                                  (code;to-text sample))])
+                  (and (case (&;read "" [default-cursor +0
+                                         (format "#(" "#(" unbalanced-comment ")#"
+                                                 (code;to-text sample))])
                          (#e;Error error)
                          true
 
                          (#e;Success [_ parsed])
                          false)
-                       (case (&;parse "" [default-cursor +0
-                                          (format "#(" unbalanced-comment ")#" ")#"
-                                                  (code;to-text sample))])
+                       (case (&;read "" [default-cursor +0
+                                         (format "#(" unbalanced-comment ")#" ")#"
+                                                 (code;to-text sample))])
                          (#e;Error error)
                          true