From d48c3ff75f23a62c7f13ff411c25073e618b19de Mon Sep 17 00:00:00 2001
From: Eduardo Julian
Date: Fri, 10 Jul 2020 00:06:16 -0400
Subject: Fixes and improvements to JavaScript compilation.

---
 lux-js/source/program.lux | 35 ++++++++++++++++++++++-------------
 1 file changed, 22 insertions(+), 13 deletions(-)

(limited to 'lux-js/source')

diff --git a/lux-js/source/program.lux b/lux-js/source/program.lux
index cebede1ab..3ecd9891b 100644
--- a/lux-js/source/program.lux
+++ b/lux-js/source/program.lux
@@ -13,6 +13,7 @@
     [concurrency
      ["." promise (#+ Promise)]]]
    [data
+    ["." product]
     ["." maybe]
     [number
      ["." i64]
@@ -32,6 +33,8 @@
    [tool
     [compiler
      [phase (#+ Operation Phase)]
+     [reference
+      [variable (#+ Register)]]
      [language
       [lux
        [program (#+ Program)]
@@ -145,7 +148,7 @@
        (|> value .nat runtime.low jvm-int)
 
        _
-       (error! (exception.construct unknown-member [member (:coerce java/lang/Object value)]))))
+       (error! (exception.construct ..unknown-member [member (:coerce java/lang/Object value)]))))
     ))
 
 (def: (::toString js-object)
@@ -228,7 +231,7 @@
          (|> value (array.read 2) maybe.assume js-object (:coerce java/lang/Object))
          
          _
-         (error! (exception.construct unknown-member [(:coerce Text member) (:coerce java/lang/Object value)])))
+         (error! (exception.construct ..unknown-member [(:coerce Text member) (:coerce java/lang/Object value)])))
        )
       (jdk/nashorn/api/scripting/AbstractJSObject
        [] (getSlot self {idx int}) java/lang/Object
@@ -239,7 +242,14 @@
            (:coerce java/lang/Object)))
       )))
 
-(exception: null-has-no-lux-representation)
+(exception: (null-has-no-lux-representation {code (Maybe _.Expression)})
+  (case code
+    (#.Some code)
+    (_.code code)
+
+    #.None
+    "???"))
+
 (exception: undefined-has-no-lux-representation)
 
 (exception: (unknown-kind-of-host-object {object java/lang/Object})
@@ -322,7 +332,7 @@
 (def: (lux-object js-object)
   (-> java/lang/Object (Try Any))
   (`` (<| (if (host.null? js-object)
-            (exception.throw ..null-has-no-lux-representation []))
+            (exception.throw ..null-has-no-lux-representation [#.None]))
           (case (host.check jdk/nashorn/internal/runtime/Undefined js-object)
             (#.Some _)
             (exception.throw ..undefined-has-no-lux-representation [])
@@ -391,7 +401,7 @@
 
 (def: (expander macro inputs lux)
   Expander
-  (case (ensure-macro macro)
+  (case (..ensure-macro macro)
     (#.Some macro)
     (case (call-macro inputs lux macro)
       (#try.Success output)
@@ -409,14 +419,13 @@
 (def: (evaluate! interpreter alias input)
   (-> javax/script/ScriptEngine Text _.Expression (Try Any))
   (do try.monad
-    [?output (javax/script/ScriptEngine::eval (_.code input) interpreter)
-     output (case ?output
-              (#.Some output)
-              (wrap output)
+    [?output (javax/script/ScriptEngine::eval (_.code input) interpreter)]
+    (case ?output
+      (#.Some output)
+      (..lux-object output)
 
-              #.None
-              (exception.throw ..null-has-no-lux-representation []))]
-    (..lux-object output)))
+      #.None
+      (exception.throw ..null-has-no-lux-representation [(#.Some input)]))))
 
 (def: (execute! interpreter alias input)
   (-> javax/script/ScriptEngine Text _.Statement (Try Any))
@@ -456,7 +465,7 @@
                 (..evaluate! interpreter "" (_.var (reference.artifact context))))))))))
 
 (def: platform
-  (IO (Platform _.Var _.Expression _.Statement))
+  (IO (Platform [Register Text] _.Expression _.Statement))
   (do io.monad
     [host ..host]
     (wrap {#platform.&file-system (file.async file.system)
-- 
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