From 2f77d20394274e89da509716b4cf78fba9724e46 Mon Sep 17 00:00:00 2001
From: Eduardo Julian
Date: Sun, 26 Feb 2017 20:17:23 -0400
Subject: - Added try-catch procedure to JS backend.

---
 luxc/src/lux/compiler/js/proc/common.clj |  8 +++++++-
 luxc/src/lux/compiler/js/rt.clj          | 14 +++++++++++++-
 2 files changed, 20 insertions(+), 2 deletions(-)

(limited to 'luxc/src')

diff --git a/luxc/src/lux/compiler/js/proc/common.clj b/luxc/src/lux/compiler/js/proc/common.clj
index a1b26a45b..08bf94b04 100644
--- a/luxc/src/lux/compiler/js/proc/common.clj
+++ b/luxc/src/lux/compiler/js/proc/common.clj
@@ -49,6 +49,11 @@
         =right (compile ?right)]
     (return (str "(" =left " === " =right ")"))))
 
+(defn ^:private compile-lux-try [compile ?values special-args]
+  (|do [:let [(&/$Cons ?op (&/$Nil)) ?values]
+        =op (compile ?op)]
+    (return (str "LuxRT.runTry(" =op ")"))))
+
 (defn ^:private compile-array-new [compile ?values special-args]
   (|do [:let [(&/$Cons ?length (&/$Nil)) ?values]
         =length (compile ?length)]
@@ -496,7 +501,8 @@
   (case category
     "lux"
     (case proc
-      "is"                   (compile-lux-is compile ?values special-args))
+      "is"                   (compile-lux-is compile ?values special-args)
+      "try"                  (compile-lux-try compile ?values special-args))
 
     "io"
     (case proc
diff --git a/luxc/src/lux/compiler/js/rt.clj b/luxc/src/lux/compiler/js/rt.clj
index 2416445e5..e6a50b373 100644
--- a/luxc/src/lux/compiler/js/rt.clj
+++ b/luxc/src/lux/compiler/js/rt.clj
@@ -1375,11 +1375,23 @@
                     "})")
      }))
 
+(def ^:private lux-methods
+  {"runTry" (str "(function runTry(op) {"
+                 (str "try {"
+                      (str "return [1,'',op(null)];")
+                      "}"
+                      "catch(ex) {"
+                      (str "return [0,null,ex.toString()];")
+                      "}")
+                 "})")
+   })
+
 (def LuxRT "LuxRT")
 
 (def compile-LuxRT
   (|do [_ (&&/run-js! "var console = { log: print };")
-        :let [rt-object (str "{" (->> (merge adt-methods
+        :let [rt-object (str "{" (->> (merge lux-methods
+                                             adt-methods
                                              i64-methods
                                              n64-methods
                                              text-methods
-- 
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