From b81f241bd90092f52a47f64f4dc8297cc4f82f56 Mon Sep 17 00:00:00 2001
From: Eduardo Julian
Date: Fri, 19 May 2017 23:54:16 -0400
Subject: - WIP: Added pattern-matching (case) analysis.

---
 new-luxc/source/luxc/analyser.lux | 26 +++++++++++++++++++++-----
 1 file changed, 21 insertions(+), 5 deletions(-)

(limited to 'new-luxc/source/luxc/analyser.lux')

diff --git a/new-luxc/source/luxc/analyser.lux b/new-luxc/source/luxc/analyser.lux
index eba8ae62a..d8f5abe9b 100644
--- a/new-luxc/source/luxc/analyser.lux
+++ b/new-luxc/source/luxc/analyser.lux
@@ -19,9 +19,23 @@
      ["&&;" reference]
      ["&&;" type]
      ["&&;" struct]
-     ## ["&&;" case]
+     ["&&;" case]
      ["&&;" proc]))
 
+(def: (to-branches raw)
+  (-> (List Code) (Lux (List [Code Code])))
+  (case raw
+    (^ (list))
+    (:: Monad<Lux> wrap (list))
+
+    (^ (list& patternH bodyH inputT))
+    (do Monad<Lux>
+      [outputT (to-branches inputT)]
+      (wrap (list& [patternH bodyH] outputT)))
+
+    _
+    (&;fail "Uneven expressions for pattern-matching.")))
+
 (def: #export (analyser eval)
   (-> &;Eval &;Analyser)
   (: (-> Code (Lux la;Analysis))
@@ -67,10 +81,12 @@
                               [_ (#;Tuple args)])))
              (&&proc;analyse-proc analyse proc args)
 
-             ## (^ (#;Form (list& [_ (#;Symbol ["" "_lux_case"])]
-             ##                   input
-             ##                   branches)))
-             ## (&&case;analyse-case analyse proc branches)
+             (^ (#;Form (list& [_ (#;Symbol ["" "_lux_case"])]
+                               input
+                               branches)))
+             (do Monad<Lux>
+               [paired (to-branches branches)]
+               (&&case;analyse-case analyse input paired))
 
              (^ (#;Form (list [_ (#;Nat tag)]
                               value)))
-- 
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