From 2c3a81ca101e103c1defa5e34aaeefa096911c0b Mon Sep 17 00:00:00 2001
From: Jason Zaugg <jzaugg@gmail.com>
Date: Thu, 25 Jul 2013 13:55:06 +1000
Subject: Disallow await in pattern guards (for now)

---
 src/main/scala/scala/async/internal/AsyncAnalysis.scala | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src/main/scala/scala/async/internal/AsyncAnalysis.scala')

diff --git a/src/main/scala/scala/async/internal/AsyncAnalysis.scala b/src/main/scala/scala/async/internal/AsyncAnalysis.scala
index 62842c9..122109e 100644
--- a/src/main/scala/scala/async/internal/AsyncAnalysis.scala
+++ b/src/main/scala/scala/async/internal/AsyncAnalysis.scala
@@ -63,6 +63,9 @@ trait AsyncAnalysis {
         case ValDef(mods, _, _, _) if mods.hasFlag(Flag.LAZY) =>
           // TODO lift this restriction
           abort(tree.pos, "lazy vals are illegal within an async block")
+        case CaseDef(_, guard, _) if guard exists isAwait     =>
+          // TODO lift this restriction
+          reportUnsupportedAwait(tree, "pattern guard")
         case _                                                =>
           super.traverse(tree)
       }
-- 
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