Added extractor (for scala pattern matching) for ItemStack

src/net/bdew/lib/items/IStack.scala

@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) bdew, 2013 - 2014
+ * https://github.com/bdew/bdlib
+ *
+ * This mod is distributed under the terms of the Minecraft Mod Public
+ * License 1.0, or MMPL. Please check the contents of the license located in
+ * https://raw.github.com/bdew/bdlib/master/MMPL-1.0.txt
+ */
+
+package net.bdew.lib.items
+
+import net.minecraft.item.{Item, ItemStack}
+
+/**
+ * Allows matching Items in ItemStacks in scala pattern matches
+ */
+object IStack {
+  def unapply(x: ItemStack): Option[Item] =
+    if (x == null || x.getItem == null)
+      None
+    else
+      Some(x.getItem)
+}