From 8871528f60958a45eb119a5cc487f87215e4e92f Mon Sep 17 00:00:00 2001
From: Paul Phillips <paulp@improving.org>
Date: Fri, 11 Sep 2009 13:11:04 +0000
Subject: A bundle of small bugfixes to recent patches.

---
 src/compiler/scala/tools/nsc/symtab/Symbols.scala    | 2 +-
 src/compiler/scala/tools/nsc/transform/UnCurry.scala | 6 ++----
 src/library/scala/Option.scala                       | 7 +++++++
 src/library/scala/Predef.scala                       | 1 -
 src/library/scala/xml/XML.scala                      | 2 +-
 5 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/src/compiler/scala/tools/nsc/symtab/Symbols.scala b/src/compiler/scala/tools/nsc/symtab/Symbols.scala
index 745782fbdf..885ff0d8ee 100644
--- a/src/compiler/scala/tools/nsc/symtab/Symbols.scala
+++ b/src/compiler/scala/tools/nsc/symtab/Symbols.scala
@@ -447,7 +447,7 @@ trait Symbols {
         // since we default to enabled by default, only look hard for falsity
         annot.args match {
           case Literal(Constant(x: Int)) :: Nil => Some(x)
-          case x => println(x) ; None
+          case _                                => None
         }
       }
     }
diff --git a/src/compiler/scala/tools/nsc/transform/UnCurry.scala b/src/compiler/scala/tools/nsc/transform/UnCurry.scala
index 5d1f30d9b6..9f1897353e 100644
--- a/src/compiler/scala/tools/nsc/transform/UnCurry.scala
+++ b/src/compiler/scala/tools/nsc/transform/UnCurry.scala
@@ -536,10 +536,8 @@ abstract class UnCurry extends InfoTransform with TypingTransformers {
           // XXX settings.noassertions.value temporarily retained to avoid
           // breakage until a reasonable interface is settled upon.
           def elideFunctionCall(sym: Symbol) =
-            sym != null && (sym.elisionLevel match {
-              case Some(x)  => (x < settings.elideLevel.value) || settings.noassertions.value
-              case _        => false
-            })
+            sym != null && sym.elisionLevel.exists(x => x < settings.elideLevel.value || settings.noassertions.value)
+
           if (elideFunctionCall(fn.symbol)) {
             Literal(()).setPos(tree.pos).setType(UnitClass.tpe)
           } else if (fn.symbol == Object_synchronized && shouldBeLiftedAnyway(args.head)) {
diff --git a/src/library/scala/Option.scala b/src/library/scala/Option.scala
index df2d9639c1..c3605c7c1b 100644
--- a/src/library/scala/Option.scala
+++ b/src/library/scala/Option.scala
@@ -106,6 +106,13 @@ sealed abstract class Option[+A] extends Product {
   def filter(p: A => Boolean): Option[A] =
     if (isEmpty || p(this.get)) this else None
 
+  /** If the option is nonempty, p(value), otherwise false.
+   *
+   *  @param  p   the predicate to test
+   */
+  def exists(p: A => Boolean): Boolean =
+    !isEmpty && p(this.get)
+
   /** Apply the given procedure <code>f</code> to the option's value,
    *  if it is nonempty. Do nothing if it is empty.
    *
diff --git a/src/library/scala/Predef.scala b/src/library/scala/Predef.scala
index f359a3ccd1..bb2e05248f 100644
--- a/src/library/scala/Predef.scala
+++ b/src/library/scala/Predef.scala
@@ -12,7 +12,6 @@
 package scala
 
 import collection.immutable.StringOps
-import collection.mutable.StringBuilder
 import collection.generic.BuilderFactory
 
 /** The <code>Predef</code> object provides definitions that are
diff --git a/src/library/scala/xml/XML.scala b/src/library/scala/xml/XML.scala
index 13b62539f3..0c3ea5e295 100644
--- a/src/library/scala/xml/XML.scala
+++ b/src/library/scala/xml/XML.scala
@@ -77,7 +77,7 @@ object XML extends XMLLoader[Elem]
     node: Node,
     enc: String = encoding,
     xmlDecl: Boolean = false,
-    doctype: dtd.DocType
+    doctype: dtd.DocType = null
     ): Unit =
   {
     val fos = new FileOutputStream(filename)
-- 
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