Maintenance of Predef.

1) Deprecates much of Predef and scala.Console, especially:

 - the read* methods (see below)
 - the set{Out,Err,In} methods (see SI-4793)

2) Removed long-deprecated:

 - Predef#exit
 - Predef#error should have gone, but could not due to sbt

At least the whole source base has now been future-proofed
against the eventual removal of Predef#error.

The low justification for the read* methods should be readily
apparent: they are little used and have no call to be in global
namespace, especially given their weird ad hoc semantics and
unreasonably tempting names such as readBoolean().

3) Segregated the deprecated elements in Predef from the part
which still thrives.

4) Converted all the standard Predef implicits into implicit
classes, value classes where possible:

  - ArrowAssoc, Ensuring, StringFormat, StringAdd, RichException (value)
  - SeqCharSequence, ArrayCharSequence (non-value)

Non-implicit deprecated stubs prop up the names of the
formerly converting methods.

1 files changed, 25 insertions, 25 deletions

diff --git a/test/files/run/exceptions-2.scala b/test/files/run/exceptions-2.scala
index d0312a49b2..f5bbcca210 100644
--- a/test/files/run/exceptions-2.scala
+++ b/test/files/run/exceptions-2.scala
@@ -42,14 +42,14 @@ object NoExcep {
   def method4 = try {
     Console.println("..");
   } catch {
-    case _ => error("..");
+    case _ => sys.error("..");
   }
 }
 
 object Test {
   def nested1: Unit = try {
     try {
-      error("nnnnoooo");
+      sys.error("nnnnoooo");
     } finally {
       Console.println("Innermost finally");
     }
@@ -59,7 +59,7 @@ object Test {
 
   def nested2 =  try {
     try {
-      error("nnnnoooo");
+      sys.error("nnnnoooo");
     } finally {
       Console.println("Innermost finally");
     }
@@ -68,7 +68,7 @@ object Test {
     Console.println("Outermost finally");
   }
 
-  def mixed = 
+  def mixed =
     try {
       if (10 > 0)
         throw Leaf(10);
@@ -107,7 +107,7 @@ object Test {
       case Leaf(a) => Console.println(a);
     }
   } catch {
-    case npe: NullPointerException => 
+    case npe: NullPointerException =>
       Console.println("Caught an NPE");
   }
 
@@ -134,21 +134,21 @@ object Test {
       ()
     } finally {
       try {
-        error("a");
+        sys.error("a");
       } catch {
         case _ => Console.println("Silently ignore exception in finally");
       }
     }
   }
 
-  def valInFinally: Unit = 
-    try {    
+  def valInFinally: Unit =
+    try {
     } finally {
       val fin = "Abc";
       Console.println(fin);
     };
 
-  def tryAndValInFinally: Unit = 
+  def tryAndValInFinally: Unit =
     try {
     } finally {
       val fin = "Abc";
@@ -157,51 +157,51 @@ object Test {
       } catch { case _ => () }
     };
 
-  def returnInBody: Unit = try { 
+  def returnInBody: Unit = try {
     try {
       Console.println("Normal execution...");
-      return 
+      return
       Console.println("non reachable code");
     } finally {
       Console.println("inner finally");
     }
-  } finally { 
+  } finally {
     Console.println("Outer finally");
   }
 
-  def returnInBodySynch: Unit = try { 
+  def returnInBodySynch: Unit = try {
     synchronized {
       try {
         Console.println("Synchronized normal execution...");
-        return 
+        return
         Console.println("non reachable code");
       } finally {
         Console.println("inner finally");
       }
     }
-  } finally { 
+  } finally {
     Console.println("Outer finally");
   }
 
 
-  def returnInBodyAndInFinally: Unit = try { 
+  def returnInBodyAndInFinally: Unit = try {
     try {
       Console.println("Normal execution...");
-      return 
+      return
       Console.println("non reachable code");
     } finally {
       Console.println("inner finally");
       return
     }
-  } finally { 
+  } finally {
     Console.println("Outer finally");
     return
   }
 
-  def returnInBodyAndInFinally2: Unit = try { 
+  def returnInBodyAndInFinally2: Unit = try {
     try {
       Console.println("Normal execution...");
-      return 
+      return
       Console.println("non reachable code");
     } finally {
       try {
@@ -211,7 +211,7 @@ object Test {
         Console.println("finally inside finally");
       }
     }
-  } finally { 
+  } finally {
     Console.println("Outer finally");
     return
   }
@@ -253,7 +253,7 @@ object Test {
   }
 
 
-  def returnWithFinallyClean: Int = try { 
+  def returnWithFinallyClean: Int = try {
     try {
       Console.println("Normal execution...");
       return 10
@@ -262,7 +262,7 @@ object Test {
     } finally {
       Console.println("inner finally");
     }
-  } finally { 
+  } finally {
     Console.println("Outer finally");
     try { 1 } catch { case e: java.io.IOException => () }
   }
@@ -294,7 +294,7 @@ object Test {
 
     Console.println("mixed: ");
     execute(mixed);
-    
+
     Console.println("withValue1:");
     execute(withValue1);
 
@@ -322,7 +322,7 @@ object Test {
 
     Console.println("NoExcep.method3:");
     execute(NoExcep.method3);
-    
+
     Console.println("NoExcep.method4:");
     execute(NoExcep.method4);