Enhancement - Filter object

- Almost implemented the Filter object.

src/Filter.cpp

@@ -0,0 +1,72 @@
+////////////////////////////////////////////////////////////////////////////////
+// task - a command line task list manager.
+//
+// Copyright 2006 - 2009, Paul Beckingham.
+// All rights reserved.
+//
+// This program is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free Software
+// Foundation; either version 2 of the License, or (at your option) any later
+// version.
+//
+// This program is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+// FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+// details.
+//
+// You should have received a copy of the GNU General Public License along with
+// this program; if not, write to the
+//
+//     Free Software Foundation, Inc.,
+//     51 Franklin Street, Fifth Floor,
+//     Boston, MA
+//     02110-1301
+//     USA
+//
+////////////////////////////////////////////////////////////////////////////////
+
+#include "Filter.h"
+
+////////////////////////////////////////////////////////////////////////////////
+Filter::Filter ()
+{
+}
+
+////////////////////////////////////////////////////////////////////////////////
+Filter::Filter (const Filter& other)
+{
+  throw std::string ("unimplemented Filter::Filter");
+  *this = other;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+Filter& Filter::operator= (const Filter& other)
+{
+  throw std::string ("unimplemented Filter::operator=");
+  if (this != &other)
+  {
+    *this = other;
+  }
+
+  return *this;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+Filter::~Filter ()
+{
+}
+
+////////////////////////////////////////////////////////////////////////////////
+bool Filter::pass (Record& record)
+{
+  throw std::string ("unimplemented Filter::pass");
+/*
+  foreach (att, (*this))
+    if (! att->match (record))
+      return false;
+*/
+
+  return true;
+}
+
+////////////////////////////////////////////////////////////////////////////////