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extern/stdcxx/4.2.1/examples/manual/remove.cpp

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+/**************************************************************************
+ *
+ * remove.cpp - Example program of remove algorithm.
+ *
+ * $Id: remove.cpp 648752 2008-04-16 17:01:56Z faridz $
+ *
+ ***************************************************************************
+ *
+ * Licensed to the Apache Software  Foundation (ASF) under one or more
+ * contributor  license agreements.  See  the NOTICE  file distributed
+ * with  this  work  for  additional information  regarding  copyright
+ * ownership.   The ASF  licenses this  file to  you under  the Apache
+ * License, Version  2.0 (the  "License"); you may  not use  this file
+ * except in  compliance with the License.   You may obtain  a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the  License is distributed on an  "AS IS" BASIS,
+ * WITHOUT  WARRANTIES OR CONDITIONS  OF ANY  KIND, either  express or
+ * implied.   See  the License  for  the  specific language  governing
+ * permissions and limitations under the License.
+ *
+ * Copyright 1994-2006 Rogue Wave Software.
+ * 
+ **************************************************************************/
+
+#include <rw/_config.h>
+
+#if defined (__IBMCPP__) && !defined (_RWSTD_NO_IMPLICIT_INCLUSION)
+// Disable implicit inclusion to work around 
+// a limitation in IBM's VisualAge 5.0.2.0 (see PR#26959) 
+
+#  define _RWSTD_NO_IMPLICIT_INCLUSION 
+#endif
+
+#include <algorithm>    // for copy, remove, remove_copy, remove_if
+#include <functional>   // for unary_function
+#include <iostream>     // for cout, endl
+#include <iterator>     // for ostream_iterator
+#include <vector>       // for vector
+
+
+//  template<class Arg>
+//  struct not_zero: public std::unary_function<Arg, bool>
+//  {
+//      bool operator() (const Arg &a) const {
+//          return a != 0;
+//      }
+//  };
+
+
+typedef std::greater<int>              int_greater;
+typedef std::binder2nd<int_greater>    bnd_greater;
+
+int main ()
+{
+    // For convenience.
+    typedef std::vector<int, std::allocator<int> >                    Vector;
+    typedef std::ostream_iterator<int, char, std::char_traits<char> > Iter;
+
+    // Populate a vector with elements from an array.
+    const Vector::value_type arr[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
+    Vector v (arr + 0, arr + sizeof arr / sizeof *arr);
+
+    // Write out the contents to cout.
+    std::copy (v.begin (), v.end (), Iter (std::cout," "));
+    std::cout << std::endl << std::endl;
+
+    // Move the 7 to the end of the vector.
+    Vector::iterator result = std::remove (v.begin (), v.end (), 7);
+
+    // Delete the 7 from the vector.
+    v.erase (result, v.end ());
+
+    std::copy (v.begin (), v.end (), Iter (std::cout, " "));
+    std::cout << std::endl << std::endl;
+
+    // Remove all non-zero elements beyond the fourth element.
+    v.erase (std::remove_if (v.begin () + 4, v.end (), 
+                             bnd_greater( int_greater (), 0 )), v.end ());
+
+    std::copy (v.begin (), v.end (), Iter (std::cout, " "));
+    std::cout << std::endl << std::endl;
+
+    // Now remove all 3s on output.
+    std::remove_copy (v.begin (), v.end (), Iter (std::cout, " "), 3);
+    std::cout << std::endl << std::endl;
+
+    // Now remove everything satisfying predicate on output.
+    std::remove_copy_if (v.begin (), v.end (), Iter (std::cout, " "),
+                         bnd_greater( int_greater (), 0 ) );
+
+    // Return 0 on success, a non-zero value on failure
+    return !!v.empty ();
+}
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