added test showing what polyallocator shall be able to do

[[Imported from SVN: r5956]]

dune/common/test/.gitignore

@@ -16,6 +16,7 @@ sllisttest
 tuplestest
 settest
 fmatrixtest
+polyallocator
 poolallocatortest
 *.gcda
 *.gcno

dune/common/test/Makefile.am

@@ -22,6 +22,7 @@ TESTPROGS = \
     mpicollcomm \
     mpiguard \
     nullptr-test \
+    polyallocator \
 	poolallocatortest \
     settest \
     shared_ptrtest \
@@ -101,6 +102,8 @@ fvectortest_SOURCES = fvectortest.cc
 
 fmatrixtest_SOURCES = fmatrixtest.cc
 
+polyallocator_SOURCES = polyallocator.cc
+
 poolallocatortest_SOURCES = poolallocatortest.cc
 
 settest_SOURCES=settest.cc

dune/common/test/polyallocator.cc

+// -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+// vi: set et ts=4 sw=2 sts=2:
+#include <config.h>
+
+#include <iostream>
+
+#include <dune/common/polyallocator.hh>
+
+struct A
+{
+  virtual ~A () {}
+  virtual void test ( int i ) = 0;
+};
+
+
+struct B
+  : public A
+{
+  B( int i ) : k( i ) {}
+
+  void test ( int i )
+  {
+    std::cout << "B( " << k << " ).test( " << i << " )" << std::endl;
+  }
+
+  int k;
+};
+
+
+struct C
+  : public A
+{
+  void test ( int i )
+  {
+    std::cout << "C.test( " << i << " )" << std::endl;
+  }
+};
+
+
+A *create ( int argc, char **argv, Dune::PolyAllocator &allocator )
+{
+  if( argc > 1 )
+  {
+    B *b = allocator.allocate< B >();
+    allocator.construct( b, B( atoi( argv[ 1 ] ) ) );
+    return b;
+  }
+  else
+  {
+    C *c = allocator.allocate< C >();
+    allocator.construct( c, C() );
+    return c;
+  }
+}
+
+
+int main ( int argc, char **argv )
+{
+  Dune::PolyAllocator allocator;
+  A *a = create( argc, argv, allocator );
+
+  a->test( 2 );
+
+  allocator.destroy( a );
+  allocator.deallocate( a );
+
+  return 0;
+}