ceph/src/boost/libs/config/test/boost_has_nrvo.ipp

   1 //  (C) Copyright Terje Slettebo 2001.
   2 //  (C) Copyright John Maddock 2001.
   3 //  Use, modification and distribution are subject to the
   4 //  Boost Software License, Version 1.0. (See accompanying file
   5 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6
   7 //  See http://www.boost.org/libs/config for most recent version.
   8
   9 //  MACRO:         BOOST_HAS_NRVO
  10 //  TITLE:         Named return value optimisation.
  11 //  DESCRIPTION:   Named return value optimisation.
  12
  13
  14 namespace boost_has_nrvo
  15 {
  16
  17 class test_class
  18 {
  19 public:
  20   test_class() {}
  21   test_class(const test_class&)
  22   {
  23     ++copy_count;
  24   }
  25
  26   static int copy_count;
  27 };
  28
  29 int test_class::copy_count;
  30
  31 test_class f()
  32 {
  33   test_class nrv;
  34
  35   return nrv;
  36 }
  37
  38 int test()
  39 {
  40   test_class::copy_count=0;
  41
  42   f();
  43
  44   return test_class::copy_count;
  45 }
  46
  47 } // namespace boost_has_nrvo
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