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

   1 //  (C) Copyright John Maddock 2001.
   2 //  Use, modification and distribution are subject to the
   3 //  Boost Software License, Version 1.0. (See accompanying file
   4 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 //  See http://www.boost.org/libs/config for most recent version.
   7
   8 //  MACRO:         BOOST_NO_DEPENDENT_NESTED_DERIVATIONS
   9 //  TITLE:         dependent nested template classes
  10 //  DESCRIPTION:   The compiler fails to compile
  11 //                 a nested class that has a dependent base class:
  12 //                 template<typename T>
  13 //                 struct foo : {
  14 //                    template<typename U>
  15 //                    struct bar : public U {};
  16 //                 };
  17 #ifndef BOOST_NESTED_TEMPLATE
  18 #define BOOST_NESTED_TEMPLATE template
  19 #endif
  20
  21
  22 namespace boost_no_dependent_nested_derivations{
  23
  24 struct UDT1{};
  25 struct UDT2{};
  26
  27 template<typename T>
  28 struct foo
  29 {
  30   template<typename U>
  31   struct bar : public foo<U>
  32   {};
  33 };
  34
  35 template <class T>
  36 void foo_test(T)
  37 {
  38    typedef foo<T> foo_type;
  39    typedef typename foo_type::BOOST_NESTED_TEMPLATE bar<UDT2> bar_type;
  40    foo<T> ft;
  41    bar_type bt;
  42    (void) &bt;
  43    (void) &ft;
  44 }
  45
  46 int test()
  47 {
  48    foo_test(UDT1());
  49    return 0;
  50 }
  51
  52 }
  53
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