| // (C) Copyright John Maddock 2001. |
| // Use, modification and distribution are subject to the |
| // Boost Software License, Version 1.0. (See accompanying file |
| // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| |
| // See http://www.boost.org/libs/config for most recent version. |
| |
| // MACRO: BOOST_NO_DEPENDENT_NESTED_DERIVATIONS |
| // TITLE: dependent nested template classes |
| // DESCRIPTION: The compiler fails to compile |
| // a nested class that has a dependent base class: |
| // template<typename T> |
| // struct foo : { |
| // template<typename U> |
| // struct bar : public U {}; |
| // }; |
| #ifndef BOOST_NESTED_TEMPLATE |
| #define BOOST_NESTED_TEMPLATE template |
| #endif |
| |
| |
| namespace boost_no_dependent_nested_derivations{ |
| |
| struct UDT1{}; |
| struct UDT2{}; |
| |
| template<typename T> |
| struct foo |
| { |
| template<typename U> |
| struct bar : public foo<U> |
| {}; |
| }; |
| |
| template <class T> |
| void foo_test(T) |
| { |
| typedef foo<T> foo_type; |
| typedef typename foo_type::BOOST_NESTED_TEMPLATE bar<UDT2> bar_type; |
| foo<T> ft; |
| bar_type bt; |
| (void) &bt; |
| (void) &ft; |
| } |
| |
| int test() |
| { |
| foo_test(UDT1()); |
| return 0; |
| } |
| |
| } |
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