libcxx/test/std/iterators/predef.iterators/insert.iterators/insert.iterator/types.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <iterator>

// insert_iterator

// Test nested types and data members:

// template <InsertionContainer Cont>
// class insert_iterator {
// protected:
//   Cont* container;
//   Cont::iterator iter;
// public:
//   typedef Cont                   container_type;
//   typedef void                   value_type;
//   typedef void                   difference_type;
//   typedef insert_iterator<Cont>& reference;
//   typedef void                   pointer;
// };

#include <iterator>
#include <type_traits>
#include <vector>

template <class C>
struct find_members
    : private std::insert_iterator<C>
{
    explicit find_members(C& c) : std::insert_iterator<C>(c, c.begin()) {}
    void test()
    {
        this->container = 0;
        (void)(this->iter == this->iter);
    }
};

template <class C>
void
test()
{
    typedef std::insert_iterator<C> R;
    C c;
    find_members<C> q(c);
    q.test();
    static_assert((std::is_same<typename R::container_type, C>::value), "");
    static_assert((std::is_same<typename R::value_type, void>::value), "");
    static_assert((std::is_same<typename R::difference_type, void>::value), "");
    static_assert((std::is_same<typename R::reference, R&>::value), "");
    static_assert((std::is_same<typename R::pointer, void>::value), "");
    static_assert((std::is_same<typename R::iterator_category, std::output_iterator_tag>::value), "");
}

int main()
{
    test<std::vector<int> >();
}