From d2a5fd169f464e9ab8c633473162edba9445599c Mon Sep 17 00:00:00 2001
From: Dave Abrahams <dave@boostpro.com>
Date: Thu, 24 Jan 2002 16:52:06 +0000
Subject: [PATCH] initial checkin

[SVN r12481]
---
 ref_test.cpp | 124 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 ref_test.cpp

diff --git a/ref_test.cpp b/ref_test.cpp
new file mode 100644
index 0000000..24f9e98
--- /dev/null
+++ b/ref_test.cpp
@@ -0,0 +1,124 @@
+#if defined(_MSC_VER) && !defined(__ICL)
+# pragma warning(disable: 4786)  // identifier truncated in debug info
+# pragma warning(disable: 4710)  // function not inlined
+# pragma warning(disable: 4711)  // function selected for automatic inline expansion
+# pragma warning(disable: 4514)  // unreferenced inline removed
+#endif
+
+#include <boost/ref.hpp>
+#include <boost/type_traits.hpp>
+#include <boost/pending/ct_if.hpp>
+
+#if defined(BOOST_MSVC) && (BOOST_MSVC < 1300)
+# pragma warning(push, 3)
+#endif
+
+#include <iostream>
+
+#if defined(BOOST_MSVC) && (BOOST_MSVC < 1300)
+# pragma warning(pop)
+#endif
+
+
+#define BOOST_INCLUDE_MAIN
+#include <boost/test/test_tools.hpp>
+
+namespace {
+using namespace boost;
+
+template <class T>
+struct wrapper
+{
+    // Used to verify implicit conversion
+    static T* get_pointer(T& x)
+    {
+        return &x;
+    }
+
+    static T const* get_const_pointer(T const& x)
+    {
+        return &x;
+    }
+
+    static void check_type_typedef(...)
+    {
+        BOOST_ERROR("expected a reference_wrapper argument");
+    }
+    
+    template <class U>
+    static void check_type_typedef(boost::reference_wrapper<U>)
+    {
+        typedef typename boost::reference_wrapper<U>::type type_typedef;
+        BOOST_TEST((boost::is_same<type_typedef,U>::value));
+    }
+    
+    template <class Arg>
+    static T* passthru(Arg x)
+    {
+        check_type_typedef(x);
+        return get_pointer(x);
+    }
+
+    template <class Arg>
+    static T const* cref_passthru(Arg x)
+    {
+        check_type_typedef(x);
+        return get_const_pointer(x);
+    }
+
+    template <class Arg>
+    static void test_unwrapped(Arg x)
+    {
+        typedef typename unwrap_reference<Arg>::type unwrapped;
+        BOOST_TEST((is_same<Arg,unwrapped>::value));
+    }
+
+    template <bool is_constant> struct select {};
+    typedef select<true> constant;
+    typedef select<false> non_constant;
+    
+    static void cref_test(T x, constant) {}
+    
+    static void cref_test(T x, non_constant)
+    {
+        BOOST_TEST(is_reference_wrapper<reference_wrapper<T const> >::value);
+        BOOST_TEST(cref_passthru(cref(x)) == &x);
+        BOOST_TEST(&cref(x).get() == &x);
+    }
+
+    BOOST_STATIC_CONSTANT(
+        bool, t_is_constant = boost::is_const<T>::value);
+
+    static void test(T x)
+    {
+        BOOST_TEST(passthru(ref(x)) == &x);
+        
+        BOOST_TEST((is_same<reference_wrapper<T>::type,T>::value));
+        
+        BOOST_TEST(&ref(x).get() == &x);
+
+        typedef reference_wrapper<T> wrapped;
+        BOOST_TEST(is_reference_wrapper<wrapped>::value);
+        
+        typedef typename unwrap_reference<wrapped>::type unwrapped_wrapper;
+        BOOST_TEST((is_same<T,unwrapped_wrapper>::value));
+
+        typedef typename unwrap_reference<T>::type unwrapped_self;
+        BOOST_TEST((is_same<T,unwrapped_self>::value));
+
+        cref_test(x, select<t_is_constant>());
+    }
+};
+
+} // namespace unnamed
+
+int test_main(int, char * [])
+{
+    wrapper<int>::test(1);
+    wrapper<int const>::test(1);
+    BOOST_TEST(!is_reference_wrapper<int>::value);
+    BOOST_TEST(!is_reference_wrapper<int&>::value);
+    BOOST_TEST(!is_reference_wrapper<int const>::value);
+    BOOST_TEST(!is_reference_wrapper<int const&>::value);
+    return 0;
+}