Merge to master for 1.59.0 release

Use ! operator directly rather than boost::mpl::not with Boost supported...
Please watch the test results, and remind me to merge to master if the tests remain clean

doc/Jamfile.v2

@@ -3,7 +3,7 @@
 #   Distributed under 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)
-project boost/doc ;
+project function/doc ;
 import boostbook : boostbook ;
 
 boostbook function-doc 

doc/history.xml

@@ -13,6 +13,15 @@
 
 <itemizedlist spacing="compact">
 
+  <listitem><para><bold>Version 1.52.0</bold>: </para>
+    <itemizedlist spacing="compact">
+      <listitem><para>Move constructors and move assignment 
+      operators added (only for compilers with C++11 rvalue 
+      references support). Original patch
+      contributed by Antony Polukhin.</para></listitem>
+    </itemizedlist>
+  </listitem>
+
   <listitem><para><bold>Version 1.37.0</bold>: </para>
     <itemizedlist spacing="compact">
       <listitem><para>Improved the performance of Boost.Function's

doc/reference.xml

@@ -58,7 +58,7 @@
       <para>A function object <code>f</code> of
       type <code>F</code> is
       <emphasis>stateless</emphasis> if it is a function pointer or if
-      <code><classname>boost::is_stateless</classname>&lt;T&gt;</code>
+      <code><classname>boost::is_stateless</classname>&lt;F&gt;</code>
       is true. The construction of or copy to a Boost.Function object
       from a stateless function object will not cause exceptions to be
       thrown and will not allocate any storage.
@@ -203,6 +203,15 @@
       <throws><simpara>Will not throw unless copying the target of <code>f</code> throws.</simpara></throws>
     </constructor>
 
+    <constructor>
+      <parameter name="f">
+        <paramtype><classname>functionN</classname>&amp;&amp;</paramtype>
+      </parameter>
+      <requires><simpara>C++11 compatible compiler.</simpara></requires>
+      <postconditions><simpara>Moves the value from <code>f</code> to <code>*this</code>. If the argument has its function object allocated on the heap, its buffer will be assigned to <code>*this</code> leaving argument empty.</simpara></postconditions>
+      <throws><simpara>Will not throw unless argument has its function object allocated not on the heap and copying the target of <code>f</code> throws.</simpara></throws>
+    </constructor>
+    
     <constructor>
       <template>
         <template-type-parameter name="F"/>
@@ -237,6 +246,15 @@
       <postconditions><simpara>If copy construction does not throw, <code>*this</code> targets a copy of <code>f</code>'s target, if it has one, or is empty if <code>f.<methodname>empty</methodname>()</code>. If copy construction does throw, <code>this-&gt;<methodname>empty</methodname>()</code>.</simpara></postconditions>
     </copy-assignment>
     
+    <copy-assignment>
+      <parameter name="f">
+        <paramtype><classname>functionN</classname>&amp;&amp;</paramtype>
+      </parameter>
+      <requires><simpara>C++11 compatible compiler.</simpara></requires>
+      <postconditions><simpara>Moves the value from <code>f</code> to <code>*this</code>. If the argument has its function object allocated on the heap, its buffer will be assigned to <code>*this</code> leaving argument empty.</simpara></postconditions>
+      <throws><simpara>Will not throw unless argument has its function object allocated not on the heap and copying the target of <code>f</code> throws.</simpara></throws>
+    </copy-assignment>
+
     <method-group name="modifiers">
       <method name="swap">
         <type>void</type>
@@ -608,6 +626,15 @@
       <throws><simpara>Will not throw unless copying the target of <code>f</code> throws.</simpara></throws>
     </constructor>
         
+    <constructor>
+      <parameter name="f">
+        <paramtype><classname>functionN</classname>&amp;&amp;</paramtype>
+      </parameter>
+      <requires><simpara>C++11 compatible compiler.</simpara></requires>
+      <postconditions><simpara>Moves the value from <code>f</code> to <code>*this</code>. If the argument has its function object allocated on the heap, its buffer will be assigned to <code>*this</code> leaving argument empty.</simpara></postconditions>
+      <throws><simpara>Will not throw unless argument has its function object allocated not on the heap and copying the target of <code>f</code> throws.</simpara></throws>
+    </constructor>
+    
     <constructor>
       <parameter name="f">
         <paramtype>const <classname>function</classname>&amp;</paramtype>
@@ -616,6 +643,15 @@
       <throws><simpara>Will not throw unless copying the target of <code>f</code> throws.</simpara></throws>
     </constructor>
 
+    <constructor>
+      <parameter name="f">
+        <paramtype><classname>function</classname>&amp;&amp;</paramtype>
+      </parameter>
+      <requires><simpara>C++11 compatible compiler.</simpara></requires>
+      <postconditions><simpara>Moves the value from <code>f</code> to <code>*this</code>. If the argument has its function object allocated on the heap, its buffer will be assigned to <code>*this</code> leaving argument empty.</simpara></postconditions>
+      <throws><simpara>Will not throw unless argument has its function object allocated not on the heap and copying the target of <code>f</code> throws.</simpara></throws>
+    </constructor>
+    
     <constructor>
       <template>
         <template-type-parameter name="F"/>
@@ -645,11 +681,20 @@
 
     <copy-assignment>
       <parameter name="f">
-        <paramtype>const <classname>function</classname>&amp;</paramtype>
+        <paramtype>const <classname>functionN</classname>&amp;</paramtype>
       </parameter>
       <postconditions><simpara>If copy construction does not throw, <code>*this</code> targets a copy of <code>f</code>'s target, if it has one, or is empty if <code>f.<methodname>empty</methodname>()</code>. If copy construction does throw, <code>this-&gt;<methodname>empty</methodname>()</code>.</simpara></postconditions>
     </copy-assignment>
     
+    <copy-assignment>
+      <parameter name="f">
+        <paramtype><classname>functionN</classname>&amp;&amp;</paramtype>
+      </parameter>
+      <requires><simpara>C++11 compatible compiler.</simpara></requires>
+      <postconditions><simpara>Moves the value from <code>f</code> to <code>*this</code>. If the argument has its function object allocated on the heap, its buffer will be assigned to <code>*this</code> leaving argument empty.</simpara></postconditions>
+      <throws><simpara>Will not throw unless argument has its function object allocated not on the heap and copying the target of <code>f</code> throws.</simpara></throws>
+    </copy-assignment>
+
     <copy-assignment>
       <parameter name="f">
         <paramtype>const <classname>function</classname>&amp;</paramtype>
@@ -658,6 +703,15 @@
       <throws><simpara>Will not throw when the target of <code>f</code> is a stateless function object or a reference to the function object. If copy construction does throw, <code>this-&gt;<methodname>empty</methodname>()</code>.</simpara></throws>
     </copy-assignment>
     
+    <copy-assignment>
+      <parameter name="f">
+        <paramtype><classname>function</classname>&amp;&amp;</paramtype>
+      </parameter>
+      <requires><simpara>C++11 compatible compiler.</simpara></requires>
+      <postconditions><simpara>Moves the value from <code>f</code> to <code>*this</code>. If the argument has its function object allocated on the heap, its buffer will be assigned to <code>*this</code> leaving argument empty.</simpara></postconditions>
+      <throws><simpara>Will not throw unless argument has its function object allocated not on the heap and copying the target of <code>f</code> throws.</simpara></throws>
+    </copy-assignment>
+
     <method-group name="modifiers">
       <method name="swap">
         <type>void</type>

include/boost/function/function_base.hpp

@@ -25,7 +25,6 @@
 #include <boost/type_traits/is_integral.hpp>
 #include <boost/type_traits/is_volatile.hpp>
 #include <boost/type_traits/composite_traits.hpp>
-#include <boost/type_traits/ice.hpp>
 #include <boost/ref.hpp>
 #include <boost/mpl/if.hpp>
 #include <boost/detail/workaround.hpp>
@@ -56,7 +55,7 @@
 // need to use std::type_info::name to compare instead of operator==.
 #if defined( BOOST_NO_TYPEID )
 #  define BOOST_FUNCTION_COMPARE_TYPE_ID(X,Y) ((X)==(Y))
-#elif (defined(__GNUC__) && __GNUC__ >= 3) \
+#elif defined(__GNUC__) \
  || defined(_AIX) \
  || (   defined(__sgi) && defined(__host_mips))
 #  include <cstring>
@@ -66,25 +65,16 @@
 #  define BOOST_FUNCTION_COMPARE_TYPE_ID(X,Y) ((X)==(Y))
 #endif
 
-#if defined(BOOST_MSVC) && BOOST_MSVC <= 1300 || defined(__ICL) && __ICL <= 600 || defined(__MWERKS__) && __MWERKS__ < 0x2406 && !defined(BOOST_STRICT_CONFIG)
+#if defined(__ICL) && __ICL <= 600 || defined(__MWERKS__) && __MWERKS__ < 0x2406 && !defined(BOOST_STRICT_CONFIG)
 #  define BOOST_FUNCTION_TARGET_FIX(x) x
 #else
 #  define BOOST_FUNCTION_TARGET_FIX(x)
-#endif // not MSVC
+#endif // __ICL etc
 
-#if !BOOST_WORKAROUND(__BORLANDC__, < 0x5A0)
 #  define BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor,Type)              \
-      typename ::boost::enable_if_c<(::boost::type_traits::ice_not<          \
+      typename ::boost::enable_if_c<          \
-                            (::boost::is_integral<Functor>::value)>::value), \
+                           !(::boost::is_integral<Functor>::value), \
                            Type>::type
-#else
-// BCC doesn't recognize this depends on a template argument and complains
-// about the use of 'typename'
-#  define BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor,Type)     \
-      ::boost::enable_if_c<(::boost::type_traits::ice_not<          \
-                   (::boost::is_integral<Functor>::value)>::value), \
-                       Type>::type
-#endif
 
 namespace boost {
   namespace detail {
@@ -294,7 +284,7 @@ namespace boost {
           } else if (op == destroy_functor_tag)
             out_buffer.func_ptr = 0;
           else if (op == check_functor_type_tag) {
-            const detail::sp_typeinfo& check_type 
+            const boost::detail::sp_typeinfo& check_type
               = *out_buffer.type.type;
             if (BOOST_FUNCTION_COMPARE_TYPE_ID(check_type, BOOST_SP_TYPEID(Functor)))
               out_buffer.obj_ptr = &in_buffer.func_ptr;
@@ -661,11 +651,7 @@ public:
     }
 
   template<typename Functor>
-#if defined(BOOST_MSVC) && BOOST_WORKAROUND(BOOST_MSVC, < 1300)
-    const Functor* target( Functor * = 0 ) const
-#else
     const Functor* target() const
-#endif
     {
       if (!vtable) return 0;
 
@@ -683,11 +669,7 @@ public:
   template<typename F>
     bool contains(const F& f) const
     {
-#if defined(BOOST_MSVC) && BOOST_WORKAROUND(BOOST_MSVC, < 1300)
-      if (const F* fp = this->target( (F*)0 ))
-#else
       if (const F* fp = this->template target<F>())
-#endif
       {
         return function_equal(*fp, f);
       } else {

include/boost/function/function_fwd.hpp

@@ -19,8 +19,7 @@ namespace boost { namespace python { namespace objects {
 }}}
 #endif
 
-#if defined (BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)                    \
+#if defined(BOOST_BCB_PARTIAL_SPECIALIZATION_BUG)                         \
- || defined(BOOST_BCB_PARTIAL_SPECIALIZATION_BUG)                         \
  || !(defined(BOOST_STRICT_CONFIG) || !defined(__SUNPRO_CC) || __SUNPRO_CC > 0x540)
 #  define BOOST_FUNCTION_NO_FUNCTION_TYPE_SYNTAX
 #endif

include/boost/function/function_template.hpp

@@ -26,7 +26,13 @@
 
 #define BOOST_FUNCTION_PARMS BOOST_PP_ENUM(BOOST_FUNCTION_NUM_ARGS,BOOST_FUNCTION_PARM,BOOST_PP_EMPTY)
 
-#define BOOST_FUNCTION_ARGS BOOST_PP_ENUM_PARAMS(BOOST_FUNCTION_NUM_ARGS, a)
+#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
+#   define BOOST_FUNCTION_ARGS BOOST_PP_ENUM_PARAMS(BOOST_FUNCTION_NUM_ARGS, a)
+#else
+#   include <boost/move/utility_core.hpp>
+#   define BOOST_FUNCTION_ARG(J,I,D) ::boost::forward< BOOST_PP_CAT(T,I) >(BOOST_PP_CAT(a,I))
+#   define BOOST_FUNCTION_ARGS BOOST_PP_ENUM(BOOST_FUNCTION_NUM_ARGS,BOOST_FUNCTION_ARG,BOOST_PP_EMPTY)
+#endif
 
 #define BOOST_FUNCTION_ARG_TYPE(J,I,D) \
   typedef BOOST_PP_CAT(T,I) BOOST_PP_CAT(BOOST_PP_CAT(arg, BOOST_PP_INC(I)),_type);
@@ -677,7 +683,7 @@ namespace boost {
 
     vtable_type* get_vtable() const {
       return reinterpret_cast<vtable_type*>(
-               reinterpret_cast<std::size_t>(vtable) & ~static_cast<size_t>(0x01));
+               reinterpret_cast<std::size_t>(vtable) & ~static_cast<std::size_t>(0x01));
     }
 
     struct clear_type {};
@@ -711,9 +717,8 @@ namespace boost {
     template<typename Functor>
     BOOST_FUNCTION_FUNCTION(Functor BOOST_FUNCTION_TARGET_FIX(const &) f
 #ifndef BOOST_NO_SFINAE
-                            ,typename enable_if_c<
+                            ,typename boost::enable_if_c<
-                            (boost::type_traits::ice_not<
+                             !(is_integral<Functor>::value),
-                             (is_integral<Functor>::value)>::value),
                                         int>::type = 0
 #endif // BOOST_NO_SFINAE
                             ) :
@@ -724,9 +729,8 @@ namespace boost {
     template<typename Functor,typename Allocator>
     BOOST_FUNCTION_FUNCTION(Functor BOOST_FUNCTION_TARGET_FIX(const &) f, Allocator a
 #ifndef BOOST_NO_SFINAE
-                            ,typename enable_if_c<
+                            ,typename boost::enable_if_c<
-                            (boost::type_traits::ice_not<
+                              !(is_integral<Functor>::value),
-                             (is_integral<Functor>::value)>::value),
                                         int>::type = 0
 #endif // BOOST_NO_SFINAE
                             ) :
@@ -749,6 +753,13 @@ namespace boost {
       this->assign_to_own(f);
     }
     
+#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
+    BOOST_FUNCTION_FUNCTION(BOOST_FUNCTION_FUNCTION&& f) : function_base()
+    {
+      this->move_assign(f);
+    }
+#endif
+    
     ~BOOST_FUNCTION_FUNCTION() { clear(); }
 
     result_type operator()(BOOST_FUNCTION_PARMS) const
@@ -767,9 +778,8 @@ namespace boost {
     // construct.
     template<typename Functor>
 #ifndef BOOST_NO_SFINAE
-    typename enable_if_c<
+    typename boost::enable_if_c<
-               (boost::type_traits::ice_not<
+                  !(is_integral<Functor>::value),
-                 (is_integral<Functor>::value)>::value),
                BOOST_FUNCTION_FUNCTION&>::type
 #else
     BOOST_FUNCTION_FUNCTION&
@@ -831,6 +841,26 @@ namespace boost {
       return *this;
     }
     
+#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
+    // Move assignment from another BOOST_FUNCTION_FUNCTION
+    BOOST_FUNCTION_FUNCTION& operator=(BOOST_FUNCTION_FUNCTION&& f)
+    {
+      
+      if (&f == this)
+        return *this;
+
+      this->clear();
+      BOOST_TRY {
+        this->move_assign(f);
+      } BOOST_CATCH (...) {
+        vtable = 0;
+        BOOST_RETHROW;
+      }
+      BOOST_CATCH_END
+      return *this;
+    }
+#endif
+
     void swap(BOOST_FUNCTION_FUNCTION& other)
     {
       if (&other == this)
@@ -887,10 +917,10 @@ namespace boost {
     template<typename Functor>
     void assign_to(Functor f)
     {
-      using detail::function::vtable_base;
+      using boost::detail::function::vtable_base;
 
-      typedef typename detail::function::get_function_tag<Functor>::type tag;
+      typedef typename boost::detail::function::get_function_tag<Functor>::type tag;
-      typedef detail::function::BOOST_FUNCTION_GET_INVOKER<tag> get_invoker;
+      typedef boost::detail::function::BOOST_FUNCTION_GET_INVOKER<tag> get_invoker;
       typedef typename get_invoker::
                          template apply<Functor, R BOOST_FUNCTION_COMMA 
                         BOOST_FUNCTION_TEMPLATE_ARGS>
@@ -908,11 +938,12 @@ namespace boost {
 
       if (stored_vtable.assign_to(f, functor)) {
         std::size_t value = reinterpret_cast<std::size_t>(&stored_vtable.base);
+        // coverity[pointless_expression]: suppress coverity warnings on apparant if(const).
         if (boost::has_trivial_copy_constructor<Functor>::value &&
             boost::has_trivial_destructor<Functor>::value &&
-            detail::function::function_allows_small_object_optimization<Functor>::value)
+            boost::detail::function::function_allows_small_object_optimization<Functor>::value)
-          value |= static_cast<size_t>(0x01);
+          value |= static_cast<std::size_t>(0x01);
-        vtable = reinterpret_cast<detail::function::vtable_base *>(value);
+        vtable = reinterpret_cast<boost::detail::function::vtable_base *>(value);
       } else 
         vtable = 0;
     }
@@ -920,10 +951,10 @@ namespace boost {
     template<typename Functor,typename Allocator>
     void assign_to_a(Functor f,Allocator a)
     {
-      using detail::function::vtable_base;
+      using boost::detail::function::vtable_base;
 
-      typedef typename detail::function::get_function_tag<Functor>::type tag;
+      typedef typename boost::detail::function::get_function_tag<Functor>::type tag;
-      typedef detail::function::BOOST_FUNCTION_GET_INVOKER<tag> get_invoker;
+      typedef boost::detail::function::BOOST_FUNCTION_GET_INVOKER<tag> get_invoker;
       typedef typename get_invoker::
                          template apply_a<Functor, R BOOST_FUNCTION_COMMA 
                          BOOST_FUNCTION_TEMPLATE_ARGS,
@@ -942,11 +973,12 @@ namespace boost {
 
       if (stored_vtable.assign_to_a(f, functor, a)) { 
         std::size_t value = reinterpret_cast<std::size_t>(&stored_vtable.base);
+        // coverity[pointless_expression]: suppress coverity warnings on apparant if(const).
         if (boost::has_trivial_copy_constructor<Functor>::value &&
             boost::has_trivial_destructor<Functor>::value &&
-            detail::function::function_allows_small_object_optimization<Functor>::value)
+            boost::detail::function::function_allows_small_object_optimization<Functor>::value)
           value |= static_cast<std::size_t>(0x01);
-        vtable = reinterpret_cast<detail::function::vtable_base *>(value);
+        vtable = reinterpret_cast<boost::detail::function::vtable_base *>(value);
       } else 
         vtable = 0;
     }
@@ -1033,9 +1065,8 @@ public:
   template<typename Functor>
   function(Functor f
 #ifndef BOOST_NO_SFINAE
-           ,typename enable_if_c<
+           ,typename boost::enable_if_c<
-                            (boost::type_traits::ice_not<
+                          !(is_integral<Functor>::value),
-                          (is_integral<Functor>::value)>::value),
                        int>::type = 0
 #endif
            ) :
@@ -1045,9 +1076,8 @@ public:
   template<typename Functor,typename Allocator>
   function(Functor f, Allocator a
 #ifndef BOOST_NO_SFINAE
-           ,typename enable_if_c<
+           ,typename boost::enable_if_c<
-                            (boost::type_traits::ice_not<
+                           !(is_integral<Functor>::value),
-                          (is_integral<Functor>::value)>::value),
                        int>::type = 0
 #endif
            ) :
@@ -1063,17 +1093,30 @@ public:
 
   function(const base_type& f) : base_type(static_cast<const base_type&>(f)){}
 
+#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
+  // Move constructors
+  function(self_type&& f): base_type(static_cast<base_type&&>(f)){}
+  function(base_type&& f): base_type(static_cast<base_type&&>(f)){}
+#endif
+  
   self_type& operator=(const self_type& f)
   {
     self_type(f).swap(*this);
     return *this;
   }
 
+#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
+  self_type& operator=(self_type&& f)
+  {
+    self_type(static_cast<self_type&&>(f)).swap(*this);
+    return *this;
+  }
+#endif  
+
   template<typename Functor>
 #ifndef BOOST_NO_SFINAE
-  typename enable_if_c<
+  typename boost::enable_if_c<
-                            (boost::type_traits::ice_not<
+                         !(is_integral<Functor>::value),
-                         (is_integral<Functor>::value)>::value),
                       self_type&>::type
 #else
   self_type&
@@ -1097,6 +1140,14 @@ public:
     self_type(f).swap(*this);
     return *this;
   }
+  
+#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
+  self_type& operator=(base_type&& f)
+  {
+    self_type(static_cast<base_type&&>(f)).swap(*this);
+    return *this;
+  }
+#endif 
 };
 
 #undef BOOST_FUNCTION_PARTIAL_SPEC
@@ -1125,6 +1176,9 @@ public:
 #undef BOOST_FUNCTION_TEMPLATE_ARGS
 #undef BOOST_FUNCTION_PARMS
 #undef BOOST_FUNCTION_PARM
+#ifdef BOOST_FUNCTION_ARG
+#   undef BOOST_FUNCTION_ARG
+#endif
 #undef BOOST_FUNCTION_ARGS
 #undef BOOST_FUNCTION_ARG_TYPE
 #undef BOOST_FUNCTION_ARG_TYPES

meta/libraries.json

@@ -0,0 +1,18 @@
+{
+    "key": "function",
+    "name": "Function",
+    "authors": [
+        "Doug Gregor"
+    ],
+    "description": "Function object wrappers for deferred calls or callbacks.",
+    "std": [
+        "tr1"
+    ],
+    "category": [
+        "Function-objects",
+        "Programming"
+    ],
+    "maintainers": [
+        "Douglas Gregor <dgregor -at- cs.indiana.edu>"
+    ]
+}

test/Jamfile.v2

@@ -61,6 +61,8 @@ import testing ;
    
   [ run libs/function/test/nothrow_swap.cpp :  :  :  :  ]
 
+  [ run libs/function/test/rvalues_test.cpp :  :  :  :  ]
+
   [ compile libs/function/test/function_typeof_test.cpp ]
  ;
 }

test/function_test.cpp

@@ -690,6 +690,95 @@ static void test_call()
   test_call_cref(std::plus<int>());
 }
 
+struct big_aggregating_structure {
+  int disable_small_objects_optimizations[32];
+    
+  big_aggregating_structure()
+  {
+    ++ global_int;
+  }
+    
+  big_aggregating_structure(const big_aggregating_structure&)
+  {
+    ++ global_int;
+  }
+
+  ~big_aggregating_structure()
+  {
+    -- global_int;
+  }
+    
+  void operator()() 
+  {
+    ++ global_int;
+  }
+
+  void operator()(int) 
+  {
+    ++ global_int;
+  }
+};
+
+template <class FunctionT>
+static void test_move_semantics() 
+{
+  typedef FunctionT f1_type;
+
+  big_aggregating_structure obj;
+  
+  f1_type f1 = obj;
+  global_int = 0;
+  f1();
+  
+  BOOST_CHECK(!f1.empty());
+  BOOST_CHECK(global_int == 1);
+  
+#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
+  // Testing rvalue constructors
+  f1_type f2(static_cast<f1_type&&>(f1));
+  BOOST_CHECK(f1.empty());
+  BOOST_CHECK(!f2.empty());
+  BOOST_CHECK(global_int == 1);
+  f2();
+  BOOST_CHECK(global_int == 2);
+  
+  f1_type f3(static_cast<f1_type&&>(f2));
+  BOOST_CHECK(f1.empty());
+  BOOST_CHECK(f2.empty());
+  BOOST_CHECK(!f3.empty());
+  BOOST_CHECK(global_int == 2);
+  f3();
+  BOOST_CHECK(global_int == 3);
+    
+  // Testing move assignment
+  f1_type f4;
+  BOOST_CHECK(f4.empty());
+  f4 = static_cast<f1_type&&>(f3);
+  BOOST_CHECK(f1.empty());
+  BOOST_CHECK(f2.empty());
+  BOOST_CHECK(f3.empty());
+  BOOST_CHECK(!f4.empty());
+  BOOST_CHECK(global_int == 3);
+  f4();
+  BOOST_CHECK(global_int == 4);
+  
+  // Testing self move assignment
+  f4 = static_cast<f1_type&&>(f4);
+  BOOST_CHECK(!f4.empty());
+  BOOST_CHECK(global_int == 4);
+
+  // Testing, that no memory leaked when assigning to nonempty function
+  f4 = obj;
+  BOOST_CHECK(!f4.empty());
+  BOOST_CHECK(global_int == 4);
+  f1_type f5 = obj;
+  BOOST_CHECK(global_int == 5);
+  f4 = static_cast<f1_type&&>(f5);
+  BOOST_CHECK(global_int == 4);
+  
+#endif  
+}
+
 int test_main(int, char* [])
 {
   test_zero_args();
@@ -702,6 +791,8 @@ int test_main(int, char* [])
   test_exception();
   test_implicit();
   test_call();
+  test_move_semantics<function<void()> >();
+  test_move_semantics<boost::function0<void> >();
 
   return 0;
 }

test/mem_fun_cxx98.cpp

@@ -14,24 +14,32 @@
 #include <iostream>
 #include <functional>
 
+struct Y {
+    Y(int y = 0) : y_(y) {}
+    bool operator==(const Y& rhs) { return y_ == rhs.y_; }
+private:
+    int y_;
+    };
+
 struct X {
   int foo(int);
-  std::ostream& foo2(std::ostream&) const;
+  Y& foo2(Y&) const;
 };
 int X::foo(int x) { return -x; }
-std::ostream& X::foo2(std::ostream& x) const { return x; }
+Y& X::foo2(Y& x) const { return x; }
 
 int main()
 {
     boost::function<int (X*, int)> f;
-    boost::function<std::ostream& (X*, std::ostream&)> f2;
+    boost::function<Y& (X*, Y&)> f2;
+	Y y1;
 	
     f = &X::foo;
     f2 = &X::foo2;
 
     X x;
     BOOST_TEST(f(&x, 5) == -5);
-    BOOST_TEST(f2(&x, boost::ref(std::cout)) == std::cout);
+    BOOST_TEST(f2(&x, boost::ref(y1)) == y1);
 
     return ::boost::report_errors();
 }

test/mem_fun_portable.cpp

@@ -14,24 +14,32 @@
 #include <iostream>
 #include <functional>
 
+struct Y {
+    Y(int y = 0) : y_(y) {}
+    bool operator==(const Y& rhs) { return y_ == rhs.y_; }
+private:
+    int y_;
+    };
+
 struct X {
   int foo(int);
-  std::ostream& foo2(std::ostream&) const;
+  Y& foo2(Y&) const;
 };
 int X::foo(int x) { return -x; }
-std::ostream& X::foo2(std::ostream& x) const { return x; }
+Y& X::foo2(Y& x) const { return x; }
 
 int main()
 {
     boost::function2<int, X*, int> f;
-    boost::function2<std::ostream&, X*, std::ostream&> f2;
+    boost::function2<Y&, X*, Y&> f2;
+    Y y1;
     
     f = &X::foo;
     f2 = &X::foo2;
 
     X x;
     BOOST_TEST(f(&x, 5) == -5);
-    BOOST_TEST(f2(&x, boost::ref(std::cout)) == std::cout);
+    BOOST_TEST(f2(&x, boost::ref(y1)) == y1);
 
     return ::boost::report_errors();
 }

test/rvalues_test.cpp

@@ -0,0 +1,106 @@
+// Copyright 2014 Antony Polukhin.
+//
+// Distributed under 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)
+
+// For more information, see http://www.boost.org
+
+#include <iostream>
+#include <cstdlib>
+
+#include <boost/test/minimal.hpp>
+#include <boost/function.hpp>
+#include <boost/move/move.hpp>
+
+class only_movable {
+private:
+    BOOST_MOVABLE_BUT_NOT_COPYABLE(only_movable)
+    int value_;
+    bool moved_;
+
+public:
+    only_movable(BOOST_RV_REF(only_movable) x)
+        : value_(x.value_)
+        , moved_(false)
+    {
+        x.moved_ = true;
+    }
+
+   only_movable& operator=(BOOST_RV_REF(only_movable) x) {
+        value_ = x.value_;
+        x.moved_ = true;
+        moved_ = false;
+        return *this;
+   }
+
+    explicit only_movable(int value = 0) : value_(value), moved_(false) {}
+    int get_value() const {  return value_;  }
+    bool is_moved() const { return moved_; }
+};
+
+
+int one(BOOST_RV_REF(only_movable) v) { return v.get_value(); }
+only_movable two(BOOST_RV_REF(only_movable) t) {
+    only_movable t1 = boost::move(t);
+    return BOOST_MOVE_RET(only_movable, t1);
+}
+
+only_movable two_sum(BOOST_RV_REF(only_movable) t1, BOOST_RV_REF(only_movable) t2) {
+    only_movable ret(t1.get_value() + t2.get_value());
+    return BOOST_MOVE_RET(only_movable, ret);
+}
+
+struct sum_struct {
+    only_movable operator()(BOOST_RV_REF(only_movable) t1, BOOST_RV_REF(only_movable) t2) const {
+        only_movable ret(t1.get_value() + t2.get_value());
+        return BOOST_MOVE_RET(only_movable, ret);
+    }
+};
+
+#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
+int three(std::string&&) { return 1; }
+std::string&& four(std::string&& s) { return boost::move(s); }
+#endif
+
+int test_main(int, char*[])
+{
+    using boost::function;
+
+    function <int(BOOST_RV_REF(only_movable))>  f1 = one;
+
+    only_movable om1(1);
+    BOOST_CHECK(f1(boost::move(om1)) == 1);
+
+    function <only_movable(BOOST_RV_REF(only_movable))>  f2 = two;
+
+    only_movable om2(2);
+    only_movable om2_2 = f2(boost::move(om2));
+    BOOST_CHECK(om2_2.get_value() == 2);
+    BOOST_CHECK(om2.is_moved());
+
+    {
+        function <only_movable(BOOST_RV_REF(only_movable), BOOST_RV_REF(only_movable))>  f2_sum = two_sum;
+        only_movable om1_sum(1), om2_sum(2);
+        only_movable om2_sum_2 = f2_sum(boost::move(om1_sum), boost::move(om2_sum));
+        BOOST_CHECK(om2_sum_2.get_value() == 3);
+    }
+
+    {
+        sum_struct s;
+        function <only_movable(BOOST_RV_REF(only_movable), BOOST_RV_REF(only_movable))>  f2_sum = s;
+        only_movable om1_sum(1), om2_sum(2);
+        only_movable om2_sum_2 = f2_sum(boost::move(om1_sum), boost::move(om2_sum));
+        BOOST_CHECK(om2_sum_2.get_value() == 3);
+    }
+
+#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
+    function <int(std::string&&)>               f3 = three;
+    function <std::string&& (std::string&& s)>  f4 = four;
+
+    f3(std::string("Hello"));
+    BOOST_CHECK(f4(std::string("world")) == "world");
+#endif
+
+    return 0;
+}