Expose accidentally removed __compressed_pair constructor taking piecewise_construct_t.  This fixes http://llvm.org/bugs/show_bug.cgi?id=15918 .

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@181217 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/memory b/include/memory
index 2a8b7e6..912a43f 100644
--- a/include/memory
+++ b/include/memory
@@ -2036,6 +2036,10 @@
             return *this;
         }
 
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+
+#endif  // _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
+
 #ifndef _LIBCPP_HAS_NO_VARIADICS
 
     template <class... _Args1, class... _Args2, size_t... _I1, size_t... _I2>
@@ -2051,10 +2055,6 @@
 
 #endif  // _LIBCPP_HAS_NO_VARIADICS
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
-
-#endif  // _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
-
     _LIBCPP_INLINE_VISIBILITY _T1_reference       first() _NOEXCEPT       {return __first_;}
     _LIBCPP_INLINE_VISIBILITY _T1_const_reference first() const _NOEXCEPT {return __first_;}
 
@@ -2131,6 +2131,10 @@
             return *this;
         }
 
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+
+#endif  // _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
+
 #ifndef _LIBCPP_HAS_NO_VARIADICS
 
     template <class... _Args1, class... _Args2, size_t... _I1, size_t... _I2>
@@ -2146,10 +2150,6 @@
 
 #endif  // _LIBCPP_HAS_NO_VARIADICS
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
-
-#endif  // _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
-
     _LIBCPP_INLINE_VISIBILITY _T1_reference       first() _NOEXCEPT       {return *this;}
     _LIBCPP_INLINE_VISIBILITY _T1_const_reference first() const _NOEXCEPT {return *this;}
 
@@ -2227,6 +2227,10 @@
             return *this;
         }
 
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+
+#endif  // _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
+
 #ifndef _LIBCPP_HAS_NO_VARIADICS
 
     template <class... _Args1, class... _Args2, size_t... _I1, size_t... _I2>
@@ -2243,10 +2247,6 @@
 
 #endif  // _LIBCPP_HAS_NO_VARIADICS
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
-
-#endif  // _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
-
     _LIBCPP_INLINE_VISIBILITY _T1_reference       first() _NOEXCEPT       {return __first_;}
     _LIBCPP_INLINE_VISIBILITY _T1_const_reference first() const _NOEXCEPT {return __first_;}
 
@@ -2321,6 +2321,10 @@
             return *this;
         }
 
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+
+#endif  // _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
+
 #ifndef _LIBCPP_HAS_NO_VARIADICS
 
     template <class... _Args1, class... _Args2, size_t... _I1, size_t... _I2>
@@ -2336,10 +2340,6 @@
 
 #endif  // _LIBCPP_HAS_NO_VARIADICS
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
-
-#endif  // _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
-
     _LIBCPP_INLINE_VISIBILITY _T1_reference       first() _NOEXCEPT       {return *this;}
     _LIBCPP_INLINE_VISIBILITY _T1_const_reference first() const _NOEXCEPT {return *this;}
 
@@ -2409,6 +2409,10 @@
             return *this;
         }
 
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+
+#endif  // _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
+
 #ifndef _LIBCPP_HAS_NO_VARIADICS
 
     template <class... _Args1, class... _Args2>
@@ -2422,10 +2426,6 @@
 
 #endif  // _LIBCPP_HAS_NO_VARIADICS
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
-
-#endif  // _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
-
     _LIBCPP_INLINE_VISIBILITY _T1_reference       first() _NOEXCEPT       {return base::first();}
     _LIBCPP_INLINE_VISIBILITY _T1_const_reference first() const _NOEXCEPT {return base::first();}
 
diff --git a/test/utilities/function.objects/func.wrap/func.wrap.func/func.wrap.func.con/alloc_F.pass.cpp b/test/utilities/function.objects/func.wrap/func.wrap.func/func.wrap.func.con/alloc_F.pass.cpp
index c027ebd..8a16313 100644
--- a/test/utilities/function.objects/func.wrap/func.wrap.func/func.wrap.func.con/alloc_F.pass.cpp
+++ b/test/utilities/function.objects/func.wrap/func.wrap.func/func.wrap.func.con/alloc_F.pass.cpp
@@ -49,6 +49,11 @@
 
 int g(int) {return 0;}
 
+class Foo {
+public:
+  void bar(int k) { }
+};
+
 int main()
 {
     {
@@ -77,4 +82,9 @@
     assert(f);
     assert(f.target<int (A::*)(int) const>() != 0);
     }
+    {
+    Foo f;
+    std::function<void(int)> fun = std::bind(&Foo::bar, &f, std::placeholders::_1);
+    fun(10);
+    }
 }