Remove implicit conversion from __value_type to value_type in [unordered_][multi]map.  This fixes http://llvm.org/bugs/show_bug.cgi?id=16549

llvm-svn: 185711
diff --git a/libcxx/include/map b/libcxx/include/map
index 4107ead..953743a 100644
--- a/libcxx/include/map
+++ b/libcxx/include/map
@@ -381,7 +381,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-template <class _Key, class _Tp, class _Compare, bool = is_empty<_Compare>::value
+template <class _Key, class _CP, class _Compare, bool = is_empty<_Compare>::value
 #if __has_feature(is_final)
                                                         && !__is_final(_Compare)
 #endif
@@ -389,7 +389,6 @@
 class __map_value_compare
     : private _Compare
 {
-    typedef pair<const _Key, _Tp> _CP;
 public:
     _LIBCPP_INLINE_VISIBILITY
     __map_value_compare()
@@ -403,22 +402,20 @@
     const _Compare& key_comp() const _NOEXCEPT {return *this;}
     _LIBCPP_INLINE_VISIBILITY
     bool operator()(const _CP& __x, const _CP& __y) const
-        {return static_cast<const _Compare&>(*this)(__x.first, __y.first);}
+        {return static_cast<const _Compare&>(*this)(__x.__cc.first, __y.__cc.first);}
     _LIBCPP_INLINE_VISIBILITY
     bool operator()(const _CP& __x, const _Key& __y) const
-        {return static_cast<const _Compare&>(*this)(__x.first, __y);}
+        {return static_cast<const _Compare&>(*this)(__x.__cc.first, __y);}
     _LIBCPP_INLINE_VISIBILITY
     bool operator()(const _Key& __x, const _CP& __y) const
-        {return static_cast<const _Compare&>(*this)(__x, __y.first);}
+        {return static_cast<const _Compare&>(*this)(__x, __y.__cc.first);}
 };
 
-template <class _Key, class _Tp, class _Compare>
-class __map_value_compare<_Key, _Tp, _Compare, false>
+template <class _Key, class _CP, class _Compare>
+class __map_value_compare<_Key, _CP, _Compare, false>
 {
     _Compare comp;
 
-    typedef pair<const _Key, _Tp> _CP;
-
 public:
     _LIBCPP_INLINE_VISIBILITY
     __map_value_compare()
@@ -433,13 +430,13 @@
 
     _LIBCPP_INLINE_VISIBILITY
     bool operator()(const _CP& __x, const _CP& __y) const
-        {return comp(__x.first, __y.first);}
+        {return comp(__x.__cc.first, __y.__cc.first);}
     _LIBCPP_INLINE_VISIBILITY
     bool operator()(const _CP& __x, const _Key& __y) const
-        {return comp(__x.first, __y);}
+        {return comp(__x.__cc.first, __y);}
     _LIBCPP_INLINE_VISIBILITY
     bool operator()(const _Key& __x, const _CP& __y) const
-        {return comp(__x, __y.first);}
+        {return comp(__x, __y.__cc.first);}
 };
 
 template <class _Allocator>
@@ -688,8 +685,6 @@
             {__nc = std::move(__v.__nc); return *this;}
 
         ~__value_type() {__cc.~value_type();}
-
-        operator const value_type& () const {return __cc;}
     };
 #else
     struct __value_type
@@ -706,11 +701,9 @@
         template <class _A0, class _A1>
         __value_type(const _A0& __a0, const _A1& __a1)
             : __cc(__a0, __a1) {}
-
-        operator const value_type& () const {return __cc;}
     };
 #endif
-    typedef __map_value_compare<key_type, mapped_type, key_compare> __vc;
+    typedef __map_value_compare<key_type, __value_type, key_compare> __vc;
     typedef typename allocator_traits<allocator_type>::template
 #ifndef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
             rebind_alloc<__value_type>
@@ -1407,8 +1400,6 @@
             {__nc = std::move(__v.__nc); return *this;}
 
         ~__value_type() {__cc.~value_type();}
-
-        operator const value_type& () const {return __cc;}
     };
 #else
     struct __value_type
@@ -1425,11 +1416,9 @@
         template <class _A0, class _A1>
         __value_type(const _A0& __a0, const _A1& __a1)
             : __cc(__a0, __a1) {}
-
-        operator const value_type& () const {return __cc;}
     };
 #endif
-    typedef __map_value_compare<key_type, mapped_type, key_compare> __vc;
+    typedef __map_value_compare<key_type, __value_type, key_compare> __vc;
     typedef typename allocator_traits<allocator_type>::template
 #ifndef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
             rebind_alloc<__value_type>