stl_map.h (map()): Make default.

2016-10-26  François Dumont  <fdumont@gcc.gnu.org>

	* include/bits/stl_map.h (map()): Make default.
	* include/bits/stl_multimap.h (multimap()): Likewise.
	* include/bits/stl_multiset.h (multiset()): Likewise.
	* include/bits/stl_set.h (set()): Likewise.
	* include/bits/stl_tree.h (_Rb_tree_impl()): Add conditional noexcept.
	(_Rb_tree()): Make default.

From-SVN: r241601

libstdc++-v3/ChangeLog

+2016-10-26  François Dumont  <fdumont@gcc.gnu.org>
+
+	* include/bits/stl_map.h (map()): Make default.
+	* include/bits/stl_multimap.h (multimap()): Likewise.
+	* include/bits/stl_multiset.h (multiset()): Likewise.
+	* include/bits/stl_set.h (set()): Likewise.
+	* include/bits/stl_tree.h (_Rb_tree_impl()): Add conditional noexcept.
+	(_Rb_tree()): Make default.
+
 2016-10-26  Bernd Edlinger  <bernd.edlinger@hotmail.de>
 
 	PR libstdc++/78110

libstdc++-v3/include/bits/stl_map.h

@@ -167,11 +167,11 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
       /**
        *  @brief  Default constructor creates no elements.
        */
-      map()
-      _GLIBCXX_NOEXCEPT_IF(
-	  is_nothrow_default_constructible<allocator_type>::value
-	  && is_nothrow_default_constructible<key_compare>::value)
-      : _M_t() { }
+#if __cplusplus < 201103L
+      map() : _M_t() { }
+#else
+      map() = default;
+#endif
 
       /**
        *  @brief  Creates a %map with no elements.

libstdc++-v3/include/bits/stl_multimap.h

@@ -164,11 +164,11 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
       /**
        *  @brief  Default constructor creates no elements.
        */
-      multimap()
-      _GLIBCXX_NOEXCEPT_IF(
-	  is_nothrow_default_constructible<allocator_type>::value
-	  && is_nothrow_default_constructible<key_compare>::value)
-      : _M_t() { }
+#if __cplusplus < 201103L
+      multimap() : _M_t() { }
+#else
+      multimap() = default;
+#endif
 
       /**
        *  @brief  Creates a %multimap with no elements.

libstdc++-v3/include/bits/stl_multiset.h

@@ -144,11 +144,11 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
       /**
        *  @brief  Default constructor creates no elements.
        */
-      multiset()
-      _GLIBCXX_NOEXCEPT_IF(
-	  is_nothrow_default_constructible<allocator_type>::value
-	  && is_nothrow_default_constructible<key_compare>::value)
-      : _M_t() { }
+#if __cplusplus < 201103L
+      multiset() : _M_t() { }
+#else
+      multiset() = default;
+#endif
 
       /**
        *  @brief  Creates a %multiset with no elements.

libstdc++-v3/include/bits/stl_set.h

@@ -147,11 +147,11 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
       /**
        *  @brief  Default constructor creates no elements.
        */
-      set()
-      _GLIBCXX_NOEXCEPT_IF(
-	  is_nothrow_default_constructible<allocator_type>::value
-	  && is_nothrow_default_constructible<key_compare>::value)
-      : _M_t() { }
+#if __cplusplus < 201103L
+      set() : _M_t() { }
+#else
+      set() = default;
+#endif
 
       /**
        *  @brief  Creates a %set with no elements.

libstdc++-v3/include/bits/stl_tree.h

@@ -602,10 +602,13 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
         struct _Rb_tree_impl : public _Node_allocator
         {
 	  _Key_compare		_M_key_compare;
-	  _Rb_tree_node_base 	_M_header;
-	  size_type 		_M_node_count; // Keeps track of size of tree.
+	  _Rb_tree_node_base	_M_header;
+	  size_type		_M_node_count; // Keeps track of size of tree.
 
 	  _Rb_tree_impl()
+	  _GLIBCXX_NOEXCEPT_IF(
+	    is_nothrow_default_constructible<_Node_allocator>::value
+	    && is_nothrow_default_constructible<_Key_compare>::value)
 	  : _Node_allocator(), _M_key_compare(), _M_header(),
 	    _M_node_count(0)
 	  { _M_initialize(); }
@@ -639,7 +642,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	    this->_M_header._M_parent = 0;
 	    this->_M_header._M_left = &this->_M_header;
 	    this->_M_header._M_right = &this->_M_header;
-	  }	    
+	  }
 	};
 
       _Rb_tree_impl<_Compare> _M_impl;
@@ -831,7 +834,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
     public:
       // allocation/deallocation
+#if __cplusplus < 201103L
       _Rb_tree() { }
+#else
+      _Rb_tree() = default;
+#endif
 
       _Rb_tree(const _Compare& __comp,
 	       const allocator_type& __a = allocator_type())