@@ -4125,6 +4125,8 @@ parse_using_directive (tree name_space, tree attribs)
tree name = get_attribute_name (a);
if (is_attribute_p ("strong", name))
{
+ warning (OPT_Wdeprecated, "strong using is deprecated; use inline "
+ "namespaces instead");
if (!toplevel_bindings_p ())
error ("strong using only meaningful at namespace scope");
else if (name_space != error_mark_node)
@@ -21802,7 +21802,6 @@ Predefined Macros,cpp,The GNU C Preprocessor}).
method denoted by a @samp{->*} or @samp{.*} expression.
* C++ Attributes:: Variable, function, and type attributes for C++ only.
* Function Multiversioning:: Declaring multiple function versions.
-* Namespace Association:: Strong using-directives for namespace association.
* Type Traits:: Compiler support for type traits.
* C++ Concepts:: Improved support for generic programming.
* Deprecated Features:: Things will disappear from G++.
@@ -22368,8 +22367,6 @@ does not have constructors or destructors.
@end table
-See also @ref{Namespace Association}.
-
@node Function Multiversioning
@section Function Multiversioning
@cindex function versions
@@ -22428,51 +22425,6 @@ dispatching to call the right version at runtime. Refer to the
@uref{http://gcc.gnu.org/wiki/FunctionMultiVersioning, GCC wiki on
Function Multiversioning} for more details.
-@node Namespace Association
-@section Namespace Association
-
-@strong{Caution:} The semantics of this extension are equivalent
-to C++ 2011 inline namespaces. Users should use inline namespaces
-instead as this extension will be removed in future versions of G++.
-
-A using-directive with @code{__attribute ((strong))} is stronger
-than a normal using-directive in two ways:
-
-@itemize @bullet
-@item
-Templates from the used namespace can be specialized and explicitly
-instantiated as though they were members of the using namespace.
-
-@item
-The using namespace is considered an associated namespace of all
-templates in the used namespace for purposes of argument-dependent
-name lookup.
-@end itemize
-
-The used namespace must be nested within the using namespace so that
-normal unqualified lookup works properly.
-
-This is useful for composing a namespace transparently from
-implementation namespaces. For example:
-
-@smallexample
-namespace std @{
- namespace debug @{
- template <class T> struct A @{ @};
- @}
- using namespace debug __attribute ((__strong__));
- template <> struct A<int> @{ @}; // @r{OK to specialize}
-
- template <class T> void f (A<T>);
-@}
-
-int main()
-@{
- f (std::A<float>()); // @r{lookup finds} std::f
- f (std::A<int>());
-@}
-@end smallexample
-
@node Type Traits
@section Type Traits
similarity index 100%
rename from gcc/testsuite/g++.dg/lookup/strong-using-1.C
rename to gcc/testsuite/g++.dg/cpp0x/inline-ns6.C
similarity index 100%
rename from gcc/testsuite/g++.dg/lookup/strong-using-2.C
rename to gcc/testsuite/g++.dg/cpp0x/inline-ns7.C
similarity index 100%
rename from gcc/testsuite/g++.dg/lookup/strong-using-3.C
rename to gcc/testsuite/g++.dg/cpp0x/inline-ns8.C
similarity index 100%
rename from gcc/testsuite/g++.dg/lookup/strong-using-5.C
rename to gcc/testsuite/g++.dg/cpp0x/inline-ns9.C
deleted file mode 100644
@@ -1,8 +0,0 @@
-// PR c++/16301
-
-// { dg-do compile }
-
-namespace NS2
-{
- using namespace NS1 __attribute__ ((strong)); // { dg-error "" }
-}
@@ -250,7 +250,6 @@ namespace std
};
} // namespace __cxx1998
- // namespace __debug __attribute__ ((strong));
inline namespace __debug { }
}
</pre></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a id="methods.coexistence.link"></a>Link- and run-time coexistence of release- and
@@ -656,7 +656,6 @@ namespace std
};
} // namespace __cxx1998
- // namespace __debug __attribute__ ((strong));
inline namespace __debug { }
}
</programlisting>