Merge branch 'develop'

checks/Jamfile.v2

@@ -1,6 +1,6 @@
 #
 # *** DO NOT EDIT THIS FILE BY HAND ***
-# This file was automatically generated on Sun Feb  5 18:12:09 2017
+# This file was automatically generated on Sun Feb  5 19:09:22 2017
 #  by libs/config/tools/generate.cpp
 # Copyright John Maddock.
 # Use, modification and distribution are subject to the 
@@ -116,6 +116,7 @@ run-simple <define>TEST_BOOST_NO_CXX11_INLINE_NAMESPACES : cxx11_inline_namespac
 run-simple <define>TEST_BOOST_NO_CXX11_NON_PUBLIC_DEFAULTED_FUNCTIONS : cxx11_non_public_defaulted_functions ;
 run-simple <define>TEST_BOOST_NO_CXX11_NUMERIC_LIMITS : cxx11_numeric_limits ;
 run-simple <define>TEST_BOOST_NO_CXX11_REF_QUALIFIERS : cxx11_ref_qualifiers ;
+run-simple <define>TEST_BOOST_NO_CXX11_SFINAE_EXPR : cxx11_sfinae_expr ;
 run-simple <define>TEST_BOOST_NO_CXX11_SMART_PTR : cxx11_smart_ptr ;
 run-simple <define>TEST_BOOST_NO_CXX11_STD_ALIGN : cxx11_std_align ;
 run-simple <define>TEST_BOOST_NO_CXX11_THREAD_LOCAL : cxx11_thread_local ;

checks/test_case.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Feb  5 18:12:09 2017
+//  This file was automatically generated on Sun Feb  5 19:09:22 2017
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 
@@ -397,6 +397,10 @@ namespace test = boost_no_cxx11_numeric_limits;
 #  include "../test/boost_no_cxx11_ref_qualifiers.ipp"
 namespace test = boost_no_cxx11_ref_qualifiers;
 #endif
+#ifdef TEST_BOOST_NO_CXX11_SFINAE_EXPR
+#  include "../test/boost_no_cxx11_sfinae_expr.ipp"
+namespace test = boost_no_cxx11_sfinae_expr;
+#endif
 #ifdef TEST_BOOST_NO_CXX11_SMART_PTR
 #  include "../test/boost_no_cxx11_smart_ptr.ipp"
 namespace test = boost_no_cxx11_smart_ptr;

doc/html/boost_config/boost_macro_reference.html

@@ -517,7 +517,7 @@
                   is covered by <a href="http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#337" target="_top">Core
                   Language DR337</a>, but is not part of the current standard.
                   Fortunately most compilers that support SFINAE also support this
-                  DR.
+                  DR. See also BOOST_NO_SFINAE and BOOST_NO_SFINAE_EXPR
                 </p>
               </td>
 </tr>
@@ -864,7 +864,8 @@
 <td>
                 <p>
                   The compiler does not support the "Substitution Failure Is
-                  Not An Error" meta-programming idiom.
+                  Not An Error" meta-programming idiom. This is the lightweight
+                  pre-C++11 version of SFINAE.
                 </p>
               </td>
 </tr>
@@ -882,6 +883,8 @@
 <td>
                 <p>
                   The compiler does not support usage of SFINAE with arbitrary expressions.
+                  This is the post-C++11 SFINAE, but excludes a few specific corner
+                  cases, see also BOOST_NO_CXX11_SFINAE_EXPR.
                 </p>
               </td>
 </tr>
@@ -3073,6 +3076,22 @@
               </td>
 </tr>
 <tr>
+<td>
+                <p>
+                  <code class="computeroutput"><span class="identifier">BOOST_NO_CXX11_SFINAE_EXPR</span></code>
+                </p>
+              </td>
+<td>
+                <p>
+                  The compiler does not support usage of C++11 SFINAE with arbitrary
+                  expressions. Use this macro only if you are using all of the features
+                  of SFINAE including substitution-failure-on-private-member-access.
+                  Otherwise use BOOST_NO_SFINAE_EXPR or BOOST_NO_SFINAE which get
+                  defined for fewer compilers.
+                </p>
+              </td>
+</tr>
+<tr>
 <td>
                 <p>
                   <code class="computeroutput"><span class="identifier">BOOST_NO_CXX11_SMART_PTR</span></code>

doc/html/index.html

@@ -990,7 +990,7 @@
 </div>
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
-<td align="left"><p><small>Last revised: February 05, 2017 at 19:01:00 GMT</small></p></td>
+<td align="left"><p><small>Last revised: February 05, 2017 at 19:27:06 GMT</small></p></td>
 <td align="right"><div class="copyright-footer"></div></td>
 </tr></table>
 <hr>

doc/macro_reference.qbk

@@ -138,7 +138,7 @@ The standard library lacks `<iostream>`, `<istream>` or `<ostream>`.
 [[`BOOST_NO_IS_ABSTRACT`][Compiler][
 The C++ compiler does not support SFINAE with abstract types, this is covered
 by __CORE_LANGUAGE_DR337__, but is not part of the current standard.  Fortunately
-most compilers that support SFINAE also support this DR.
+most compilers that support SFINAE also support this DR.  See also BOOST_NO_SFINAE and BOOST_NO_SFINAE_EXPR
 ]]
 [[`BOOST_NO_LIMITS`][Standard library][
 The C++ implementation does not provide the `<limits>` header. Never check for
@@ -218,10 +218,11 @@ of an object is not supported.
 ]]
 [[`BOOST_NO_SFINAE`][Compiler][
 The compiler does not support the "Substitution Failure Is Not An Error"
-meta-programming idiom.
+meta-programming idiom.  This is the lightweight pre-C++11 version of SFINAE.
 ]]
 [[`BOOST_NO_SFINAE_EXPR`][Compiler][
-The compiler does not support usage of SFINAE with arbitrary expressions.
+The compiler does not support usage of SFINAE with arbitrary expressions.  This is the
+post-C++11 SFINAE, but excludes a few specific corner cases, see also BOOST_NO_CXX11_SFINAE_EXPR.
 ]]
 [[`BOOST_NO_STD_ALLOCATOR`][Standard library][
 The C++ standard library does not provide a standards conforming
@@ -695,6 +696,11 @@ r-value references.
 [[`BOOST_NO_CXX11_SCOPED_ENUMS`][The compiler does not support
 scoped enumerations (`enum class`). 
 ]]
+[[`BOOST_NO_CXX11_SFINAE_EXPR`][The compiler does not support
+usage of C++11 SFINAE with arbitrary expressions.  Use this macro only if you
+are using all of the features of SFINAE including substitution-failure-on-private-member-access.  
+Otherwise use BOOST_NO_SFINAE_EXPR or BOOST_NO_SFINAE which get defined for fewer compilers.
+]]
 [[`BOOST_NO_CXX11_SMART_PTR`][The standard library header <memory> has no shared_ptr and unique_ptr.]]
 [[`BOOST_NO_CXX11_STATIC_ASSERT`][The compiler does not support
 `static_assert`. 

include/boost/config/compiler/borland.hpp

@@ -185,6 +185,7 @@
 #define BOOST_NO_CXX11_RVALUE_REFERENCES
 #define BOOST_NO_CXX11_SCOPED_ENUMS
 #define BOOST_NO_SFINAE_EXPR
+#define BOOST_NO_CXX11_SFINAE_EXPR
 #define BOOST_NO_CXX11_TEMPLATE_ALIASES
 #define BOOST_NO_CXX11_UNICODE_LITERALS    // UTF-8 still not supported
 #define BOOST_NO_CXX11_VARIADIC_TEMPLATES

include/boost/config/compiler/clang.hpp

@@ -57,7 +57,7 @@
 #define BOOST_HAS_NRVO
 
 // Branch prediction hints
-#if defined(__has_builtin)
+#if !defined (__c2__) && defined(__has_builtin)
 #if __has_builtin(__builtin_expect)
 #define BOOST_LIKELY(x) __builtin_expect(x, 1)
 #define BOOST_UNLIKELY(x) __builtin_expect(x, 0)
@@ -282,6 +282,10 @@
 #  define BOOST_NO_CXX14_VARIABLE_TEMPLATES
 #endif
 
+#if __cplusplus < 201103L
+#define BOOST_NO_CXX11_SFINAE_EXPR
+#endif
+
 #if __cplusplus < 201400
 // All versions with __cplusplus above this value seem to support this:
 #  define BOOST_NO_CXX14_DIGIT_SEPARATORS

include/boost/config/compiler/codegear.hpp

@@ -112,6 +112,7 @@
 #define BOOST_NO_CXX11_RAW_LITERALS
 #define BOOST_NO_CXX11_RVALUE_REFERENCES
 #define BOOST_NO_SFINAE_EXPR
+#define BOOST_NO_CXX11_SFINAE_EXPR
 #define BOOST_NO_CXX11_TEMPLATE_ALIASES
 #define BOOST_NO_CXX11_UNICODE_LITERALS
 #define BOOST_NO_CXX11_VARIADIC_TEMPLATES

include/boost/config/compiler/common_edg.hpp

@@ -95,6 +95,7 @@
 #define BOOST_NO_CXX11_RVALUE_REFERENCES
 #define BOOST_NO_CXX11_SCOPED_ENUMS
 #define BOOST_NO_SFINAE_EXPR
+#define BOOST_NO_CXX11_SFINAE_EXPR
 #define BOOST_NO_CXX11_STATIC_ASSERT
 #define BOOST_NO_CXX11_TEMPLATE_ALIASES
 #define BOOST_NO_CXX11_UNICODE_LITERALS

include/boost/config/compiler/cray.hpp

@@ -39,6 +39,7 @@
 #define BOOST_NO_CXX11_TEMPLATE_ALIASES
 #define BOOST_NO_CXX11_STATIC_ASSERT
 #define BOOST_NO_SFINAE_EXPR
+#define BOOST_NO_CXX11_SFINAE_EXPR
 #define BOOST_NO_CXX11_SCOPED_ENUMS
 #define BOOST_NO_CXX11_RVALUE_REFERENCES
 #define BOOST_NO_CXX11_RANGE_BASED_FOR

include/boost/config/compiler/digitalmars.hpp

@@ -71,6 +71,7 @@
 #define BOOST_NO_CXX11_RVALUE_REFERENCES
 #define BOOST_NO_CXX11_SCOPED_ENUMS
 #define BOOST_NO_SFINAE_EXPR
+#define BOOST_NO_CXX11_SFINAE_EXPR
 #define BOOST_NO_CXX11_STATIC_ASSERT
 #define BOOST_NO_CXX11_TEMPLATE_ALIASES
 #define BOOST_NO_CXX11_UNICODE_LITERALS

include/boost/config/compiler/gcc.hpp

@@ -253,6 +253,7 @@
 #if (BOOST_GCC_VERSION < 40800) || !defined(BOOST_GCC_CXX11)
 #  define BOOST_NO_CXX11_ALIGNAS
 #  define BOOST_NO_CXX11_THREAD_LOCAL
+#  define BOOST_NO_CXX11_SFINAE_EXPR
 #endif
 
 // C++0x features in 4.8.1 and later

include/boost/config/compiler/gcc_xml.hpp

@@ -46,6 +46,7 @@
 #  define BOOST_NO_CXX11_HDR_INITIALIZER_LIST
 #  define BOOST_NO_CXX11_SCOPED_ENUMS
 #  define BOOST_NO_SFINAE_EXPR
+#  define BOOST_NO_CXX11_SFINAE_EXPR
 #  define BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS
 #  define BOOST_NO_CXX11_LAMBDAS
 #  define BOOST_NO_CXX11_LOCAL_CLASS_TEMPLATE_PARAMETERS

include/boost/config/compiler/hp_acc.hpp

@@ -114,6 +114,7 @@
 #define BOOST_NO_CXX11_RVALUE_REFERENCES
 #define BOOST_NO_CXX11_SCOPED_ENUMS
 #define BOOST_NO_SFINAE_EXPR
+#define BOOST_NO_CXX11_SFINAE_EXPR
 #define BOOST_NO_CXX11_STATIC_ASSERT
 #define BOOST_NO_CXX11_TEMPLATE_ALIASES
 #define BOOST_NO_CXX11_UNICODE_LITERALS

include/boost/config/compiler/intel.hpp

@@ -415,6 +415,11 @@ template<> struct assert_intrinsic_wchar_t<unsigned short> {};
 #  undef BOOST_NO_SFINAE_EXPR
 #endif
 
+// BOOST_NO_CXX11_SFINAE_EXPR
+#if (BOOST_INTEL_CXX_VERSION >= 1500) && (!defined(BOOST_INTEL_GCC_VERSION) || (BOOST_INTEL_GCC_VERSION >= 40800)) && !defined(_MSC_VER)
+#  undef BOOST_NO_CXX11_SFINAE_EXPR
+#endif
+
 // BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS
 #if (BOOST_INTEL_CXX_VERSION >= 1500) && (!defined(BOOST_INTEL_GCC_VERSION) || (BOOST_INTEL_GCC_VERSION >= 40500)) && (!defined(_MSC_VER) || (_MSC_FULL_VER >= 180020827))
 // This is available in earlier Intel releases, but breaks Multiprecision:

include/boost/config/compiler/metrowerks.hpp

@@ -113,6 +113,7 @@
 #define BOOST_NO_CXX11_RAW_LITERALS
 #define BOOST_NO_CXX11_SCOPED_ENUMS
 #define BOOST_NO_SFINAE_EXPR
+#define BOOST_NO_CXX11_SFINAE_EXPR
 #define BOOST_NO_CXX11_STATIC_ASSERT
 #define BOOST_NO_CXX11_TEMPLATE_ALIASES
 #define BOOST_NO_CXX11_UNICODE_LITERALS

include/boost/config/compiler/mpw.hpp

@@ -62,6 +62,7 @@
 #define BOOST_NO_CXX11_RVALUE_REFERENCES
 #define BOOST_NO_CXX11_SCOPED_ENUMS
 #define BOOST_NO_SFINAE_EXPR
+#define BOOST_NO_CXX11_SFINAE_EXPR
 #define BOOST_NO_CXX11_STATIC_ASSERT
 #define BOOST_NO_CXX11_TEMPLATE_ALIASES
 #define BOOST_NO_CXX11_UNICODE_LITERALS

include/boost/config/compiler/pathscale.hpp

@@ -37,6 +37,7 @@
 #  define BOOST_NO_CXX11_TEMPLATE_ALIASES
 #  define BOOST_NO_CXX11_STATIC_ASSERT
 #  define BOOST_NO_SFINAE_EXPR
+#  define BOOST_NO_CXX11_SFINAE_EXPR
 #  define BOOST_NO_CXX11_SCOPED_ENUMS
 #  define BOOST_NO_CXX11_RVALUE_REFERENCES
 #  define BOOST_NO_CXX11_RANGE_BASED_FOR

include/boost/config/compiler/pgi.hpp

@@ -88,6 +88,7 @@
 #define BOOST_NO_CXX11_RVALUE_REFERENCES
 #define BOOST_NO_CXX11_SCOPED_ENUMS
 #define BOOST_NO_SFINAE_EXPR
+#define BOOST_NO_CXX11_SFINAE_EXPR
 #define BOOST_NO_CXX11_STATIC_ASSERT
 #define BOOST_NO_SWPRINTF
 #define BOOST_NO_CXX11_TEMPLATE_ALIASES

include/boost/config/compiler/sunpro_cc.hpp

@@ -141,6 +141,7 @@
 //
 #  define BOOST_HAS_LONG_LONG
 
+#define BOOST_NO_CXX11_SFINAE_EXPR
 
 // C++ 14:
 #if !defined(__cpp_aggregate_nsdmi) || (__cpp_aggregate_nsdmi < 201304)

include/boost/config/compiler/vacpp.hpp

@@ -114,6 +114,7 @@
 #  define BOOST_NO_CXX11_SCOPED_ENUMS
 #endif
 #define BOOST_NO_SFINAE_EXPR
+#define BOOST_NO_CXX11_SFINAE_EXPR
 #define BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX
 #if ! __IBMCPP_STATIC_ASSERT
 #  define BOOST_NO_CXX11_STATIC_ASSERT

include/boost/config/compiler/visualc.hpp

@@ -217,6 +217,7 @@
 // C++ 11:
 //
 #define BOOST_NO_TWO_PHASE_NAME_LOOKUP
+#define BOOST_NO_CXX11_SFINAE_EXPR
 
 //
 // Things that don't work in clr mode:

test/all/Jamfile.v2

@@ -1,7 +1,7 @@
 #
 # Regression test Jamfile for boost configuration setup.
 # *** DO NOT EDIT THIS FILE BY HAND ***
-# This file was automatically generated on Sun Feb  5 18:12:09 2017
+# This file was automatically generated on Sun Feb  5 19:09:22 2017
 #  by libs/config/tools/generate.cpp
 # Copyright John Maddock.
 # Use, modification and distribution are subject to the 
@@ -313,6 +313,9 @@ test-suite "BOOST_NO_CXX11_NUMERIC_LIMITS" :
 test-suite "BOOST_NO_CXX11_REF_QUALIFIERS" : 
 [ run ../no_cxx11_ref_qualifiers_pass.cpp ]
 [ compile-fail ../no_cxx11_ref_qualifiers_fail.cpp ] ;
+test-suite "BOOST_NO_CXX11_SFINAE_EXPR" : 
+[ run ../no_cxx11_sfinae_expr_pass.cpp ]
+[ compile-fail ../no_cxx11_sfinae_expr_fail.cpp ] ;
 test-suite "BOOST_NO_CXX11_SMART_PTR" : 
 [ run ../no_cxx11_smart_ptr_pass.cpp ]
 [ compile-fail ../no_cxx11_smart_ptr_fail.cpp ] ;

test/boost_no_cxx11_sfinae_expr.ipp

@@ -0,0 +1,46 @@
+/*
+Copyright 2017 Glen Joseph Fernandes
+(glenjofe@gmail.com)
+
+Distributed under Boost Software License, Version 1.0.
+(See accompanying file LICENSE_1_0.txt or copy at
+http://www.boost.org/LICENSE_1_0.txt)
+*/
+
+// MACRO: BOOST_NO_CXX11_SFINAE_EXPR
+// TITLE: C++11 SFINAE for expressions
+// DESCRIPTION: C++11 SFINAE for expressions not supported.
+
+namespace boost_no_cxx11_sfinae_expr {
+
+template<class>
+struct ignore {
+    typedef void type;
+};
+
+template<class T>
+T& object();
+
+template<class T, class E = void>
+struct trait {
+    static const int value = 0;
+};
+
+template<class T>
+struct trait<T, typename ignore<decltype(&object<T>())>::type> { };
+
+template<class T>
+struct result {
+    static const int value = T::value;
+};
+
+class type {
+    void operator&() const { }
+};
+
+int test()
+{
+    return result<trait<type> >::value;
+}
+
+} /* boost_no_cxx11_sfinae_expr */

test/config_info.cpp

@@ -1053,6 +1053,7 @@ void print_boost_macros()
    PRINT_MACRO(BOOST_NO_CXX11_REF_QUALIFIERS);
    PRINT_MACRO(BOOST_NO_CXX11_RVALUE_REFERENCES);
    PRINT_MACRO(BOOST_NO_CXX11_SCOPED_ENUMS);
+   PRINT_MACRO(BOOST_NO_CXX11_SFINAE_EXPR);
    PRINT_MACRO(BOOST_NO_CXX11_SMART_PTR);
    PRINT_MACRO(BOOST_NO_CXX11_STATIC_ASSERT);
    PRINT_MACRO(BOOST_NO_CXX11_STD_ALIGN);
@@ -1151,6 +1152,7 @@ void print_boost_macros()
 
 
 
+
    // END GENERATED BLOCK
 
    PRINT_MACRO(BOOST_INTEL);

test/config_test.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Feb  5 18:12:09 2017
+//  This file was automatically generated on Sun Feb  5 19:09:22 2017
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 
@@ -242,6 +242,11 @@ namespace boost_no_cxx11_numeric_limits = empty_boost;
 #else
 namespace boost_no_cxx11_ref_qualifiers = empty_boost;
 #endif
+#ifndef BOOST_NO_CXX11_SFINAE_EXPR
+#include "boost_no_cxx11_sfinae_expr.ipp"
+#else
+namespace boost_no_cxx11_sfinae_expr = empty_boost;
+#endif
 #ifndef BOOST_NO_CXX11_SMART_PTR
 #include "boost_no_cxx11_smart_ptr.ipp"
 #else
@@ -1506,6 +1511,11 @@ int main( int, char *[] )
       std::cerr << "Failed test for BOOST_NO_CXX11_REF_QUALIFIERS at: " << __FILE__ << ":" << __LINE__ << std::endl;
       ++error_count;
    }
+   if(0 != boost_no_cxx11_sfinae_expr::test())
+   {
+      std::cerr << "Failed test for BOOST_NO_CXX11_SFINAE_EXPR at: " << __FILE__ << ":" << __LINE__ << std::endl;
+      ++error_count;
+   }
    if(0 != boost_no_cxx11_smart_ptr::test())
    {
       std::cerr << "Failed test for BOOST_NO_CXX11_SMART_PTR at: " << __FILE__ << ":" << __LINE__ << std::endl;

test/no_cxx11_sfinae_expr_fail.cpp

@@ -0,0 +1,37 @@
+//  This file was automatically generated on Sat Feb  4 00:49:07 2017
+//  by libs/config/tools/generate.cpp
+//  Copyright John Maddock 2002-4.
+//  Use, modification and distribution are subject to 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)
+
+//  See http://www.boost.org/libs/config for the most recent version.//
+//  Revision $Id$
+//
+
+
+// Test file for macro BOOST_NO_CXX11_SFINAE_EXPR
+// This file should not compile, if it does then
+// BOOST_NO_CXX11_SFINAE_EXPR should not be defined.
+// See file boost_no_cxx11_sfinae_expr.ipp for details
+
+// Must not have BOOST_ASSERT_CONFIG set; it defeats
+// the objective of this file:
+#ifdef BOOST_ASSERT_CONFIG
+#  undef BOOST_ASSERT_CONFIG
+#endif
+
+#include <boost/config.hpp>
+#include "test.hpp"
+
+#ifdef BOOST_NO_CXX11_SFINAE_EXPR
+#include "boost_no_cxx11_sfinae_expr.ipp"
+#else
+#error "this file should not compile"
+#endif
+
+int main( int, char *[] )
+{
+   return boost_no_cxx11_sfinae_expr::test();
+}
+

test/no_cxx11_sfinae_expr_pass.cpp

@@ -0,0 +1,37 @@
+//  This file was automatically generated on Sat Feb  4 00:49:07 2017
+//  by libs/config/tools/generate.cpp
+//  Copyright John Maddock 2002-4.
+//  Use, modification and distribution are subject to 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)
+
+//  See http://www.boost.org/libs/config for the most recent version.//
+//  Revision $Id$
+//
+
+
+// Test file for macro BOOST_NO_CXX11_SFINAE_EXPR
+// This file should compile, if it does not then
+// BOOST_NO_CXX11_SFINAE_EXPR should be defined.
+// See file boost_no_cxx11_sfinae_expr.ipp for details
+
+// Must not have BOOST_ASSERT_CONFIG set; it defeats
+// the objective of this file:
+#ifdef BOOST_ASSERT_CONFIG
+#  undef BOOST_ASSERT_CONFIG
+#endif
+
+#include <boost/config.hpp>
+#include "test.hpp"
+
+#ifndef BOOST_NO_CXX11_SFINAE_EXPR
+#include "boost_no_cxx11_sfinae_expr.ipp"
+#else
+namespace boost_no_cxx11_sfinae_expr = empty_boost;
+#endif
+
+int main( int, char *[] )
+{
+   return boost_no_cxx11_sfinae_expr::test();
+}
+