Implement BOOST_NO_CXX11_OVERRIDE and BOOST_OVERRIDE

checks/Jamfile.v2

@@ -93,6 +93,7 @@ obj cxx11_hdr_unordered_set : test_case.cpp : <define>TEST_BOOST_NO_CXX11_HDR_UN
 obj cxx11_inline_namespaces : test_case.cpp : <define>TEST_BOOST_NO_CXX11_INLINE_NAMESPACES ;
 obj cxx11_non_public_defaulted_functions : test_case.cpp : <define>TEST_BOOST_NO_CXX11_NON_PUBLIC_DEFAULTED_FUNCTIONS ;
 obj cxx11_numeric_limits : test_case.cpp : <define>TEST_BOOST_NO_CXX11_NUMERIC_LIMITS ;
+obj cxx11_override : test_case.cpp : <define>TEST_BOOST_NO_CXX11_OVERRIDE ;
 obj cxx11_pointer_traits : test_case.cpp : <define>TEST_BOOST_NO_CXX11_POINTER_TRAITS ;
 obj cxx11_ref_qualifiers : test_case.cpp : <define>TEST_BOOST_NO_CXX11_REF_QUALIFIERS ;
 obj cxx11_sfinae_expr : test_case.cpp : <define>TEST_BOOST_NO_CXX11_SFINAE_EXPR ;

checks/test_case.cpp

@@ -421,6 +421,11 @@
 #     error "Defect macro BOOST_NO_CXX11_NUMERIC_LIMITS is defined."
 #  endif
 #endif
+#ifdef TEST_BOOST_NO_CXX11_OVERRIDE
+#  ifdef BOOST_NO_CXX11_OVERRIDE
+#     error "Defect macro BOOST_NO_CXX11_OVERRIDE is defined."
+#  endif
+#endif
 #ifdef TEST_BOOST_NO_CXX11_POINTER_TRAITS
 #  ifdef BOOST_NO_CXX11_POINTER_TRAITS
 #     error "Defect macro BOOST_NO_CXX11_POINTER_TRAITS is defined."

doc/macro_reference.qbk

@@ -685,6 +685,8 @@ compilers implementing an early draft of the C++11 standard (in particular, inco
 [[`BOOST_NO_CXX11_NUMERIC_LIMITS`][The standard library `<limits>` header does
 not support the C++11 version of `numeric_limits`. 
 ]]
+[[`BOOST_NO_CXX11_OVERRIDE`][The compiler does not support `override`.
+]]
 [[`BOOST_NO_CXX11_POINTER_TRAITS`][The standard library does not provide a
 C++11 version of `std::pointer_traits` in <memory>.]]
 [[`BOOST_NO_CXX11_RANGE_BASED_FOR`][The compiler does not support
@@ -793,6 +795,10 @@ with:
   static BOOST_CONSTEXPR_OR_CONST UIntType xor_mask = a;
 ``
 ]]
+[[`BOOST_OVERRIDE`][
+If `BOOST_NO_CXX11_OVERRIDE` is not defined (i.e. C++11 compliant compilers),
+expands to `override` keyword, otherwise expands to nothing.
+]]
 [[`BOOST_STATIC_CONSTEXPR`][
 This is a shortcut for `static BOOST_CONSTEXPR_OR_CONST`. For example, when defining const expr variables replace:
 ``

include/boost/config/compiler/borland.hpp

@@ -198,6 +198,7 @@
 #define BOOST_NO_CXX11_INLINE_NAMESPACES
 #define BOOST_NO_CXX11_REF_QUALIFIERS
 #define BOOST_NO_CXX11_FINAL
+#define BOOST_NO_CXX11_OVERRIDE
 #define BOOST_NO_CXX11_THREAD_LOCAL
 #define BOOST_NO_CXX11_UNRESTRICTED_UNION
 

include/boost/config/compiler/clang.hpp

@@ -250,6 +250,7 @@
 
 #if !__has_feature(cxx_override_control)
 #  define BOOST_NO_CXX11_FINAL
+#  define BOOST_NO_CXX11_OVERRIDE
 #endif
 
 #if !__has_feature(cxx_unrestricted_unions)

include/boost/config/compiler/codegear.hpp

@@ -251,6 +251,7 @@
 #define BOOST_NO_CXX11_INLINE_NAMESPACES
 #define BOOST_NO_CXX11_REF_QUALIFIERS
 #define BOOST_NO_CXX11_FINAL
+#define BOOST_NO_CXX11_OVERRIDE
 #define BOOST_NO_CXX11_THREAD_LOCAL
 #define BOOST_NO_CXX11_DECLTYPE_N3276
 #define BOOST_NO_CXX11_UNRESTRICTED_UNION

include/boost/config/compiler/common_edg.hpp

@@ -107,6 +107,7 @@
 #define BOOST_NO_CXX11_INLINE_NAMESPACES
 #define BOOST_NO_CXX11_REF_QUALIFIERS
 #define BOOST_NO_CXX11_FINAL
+#define BOOST_NO_CXX11_OVERRIDE
 #define BOOST_NO_CXX11_THREAD_LOCAL
 #define BOOST_NO_CXX11_UNRESTRICTED_UNION
 

include/boost/config/compiler/cray.hpp

@@ -201,6 +201,7 @@
 #define BOOST_NO_CXX11_DELETED_FUNCTIONS
 #define BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS
 #define BOOST_NO_CXX11_FINAL
+#define BOOST_NO_CXX11_OVERRIDE
 #define BOOST_NO_CXX11_FUNCTION_TEMPLATE_DEFAULT_ARGS
 #define BOOST_NO_CXX11_LAMBDAS
 #define BOOST_NO_CXX11_LOCAL_CLASS_TEMPLATE_PARAMETERS
@@ -275,6 +276,7 @@
 #undef BOOST_NO_CXX11_DELETED_FUNCTIONS
 #undef BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS
 #undef BOOST_NO_CXX11_FINAL
+#undef BOOST_NO_CXX11_OVERRIDE
 #undef BOOST_NO_CXX11_FUNCTION_TEMPLATE_DEFAULT_ARGS
 #undef BOOST_NO_CXX11_LAMBDAS
 #undef BOOST_NO_CXX11_LOCAL_CLASS_TEMPLATE_PARAMETERS
@@ -346,6 +348,7 @@
 #undef  BOOST_NO_CXX11_CHAR32_T
 #undef  BOOST_NO_CXX11_INLINE_NAMESPACES
 #undef  BOOST_NO_CXX11_FINAL
+#undef BOOST_NO_CXX11_OVERRIDE
 #undef  BOOST_NO_CXX11_FIXED_LENGTH_VARIADIC_TEMPLATE_EXPANSION_PACKS
 #undef  BOOST_NO_CXX11_FUNCTION_TEMPLATE_DEFAULT_ARGS
 #define BOOST_NO_CXX11_SFINAE_EXPR // This is correct, even though '*_fail.cpp' test fails.

include/boost/config/compiler/digitalmars.hpp

@@ -83,6 +83,7 @@
 #define BOOST_NO_CXX11_INLINE_NAMESPACES
 #define BOOST_NO_CXX11_REF_QUALIFIERS
 #define BOOST_NO_CXX11_FINAL
+#define BOOST_NO_CXX11_OVERRIDE
 #define BOOST_NO_CXX11_THREAD_LOCAL
 #define BOOST_NO_CXX11_UNRESTRICTED_UNION
 

include/boost/config/compiler/gcc.hpp

@@ -249,6 +249,7 @@
 #  define BOOST_NO_CXX11_TEMPLATE_ALIASES
 #  define BOOST_NO_CXX11_USER_DEFINED_LITERALS
 #  define BOOST_NO_CXX11_FIXED_LENGTH_VARIADIC_TEMPLATE_EXPANSION_PACKS
+#  define BOOST_NO_CXX11_OVERRIDE
 #endif
 
 // C++0x features in 4.8.n and later

include/boost/config/compiler/gcc_xml.hpp

@@ -61,6 +61,7 @@
 #  define BOOST_NO_CXX11_INLINE_NAMESPACES
 #  define BOOST_NO_CXX11_REF_QUALIFIERS
 #  define BOOST_NO_CXX11_FINAL
+#  define BOOST_NO_CXX11_OVERRIDE
 #  define BOOST_NO_CXX11_THREAD_LOCAL
 #  define BOOST_NO_CXX11_UNRESTRICTED_UNION
 

include/boost/config/compiler/intel.hpp

@@ -501,8 +501,10 @@ template<> struct assert_intrinsic_wchar_t<unsigned short> {};
 #endif
 
 // BOOST_NO_CXX11_FINAL
+// BOOST_NO_CXX11_OVERRIDE
 #if (BOOST_INTEL_CXX_VERSION >= 1400) && (!defined(BOOST_INTEL_GCC_VERSION) || (BOOST_INTEL_GCC_VERSION >= 40700)) && (!defined(_MSC_VER) || (_MSC_VER >= 1700))
 #  undef BOOST_NO_CXX11_FINAL
+#  undef BOOST_NO_CXX11_OVERRIDE
 #endif
 
 // BOOST_NO_CXX11_UNRESTRICTED_UNION

include/boost/config/compiler/metrowerks.hpp

@@ -126,6 +126,7 @@
 #define BOOST_NO_CXX11_INLINE_NAMESPACES
 #define BOOST_NO_CXX11_REF_QUALIFIERS
 #define BOOST_NO_CXX11_FINAL
+#define BOOST_NO_CXX11_OVERRIDE
 #define BOOST_NO_CXX11_THREAD_LOCAL
 #define BOOST_NO_CXX11_UNRESTRICTED_UNION
 

include/boost/config/compiler/mpw.hpp

@@ -75,6 +75,7 @@
 #define BOOST_NO_CXX11_INLINE_NAMESPACES
 #define BOOST_NO_CXX11_REF_QUALIFIERS
 #define BOOST_NO_CXX11_FINAL
+#define BOOST_NO_CXX11_OVERRIDE
 #define BOOST_NO_CXX11_THREAD_LOCAL
 #define BOOST_NO_CXX11_UNRESTRICTED_UNION
 

include/boost/config/compiler/pathscale.hpp

@@ -88,6 +88,7 @@
 #  define BOOST_NO_CXX11_INLINE_NAMESPACES
 #  define BOOST_NO_CXX11_REF_QUALIFIERS
 #  define BOOST_NO_CXX11_FINAL
+#  define BOOST_NO_CXX11_OVERRIDE
 #  define BOOST_NO_CXX11_THREAD_LOCAL
 #  define BOOST_NO_CXX11_UNRESTRICTED_UNION
 

include/boost/config/compiler/sunpro_cc.hpp

@@ -123,6 +123,7 @@
 #define BOOST_NO_CXX11_TRAILING_RESULT_TYPES
 #define BOOST_NO_CXX11_INLINE_NAMESPACES
 #define BOOST_NO_CXX11_FINAL
+#define BOOST_NO_CXX11_OVERRIDE
 #define BOOST_NO_CXX11_UNRESTRICTED_UNION
 #endif
 

include/boost/config/compiler/vacpp.hpp

@@ -137,6 +137,7 @@
 #define BOOST_NO_CXX11_INLINE_NAMESPACES
 #define BOOST_NO_CXX11_REF_QUALIFIERS
 #define BOOST_NO_CXX11_FINAL
+#define BOOST_NO_CXX11_OVERRIDE
 #define BOOST_NO_CXX11_THREAD_LOCAL
 #define BOOST_NO_CXX11_UNRESTRICTED_UNION
 

include/boost/config/compiler/visualc.hpp

@@ -144,6 +144,7 @@
 #  define BOOST_NO_CXX11_FINAL
 #  define BOOST_NO_CXX11_RANGE_BASED_FOR
 #  define BOOST_NO_CXX11_SCOPED_ENUMS
+#  define BOOST_NO_CXX11_OVERRIDE
 #endif // _MSC_VER < 1700
 
 // C++11 features supported by VC++ 12 (aka 2013).

include/boost/config/compiler/xlcpp.hpp

@@ -194,6 +194,7 @@
 
 #if !__has_feature(cxx_override_control)
 #  define BOOST_NO_CXX11_FINAL
+#  define BOOST_NO_CXX11_OVERRIDE
 #endif
 
 #if !__has_feature(cxx_unrestricted_unions)

include/boost/config/compiler/xlcpp_zos.hpp

@@ -140,6 +140,7 @@
 #define BOOST_NO_CXX11_THREAD_LOCAL
 #define BOOST_NO_CXX11_REF_QUALIFIERS
 #define BOOST_NO_CXX11_FINAL
+#define BOOST_NO_CXX11_OVERRIDE
 #define BOOST_NO_CXX11_ALIGNAS
 #define BOOST_NO_CXX11_UNRESTRICTED_UNION
 #define BOOST_NO_CXX14_VARIABLE_TEMPLATES

include/boost/config/detail/suffix.hpp

@@ -667,6 +667,12 @@ namespace std{ using ::type_info; }
 #  define BOOST_UNLIKELY(x) x
 #endif
 
+#if !defined(BOOST_NO_CXX11_OVERRIDE)
+#  define BOOST_OVERRIDE override
+#else
+#  define BOOST_OVERRIDE
+#endif
+
 // Type and data alignment specification
 //
 #if !defined(BOOST_ALIGNMENT)

test/Jamfile.v2

@@ -110,6 +110,7 @@ test-suite config
     [ run helper_macros_test.cpp ]
     [ compile pragma_message_test.cpp ]
     [ compile header_deprecated_test.cpp ]
+    [ compile boost_override_test.cpp ]
   ;
 
 obj has_clang_implicit_fallthrough : cmd_line_check.cpp :

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 Mon Dec 09 09:47:37 2019
+# This file was automatically generated on Thu Apr  9 14:27:07 2020
 #  by libs/config/tools/generate.cpp
 # Copyright John Maddock.
 # Use, modification and distribution are subject to the 
@@ -268,6 +268,9 @@ test-suite "BOOST_NO_CXX11_NON_PUBLIC_DEFAULTED_FUNCTIONS" :
 test-suite "BOOST_NO_CXX11_NUMERIC_LIMITS" : 
 [ run ../no_cxx11_numeric_limits_pass.cpp ]
 [ compile-fail ../no_cxx11_numeric_limits_fail.cpp ] ;
+test-suite "BOOST_NO_CXX11_OVERRIDE" : 
+[ run ../no_cxx11_override_pass.cpp ]
+[ compile-fail ../no_cxx11_override_fail.cpp ] ;
 test-suite "BOOST_NO_CXX11_POINTER_TRAITS" : 
 [ run ../no_cxx11_pointer_traits_pass.cpp ]
 [ compile-fail ../no_cxx11_pointer_traits_fail.cpp ] ;

test/boost_no_cxx11_override.ipp

@@ -0,0 +1,32 @@
+/*
+Copyright 2020 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_OVERRIDE
+// TITLE: C++11 SFINAE for expressions
+// DESCRIPTION: C++11 SFINAE for expressions not supported.
+
+namespace boost_no_cxx11_override {
+
+struct base {
+    virtual void first() = 0;
+    virtual void second() { }
+};
+
+struct derived
+    : base {
+    void first() override { }
+    void second() override { }
+};
+
+int test()
+{
+    return 0;
+}
+
+} /* boost_no_cxx11_override */

test/boost_override_test.cpp

@@ -0,0 +1,19 @@
+/*
+Copyright 2020 Glen Joseph Fernandes
+(glenjofe@gmail.com)
+
+Distributed under Boost Software License, Version 1.0.
+(http://www.boost.org/LICENSE_1_0.txt)
+*/
+#include <boost/config.hpp>
+
+struct base {
+    virtual void first() = 0;
+    virtual void second() { }
+};
+
+struct derived
+    : base {
+    void first() BOOST_OVERRIDE { }
+    void second() BOOST_OVERRIDE { }
+};

test/config_info.cpp

@@ -1131,6 +1131,7 @@ void print_boost_macros()
    PRINT_MACRO(BOOST_NO_CXX11_NON_PUBLIC_DEFAULTED_FUNCTIONS);
    PRINT_MACRO(BOOST_NO_CXX11_NULLPTR);
    PRINT_MACRO(BOOST_NO_CXX11_NUMERIC_LIMITS);
+   PRINT_MACRO(BOOST_NO_CXX11_OVERRIDE);
    PRINT_MACRO(BOOST_NO_CXX11_POINTER_TRAITS);
    PRINT_MACRO(BOOST_NO_CXX11_RANGE_BASED_FOR);
    PRINT_MACRO(BOOST_NO_CXX11_RAW_LITERALS);
@@ -1234,6 +1235,7 @@ void print_boost_macros()
    PRINT_MACRO(BOOST_NO_VOID_RETURNS);
 
 
+
    // END GENERATED BLOCK
 
    PRINT_MACRO(BOOST_INTEL);

test/config_test.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Mon Dec 09 09:47:37 2019
+//  This file was automatically generated on Thu Apr  9 14:27:07 2020
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 
@@ -247,6 +247,11 @@ namespace boost_no_cxx11_non_public_defaulted_functions = empty_boost;
 #else
 namespace boost_no_cxx11_numeric_limits = empty_boost;
 #endif
+#ifndef BOOST_NO_CXX11_OVERRIDE
+#include "boost_no_cxx11_override.ipp"
+#else
+namespace boost_no_cxx11_override = empty_boost;
+#endif
 #ifndef BOOST_NO_CXX11_POINTER_TRAITS
 #include "boost_no_cxx11_pointer_traits.ipp"
 #else
@@ -1431,6 +1436,11 @@ int main( int, char *[] )
       std::cerr << "Failed test for BOOST_NO_CXX11_NUMERIC_LIMITS at: " << __FILE__ << ":" << __LINE__ << std::endl;
       ++error_count;
    }
+   if(0 != boost_no_cxx11_override::test())
+   {
+      std::cerr << "Failed test for BOOST_NO_CXX11_OVERRIDE at: " << __FILE__ << ":" << __LINE__ << std::endl;
+      ++error_count;
+   }
    if(0 != boost_no_cxx11_pointer_traits::test())
    {
       std::cerr << "Failed test for BOOST_NO_CXX11_POINTER_TRAITS at: " << __FILE__ << ":" << __LINE__ << std::endl;

test/no_cxx11_override_fail.cpp

@@ -0,0 +1,37 @@
+//  This file was automatically generated on Thu Apr  9 14:27:07 2020
+//  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_OVERRIDE
+// This file should not compile, if it does then
+// BOOST_NO_CXX11_OVERRIDE should not be defined.
+// See file boost_no_cxx11_override.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_OVERRIDE
+#include "boost_no_cxx11_override.ipp"
+#else
+#error "this file should not compile"
+#endif
+
+int main( int, char *[] )
+{
+   return boost_no_cxx11_override::test();
+}
+