Remove BOOST_SYSTEM_REQUIRE_CONST_INIT; variables are constexpr, so no longer needed. Closes #45.

include/boost/system/detail/config.hpp

@@ -48,15 +48,4 @@
 # define BOOST_SYSTEM_CONSTEXPR
 #endif
 
-// BOOST_SYSTEM_REQUIRE_CONST_INIT
-
-#define BOOST_SYSTEM_REQUIRE_CONST_INIT
-
-#if defined(__has_cpp_attribute)
-#if __has_cpp_attribute(clang::require_constant_initialization)
-# undef BOOST_SYSTEM_REQUIRE_CONST_INIT
-# define BOOST_SYSTEM_REQUIRE_CONST_INIT [[clang::require_constant_initialization]]
-#endif
-#endif
-
 #endif // BOOST_SYSTEM_DETAIL_CONFIG_HPP_INCLUDED

include/boost/system/error_code.hpp

@@ -331,12 +331,12 @@ namespace detail
 
 template<class T> struct BOOST_SYMBOL_VISIBLE cat_holder
 {
-    BOOST_SYSTEM_REQUIRE_CONST_INIT static constexpr system_error_category system_category_instance{};
-    BOOST_SYSTEM_REQUIRE_CONST_INIT static constexpr generic_error_category generic_category_instance{};
+    static constexpr system_error_category system_category_instance{};
+    static constexpr generic_error_category generic_category_instance{};
 };
 
-template<class T> BOOST_SYSTEM_REQUIRE_CONST_INIT constexpr system_error_category cat_holder<T>::system_category_instance;
-template<class T> BOOST_SYSTEM_REQUIRE_CONST_INIT constexpr generic_error_category cat_holder<T>::generic_category_instance;
+template<class T> constexpr system_error_category cat_holder<T>::system_category_instance;
+template<class T> constexpr generic_error_category cat_holder<T>::generic_category_instance;
 
 } // namespace detail