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Make error_code, error_condition literal if C++14 constexpr is available

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Peter Dimov committed 2018-01-14 07:24:00 +02:00
1 parent d28c6ff128
commit 7b6dcf6ac6
4 files changed
+204 -88
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include/boost/system/detail/error_code.ipp
+43 -37
View File
@@ -35,31 +35,13 @@
//--------------------------------------------------------------------------------------//
namespace boost
{
namespace system
{
namespace system
{
namespace detail
{
// standard error categories -------------------------------------------------------//
class generic_error_category : public error_category
{
public:
generic_error_category(){}
const char * name() const BOOST_SYSTEM_NOEXCEPT;
std::string message( int ev ) const;
};
class system_error_category : public error_category
{
public:
system_error_category(){}
const char * name() const BOOST_SYSTEM_NOEXCEPT;
std::string message( int ev ) const;
error_condition default_error_condition( int ev ) const BOOST_SYSTEM_NOEXCEPT;
};
#ifdef BOOST_ERROR_CODE_HEADER_ONLY
# define BOOST_SYSTEM_INLINE inline
#else
@@ -474,23 +456,47 @@ namespace detail
// address for comparison purposes
# endif
# ifdef BOOST_ERROR_CODE_HEADER_ONLY
# define BOOST_SYSTEM_LINKAGE inline
# else
# define BOOST_SYSTEM_LINKAGE BOOST_SYSTEM_DECL
# endif
#if defined(BOOST_ERROR_CODE_HEADER_ONLY)
BOOST_SYSTEM_LINKAGE const error_category & system_category() BOOST_SYSTEM_NOEXCEPT
{
static const detail::system_error_category system_category_const;
return system_category_const;
}
// defined in error_code.hpp
BOOST_SYSTEM_LINKAGE const error_category & generic_category() BOOST_SYSTEM_NOEXCEPT
{
static const detail::generic_error_category generic_category_const;
return generic_category_const;
}
#elif defined(BOOST_SYSTEM_HAS_CONSTEXPR)
#define BOOST_SYSTEM_CONST_INIT
#if defined(__has_cpp_attribute)
#if __has_cpp_attribute(clang::require_constant_initialization)
# undef BOOST_SYSTEM_CONST_INIT
# define BOOST_SYSTEM_CONST_INIT [[clang::require_constant_initialization]]
#endif
#endif
namespace detail
{
BOOST_SYSTEM_CONST_INIT const system_error_category system_category_const;
BOOST_SYSTEM_CONST_INIT const generic_error_category generic_category_const;
} // namespace detail
#undef BOOST_SYSTEM_CONST_INIT
#else
BOOST_SYSTEM_DECL const error_category & system_category() BOOST_SYSTEM_NOEXCEPT
{
static const detail::system_error_category system_category_const;
return system_category_const;
}
BOOST_SYSTEM_DECL const error_category & generic_category() BOOST_SYSTEM_NOEXCEPT
{
static const detail::generic_error_category generic_category_const;
return generic_category_const;
}
#endif
} // namespace system
} // namespace system
} // namespace boost