Swiftdiff options
Diffstat (limited to '3rdParty/Boost/src/boost/mpl/has_xxx.hpp')
| -rw-r--r-- | 3rdParty/Boost/src/boost/mpl/has_xxx.hpp | 372 |
1 files changed, 369 insertions, 3 deletions
diff --git a/3rdParty/Boost/src/boost/mpl/has_xxx.hpp b/3rdParty/Boost/src/boost/mpl/has_xxx.hpp index 39ed909..9258759 100644 --- a/3rdParty/Boost/src/boost/mpl/has_xxx.hpp +++ b/3rdParty/Boost/src/boost/mpl/has_xxx.hpp @@ -4,6 +4,7 @@ // Copyright Aleksey Gurtovoy 2002-2006 // Copyright David Abrahams 2002-2003 +// Copyright Daniel Walker 2007 // // Distributed under the Boost Software License, Version 1.0. // (See accompanying file LICENSE_1_0.txt or copy at @@ -11,20 +12,26 @@ // // See http://www.boost.org/libs/mpl for documentation. -// $Id: has_xxx.hpp 49273 2008-10-11 06:54:06Z agurtovoy $ -// $Date: 2008-10-11 02:54:06 -0400 (Sat, 11 Oct 2008) $ -// $Revision: 49273 $ +// $Id: has_xxx.hpp 64146 2010-07-19 00:46:31Z djwalker $ +// $Date: 2010-07-18 20:46:31 -0400 (Sun, 18 Jul 2010) $ +// $Revision: 64146 $ #include <boost/mpl/bool.hpp> +#include <boost/mpl/aux_/na_spec.hpp> #include <boost/mpl/aux_/type_wrapper.hpp> #include <boost/mpl/aux_/yes_no.hpp> +#include <boost/mpl/aux_/config/gcc.hpp> #include <boost/mpl/aux_/config/has_xxx.hpp> #include <boost/mpl/aux_/config/msvc_typename.hpp> #include <boost/mpl/aux_/config/msvc.hpp> #include <boost/mpl/aux_/config/static_constant.hpp> #include <boost/mpl/aux_/config/workaround.hpp> +#include <boost/preprocessor/array/elem.hpp> #include <boost/preprocessor/cat.hpp> +#include <boost/preprocessor/control/if.hpp> +#include <boost/preprocessor/repetition/enum_params.hpp> +#include <boost/preprocessor/repetition/enum_trailing_params.hpp> #if BOOST_WORKAROUND( __BORLANDC__, BOOST_TESTED_AT(0x590) ) # include <boost/type_traits/is_class.hpp> @@ -271,4 +278,363 @@ struct trait \ BOOST_MPL_HAS_XXX_TRAIT_NAMED_DEF(BOOST_PP_CAT(has_,name), name, false) \ /**/ + +#if !defined(BOOST_MPL_CFG_NO_HAS_XXX_TEMPLATE) + +// Create a boolean Metafunction to detect a nested template +// member. This implementation is based on a USENET newsgroup's +// posting by Aleksey Gurtovoy (comp.lang.c++.moderated, 2002-03-19), +// Rani Sharoni's USENET posting cited above, the non-template has_xxx +// implementations above, and discussion on the Boost mailing list. + +# if !defined(BOOST_MPL_HAS_XXX_NO_WRAPPED_TYPES) +# if BOOST_WORKAROUND(BOOST_MSVC, <= 1400) +# define BOOST_MPL_HAS_XXX_NO_WRAPPED_TYPES 1 +# endif +# endif + +# if !defined(BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION) +# if (defined(BOOST_NO_EXPLICIT_FUNCTION_TEMPLATE_ARGUMENTS)) +# define BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION 1 +# endif +# endif + +# if !defined(BOOST_MPL_HAS_XXX_NEEDS_TEMPLATE_SFINAE) +# if BOOST_WORKAROUND(BOOST_MSVC, <= 1400) +# define BOOST_MPL_HAS_XXX_NEEDS_TEMPLATE_SFINAE 1 +# endif +# endif + +// NOTE: Many internal implementation macros take a Boost.Preprocessor +// array argument called args which is of the following form. +// ( 4, ( trait, name, max_arity, default_ ) ) + +# define BOOST_MPL_HAS_MEMBER_INTROSPECTION_NAME(args) \ + BOOST_PP_CAT(BOOST_PP_ARRAY_ELEM(0, args) , _introspect) \ + /**/ + +# define BOOST_MPL_HAS_MEMBER_INTROSPECTION_SUBSTITUTE_NAME(args, n) \ + BOOST_PP_CAT(BOOST_PP_CAT(BOOST_PP_ARRAY_ELEM(0, args) , _substitute), n) \ + /**/ + +# define BOOST_MPL_HAS_MEMBER_INTROSPECTION_TEST_NAME(args) \ + BOOST_PP_CAT(BOOST_PP_ARRAY_ELEM(0, args) , _test) \ + /**/ + +// Thanks to Guillaume Melquiond for pointing out the need for the +// "substitute" template as an argument to the overloaded test +// functions to get SFINAE to work for member templates with the +// correct name but different number of arguments. +# define BOOST_MPL_HAS_MEMBER_MULTI_SUBSTITUTE(z, n, args) \ + template< \ + template< BOOST_PP_ENUM_PARAMS(BOOST_PP_INC(n), typename V) > class V \ + > \ + struct BOOST_MPL_HAS_MEMBER_INTROSPECTION_SUBSTITUTE_NAME(args, n) { \ + }; \ + /**/ + +# define BOOST_MPL_HAS_MEMBER_SUBSTITUTE(args, substitute_macro) \ + BOOST_PP_REPEAT( \ + BOOST_PP_ARRAY_ELEM(2, args) \ + , BOOST_MPL_HAS_MEMBER_MULTI_SUBSTITUTE \ + , args \ + ) \ + /**/ + +# if !BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION +# define BOOST_MPL_HAS_MEMBER_REJECT(args, member_macro) \ + template< typename V > \ + static boost::mpl::aux::no_tag \ + BOOST_MPL_HAS_MEMBER_INTROSPECTION_TEST_NAME(args)(...); \ + /**/ +# else +# define BOOST_MPL_HAS_MEMBER_REJECT(args, member_macro) \ + static boost::mpl::aux::no_tag \ + BOOST_MPL_HAS_MEMBER_INTROSPECTION_TEST_NAME(args)(...); \ + /**/ +# endif + +# if !BOOST_MPL_HAS_XXX_NO_WRAPPED_TYPES +# define BOOST_MPL_HAS_MEMBER_MULTI_ACCEPT(z, n, args) \ + template< typename V > \ + static boost::mpl::aux::yes_tag \ + BOOST_MPL_HAS_MEMBER_INTROSPECTION_TEST_NAME(args)( \ + boost::mpl::aux::type_wrapper< V > const volatile* \ + , BOOST_MPL_HAS_MEMBER_INTROSPECTION_SUBSTITUTE_NAME(args, n) < \ + V::template BOOST_PP_ARRAY_ELEM(1, args) \ + >* = 0 \ + ); \ + /**/ +# define BOOST_MPL_HAS_MEMBER_ACCEPT(args, member_macro) \ + BOOST_PP_REPEAT( \ + BOOST_PP_ARRAY_ELEM(2, args) \ + , BOOST_MPL_HAS_MEMBER_MULTI_ACCEPT \ + , args \ + ) \ + /**/ +# else +# define BOOST_MPL_HAS_MEMBER_ACCEPT(args, member_macro) \ + template< typename V > \ + static boost::mpl::aux::yes_tag \ + BOOST_MPL_HAS_MEMBER_INTROSPECTION_TEST_NAME(args)( \ + V const volatile* \ + , member_macro(args, V, T)* = 0 \ + ); \ + /**/ +# endif + +# if !BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION +# define BOOST_MPL_HAS_MEMBER_TEST(args) \ + sizeof(BOOST_MPL_HAS_MEMBER_INTROSPECTION_TEST_NAME(args)< U >(0)) \ + == sizeof(boost::mpl::aux::yes_tag) \ + /**/ +# else +# if !BOOST_MPL_HAS_XXX_NO_WRAPPED_TYPES +# define BOOST_MPL_HAS_MEMBER_TEST(args) \ + sizeof( \ + BOOST_MPL_HAS_MEMBER_INTROSPECTION_TEST_NAME(args)( \ + static_cast< boost::mpl::aux::type_wrapper< U >* >(0) \ + ) \ + ) == sizeof(boost::mpl::aux::yes_tag) \ + /**/ +# else +# define BOOST_MPL_HAS_MEMBER_TEST(args) \ + sizeof( \ + BOOST_MPL_HAS_MEMBER_INTROSPECTION_TEST_NAME(args)( \ + static_cast< U* >(0) \ + ) \ + ) == sizeof(boost::mpl::aux::yes_tag) \ + /**/ +# endif +# endif + +# define BOOST_MPL_HAS_MEMBER_INTROSPECT( \ + args, substitute_macro, member_macro \ + ) \ + template< typename U > \ + struct BOOST_MPL_HAS_MEMBER_INTROSPECTION_NAME(args) { \ + BOOST_MPL_HAS_MEMBER_SUBSTITUTE(args, substitute_macro) \ + BOOST_MPL_HAS_MEMBER_REJECT(args, member_macro) \ + BOOST_MPL_HAS_MEMBER_ACCEPT(args, member_macro) \ + BOOST_STATIC_CONSTANT( \ + bool, value = BOOST_MPL_HAS_MEMBER_TEST(args) \ + ); \ + typedef boost::mpl::bool_< value > type; \ + }; \ + /**/ + +# define BOOST_MPL_HAS_MEMBER_IMPLEMENTATION( \ + args, introspect_macro, substitute_macro, member_macro \ + ) \ + template< \ + typename T \ + , typename fallback_ \ + = boost::mpl::bool_< BOOST_PP_ARRAY_ELEM(3, args) > \ + > \ + class BOOST_PP_ARRAY_ELEM(0, args) { \ + introspect_macro(args, substitute_macro, member_macro) \ + public: \ + static const bool value \ + = BOOST_MPL_HAS_MEMBER_INTROSPECTION_NAME(args)< T >::value; \ + typedef typename BOOST_MPL_HAS_MEMBER_INTROSPECTION_NAME(args)< \ + T \ + >::type type; \ + }; \ + /**/ + +// BOOST_MPL_HAS_MEMBER_WITH_FUNCTION_SFINAE expands to the full +// implementation of the function-based metafunction. Compile with -E +// to see the preprocessor output for this macro. +# define BOOST_MPL_HAS_MEMBER_WITH_FUNCTION_SFINAE( \ + args, substitute_macro, member_macro \ + ) \ + BOOST_MPL_HAS_MEMBER_IMPLEMENTATION( \ + args \ + , BOOST_MPL_HAS_MEMBER_INTROSPECT \ + , substitute_macro \ + , member_macro \ + ) \ + /**/ + +# if BOOST_MPL_HAS_XXX_NEEDS_TEMPLATE_SFINAE + +# if !defined(BOOST_MPL_HAS_XXX_NEEDS_NAMESPACE_LEVEL_SUBSTITUTE) +# if BOOST_WORKAROUND(BOOST_MSVC, <= 1400) +# define BOOST_MPL_HAS_XXX_NEEDS_NAMESPACE_LEVEL_SUBSTITUTE 1 +# endif +# endif + +# if !BOOST_MPL_HAS_XXX_NEEDS_NAMESPACE_LEVEL_SUBSTITUTE +# define BOOST_MPL_HAS_MEMBER_INTROSPECTION_SUBSTITUTE_NAME_WITH_TEMPLATE_SFINAE( \ + args, n \ + ) \ + BOOST_MPL_HAS_MEMBER_INTROSPECTION_SUBSTITUTE_NAME(args, n) \ + /**/ +# else +# define BOOST_MPL_HAS_MEMBER_INTROSPECTION_SUBSTITUTE_NAME_WITH_TEMPLATE_SFINAE( \ + args, n \ + ) \ + BOOST_PP_CAT( \ + boost_mpl_has_xxx_ \ + , BOOST_MPL_HAS_MEMBER_INTROSPECTION_SUBSTITUTE_NAME(args, n) \ + ) \ + /**/ +# endif + +# define BOOST_MPL_HAS_MEMBER_INTROSPECTION_SUBSTITUTE_TAG_NAME( \ + args \ + ) \ + BOOST_PP_CAT( \ + BOOST_MPL_HAS_MEMBER_INTROSPECTION_SUBSTITUTE_NAME_WITH_TEMPLATE_SFINAE( \ + args, 0 \ + ) \ + , _tag \ + ) \ + /**/ + +# define BOOST_MPL_HAS_MEMBER_MULTI_SUBSTITUTE_WITH_TEMPLATE_SFINAE( \ + z, n, args \ + ) \ + template< \ + template< BOOST_PP_ENUM_PARAMS(BOOST_PP_INC(n), typename U) > class U \ + > \ + struct BOOST_MPL_HAS_MEMBER_INTROSPECTION_SUBSTITUTE_NAME_WITH_TEMPLATE_SFINAE( \ + args, n \ + ) { \ + typedef \ + BOOST_MPL_HAS_MEMBER_INTROSPECTION_SUBSTITUTE_TAG_NAME(args) \ + type; \ + }; \ + /**/ + +# define BOOST_MPL_HAS_MEMBER_SUBSTITUTE_WITH_TEMPLATE_SFINAE( \ + args, substitute_macro \ + ) \ + typedef void \ + BOOST_MPL_HAS_MEMBER_INTROSPECTION_SUBSTITUTE_TAG_NAME(args); \ + BOOST_PP_REPEAT( \ + BOOST_PP_ARRAY_ELEM(2, args) \ + , BOOST_MPL_HAS_MEMBER_MULTI_SUBSTITUTE_WITH_TEMPLATE_SFINAE \ + , args \ + ) \ + /**/ + +# define BOOST_MPL_HAS_MEMBER_REJECT_WITH_TEMPLATE_SFINAE( \ + args, member_macro \ + ) \ + template< \ + typename U \ + , typename V \ + = BOOST_MPL_HAS_MEMBER_INTROSPECTION_SUBSTITUTE_TAG_NAME(args) \ + > \ + struct BOOST_MPL_HAS_MEMBER_INTROSPECTION_TEST_NAME(args) { \ + BOOST_STATIC_CONSTANT(bool, value = false); \ + typedef boost::mpl::bool_< value > type; \ + }; \ + /**/ + +# define BOOST_MPL_HAS_MEMBER_MULTI_ACCEPT_WITH_TEMPLATE_SFINAE( \ + z, n, args \ + ) \ + template< typename U > \ + struct BOOST_MPL_HAS_MEMBER_INTROSPECTION_TEST_NAME(args)< \ + U \ + , typename \ + BOOST_MPL_HAS_MEMBER_INTROSPECTION_SUBSTITUTE_NAME_WITH_TEMPLATE_SFINAE( \ + args, n \ + )< \ + BOOST_MSVC_TYPENAME U::BOOST_PP_ARRAY_ELEM(1, args)< > \ + >::type \ + > { \ + BOOST_STATIC_CONSTANT(bool, value = true); \ + typedef boost::mpl::bool_< value > type; \ + }; \ + /**/ + +# define BOOST_MPL_HAS_MEMBER_ACCEPT_WITH_TEMPLATE_SFINAE( \ + args, member_macro \ + ) \ + BOOST_PP_REPEAT( \ + BOOST_PP_ARRAY_ELEM(2, args) \ + , BOOST_MPL_HAS_MEMBER_MULTI_ACCEPT_WITH_TEMPLATE_SFINAE \ + , args \ + ) \ + /**/ + +# define BOOST_MPL_HAS_MEMBER_INTROSPECT_WITH_TEMPLATE_SFINAE( \ + args, substitute_macro, member_macro \ + ) \ + BOOST_MPL_HAS_MEMBER_REJECT_WITH_TEMPLATE_SFINAE(args, member_macro) \ + BOOST_MPL_HAS_MEMBER_ACCEPT_WITH_TEMPLATE_SFINAE(args, member_macro) \ + template< typename U > \ + struct BOOST_MPL_HAS_MEMBER_INTROSPECTION_NAME(args) \ + : BOOST_MPL_HAS_MEMBER_INTROSPECTION_TEST_NAME(args)< U > { \ + }; \ + /**/ + +// BOOST_MPL_HAS_MEMBER_WITH_TEMPLATE_SFINAE expands to the full +// implementation of the template-based metafunction. Compile with -E +// to see the preprocessor output for this macro. +// +// Note that if BOOST_MPL_HAS_XXX_NEEDS_NAMESPACE_LEVEL_SUBSTITUTE is +// defined BOOST_MPL_HAS_MEMBER_SUBSTITUTE_WITH_TEMPLATE_SFINAE needs +// to be expanded at namespace level before +// BOOST_MPL_HAS_MEMBER_WITH_TEMPLATE_SFINAE can be used. +# define BOOST_MPL_HAS_MEMBER_WITH_TEMPLATE_SFINAE( \ + args, substitute_macro, member_macro \ + ) \ + BOOST_MPL_HAS_MEMBER_SUBSTITUTE_WITH_TEMPLATE_SFINAE( \ + args, substitute_macro \ + ) \ + BOOST_MPL_HAS_MEMBER_IMPLEMENTATION( \ + args \ + , BOOST_MPL_HAS_MEMBER_INTROSPECT_WITH_TEMPLATE_SFINAE \ + , substitute_macro \ + , member_macro \ + ) \ + /**/ + +# endif // BOOST_MPL_HAS_XXX_NEEDS_TEMPLATE_SFINAE + +// Note: In the current implementation the parameter and access macros +// are no longer expanded. +# if !BOOST_WORKAROUND(BOOST_MSVC, <= 1400) +# define BOOST_MPL_HAS_XXX_TEMPLATE_NAMED_DEF(trait, name, default_) \ + BOOST_MPL_HAS_MEMBER_WITH_FUNCTION_SFINAE( \ + ( 4, ( trait, name, BOOST_MPL_LIMIT_METAFUNCTION_ARITY, default_ ) ) \ + , BOOST_MPL_HAS_MEMBER_TEMPLATE_SUBSTITUTE_PARAMETER \ + , BOOST_MPL_HAS_MEMBER_TEMPLATE_ACCESS \ + ) \ + /**/ +# else +# define BOOST_MPL_HAS_XXX_TEMPLATE_NAMED_DEF(trait, name, default_) \ + BOOST_MPL_HAS_MEMBER_WITH_TEMPLATE_SFINAE( \ + ( 4, ( trait, name, BOOST_MPL_LIMIT_METAFUNCTION_ARITY, default_ ) ) \ + , BOOST_MPL_HAS_MEMBER_TEMPLATE_SUBSTITUTE_PARAMETER \ + , BOOST_MPL_HAS_MEMBER_TEMPLATE_ACCESS \ + ) \ + /**/ +# endif + +#else // BOOST_MPL_CFG_NO_HAS_XXX_TEMPLATE + +// placeholder implementation + +# define BOOST_MPL_HAS_XXX_TEMPLATE_NAMED_DEF(trait, name, default_) \ + template< typename T \ + , typename fallback_ = boost::mpl::bool_< default_ > > \ + struct trait { \ + BOOST_STATIC_CONSTANT(bool, value = fallback_::value); \ + typedef fallback_ type; \ + }; \ + /**/ + +#endif // BOOST_MPL_CFG_NO_HAS_XXX_TEMPLATE + +# define BOOST_MPL_HAS_XXX_TEMPLATE_DEF(name) \ + BOOST_MPL_HAS_XXX_TEMPLATE_NAMED_DEF( \ + BOOST_PP_CAT(has_, name), name, false \ + ) \ + /**/ + #endif // BOOST_MPL_HAS_XXX_HPP_INCLUDED |