X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=boost%2Fboost%2Fmpl%2Fhas_xxx.hpp;h=82e67ddca4c90bc635f743d51f1f882d6c285643;hb=96cdd70ec105748a05df885638ce78dd0ee57566;hp=dea85ced20ae5821af5e871b478eab671ab7d602;hpb=c2f99181e60c3b92ddeed85a5910ac856d155810;p=lyx.git diff --git a/boost/boost/mpl/has_xxx.hpp b/boost/boost/mpl/has_xxx.hpp index dea85ced20..82e67ddca4 100644 --- a/boost/boost/mpl/has_xxx.hpp +++ b/boost/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. -// $Source$ -// $Date: 2007-11-25 13:07:19 -0500 (Sun, 25 Nov 2007) $ -// $Revision: 41369 $ +// $Id$ +// $Date$ +// $Revision$ #include +#include #include #include +#include #include #include #include #include #include +#include #include +#include +#include +#include #if BOOST_WORKAROUND( __BORLANDC__, BOOST_TESTED_AT(0x590) ) # include @@ -148,20 +155,23 @@ template<> struct trait \ // SFINAE-based implementations below are derived from a USENET newsgroup's // posting by Rani Sharoni (comp.lang.c++.moderated, 2002-03-17 07:45:09 PST) -# elif BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1400)) \ +# elif BOOST_WORKAROUND(BOOST_MSVC, <= 1400) \ + || (BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1800)) && defined(__CUDACC__)) \ || BOOST_WORKAROUND(__IBMCPP__, <= 700) -// MSVC 7.1+ & VACPP +// MSVC 7.1 & MSVC 8.0 & VACPP // agurt, 15/jun/05: replace overload-based SFINAE implementation with SFINAE // applied to partial specialization to fix some apparently random failures // (thanks to Daniel Wallin for researching this!) -namespace boost { namespace mpl { namespace aux { -template< typename T > struct msvc71_sfinae_helper { typedef void type; }; -}}} - # define BOOST_MPL_HAS_XXX_TRAIT_NAMED_DEF(trait, name, default_) \ +template< typename T > \ +struct BOOST_PP_CAT(trait, _msvc_sfinae_helper) \ +{ \ + typedef void type; \ +};\ +\ template< typename T, typename U = void > \ struct BOOST_PP_CAT(trait,_impl_) \ { \ @@ -172,7 +182,7 @@ struct BOOST_PP_CAT(trait,_impl_) \ template< typename T > \ struct BOOST_PP_CAT(trait,_impl_)< \ T \ - , typename boost::mpl::aux::msvc71_sfinae_helper< typename T::name >::type \ + , typename BOOST_PP_CAT(trait, _msvc_sfinae_helper)< typename T::name >::type \ > \ { \ BOOST_STATIC_CONSTANT(bool, value = true); \ @@ -269,4 +279,369 @@ 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 +# else +# define BOOST_MPL_HAS_XXX_NO_WRAPPED_TYPES 0 +# 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 +# else +# define BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION 0 +# 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 +# else +# define BOOST_MPL_HAS_XXX_NEEDS_TEMPLATE_SFINAE 0 +# 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