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Diffstat (limited to '3rdParty/Boost/src/boost/lambda/detail/is_instance_of.hpp')
| -rw-r--r-- | 3rdParty/Boost/src/boost/lambda/detail/is_instance_of.hpp | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/lambda/detail/is_instance_of.hpp b/3rdParty/Boost/src/boost/lambda/detail/is_instance_of.hpp new file mode 100644 index 0000000..1dfbd43 --- /dev/null +++ b/3rdParty/Boost/src/boost/lambda/detail/is_instance_of.hpp @@ -0,0 +1,104 @@ +// Boost Lambda Library - is_instance_of.hpp --------------------- + +// Copyright (C) 2001 Jaakko Jarvi (jaakko.jarvi@cs.utu.fi) +// +// Distributed under 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) +// +// For more information, see www.boost.org + +// --------------------------------------------------------------- + +#ifndef BOOST_LAMBDA_IS_INSTANCE_OF +#define BOOST_LAMBDA_IS_INSTANCE_OF + +#include "boost/config.hpp" // for BOOST_STATIC_CONSTANT +#include "boost/type_traits/conversion_traits.hpp" // for is_convertible +#include "boost/preprocessor/enum_shifted_params.hpp" +#include "boost/preprocessor/repeat_2nd.hpp" + +// is_instance_of -------------------------------- +// +// is_instance_of_n<A, B>::value is true, if type A is +// an instantiation of a template B, or A derives from an instantiation +// of template B +// +// n is the number of template arguments for B +// +// Example: +// is_instance_of_2<std::istream, basic_stream>::value == true + +// The original implementation was somewhat different, with different versions +// for different compilers. However, there was still a problem +// with gcc.3.0.2 and 3.0.3 compilers, which didn't think regard +// is_instance_of_N<...>::value was a constant. +// John Maddock suggested the way around this problem by building +// is_instance_of templates using boost::is_convertible. +// Now we only have one version of is_instance_of templates, which delagate +// all the nasty compiler tricks to is_convertible. + +#define BOOST_LAMBDA_CLASS(z, N,A) BOOST_PP_COMMA_IF(N) class +#define BOOST_LAMBDA_CLASS_ARG(z, N,A) BOOST_PP_COMMA_IF(N) class A##N +#define BOOST_LAMBDA_ARG(z, N,A) BOOST_PP_COMMA_IF(N) A##N + +#define BOOST_LAMBDA_CLASS_LIST(n, NAME) BOOST_PP_REPEAT(n, BOOST_LAMBDA_CLASS, NAME) + +#define BOOST_LAMBDA_CLASS_ARG_LIST(n, NAME) BOOST_PP_REPEAT(n, BOOST_LAMBDA_CLASS_ARG, NAME) + +#define BOOST_LAMBDA_ARG_LIST(n, NAME) BOOST_PP_REPEAT(n, BOOST_LAMBDA_ARG, NAME) + +namespace boost { +namespace lambda { + +#define BOOST_LAMBDA_IS_INSTANCE_OF_TEMPLATE(INDEX) \ + \ +namespace detail { \ + \ +template <template<BOOST_LAMBDA_CLASS_LIST(INDEX,T)> class F> \ +struct BOOST_PP_CAT(conversion_tester_,INDEX) { \ + template<BOOST_LAMBDA_CLASS_ARG_LIST(INDEX,A)> \ + BOOST_PP_CAT(conversion_tester_,INDEX) \ + (const F<BOOST_LAMBDA_ARG_LIST(INDEX,A)>&); \ +}; \ + \ +} /* end detail */ \ + \ +template <class From, template <BOOST_LAMBDA_CLASS_LIST(INDEX,T)> class To> \ +struct BOOST_PP_CAT(is_instance_of_,INDEX) \ +{ \ + private: \ + typedef ::boost::is_convertible< \ + From, \ + BOOST_PP_CAT(detail::conversion_tester_,INDEX)<To> \ + > helper_type; \ + \ +public: \ + BOOST_STATIC_CONSTANT(bool, value = helper_type::value); \ +}; + + +#define BOOST_LAMBDA_HELPER(z, N, A) BOOST_LAMBDA_IS_INSTANCE_OF_TEMPLATE( BOOST_PP_INC(N) ) + +// Generate the traits for 1-4 argument templates + +BOOST_PP_REPEAT_2ND(4,BOOST_LAMBDA_HELPER,FOO) + +#undef BOOST_LAMBDA_HELPER +#undef BOOST_LAMBDA_IS_INSTANCE_OF_TEMPLATE +#undef BOOST_LAMBDA_CLASS +#undef BOOST_LAMBDA_ARG +#undef BOOST_LAMBDA_CLASS_ARG +#undef BOOST_LAMBDA_CLASS_LIST +#undef BOOST_LAMBDA_ARG_LIST +#undef BOOST_LAMBDA_CLASS_ARG_LIST + +} // lambda +} // boost + +#endif + + + + + |