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Boost-Commit : |
Subject: [Boost-commit] svn:boost r83088 - sandbox/type_erasure/boost/type_erasure
From: steven_at_[hidden]
Date: 2013-02-22 13:12:05
Author: steven_watanabe
Date: 2013-02-22 13:12:04 EST (Fri, 22 Feb 2013)
New Revision: 83088
URL: http://svn.boost.org/trac/boost/changeset/83088
Log:
Variadic implementation of BOOST_TYPE_ERASURE_FREE.
Text files modified:
sandbox/type_erasure/boost/type_erasure/free.hpp | 101 ++++++++++++++++++++++++++++++++++++++++
1 files changed, 101 insertions(+), 0 deletions(-)
Modified: sandbox/type_erasure/boost/type_erasure/free.hpp
==============================================================================
--- sandbox/type_erasure/boost/type_erasure/free.hpp (original)
+++ sandbox/type_erasure/boost/type_erasure/free.hpp 2013-02-22 13:12:04 EST (Fri, 22 Feb 2013)
@@ -60,6 +60,8 @@
}
}
+#if defined(BOOST_NO_VARIADIC_TEMPLATES) || defined(BOOST_TYPE_ERASURE_DOXYGEN)
+
/** INTERNAL ONLY */
#define BOOST_TYPE_ERASURE_FREE_QUALIFIED_ID(seq, N) \
BOOST_TYPE_ERASURE_QUALIFIED_NAME(seq)<R(BOOST_PP_ENUM_PARAMS(N, T))>
@@ -120,6 +122,105 @@
\
} \
}
+
+#else
+
+namespace boost {
+namespace type_erasure {
+
+template<int... N>
+struct index_list {};
+
+namespace detail {
+
+template<class Sig>
+struct transform_free_signature;
+
+template<class T, int N>
+struct push_back_index;
+
+template<int... N, int X>
+struct push_back_index<index_list<N...>, X>
+{
+ typedef index_list<N..., X> type;
+};
+
+template<int N>
+struct make_index_list {
+ typedef typename push_back_index<
+ typename make_index_list<N-1>::type,
+ N-1
+ >::type type;
+};
+
+template<>
+struct make_index_list<0> {
+ typedef index_list<> type;
+};
+
+}
+}
+}
+
+/** INTERNAL ONLY */
+#define BOOST_TYPE_ERASURE_FREE_II(qual_name, concept_name, function_name, N) \
+ BOOST_TYPE_ERASURE_OPEN_NAMESPACE(qual_name) \
+ \
+ template<class Sig> \
+ struct concept_name; \
+ \
+ template<class R, class... T> \
+ struct concept_name<R(T...)> { \
+ static R apply(T... t) \
+ { return function_name(t...); } \
+ }; \
+ \
+ template<class... T> \
+ struct concept_name<void(T...)> { \
+ static void apply(T... t) \
+ { function_name(t...); } \
+ }; \
+ \
+ BOOST_TYPE_ERASURE_CLOSE_NAMESPACE(qual_name) \
+ \
+ namespace boost { \
+ namespace type_erasure { \
+ \
+ template<class Sig, class Base, class Idx> \
+ struct inject ## concept_name; \
+ template<class R, class... T, class Base, int... I> \
+ struct inject ## concept_name<R(T...), Base, index_list<I...> > : Base {\
+ typedef typename ::boost::type_erasure::detail::first_placeholder_index< \
+ typename ::boost::remove_cv< \
+ typename ::boost::remove_reference<T>::type \
+ >::type... \
+ >::type _boost_type_erasure_free_p_idx; \
+ friend typename ::boost::type_erasure::rebind_any<Base, R>::type\
+ function_name( \
+ typename ::boost::mpl::eval_if_c<(_boost_type_erasure_free_p_idx::value == I), \
+ ::boost::type_erasure::detail::maybe_const_this_param<T, Base>, \
+ ::boost::type_erasure::as_param<Base, T> \
+ >::type... t) \
+ { \
+ return ::boost::type_erasure::call( \
+ BOOST_TYPE_ERASURE_QUALIFIED_NAME(qual_name)<R(T...)>(),\
+ t...); \
+ } \
+ }; \
+ \
+ template<class R, class... T, class Base> \
+ struct concept_interface< \
+ BOOST_TYPE_ERASURE_QUALIFIED_NAME(qual_name)<R(T...)>, \
+ Base, \
+ typename ::boost::type_erasure::detail::first_placeholder< \
+ typename ::boost::remove_cv<typename ::boost::remove_reference<T>::type>::type...>::type \
+ > : inject ## concept_name<R(T...), Base, typename ::boost::type_erasure::detail::make_index_list<sizeof...(T)>::type>\
+ {}; \
+ \
+ } \
+ }
+
+#endif
/** INTERNAL ONLY */
#define BOOST_TYPE_ERASURE_FREE_I(namespace_name, concept_name, function_name, N)\
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