Swift
summaryrefslogtreecommitdiffstats
path: root/3rdParty/Boost/boost/signals/detail/signals_common.hpp
diff options
context:
space:
mode:
authorRemko Tronçon <git@el-tramo.be>2009-06-01 08:48:42 (GMT)
committerRemko Tronçon <git@el-tramo.be>2009-06-01 09:24:28 (GMT)
commit2812bddd81f8a1b804c7460f4e14cd0aa393d129 (patch)
treed46294f35150c4f0f43deaf2d31fceaf945ae715 /3rdParty/Boost/boost/signals/detail/signals_common.hpp
downloadswift-contrib-2812bddd81f8a1b804c7460f4e14cd0aa393d129.zip
swift-contrib-2812bddd81f8a1b804c7460f4e14cd0aa393d129.tar.bz2
Import.
Diffstat (limited to '3rdParty/Boost/boost/signals/detail/signals_common.hpp')
-rw-r--r--3rdParty/Boost/boost/signals/detail/signals_common.hpp162
1 files changed, 162 insertions, 0 deletions
diff --git a/3rdParty/Boost/boost/signals/detail/signals_common.hpp b/3rdParty/Boost/boost/signals/detail/signals_common.hpp
new file mode 100644
index 0000000..fe1a5a1
--- /dev/null
+++ b/3rdParty/Boost/boost/signals/detail/signals_common.hpp
@@ -0,0 +1,162 @@
+// Boost.Signals library
+
+// Copyright Douglas Gregor 2001-2004. Use, modification and
+// distribution is subject to 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 http://www.boost.org
+
+#ifndef BOOST_SIGNALS_COMMON_HEADER
+#define BOOST_SIGNALS_COMMON_HEADER
+
+#ifndef BOOST_SIGNALS_NAMESPACE
+# define BOOST_SIGNALS_NAMESPACE signals
+#endif
+
+#include <boost/type_traits/conversion_traits.hpp>
+#include <boost/ref.hpp>
+#include <boost/signals/detail/config.hpp>
+
+#ifdef BOOST_HAS_ABI_HEADERS
+# include BOOST_ABI_PREFIX
+#endif
+
+namespace boost {
+ namespace BOOST_SIGNALS_NAMESPACE {
+ namespace detail {
+ // The unusable class is a placeholder for unused function arguments
+ // It is also completely unusable except that it constructable from
+ // anything. This helps compilers without partial specialization
+ // handle slots returning void.
+ struct unusable {
+ unusable() {}
+ };
+
+ // Determine the result type of a slot call
+ template<typename R>
+ struct slot_result_type {
+ typedef R type;
+ };
+
+ template<>
+ struct slot_result_type<void> {
+ typedef unusable type;
+ };
+
+ // Determine if the given type T is a signal
+ class signal_base;
+
+ template<typename T>
+ struct is_signal {
+ BOOST_STATIC_CONSTANT(bool,
+ value = (is_convertible<T*, signal_base*>::value));
+ };
+
+ /*
+ * The IF implementation is temporary code. When a Boost metaprogramming
+ * library is introduced, Boost.Signals will use it instead.
+ */
+ namespace intimate {
+ struct SelectThen
+ {
+ template<typename Then, typename Else>
+ struct Result
+ {
+ typedef Then type;
+ };
+ };
+
+ struct SelectElse
+ {
+ template<typename Then, typename Else>
+ struct Result
+ {
+ typedef Else type;
+ };
+ };
+
+ template<bool Condition>
+ struct Selector
+ {
+ typedef SelectThen type;
+ };
+
+ template<>
+ struct Selector<false>
+ {
+ typedef SelectElse type;
+ };
+ } // end namespace intimate
+
+ template<bool Condition, typename Then, typename Else>
+ struct IF
+ {
+ typedef typename intimate::Selector<Condition>::type select;
+ typedef typename select::template Result<Then,Else>::type type;
+ };
+
+ // Determine if the incoming argument is a reference_wrapper
+#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+ template<typename T>
+ struct is_ref
+ {
+ BOOST_STATIC_CONSTANT(bool, value = false);
+ };
+
+ template<typename T>
+ struct is_ref<reference_wrapper<T> >
+ {
+ BOOST_STATIC_CONSTANT(bool, value = true);
+ };
+#else // no partial specialization
+ typedef char yes_type;
+ typedef double no_type;
+
+ no_type is_ref_tester(...);
+
+ template<typename T>
+ yes_type is_ref_tester(reference_wrapper<T>*);
+
+ template<typename T>
+ struct is_ref
+ {
+ static T* t;
+ BOOST_STATIC_CONSTANT(bool,
+ value = (sizeof(is_ref_tester(t)) == sizeof(yes_type)));
+ };
+#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+
+ // A slot can be a signal, a reference to a function object, or a
+ // function object.
+ struct signal_tag {};
+ struct reference_tag {};
+ struct value_tag {};
+
+ // Classify the given slot as a signal, a reference-to-slot, or a
+ // standard slot
+ template<typename S>
+ class get_slot_tag {
+ typedef typename IF<(is_signal<S>::value),
+ signal_tag,
+ value_tag>::type signal_or_value;
+
+ public:
+ typedef typename IF<(is_ref<S>::value),
+ reference_tag,
+ signal_or_value>::type type;
+ };
+
+ // Forward declaration needed in lots of places
+ class signal_base_impl;
+ class bound_objects_visitor;
+ class slot_base;
+ } // end namespace detail
+ } // end namespace BOOST_SIGNALS_NAMESPACE
+} // end namespace boost
+
+#ifdef BOOST_HAS_ABI_HEADERS
+# include BOOST_ABI_SUFFIX
+#endif
+
+#endif // BOOST_SIGNALS_COMMON_HEADER