1 files changed, 59 insertions, 0 deletions
diff --git a/boost/local_function/aux_/preprocessor/traits/decl_params.hpp b/boost/local_function/aux_/preprocessor/traits/decl_params.hpp
new file mode 100644
index 0000000000..ae5a34f776
--- /dev/null
+++ b/boost/local_function/aux_/preprocessor/traits/decl_params.hpp
@@ -0,0 +1,59 @@
+
+// Copyright (C) 2009-2012 Lorenzo Caminiti
+// Distributed under the Boost Software License, Version 1.0
+// (see accompanying file LICENSE_1_0.txt or a copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+// Home at http://www.boost.org/libs/local_function
+
+#ifndef BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_PARAMS_HPP_
+#define BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_PARAMS_HPP_
+
+#include <boost/local_function/aux_/preprocessor/traits/decl_/index.hpp>
+#include <boost/local_function/aux_/preprocessor/traits/param.hpp>
+#include <boost/local_function/detail/preprocessor/keyword/default.hpp>
+#include <boost/preprocessor/tuple/elem.hpp>
+#include <boost/preprocessor/tuple/eat.hpp>
+#include <boost/preprocessor/tuple/rem.hpp>
+#include <boost/preprocessor/arithmetic/inc.hpp>
+#include <boost/preprocessor/control/iif.hpp>
+#include <boost/preprocessor/logical/compl.hpp>
+#include <boost/preprocessor/facilities/is_empty.hpp>
+#include <boost/preprocessor/list/adt.hpp>
+#include <boost/preprocessor/list/fold_left.hpp>
+
+// PRIVATE //
+
+#define BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_PARAMS_DEFAULT_OP_(s, \
+        default_count, param_traits) \
+    BOOST_PP_IIF(BOOST_PP_IS_EMPTY( \
+            BOOST_LOCAL_FUNCTION_AUX_PP_PARAM_TRAITS_DEFAULT(param_traits)), \
+        BOOST_PP_TUPLE_REM(1) \
+    , \
+        BOOST_PP_INC \
+    )(default_count)
+
+// Precondition: params is a pp-list which is not nil.
+#define BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_PARAMS_DEFAULT_COUNT_(params) \
+    BOOST_PP_LIST_FOLD_LEFT( \
+            BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_PARAMS_DEFAULT_OP_, \
+            0 /* start with defaults_count to 0 */, params)
+
+// PUBLIC //
+
+// Expand: pp-list of param-traits (no bound variables).
+#define BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_PARAMS(decl_traits) \
+    BOOST_PP_TUPLE_ELEM(BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_INDEX_MAX, \
+            BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_INDEX_PARAMS, decl_traits)
+
+// Expand: number of parameters with default values (0 if no default).
+#define BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_PARAMS_DEFAULT_COUNT( \
+        decl_traits) \
+    BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS( \
+            BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_PARAMS(decl_traits)), \
+        BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_PARAMS_DEFAULT_COUNT_ \
+    , \
+        0 BOOST_PP_TUPLE_EAT(1) \
+    )(BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_PARAMS(decl_traits))
+
+#endif // #include guard
+