Added boost header

test/external/boost/lambda/detail/arity_code.hpp

@@ -0,0 +1,110 @@
+// -- Boost Lambda Library -------------------------------------------------
+
+// Copyright (C) 1999, 2000 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_ARITY_CODE_HPP
+#define BOOST_LAMBDA_ARITY_CODE_HPP
+
+#include "boost/type_traits/cv_traits.hpp"
+#include "boost/type_traits/transform_traits.hpp"
+
+namespace boost { 
+namespace lambda {
+
+// These constants state, whether a lambda_functor instantiation results from 
+// an expression which contains no placeholders (NONE), 
+// only free1 placeholders (FIRST), 
+// free2 placeholders and maybe free1 placeholders (SECOND),
+// free3 and maybe free1 and free2 placeholders (THIRD),
+// freeE placeholders and maybe free1 and free2  (EXCEPTION).
+// RETHROW means, that a rethrow expression is used somewhere in the lambda_functor.
+
+enum { NONE             = 0x00, // Notice we are using bits as flags here.
+       FIRST            = 0x01, 
+       SECOND           = 0x02, 
+       THIRD            = 0x04, 
+       EXCEPTION        = 0x08, 
+       RETHROW          = 0x10};
+
+
+template<class T>
+struct get_tuple_arity;
+
+namespace detail {
+
+template <class T> struct get_arity_;
+
+} // end detail;
+
+template <class T> struct get_arity {
+
+  BOOST_STATIC_CONSTANT(int, value = detail::get_arity_<typename boost::remove_cv<typename boost::remove_reference<T>::type>::type>::value);
+
+};
+
+namespace detail {
+
+template<class T>
+struct get_arity_ {
+  BOOST_STATIC_CONSTANT(int, value = 0);
+};
+
+template<class T>
+struct get_arity_<lambda_functor<T> > {
+  BOOST_STATIC_CONSTANT(int, value = get_arity<T>::value);
+};
+
+template<class Action, class Args>
+struct get_arity_<lambda_functor_base<Action, Args> > {
+  BOOST_STATIC_CONSTANT(int, value = get_tuple_arity<Args>::value);
+};
+
+template<int I>
+struct get_arity_<placeholder<I> > {
+  BOOST_STATIC_CONSTANT(int, value = I);
+};
+
+} // detail 
+
+template<class T>
+struct get_tuple_arity {
+  BOOST_STATIC_CONSTANT(int, value = get_arity<typename T::head_type>::value | get_tuple_arity<typename T::tail_type>::value);
+};
+
+
+template<>
+struct get_tuple_arity<null_type> {
+  BOOST_STATIC_CONSTANT(int, value = 0);
+};
+
+
+  // Does T have placeholder<I> as it's subexpression?
+
+template<class T, int I>
+struct has_placeholder {
+  BOOST_STATIC_CONSTANT(bool, value = (get_arity<T>::value & I) != 0);
+}; 
+
+template<int I, int J>
+struct includes_placeholder {
+  BOOST_STATIC_CONSTANT(bool, value = (J & I) != 0);
+};
+
+template<int I, int J>
+struct lacks_placeholder {
+  BOOST_STATIC_CONSTANT(bool, value = ((J & I) == 0));
+};
+
+
+} // namespace lambda
+} // namespace boost
+
+#endif