Added boost header

test/external/boost/proto/transform/detail/lazy.hpp

@@ -0,0 +1,58 @@
+#if !defined(BOOST_PROTO_DONT_USE_PREPROCESSED_FILES)
+
+    #include <boost/proto/transform/detail/preprocessed/lazy.hpp>
+
+#elif !defined(BOOST_PP_IS_ITERATING)
+
+    #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
+        #pragma wave option(preserve: 2, line: 0, output: "preprocessed/lazy.hpp")
+    #endif
+
+    ///////////////////////////////////////////////////////////////////////////////
+    /// \file lazy.hpp
+    /// Contains definition of the lazy<> transform.
+    //
+    //  Copyright 2008 Eric Niebler. 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)
+
+    #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
+        #pragma wave option(preserve: 1)
+    #endif
+
+    #define BOOST_PP_ITERATION_PARAMS_1                                                             \
+        (3, (0, BOOST_PROTO_MAX_ARITY, <boost/proto/transform/detail/lazy.hpp>))
+    #include BOOST_PP_ITERATE()
+
+    #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
+        #pragma wave option(output: null)
+    #endif
+
+#else
+
+    #define N BOOST_PP_ITERATION()
+
+    /// \brief A PrimitiveTransform that uses <tt>make\<\></tt> to build
+    /// a CallableTransform, and then uses <tt>call\<\></tt> to apply it.
+    ///
+    /// <tt>lazy\<\></tt> is useful as a higher-order transform, when the
+    /// transform to be applied depends on the current state of the
+    /// transformation. The invocation of the <tt>make\<\></tt> transform
+    /// evaluates any nested transforms, and the resulting type is treated
+    /// as a CallableTransform, which is evaluated with <tt>call\<\></tt>.
+    template<typename Object BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)>
+    struct lazy<Object(BOOST_PP_ENUM_PARAMS(N, A))>
+      : transform<lazy<Object(BOOST_PP_ENUM_PARAMS(N, A))> >
+    {
+        template<typename Expr, typename State, typename Data>
+        struct impl
+          : call<
+                typename make<Object>::template impl<Expr, State, Data>::result_type
+                (BOOST_PP_ENUM_PARAMS(N, A))
+            >::template impl<Expr, State, Data>
+        {};
+    };
+
+    #undef N
+
+#endif