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-rw-r--r--3rdParty/Boost/src/boost/proto/transform/lazy.hpp83
1 files changed, 83 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/proto/transform/lazy.hpp b/3rdParty/Boost/src/boost/proto/transform/lazy.hpp
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+++ b/3rdParty/Boost/src/boost/proto/transform/lazy.hpp
@@ -0,0 +1,83 @@
+#ifndef BOOST_PP_IS_ITERATING
+ ///////////////////////////////////////////////////////////////////////////////
+ /// \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)
+
+ #ifndef BOOST_PROTO_TRANSFORM_LAZY_HPP_EAN_12_02_2007
+ #define BOOST_PROTO_TRANSFORM_LAZY_HPP_EAN_12_02_2007
+
+ #include <boost/preprocessor/iteration/iterate.hpp>
+ #include <boost/preprocessor/repetition/enum_params.hpp>
+ #include <boost/preprocessor/repetition/enum_trailing_params.hpp>
+ #include <boost/proto/proto_fwd.hpp>
+ #include <boost/proto/transform/make.hpp>
+ #include <boost/proto/transform/call.hpp>
+ #include <boost/proto/transform/impl.hpp>
+
+ namespace boost { namespace proto
+ {
+ /// \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>
+ struct lazy : transform<lazy<Object> >
+ {
+ template<typename Expr, typename State, typename Data>
+ struct impl
+ : call<
+ typename make<Object>::template impl<Expr, State, Data>::result_type
+ >::template impl<Expr, State, Data>
+ {};
+ };
+
+ #define BOOST_PP_ITERATION_PARAMS_1 (3, (0, BOOST_PROTO_MAX_ARITY, <boost/proto/transform/lazy.hpp>))
+ #include BOOST_PP_ITERATE()
+
+ /// INTERNAL ONLY
+ ///
+ template<typename Object>
+ struct is_callable<lazy<Object> >
+ : mpl::true_
+ {};
+
+ }}
+
+ #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