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Subject: [Boost-commit] svn:boost r67180 - in branches/release: . boost boost/algorithm/string boost/archive boost/bimap boost/config boost/detail boost/filesystem boost/functional/hash boost/fusion boost/gil boost/graph boost/integer boost/interprocess boost/intrusive boost/io boost/iostreams boost/math boost/msm boost/numeric/ublas boost/program_options boost/property_tree boost/proto/transform boost/python boost/range boost/regex boost/serialization boost/signals boost/signals2 boost/spirit boost/spirit/home boost/spirit/home/karma boost/spirit/home/support boost/statechart boost/system boost/thread boost/tr1 boost/type_traits boost/typeof boost/unordered boost/utility boost/uuid boost/variant boost/wave doc libs libs/algorithm/string libs/array/doc libs/array/test libs/bimap libs/config libs/date_time libs/filesystem libs/functional/hash libs/fusion libs/graph_parallel libs/integer libs/interprocess libs/intrusive libs/iostreams libs/math libs/math/doc libs/math/doc/sf_and_dist libs/mpi/build libs/mpl/doc/refmanual libs/mpl/doc/src/refmanual libs/msm libs/numeric/ublas libs/numeric/ublas/doc libs/program_options libs/property_tree libs/python libs/range libs/regex libs/serialization libs/serialization/doc libs/serialization/example libs/serialization/src libs/serialization/test libs/serialization/vc7ide libs/signals libs/signals2 libs/spirit libs/spirit/classic/example libs/spirit/doc libs/spirit/example libs/spirit/phoenix libs/spirit/test libs/spirit/test/qi libs/statechart libs/static_assert libs/system libs/thread libs/timer libs/tr1 libs/type_traits libs/type_traits/doc libs/typeof/doc libs/unordered libs/utility libs/utility/swap/test libs/uuid libs/wave more more/getting_started status tools tools/bcp tools/boostbook tools/build/v2 tools/inspect tools/quickbook tools/regression tools/regression/src tools/release tools/wave
From: eric_at_[hidden]
Date: 2010-12-11 19:00:33
Author: eric_niebler
Date: 2010-12-11 19:00:32 EST (Sat, 11 Dec 2010)
New Revision: 67180
URL: http://svn.boost.org/trac/boost/changeset/67180
Log:
Merged revisions 67158,67179 via svnmerge from 
https://svn.boost.org/svn/boost/trunk
........
  r67158 | eric_niebler | 2010-12-11 00:09:18 -0500 (Sat, 11 Dec 2010) | 1 line
  
  clean-up proto::make implementation
........
  r67179 | eric_niebler | 2010-12-11 11:30:03 -0500 (Sat, 11 Dec 2010) | 1 line
  
  undefine temporary macro
........
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Text files modified: 
   branches/release/boost/proto/transform/make.hpp |   145 ++++++++++++++++++++++----------------- 
   1 files changed, 83 insertions(+), 62 deletions(-)
Modified: branches/release/boost/proto/transform/make.hpp
==============================================================================
--- branches/release/boost/proto/transform/make.hpp	(original)
+++ branches/release/boost/proto/transform/make.hpp	2010-12-11 19:00:32 EST (Sat, 11 Dec 2010)
@@ -37,12 +37,36 @@
     {
         namespace detail
         {
-            template<BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT(BOOST_PROTO_MAX_ARITY, typename A, void)>
-            struct typelist
+            enum callable_type
             {
-                typedef void type;
+                CT_not_callable
+              , CT_callable
+              , CT_transform
             };
 
+            template<typename T, bool IsTransform = is_transform<T>::value>
+            struct get_callable_type2
+            {
+                static callable_type const value = CT_callable;
+            };
+
+            template<typename T>
+            struct get_callable_type2<T, true>
+            {
+                static callable_type const value = CT_transform;
+            };
+
+            template<typename T, bool IsCallable = is_callable<T>::value>
+            struct get_callable_type
+            {
+                static callable_type const value = CT_not_callable;
+            };
+
+            template<typename T>
+            struct get_callable_type<T, true>
+              : get_callable_type2<T>
+            {};
+
             template<typename T, bool HasType = mpl::aux::has_type<T>::value>
             struct nested_type
             {
@@ -55,70 +79,84 @@
                 typedef T type;
             };
 
-            template<typename T, typename Args, typename Void = void>
+            template<
+                typename T
+              , typename Expr, typename State, typename Data
+              , bool Applied, bool IsTransform = is_transform<T>::value
+            >
             struct nested_type_if
+            {
+                typedef T type;
+                static bool const applied = false;
+            };
+
+            template<typename T, typename Expr, typename State, typename Data, bool Applied>
+            struct nested_type_if<T, Expr, State, Data, Applied, true>
+              : uncvref<typename T::template impl<Expr, State, Data>::result_type>
+            {
+                static bool const applied = true;
+            };
+
+            template<typename T, typename Expr, typename State, typename Data>
+            struct nested_type_if<T, Expr, State, Data, true, false>
               : nested_type<T>
-            {};
+            {
+                static bool const applied = true;
+            };
 
-            template<typename R, typename Expr, typename State, typename Data
+            template<
+                typename R
+              , typename Expr, typename State, typename Data
                 BOOST_MPL_AUX_LAMBDA_ARITY_PARAM(long Arity = mpl::aux::template_arity<R>::value)
             >
             struct make_
             {
                 typedef R type;
-                typedef void not_applied_;
+                static bool const applied = false;
             };
 
-            template<typename R, typename Expr, typename State, typename Data
-              , bool IsTransform = is_transform<R>::value
+            template<
+                typename R
+              , typename Expr, typename State, typename Data
+              , callable_type CallableType = get_callable_type<R>::value
             >
-            struct make_if2_
+            struct make_if_;
+
+            template<typename R, typename Expr, typename State, typename Data>
+            struct make_if_<R, Expr, State, Data, CT_callable>
               : make_<R, Expr, State, Data>
             {};
 
             template<typename R, typename Expr, typename State, typename Data>
-            struct make_if2_<R, Expr, State, Data, true>
+            struct make_if_<R, Expr, State, Data, CT_transform>
               : uncvref<typename R::template impl<Expr, State, Data>::result_type>
-            {};
-
-            template<typename R, typename Expr, typename State, typename Data
-                // HACKHACK This should really be is_transform; however, is_transform
-                // would have the unfortunate side-effect of instantiating R which is
-                // not acceptable in this context. Instead, we first check to see if 
-                // R is callable, which will not instantiate R. If is_callable is true,
-                // it is safe to instantiate R to check if it is a transform.
-              , bool IsCallable = is_callable<R>::value
-            >
-            struct make_if_;
+            {
+                static bool const applied = true;
+            };
 
             template<typename R, typename Expr, typename State, typename Data>
-            struct make_if_<R, Expr, State, Data, false>
+            struct make_if_<R, Expr, State, Data, CT_not_callable>
               : make_<R, Expr, State, Data>
             {};
 
             #if BOOST_WORKAROUND(__GNUC__, == 3) || (__GNUC__ == 4 && __GNUC_MINOR__ == 0)
             // work around GCC bug
             template<typename Tag, typename Args, long N, typename Expr, typename State, typename Data>
-            struct make_if_<proto::expr<Tag, Args, N>, Expr, State, Data, false>
+            struct make_if_<proto::expr<Tag, Args, N>, Expr, State, Data, CT_not_callable>
             {
                 typedef proto::expr<Tag, Args, N> type;
-                typedef void not_applied_;
+                static bool const applied = false;
             };
 
             // work around GCC bug
             template<typename Tag, typename Args, long N, typename Expr, typename State, typename Data>
-            struct make_if_<proto::basic_expr<Tag, Args, N>, Expr, State, Data, false>
+            struct make_if_<proto::basic_expr<Tag, Args, N>, Expr, State, Data, CT_not_callable>
             {
                 typedef proto::basic_expr<Tag, Args, N> type;
-                typedef void not_applied_;
+                static bool const applied = false;
             };
             #endif
 
-            template<typename R, typename Expr, typename State, typename Data>
-            struct make_if_<R, Expr, State, Data, true>
-              : make_if2_<R, Expr, State, Data>
-            {};
-
             template<typename Type, bool IsAggregate = is_aggregate<Type>::value>
             struct construct_
             {
@@ -298,21 +336,9 @@
         namespace detail
         {
             #if N > 0
-            template<typename T BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)>
-            struct nested_type_if<
-                T
-              , typelist<BOOST_PP_ENUM_PARAMS(N, A)>
-              , typename typelist<
-                    BOOST_PP_ENUM_BINARY_PARAMS(N, typename A, ::not_applied_ BOOST_PP_INTERCEPT)
-                >::type
-            >
-            {
-                typedef T type;
-                typedef void not_applied_;
-            };
-
             #define TMP0(Z, M, DATA) make_if_<BOOST_PP_CAT(A, M), Expr, State, Data>
             #define TMP1(Z, M, DATA) typename TMP0(Z, M, DATA) ::type
+            #define TMP2(Z, M, DATA) TMP0(Z, M, DATA) ::applied ||
 
             template<
                 template<BOOST_PP_ENUM_PARAMS(N, typename BOOST_PP_INTERCEPT)> class R
@@ -324,7 +350,8 @@
             >
               : nested_type_if<
                     R<BOOST_PP_ENUM(N, TMP1, ~)>
-                  , typelist<BOOST_PP_ENUM(N, TMP0, ~) >
+                  , Expr, State, Data
+                  , (BOOST_PP_REPEAT(N, TMP2, ~) false)
                 >
             {};
 
@@ -338,10 +365,12 @@
             >
             {
                 typedef R<BOOST_PP_ENUM(N, TMP1, ~)> type;
+                static bool const applied = true;
             };
 
             #undef TMP0
             #undef TMP1
+            #undef TMP2
             #endif
 
             template<
@@ -349,14 +378,10 @@
                 BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)
               , typename Expr, typename State, typename Data
             >
-            struct make_if_<R(BOOST_PP_ENUM_PARAMS(N, A)), Expr, State, Data, false>
+            struct make_if_<R(BOOST_PP_ENUM_PARAMS(N, A)), Expr, State, Data, CT_not_callable>
+              : uncvref<typename when<_, R(BOOST_PP_ENUM_PARAMS(N, A))>::template impl<Expr, State, Data>::result_type>
             {
-                typedef
-                    typename uncvref<
-                        typename when<_, R(BOOST_PP_ENUM_PARAMS(N, A))>
-                            ::template impl<Expr, State, Data>::result_type
-                    >::type
-                type;
+                static bool const applied = true;
             };
 
             template<
@@ -364,14 +389,10 @@
                 BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)
               , typename Expr, typename State, typename Data
             >
-            struct make_if_<R(*)(BOOST_PP_ENUM_PARAMS(N, A)), Expr, State, Data, false>
+            struct make_if_<R(*)(BOOST_PP_ENUM_PARAMS(N, A)), Expr, State, Data, CT_not_callable>
+              : uncvref<typename when<_, R(BOOST_PP_ENUM_PARAMS(N, A))>::template impl<Expr, State, Data>::result_type>
             {
-                typedef
-                    typename uncvref<
-                        typename when<_, R(BOOST_PP_ENUM_PARAMS(N, A))>
-                            ::template impl<Expr, State, Data>::result_type
-                    >::type
-                type;
+                static bool const applied = true;
             };
 
             template<typename T, typename A>
@@ -433,7 +454,7 @@
                         #define TMP(Z, M, DATA)                                                     \
                             detail::as_lvalue(                                                      \
                                 typename when<_, BOOST_PP_CAT(A, M)>                                \
-                                    ::template impl<Expr, State, Data>()(e, s, d)         \
+                                    ::template impl<Expr, State, Data>()(e, s, d)                   \
                             )
                         BOOST_PP_ENUM(N, TMP, DATA)
                         #undef TMP
@@ -463,7 +484,7 @@
                         #define TMP(Z, M, DATA)                                                     \
                             detail::as_lvalue(                                                      \
                                 typename when<_, BOOST_PP_CAT(A, M)>                                \
-                                    ::template impl<Expr, State, Data>()(e, s, d)         \
+                                    ::template impl<Expr, State, Data>()(e, s, d)                   \
                             )
                         BOOST_PP_ENUM(N, TMP, DATA)
                         #undef TMP