Avoid vc6 confusion from metafunction forwarding

[SVN r20476]

include/boost/mpl/apply.hpp

@@ -197,10 +197,12 @@ template<
       typename F, AUX_APPLY_N_PARAMS(i, typename T)
     >
 struct BOOST_PP_CAT(apply,i)
-    : BOOST_PP_CAT(aux::msvc_apply,i)<F>::template result_<
-          AUX_APPLY_N_PARAMS(i, T)
-        >
 {
+    // Metafunction forwarding confuses vc6
+    typedef typename BOOST_PP_CAT(aux::msvc_apply,i)<F>::template result_<
+        AUX_APPLY_N_PARAMS(i, T)
+    >::type type;
+    
     BOOST_MPL_AUX_LAMBDA_SUPPORT(
           BOOST_PP_INC(i)
         , BOOST_PP_CAT(apply,i)

include/boost/mpl/aux_/lambda_no_ctps.hpp

@@ -82,15 +82,16 @@ template<
     , bool Protect = true 
     >
 struct lambda
-    : aux::lambda_impl<
+{
+    // Metafunction forwarding confuses vc6
+    typedef typename aux::lambda_impl<
           ::boost::mpl::aux::template_arity<T>::value
 #if !defined(BOOST_MSVC) || BOOST_MSVC > 1200
         , Protect
 #else
         , bool_<Protect>::value
 #endif
-        >::template result_<T,Tag>
-{
+    >::template result_<T,Tag>::type type;
 };
 
 #   undef AUX_LAMBDA_PARAMS

include/boost/mpl/aux_/preprocessed/msvc60/apply.hpp

@@ -48,10 +48,11 @@ template<
       typename F, typename T1
     >
 struct apply1
-    : aux::msvc_apply1<F>::template result_<
-          T1
-        >
 {
+    typedef typename aux::msvc_apply1<F>::template result_<
+          T1
+    >::type type;
+    
     enum { arity = 2 }; typedef F arg1;
  typedef T1 arg2;
  friend class apply1_rebind;
@@ -94,10 +95,11 @@ template<
       typename F, typename T1, typename T2
     >
 struct apply2
-    : aux::msvc_apply2<F>::template result_<
-          T1, T2
-        >
 {
+    typedef typename aux::msvc_apply2<F>::template result_<
+          T1, T2
+    >::type type;
+    
     enum { arity = 3 }; typedef F arg1;
  typedef T1 arg2;
  typedef T2 arg3;
@@ -141,10 +143,10 @@ template<
       typename F, typename T1, typename T2, typename T3
     >
 struct apply3
-    : aux::msvc_apply3<F>::template result_<
-          T1, T2, T3
-        >
 {
+    typedef typename aux::msvc_apply3<F>::template result_<
+          T1, T2, T3
+    >::type type;
     enum { arity = 4 }; typedef F arg1;
  typedef T1 arg2;
  typedef T2 arg3;
@@ -195,10 +197,10 @@ template<
       typename F, typename T1, typename T2, typename T3, typename T4
     >
 struct apply4
-    : aux::msvc_apply4<F>::template result_<
-          T1, T2, T3, T4
-        >
 {
+    typedef typename aux::msvc_apply4<F>::template result_<
+        T1, T2, T3, T4
+    >::type type;
     enum { arity = 5 }; typedef F arg1;
  typedef T1 arg2;
  typedef T2 arg3;
@@ -253,10 +255,10 @@ template<
     , typename T5
     >
 struct apply5
-    : aux::msvc_apply5<F>::template result_<
-          T1, T2, T3, T4, T5
-        >
 {
+    typedef typename aux::msvc_apply5<F>::template result_<
+        T1, T2, T3, T4, T5
+    >::type type;
     enum { arity = 6 }; typedef F arg1;
  typedef T1 arg2;
  typedef T2 arg3;

include/boost/mpl/aux_/preprocessed/msvc60/lambda_no_ctps.hpp

@@ -188,13 +188,11 @@ template<
     , bool Protect = true
     >
 struct lambda
-    : aux::lambda_impl<
-          ::boost::mpl::aux::template_arity<T>::value
-
-        , bool_<Protect>::value
-
-        >::template result_< T,Tag >
 {
+    typedef aux::lambda_impl<
+        ::boost::mpl::aux::template_arity<T>::value
+      , bool_<Protect>::value
+    >::template result_< T,Tag >::type type;
 };
 
 } // namespace mpl