[Boost-commit] svn:boost r64608 - sandbox/variadic_templates/boost/mpl

Subject: [Boost-commit] svn:boost r64608 - sandbox/variadic_templates/boost/mpl
From: cppljevans_at_[hidden]
Date: 2010-08-04 19:16:28

Author: cppljevans
Date: 2010-08-04 19:15:19 EDT (Wed, 04 Aug 2010)
New Revision: 64608
URL: http://svn.boost.org/trac/boost/changeset/64608

Log:
document reason for BOOST_PP_REPEAT
Text files modified: 
   sandbox/variadic_templates/boost/mpl/bindv.hpp |     9 +++++++++                               
   1 files changed, 9 insertions(+), 0 deletions(-)

Modified: sandbox/variadic_templates/boost/mpl/bindv.hpp
==============================================================================
--- sandbox/variadic_templates/boost/mpl/bindv.hpp	(original)
+++ sandbox/variadic_templates/boost/mpl/bindv.hpp	2010-08-04 19:15:19 EDT (Wed, 04 Aug 2010)
@@ -38,9 +38,18 @@
           >
         : resolve_bind_arg
           < T
+        #if 1
           #define RESOLVE_BIND_ARG_AT_C_US(z,n,data) , typename at_c<package<U...>,n>::type
           BOOST_PP_REPEAT(BOOST_MPL_LIMIT_METAFUNCTION_ARITY,RESOLVE_BIND_ARG_AT_C_US,~)
           #undef  RESOLVE_BIND_ARG_AT_C_US
+        #else
+          //This branch of #if.#else.#endif causes compile failure
+          //with error message about wrong number of template args.
+          //Apparently U... cannot be passed to a fixed arity
+          //template even if sizeof...(U) == template arity.
+          //
+          , U...
+        #endif
           >
         {};