base: Don't generate unused BoundFunctorTraits typedef

base/bind.h.pump

 $$ This is a pump file for generating file templates.  Pump is a python
 $$ script that is part of the Google Test suite of utilities.  Description
 $$ can be found here:
 $$
 $$ http://code.google.com/p/googletest/wiki/PumpManual
 $$
 
 $$
 $$ MAX_ARITY controls the number of arguments that Bind() supports.
 $$ The amount of code, and more importantly, the number of template types
@@ skipping 75 matching lines @@
         typename internal::FunctorTraits<Functor>::RunnableType,
         typename internal::FunctorTraits<Functor>::RunType,
         void($for ARG , [[typename internal::CallbackParamTraits<P$(ARG)>::StorageType]])>
             ::UnboundRunType>
 Bind(Functor functor
 $if ARITY > 0 [[, ]] $for ARG , [[const P$(ARG)& p$(ARG)]]) {
   // Typedefs for how to store and run the functor.
   typedef typename internal::FunctorTraits<Functor>::RunnableType RunnableType;
   typedef typename internal::FunctorTraits<Functor>::RunType RunType;
 
+$if ARITY > 0 [[
+
   // Use RunnableType::RunType instead of RunType above because our
   // checks should below for bound references need to know what the actual
   // functor is going to interpret the argument as.
   typedef internal::FunctionTraits<typename RunnableType::RunType>
       BoundFunctorTraits;
 
-$if ARITY > 0 [[
-
   // Do not allow binding a non-const reference parameter. Non-const reference
   // parameters are disallowed by the Google style guide.  Also, binding a
   // non-const reference parameter can make for subtle bugs because the
   // invoked function will receive a reference to the stored copy of the
   // argument and not the original.
   COMPILE_ASSERT(
       !($for ARG || [[
 is_non_const_reference<typename BoundFunctorTraits::A$(ARG)Type>::value ]]),
       do_not_bind_functions_with_nonconst_ref);
 
@@ skipping 30 matching lines @@
   return Callback<typename BindState::UnboundRunType>(
       new BindState(internal::MakeRunnable(functor)[[]]
 $if ARITY > 0 [[, ]] $for ARG , [[p$(ARG)]]));
 }
 
 ]]  $$ for ARITY
 
 }  // namespace base
 
 #endif  // BASE_BIND_H_