function_base.hpp:

  - Switch over to using is_reference_wrapper instead of homegrown is_ref
  - Identify stateless function objects

function_template.hpp:
  - Optimize away construction/allocator for stateless function objects.


[SVN r12559]

libs/function

@@ -1 +1 @@
-Subproject commit aaa7f61b9ed1fdc33acda1e6f6b928c936f84a34
+Subproject commit 11187bcf3a29e717b05d1d6ef183797743a0a6cb