From edfe7f7df14078448a9df53cb939d9ded09f6ede Mon Sep 17 00:00:00 2001
From: "Daniel C. Dillon" <dcdillon@gmail.com>
Date: Sun, 8 Nov 2015 07:33:11 -0600
Subject: [PATCH] Nullable now accepts R_NilValue as a default parameter.  See
 issue #394.

---
 inst/include/Rcpp/Nullable.h | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/inst/include/Rcpp/Nullable.h b/inst/include/Rcpp/Nullable.h
index 7af5fdc8c..67c02f0cc 100644
--- a/inst/include/Rcpp/Nullable.h
+++ b/inst/include/Rcpp/Nullable.h
@@ -31,13 +31,6 @@ namespace Rcpp {
 
     template<class T>
     class Nullable {
-    private:
-        template<class U>
-        friend class InputParameter;
-
-        template<class U>
-        friend class traits::Exporter;
-
     public:
 
         /**
@@ -55,8 +48,6 @@ namespace Rcpp {
 
         inline Nullable(const T &t) : m_sexp(t),  m_set(true) {}
 
-    protected:
-
         /**
          * Standard constructor of a Nullable object
          *