Enable export of C++ interface for functions that return void

Author: jjallaire

ChangeLog

@@ -1,3 +1,8 @@
+2015-10-01  JJ Allaire <[email protected]>
+
+        * src/attributes.cpp: Enable export of C++ interface for 
+        functions that return void
+
 2015-09-28  Dirk Eddelbuettel  <[email protected]>
 
         * inst/NEWS.Rd: GitHub pull requests and issues are now linked

inst/NEWS.Rd

@@ -12,6 +12,10 @@
       \item No longer use \code{STRING_ELT} as left-hand side, thanks to a
       heads-up by Luke Tierney (PR \ghpr{378} fixing \ghit{377}).
     }
+    \item Changes in Rcpp Attributes:
+    \itemize{
+      \item Enable export of C++ interface for functions that return void.
+    }
     \item Changes in Rcpp Documentation:
     \itemize{
       \item The \code{NEWS} file now links to GitHub issue tickets and pull

src/attributes.cpp

@@ -2035,9 +2035,11 @@ namespace attributes {
                        << "            throw Rcpp::exception(as<std::string>("
                        << "__result).c_str());"
                        << std::endl;
-                ostr() << "        return Rcpp::as<" << function.type() << " >"
-                       << "(__result);" << std::endl;
-
+                if (!function.type().isVoid()) {
+                    ostr() << "        return Rcpp::as<" << function.type() << " >"
+                           << "(__result);" << std::endl;
+                }
+                
                 ostr() << "    }" << std::endl << std::endl;
             }
         }